Colorado electrical license and your Denver contractor license: what they let you do and your first 30 days

Published November 3, 2026 · Colorado Revised Statutes 2026, the State Electrical Board's pages, the 2025 Denver Building Code and Xcel's 2026 Blue Book checked November 3, 2026

• Free. The printable checklist comes by email. The full checklist and the job table are on this page too, nothing held back.
• Deepsel is our product: free estimate, invoice and scheduling software for contractors (scheduling and dispatch, quotes, invoicing, card payments). The section before the FAQ says where it fits and where it doesn't.
• Not legal advice. Every rule links to the statute, board rule, code section or agency page it comes from. Ask the State Electrical Board, Denver Contractor Licensing or a Colorado attorney before you bet a job on my reading.

Colorado licenses the electricians and registers the company. Denver adds a free city license on top. Your state electrical contractor registration lets the company take any electrical job in Colorado, of any size, as long as a full-time master electrician is responsible for the work. Your Denver license lets you pull Denver permits for "all work authorized by the Registration issued by the State of Colorado," and Denver inspects that work itself.^{1, 9} Neither comes with an insurance or bond minimum. The real limits are narrower: three apprentices per licensed electrician on a job site, no gas piping, no Denver fire alarm or access control work without extra city licenses, and no pulling the utility's meter without telling the utility.

"What exactly does this license I have allow me to do now?" a newly licensed electrician asked on r/electricians. He was in Louisiana, and the guides that rank for "Colorado electrical license" stop at the exam. This page picks up after it, for a shop working in Denver: what each license covers, where it stops, the permit and utility steps, a job-by-job table and a checklist for the first 30 days. If you also do general building work, Denver's construction classes are in the Colorado contractor license article, and the paperwork side is in what your Colorado contract must include.

The checklist also comes as a printable sheet with blanks for your license, permit, policy and utility account numbers and your renewal dates. Get it three ways: make your own copy in Google Docs (lands in your Drive), download the Word version (.docx), or download the PDF. Pick a format, enter your email and I'll send the links.

Colorado electrical license classes and what each one lets you do

Colorado has three individual electrician licenses and one business registration. The individual license says what a person may do with their hands. The registration says the company may sell electrical work to other people.^{1, 3}

Sources for the table: the statute's definitions and requirements,¹ the board's licensing guide,³ Denver's licensing pages.^{10, 11}

Your Colorado electrical contractor registration and the master behind it

The business and the license are separate things in Colorado. A company doesn't need an electrician as its owner: it can be an electrical contractor "without an electrician's license if all electrical work ... is under the direction and control of a licensed master electrician."¹ That master carries the weight. The statute says a master can be named for one contractor only, must be "actively engaged in a full-time capacity with that contracting company," and "is responsible for all electrical work performed by the electrical contracting company."¹ The form the master signs repeats it: "I assume responsibility for all Electrical work performed by the above-named Electrical Contractor."³

If the master leaves, the master tells the board within 15 days, and the company gets 20 days to name another before its registration goes inactive.^{1, 7} The board can issue a temporary master permit for up to 30 days to bridge the gap.¹

What the registration doesn't ask for is just as useful to know. There's no insurance certificate, no bond and no net-worth test. The board wants evidence that you comply with the workers' compensation and unemployment insurance laws, and its guide says that's "only required if one or more persons with less than 10% stake in the company are employed by the business."³ Insurance minimums come from cities and customers, not the state (more below).

Your Denver electrical contractor license on top

Denver's code says "Electrical and plumbing contractors must register with the Agency," and its license policy says the registration "Performs all work authorized by the Registration issued by the State of Colorado."^{8, 9} The city can't test or license you again: state law reserves electrical licensing to the state and lets cities "impose reasonable registration requirements on any electrical contractor," adding "No fee shall be charged for the registration."¹ Denver's fee table matches: Electrical License, renewed every 3 years, $0.00.¹⁰

So the Denver license adds no new skills. It adds city paperwork and a few city-only lines:

• Change of name or address goes to Contractor Licensing within 15 days. A change of legal entity, say from sole proprietor to LLC, needs a new license within 30 days.¹⁰
• Renewal opens 30 days before expiry and runs to a year after it. "No work shall commence or continue after the date of expiration."^{8, 10}
• Access control is its own Denver license. The code says "An electrical contractor or an electrical signal contractor shall not perform the work that requires an access control system contractor": card readers, mag locks, electric strikes and their wiring. You do the circuits over 48 volts and hard-wire the power supplies.⁸
• Fire alarm systems need a Denver Fire Department license: "all installers of life safety systems ... must have current licenses issued by the Denver Fire Department."¹⁴

