The top electrical, communications, fire alarm, and security related companies