Apprentices, journeymen and who can work alone

A licensed master, journeyman or residential wireman can work alone, the wireman only on one- to four-family homes. An apprentice never can. "A licensed electrician shall not directly supervise more than three apprentices at a job site," and direct supervision means the licensed electrician is "physically present at the same physical address where the apprentice is working."¹ An apprentice who already holds a residential wireman license stays a registered, supervised apprentice on commercial work.⁵ You register each apprentice with the board within 30 days of hiring them and report their hours by January 1.¹ The board runs compliance checks on licenses and ratios across the state, whoever issued the permit.¹ One Colorado owner on Reddit: "In Colorado where I’m at you’re required to have 1 licensed individual for every three apprentices. I hold true to this, but I run a small company" (r/electricians). Lending a master license to another company is a separate question; the risks are under "What happens if you cross the line" below.

Where your Colorado electrical license stops

Your registration covers "wiring for, installing, and repairing electrical apparatus and equipment for electric light, heat, and power."¹ These are the places it runs out, or where the law doesn't reach at all:

• Gas piping. Running gas to a generator, range or dryer isn't on Denver's electrical registration. Gas piping sits in Denver's Gas Service, HVAC and plumbing classes, so one of them pulls the gas permit.⁹ You wire the generator and the transfer switch. Outside Denver, ask the building department who may run gas.
• Plumbing. Water supply, drains and water heaters are plumbing, and Denver's plumbing registration covers water heaters.⁹ On an electric water heater swap, you do the wiring and a plumber does the water.
• HVAC equipment. A Denver residential HVAC license includes controls wiring "which does not exceed 48 volts and is not enclosed in a conduit or raceway."⁹ The line-voltage circuit, disconnect and whip to a condenser are electrical work under state law, so they're yours.¹ Setting the unit and the refrigerant work belong to the HVAC contractor under its mechanical permit.
• Fire alarm. State law needs no license for fire alarm systems of 50 volts or less, but they still need permits and inspections.¹ Denver needs more: a Denver Fire Department license for the installer, and an electrical signal contractor or electrical registration contractor for the wiring.^{8, 14} Sub it out unless you hold the fire department license.
• Access control in Denver. Covered above: a separate Denver license, and the code bars electrical contractors from that work.⁸
• Low voltage, data and signs. Class 2 and class 3 circuits, data cabling, phone, TV and antenna systems, security systems of 50 volts or less, and sign wiring beyond the controller terminals sit outside the electrical license law for everyone.¹ You can do them, and so can an unlicensed installer. Signs with lights in them still need a Denver electrical permit.⁸
• Solar. "Only an electrical contractor or a photovoltaic installer may perform or offer to perform photovoltaic electrical work" under 300 kilowatts.¹ The photovoltaic installer registration is for existing solar companies with a NABCEP-certified employee that register by December 31, 2026; you don't need it.³
• Lead paint. Colorado doesn't run its own renovation program, so EPA's rule applies directly. Cut more than 6 square feet of painted surface in a room (20 outside) in a home built before 1978 and the firm needs EPA lead-safe certification, which covers "all firms, even sole proprietorships."³⁰

Colorado electrical permit: who pulls it and who inspects

Only a "qualified applicant" may apply for an electrical permit in Colorado: a master electrician who is also a registered contractor, a master employed by a registered contractor, or a homeowner working on their own home. The statute adds a line aimed at license rental: "A licensed master electrician who is not a registered electrical contractor and who is operating as an independent contractor for another business shall not apply for a permit."¹ Denver issues permits to licensed or registered contractors and to owner-occupiers with homeowner permits.⁸

Most house jobs in Denver are quick permits, issued online without plan review on a single-family home or duplex with single-phase service of 400 amps or less. The list includes new and upgraded services, "New or replacement panels and subpanels," wiring, "Electric vehicle chargers," appliances, disconnect switches, lights and receptacles, and solar under 10 kW DC through SolarAPP+.¹² Denver inspects its own work. The state doesn't inspect inside Denver, or in the other local inspection areas on its list, which include Adams, Arapahoe, Boulder, Broomfield, Douglas, El Paso, Jefferson, Larimer and Weld counties, with a few towns excepted.⁶

Three permit rules catch new contractors:

• Pull your own. The board's rule: "A contractor shall not perform any electrical work under a homeowner's permit or prior electrical contractor's permit but shall secure a new electrical permit in the name of the contractor performing the work."⁷ Taking over someone else's half-finished job means a new permit.
• Permit before work. Denver doubles the permit fee (at least $100) for work started without one and adds an investigation fee of the same amount.⁸ The board fines a missing permit or inspection $375, then $900.⁷
• The homeowner exemption is the owner's. Colorado lets people wire their own home with inspection, but not a home being built to sell or a rental.¹ Denver's homeowner permit is for owner-occupied single-family homes, after an exam, and the helper named on it "cannot accept payment for their services."¹³

Outside Denver

Cities can register you but can't test you again.¹ They differ on paperwork and insurance:

Anywhere else, call the building department before you quote and ask three things: do you register electrical contractors, what insurance certificate do you want, and who inspects.

Xcel Energy Builder's Call Line, meters and co-op utilities

Denver is Xcel Energy territory.¹⁷ There's no contractor registration with Xcel. You sign in to its Building & Remodeling requests and file each service change there, and the Builder's Call Line, 800-628-2121, takes questions. Four rules from Xcel's pages and its Standard for Electric Installation and Use (the "Blue Book," effective August 1, 2026) shape every panel swap and service upgrade:^{17, 18}

• Inspection before the meter. "Prior to scheduling of your meter installation, an approved Inspection Certification must be sent to Xcel Energy." State law backs it: a utility can't connect service that needed inspection without "proof of final approval," except for up to seven days in an emergency.^{1, 17}
• Tell Xcel before you cut a seal. The company "shall be notified when it is necessary to cut the meter seal ... where it is necessary to access the meter socket by a licensed electrician."¹⁸
• Xcel puts the meter back. Once a meter is out, it "shall not be reconnected by anyone except a Company Representative." Jumpering the socket or closing the bypass counts as a closed loop, which needs Xcel's permission first and lasts seven days at most.¹⁸
• No meter-collar generator switches. In Colorado "Only Company-approved plug-in devices (i.e., meter collar adapters) are allowed," and they're "for renewable resources only."¹⁸ The generator transfer switch goes after the meter.

Xcel's page also carries a warning about transformer lead times, so ask early when a bigger service might need a bigger transformer.¹⁷

Co-ops work differently. United Power wants a new construction application for a panel upgrade and says "Electricians may not access meter housings or tamper with cooperative meters."¹⁹ CORE Electric Cooperative takes upgrade requests online and sets the meter "within 3 to 10 business days" after the inspection approval reaches it.²⁰ City-owned utilities, such as those in Colorado Springs and Fort Collins, run their own process. Ask before the first job in their area.

The wait is the cost nobody quotes. "I have 3 underground service I need a disconnect/reconnect scheduled and I'm going on 2 months now with nothing," one electrician wrote (r/electricians). File the utility request when the customer signs, and put the wait in the schedule you give them.

Can I take this job? A table for Denver electrical contractors

The verdicts assume you hold a state electrical contractor registration with a responsible master and a Denver electrical license, and the job is a single-family home or duplex in Denver with single-phase service of 400 amps or less. "Sub it out" means another licensed contractor pulls its own permit for that part.

Your first 30 days: the checklist

This is the whole checklist. The printable version is the same list laid out to tick off, with blanks for the numbers.

A. Licenses and registrations, week 1

1. Look up the company's state registration and the master's license on the DORA license lookup and write down both expiration dates. Colorado's electrical licenses and contractor registrations renew every three years. The board's homepage says licenses expired September 30, 2026 and can be renewed through November 30, 2026, with a late fee in the grace period, so check yours today.^{4, 7}
2. Look up your Denver license on Denver's licensee search and add it to your e-permits account. No fee; renews every 3 years.¹⁰
3. Confirm the responsible master signed the Acknowledgment of Responsibility, works full time for you and is named for no other company.^{1, 3}
4. Advertise only under your registered name. The board's rule: registered contractors "shall not advertise in any manner, by any name, including DBAs, other than the registered company name on record."⁷ Report a Denver name or address change within 15 days; a new legal entity needs a new Denver license within 30 days.¹⁰
5. Every electrician carries their license or apprentice card on the job.⁷

B. Insurance, workers' comp, taxes and apprentices

6. Workers' compensation. With one or more employees, "you must have workers' compensation insurance," part-time and family members included. With none, construction contractors need a policy or a filed rejection of coverage, and general contractors will ask for proof.²⁵
7. Open an unemployment insurance account with the Colorado Department of Labor and Employment if you employ people. The state registration asks for proof of compliance.^{1, 3}
8. General liability. No minimum on the state registration. Denver and Boulder require $1,000,000 per occurrence and $2,000,000 aggregate, the Pikes Peak Regional Building Department's table sets $1,000,000 / $2,000,000, and general contractors often ask for a certificate.^{9, 22, 23}
9. Bond: none required by the state or Denver.^{3, 10}
10. Denver Treasury. Denver's Occupational Privilege Tax is $4 a month for each owner or manager working in Denver and $9.75 a month for each employee who earns $500 or more there in a month ($5.75 of it withheld from the employee). It applies "regardless of whether a permanent location is maintained in Denver." Denver also charges use tax on materials and tools used on Denver jobs when no Denver sales tax was paid, and "does not collect use tax at the time a building permit is issued," so open a consumer use tax account too.¹⁶
11. Register each apprentice within 30 days of hire, keep to three per licensed electrician on site, and report hours by January 1.¹

C. The cities you'll work in

12. Aurora: file your state master's and contractor's licenses with the Building Division.²¹
13. Colorado Springs and El Paso County: register with the Pikes Peak Regional Building Department, insurance certificate first.²²
14. Boulder: get the City of Boulder electrical contractor license.²³
15. Fort Collins: get the city contractor license.²⁴
16. Set up an account for state permits if you'll work where the state inspects.⁶ For any other town, call the building department before you quote.

D. Utilities

17. Xcel Energy: sign in to Building & Remodeling requests, save the Builder's Call Line (800-628-2121), and learn the four meter rules above.^{17, 18}
18. United Power and CORE Electric Cooperative, if you'll work in their areas: know their upgrade process before you quote.^{19, 20}
19. Any other utility: ask how it wants service changes requested and who may pull a meter.

E. Paperwork, quotes and jobs

20. Put your registered name, state registration number and Denver license number on quotes, contracts, invoices, the website, ads and trucks. I found no Colorado or Denver rule that requires the numbers, but customers and inspectors look you up, and false or misleading advertising is grounds for discipline.¹ The titles "master electrician," "journeyman electrician" and "residential wireman" are only for license holders.¹
21. If you advertise a price ("panel swap from ..."), Colorado's 2026 pricing law wants the total price, mandatory fees included, as one number.²⁶
22. Put a permit line on every quote that needs one, and pull every permit in your own name.⁷ Line up the subs you'll need in Denver: gas, plumbing, fire alarm, access control.
23. If you'll cut into pre-1978 walls, get the firm EPA lead-safe certified and a certified renovator on the crew.³⁰

F. Renewal and continuing education

24. Put every renewal in the calendar with a 60-day reminder: state registration, each electrician's license, Denver license, insurance, workers' comp, city licenses.
25. Continuing education: each licensed electrician needs "at least 24 hours of Continuing Education (CE) during each three-year license period," at least 4 hours on National Electrical Code changes and no more than 4 on safety, from a provider on the board's attested list. The first renewal after passing the exam is exempt.⁴

What happens if you cross the line

Working without a license, a registration or a permit

• It can be a crime. Practicing "the profession of an electrician" without an active license is a class 2 misdemeanor: up to 120 days in jail, a fine of up to $750, or both.²
• Board fines. For licensees and registrants, up to $1,000 for a first offense, $2,000 for a second and $2,000 a day after that.¹ The board's schedule in the rules I could read: running an electrical contracting business without registration $750, then $1,500; employing unlicensed people to do electrical work $300, then $600; no permit or no inspection $375, then $900; breaking the apprentice ratio $375, then $600.⁷
• Denver's penalties. Breaking the building code carries the city's general penalty of up to $999, up to 300 days in jail, or both, and "each day an offense and violation continues shall constitute a separate offense." Work without a permit pays double fees plus an investigation fee, the violation notice can be recorded against the property, and Denver can suspend or revoke your license for up to three years.^{8, 15}
• The customer can sue. Failing "to obtain all governmental licenses or permits required to perform the services" is a deceptive trade practice under the Colorado Consumer Protection Act: actual damages or $500, whichever is more, three times damages for bad faith, plus attorney fees, and the state can seek up to $20,000 per violation ($50,000 when the customer is elderly).²⁶

Getting paid

Colorado courts generally don't enforce contracts for work that required a license the contractor didn't hold. The Colorado Court of Appeals in 1994: "If a contractor is required to have specific licenses and permits to undertake work, the contractor cannot recover compensation for its services when the contractor fails to obtain such licenses or permits."²⁹ The rule goes back to a 1950 Colorado Supreme Court case.²⁷ There's one softening: in 1956 an unlicensed plumber couldn't collect for the plumbing but could recover for "labor performed not requiring the services of a licensed plumber."²⁸ For an electrician the lesson is plain: an expired registration or a job without a permit can cost you the invoice, not only a fine.

Insurance

I found no Colorado rule on what unlicensed or unpermitted work does to your own policy. The state's permit page warns homeowners that their insurance "may not cover the costs of repair for the work performed by anyone without liability insurance who causes damage to your home."⁶ Your policy wording decides your side, so ask your agent in writing whether you're covered for work done without a required permit, and keep the reply.

Lending your license

Masters get asked to "sign for" other companies. The board's fine schedule lists "Deception, misrepresentation or fraud in obtaining or attempting to obtain a license (includes loaning a license)" at $1,000, then $2,000.⁷ Denver lists "Allowing one's license or certificate to be used by another person" as grounds to suspend or revoke.⁸ And because the master "is responsible for all electrical work performed by the electrical contracting company," the risk follows the name.¹ One electrician put it bluntly: "You could end up behind bars because of someone else’s mistake made under work done in your name" (r/electricians).

More for new electrical contractors

• How much to charge per hour: service call, first hour and hourly rate, with a free rate sheet.
• Flat rate, per opening or hourly: how electricians price each kind of job, with a free price sheet.
• 200 amp service upgrade checklist: scope, permit, utility, inspection and price.
• Someone asked to use your master license: what being a company's qualifier pays, and what it can cost you.

Where Deepsel fits

Deepsel is the field service software I build, and it doesn't know Colorado's electrical rules. It won't pull a permit, track your license or CE dates, or file a request with Xcel. Two things it does help with here. The shop-wide terms text you set once is copied onto every quote and shows under "Terms" on the customer's quote page, and the invoice footer is copied onto every invoice, so your registered name, state registration number and Denver license number go on every document without retyping. And you can build a checklist template once in Settings (say: permit pulled, utility request filed, rough-in passed, final passed, meter set) and add it to each service upgrade quote; it stays internal, and every tick records who checked it and when. Quotes can carry options, customers approve and sign on screen, and an optional card deposit is credited on the final invoice. Free covers 30 estimates and 30 invoices a month for your whole team; Pro is $29 a month with unlimited estimates and invoices (pricing).

Frequently asked questions

Do electricians need to be licensed in Colorado?

Yes. Nobody may work at the trade of a master electrician, journeyman electrician or residential wireman in Colorado without a state license, and a business that offers electrical work to others must register with the State Electrical Board as an electrical contractor. Apprentices need no license but must be registered and directly supervised. Working as an electrician without a license is a class 2 misdemeanor. The exceptions are narrow: a homeowner's own home, class 2 and 3 low-voltage circuits, data and communications cabling, security systems of 50 volts or less, and fire alarm systems of 50 volts or less, which still need permits and inspection.

Is there a Colorado electrical contractor license?

Colorado calls it a registration. The State Electrical Board registers the business once it holds or employs a master electrician who is responsible for all its electrical work, and it has shown it complies with the workers' compensation and unemployment laws. The individual licenses are separate: master electrician, journeyman electrician and residential wireman. There is no dollar limit on the jobs a registered contractor can take, and no state insurance or bond minimum.

How do I get a Denver electrical contractor license?

Get the state electrical contractor registration first. Then apply in Denver's e-permits system as a contractor, uploading your current state electrical contractor card, a copy of the master electrician's ID and the Secretary of State documents for your company. You don't need a Denver supervisor certificate if you hold a state electrical license. Denver charges $0, reviews online applications in about 14 to 20 business days, and the license renews every three years.

Who can pull an electrical permit in Colorado?

Only a qualified applicant: a licensed master electrician who is also a registered electrical contractor, a master employed by a registered contractor, or a homeowner doing work on their own home. A master who isn't registered and works as an independent contractor for another business can't apply. In Denver, permits go to registered contractors and to owner-occupiers of single-family homes with homeowner permits, and a contractor must pull its own permit instead of working under the homeowner's.

What is the apprentice ratio for electricians in Colorado?

Three apprentices per licensed electrician at a job site. The licensed master, journeyman or residential wireman must be physically present at the same address as the apprentices. The contractor registers each apprentice with the State Electrical Board within 30 days of hiring them and reports their hours by January 1 each year. The board's fine for breaking the ratio is $375 for a first offense and $600 for a second.

When do Colorado electrical licenses expire?

Colorado electrical licenses and contractor registrations renew every three years. The board's homepage says licenses expired September 30, 2026 and can be renewed through November 30, 2026, inside a 60-day grace period with a late fee. Each license holder needs 24 hours of continuing education per three-year period, at least 4 of them on National Electrical Code changes, except for the first renewal after passing the license exam. Check your own date on the DORA license lookup.

Does Colorado have reciprocity for electrical licenses?

For journeyman electricians only. Under the regional reciprocal agreement Colorado issues a journeyman license without an exam to someone who holds a journeyman or master license from a participating state, earned by passing a state exam and held for at least a year. Other licenses can come by endorsement if the out-of-state license was issued by a state, not a city or county, and earned on the current National Electrical Code. The list of reciprocal states is on the board's Applications and Forms page.

Do I need insurance or a bond for a Colorado electrical contractor registration?

Not for the state registration. The state asks only for proof that you comply with the workers' compensation and unemployment laws, and only if you employ people. Some places set their own minimums: Denver's licensing policy requires $1,000,000 per occurrence and $2,000,000 aggregate general liability for every Denver license and registration, electrical included, plus workers' compensation of $100,000 per occurrence and $250,000 aggregate (or a rejection of coverage if you have no employees). Boulder requires $1,000,000 per occurrence and $2,000,000 aggregate general liability, and the Pikes Peak Regional Building Department's table sets $1,000,000 / $2,000,000 for electrical contractors. Workers' compensation is required as soon as you have one employee.

Sources

1. Colorado Revised Statutes title 12, article 115 (electricians): 12-115-103 (definitions, including apprentice, "direct supervision," electric light, heat, and power excluding NEC chapter 8, electrical contractor, electrical work, journeyman, master, residential wireman), 12-115-107(2)(f) (photovoltaic work), 12-115-109 (license required; residential wireman scope), 12-115-110 (license requirements; continuing education; contractor registration, workers' compensation and unemployment compliance, master for one contractor, full time, 15-day notice, responsible for all work), 12-115-112 (titles), 12-115-114 (temporary permits, up to 30 days), 12-115-115 (three apprentices per licensed electrician at a job site; registration within 30 days; report by January 1), 12-115-116 (exemptions: own property, contractor under a master, local registration with no fee, security, data, communications and sign wiring, fire alarm of 50 volts or less, class 2 and 3 circuits), 12-115-119(3) (compliance checks), 12-115-120 (permits, qualified applicant, utility service only on final approval, state inspection within three working days), 12-115-122 (discipline, including false advertising and employing unlicensed persons; fines up to $1,000, $2,000 and $2,000 per day), 12-115-123. olls.info, Colorado Revised Statutes 2026, read November 3, 2026.
2. C.R.S. 12-20-407(1)(a)(V)(B) (practicing the profession of an electrician without an active license is a class 2 misdemeanor), olls.info title 12; C.R.S. 18-1.3-501(1)(a.5) (class 2 misdemeanor: up to 120 days, up to $750, or both), olls.info title 18. Read November 3, 2026.
3. Colorado State Electrical Board, "Applications and Forms" (experience requirements; "Journeyman electricians cannot be a signatory authority for a company"; contractor registration: a responsible master for one company only, workers' compensation and unemployment compliance), dpo.colorado.gov; the board's Electrical Licensing Guide (contractor checklist: workers' compensation and unemployment information "only required if one or more persons with less than 10% stake in the company are employed by the business"; reciprocity for journeyman licenses; photovoltaic installer registration by December 31, 2026), PDF; "Acknowledgment of Responsibility | Electrical Contractor," PDF. All read November 3, 2026.
4. Colorado State Electrical Board homepage ("Licenses expire on 9/30/2026 and can be renewed through 11/30/2026"), dpo.colorado.gov; "Colorado Electrical CE" (24 hours per three-year license period, 4 on NEC changes, no more than 4 on safety, first renewal after the exam exempt), dpo.colorado.gov. Both read November 3, 2026.
5. Colorado Division of Professions and Occupations, "Electrical & Plumbing Apprenticeships: Quick Information Guide" (October 2025): residential-licensed apprentices on commercial work stay registered and supervised; registration within 30 days. PDF, read November 3, 2026.
6. Colorado Division of Professions and Occupations, "Colorado Electrical and Plumbing Permits Homepage" (the state doesn't inspect in local jurisdictions with their own program, and the list of those areas; homeowner notice on insurance; online permits). dpo.colorado.gov, read November 3, 2026.
7. State Electrical Board Rules and Regulations, 3 CCR 710-1, the version amended through March 16, 2024 (the board adopted further changes effective March 30, 2026, which I couldn't read): rule 1.5 (2023 NEC), rule 1.9 A.5 (contractor's own permit, not under a homeowner's or prior contractor's permit), the fine schedule, renewal every three years with a 60-day grace period and late fee, 20 days to replace a responsible master, licenses carried on the person, advertising only under the registered company name. sos.state.co.us, read November 3, 2026.
8. City and County of Denver, 2025 Denver Building Code, Administration: references to NFPA 70 mean "the Electrical Code as adopted by the State of Colorado"; 107.3 and 107.4.1 (penalties under DRMC 1-13, each day separate; recorded notice), 121.1 and 121.2 (registrant; "Electrical and plumbing contractors must register with the Agency"), 121.5 (access control; electrical contractors barred from access control work; circuits over 48 volts), 125.1 (renewal; no work after expiration), 126.1 and 126.2 (permits before work; licensed subs; insurance "as defined by the building official in policy"; registrants follow the state board), 127.1 and 127.4 (discipline, including "Allowing one's license or certificate to be used by another person"; up to three years), 130.3 item 22 (signs with lighting need an electrical permit), 130.3.2, 131.3 and 131.4 (who receives permits; homeowner permits), 138.2 and 138.3 (double fees, minimum $100, plus an equal investigation fee). denvergov.org, read November 3, 2026.
9. Denver Community Planning and Development, building permit policy 25-DCBC 120A, "Classification of Licenses, Registrations and Certificates": "Registration is required for all state licensed electrical and plumbing contractors"; "Electrical Registration - Performs all work authorized by the Registration issued by the State of Colorado"; Access Control System and Electrical Signal contractors; HVAC Residential Only (low-voltage wiring of 48 volts or less outside conduit); Gas Service; Plumbing Registration Class A (gas piping, water heaters); Insurance Coverage Requirements, "for all scopes of work and licensure types": workers' compensation $100,000 per occurrence and $250,000 aggregate (or rejection of coverage with no employees), general liability $1M per occurrence and $2M aggregate. denvergov.org, read November 3, 2026.
10. City and County of Denver, Contractor Licensing: Contractor Licenses (renewal from 30 days before to one year after expiry), Apply for a Contractor's License (state electrical contractor card and the master's ID; Secretary of State documents; 14 to 20 business days), Contractor License Application (name or address change within 15 days; new legal entity within 30 days; no insurance or bond field), Contractor Licensing Fees (Electrical License, renewed every 3 years, $0.00). All read November 3, 2026.
11. City and County of Denver, "Electrical Certificates": "If you have an electrical license from the State of Colorado, you do not need a supervisor certificate"; Access Control System Supervisor and Electrical Signal certificates; Denver Fire Department licenses for life safety systems. denvergov.org, read November 3, 2026.
12. City and County of Denver, "Quick Permits," electrical: single-family and duplex, single-phase service of 400 amps or less; services and upgrades, panels and subpanels, wiring, electric vehicle chargers, appliances, disconnect switches, solar PV under 10 kW DC through SolarAPP+, energy storage, lighting and receptacles. denvergov.org, read November 3, 2026.
13. City and County of Denver, "Applying for Permits as a Homeowner": owner-occupied single-family homes; exam before electrical work; "The designated worker cannot accept payment for their services." denvergov.org, read November 3, 2026.
14. Denver Fire Department, "Fire Safety Systems Licensing": "all installers of life safety systems, and all those who perform the service of inspecting those systems, must have current licenses issued by the Denver Fire Department," including fire alarm systems. denvergov.org, read November 3, 2026.
15. Denver Revised Municipal Code § 1-13, "General penalty": up to $999, up to 300 days, or both; each day a separate offense. library.municode.com, read November 3, 2026.
16. Denver Department of Finance, Treasury: Tax Guide Topic 61, "Occupational Privilege Taxes" ($5.75 employee and $4.00 business per month; $4.00 per owner, partner or manager; minimum $4.00 a month for any entity with activity in Denver "regardless of whether a permanent location is maintained in Denver"), PDF; Tax Guide Topic 47, "Licenses and Registration," PDF; "General Contractors and Subcontractors - Construction within Denver" (use tax on construction materials, supplies, tools and equipment; not collected at the permit; consumer's use tax account), PDF. All read November 3, 2026.
17. Xcel Energy (Colorado), "Building & Remodeling" (online requests; Builder's Call Line 800-628-2121; transformer lead-time notice), co.my.xcelenergy.com; "Construction and Meter Install" ("Prior to scheduling of your meter installation, an approved Inspection Certification must be sent to Xcel Energy"), co.my.xcelenergy.com; "Service Guide, Colorado" (April 2022; Denver among communities served with electricity and gas), PDF. All read November 3, 2026.
18. Xcel Energy, "Standard for Electric Installation and Use" (the Blue Book), effective August 1, 2026: section 2.7 (company connects and disconnects; notify the company before cutting a meter seal), 2.8 (Colorado: only company-approved meter collar adapters, for renewable resources only), existing services (only a company representative reconnects a disconnected meter; closed loops need permission, up to seven days), distributed generation (parallel generation follows the company's interconnection guidelines). PDF, read November 3, 2026.
19. United Power, "Meter Disconnects & Tampering": panel upgrades need a new construction application; "Electricians may not access meter housings or tamper with cooperative meters." unitedpower.com, read November 3, 2026.
20. CORE Electric Cooperative, "New Construction": online applications including upgrades; meter set "within 3 to 10 business days" after an approved inspection. core.coop, read November 3, 2026.
21. City of Aurora, "Contractor Licensing and Lookup" (electricians and plumbers: state master's and contractor's licenses on file; no separate city license). auroragov.org, read November 3, 2026.
22. Pikes Peak Regional Building Department, "License Types" (E-A, RBC206.1: Colorado licensed electrical contractors register) and "Licensing FAQ" (RBC201.7: insurance certificate before a license or registration issues; electrical contractors $1,000,000/$2,000,000; workers' compensation certificate or rejection of coverage). LicenseTypes, LicensingFAQ, read November 3, 2026.
23. City of Boulder, "Contractor Licensing" (Electrical Contractor License; no reciprocal licenses; $1,000,000 per occurrence and $2,000,000 aggregate general liability, City of Boulder additional insured). bouldercolorado.gov, read November 3, 2026.
24. City of Fort Collins, "Contractor Licensing" FAQ (all contractors licensed; master electricians listed on permits). fcgov.com, read November 3, 2026.
25. Colorado Department of Labor and Employment, Division of Workers' Compensation, "Workers' Compensation Insurance Requirements" (one or more employees; construction contractors without employees: a policy or a rejection of coverage). cdle.colorado.gov, read November 3, 2026.
26. Colorado Consumer Protection Act, C.R.S. 6-1-105(1)(z) (failing to obtain required licenses or permits), 6-1-112(1)(a) and (c) (up to $20,000 per violation, $50,000 against an elderly person), 6-1-113(2) (actual damages or $500, treble damages for bad faith, attorney fees), 6-1-737 (advertised prices must show the total price from January 1, 2026). olls.info, Colorado Revised Statutes 2026, read November 3, 2026.
27. Benham v. Heyde, 122 Colo. 233, 221 P.2d 1078 (Colo. 1950). courtlistener.com, read November 3, 2026.
28. Carter v. Thompkins, 133 Colo. 279, 294 P.2d 265 (Colo. 1956). courtlistener.com, read November 3, 2026.
29. Aspen Drilling Co. v. Hayes, 876 P.2d 86 (Colo. App. 1994). courtlistener.com, read November 3, 2026.
30. EPA, "Lead Renovation, Repair and Painting Program" (authorized states, Colorado not among them; "all firms, even sole proprietorships"), epa.gov; 40 CFR 745.83 (minor repair and maintenance: 6 sq ft per room inside, 20 sq ft outside), law.cornell.edu. Both read November 3, 2026.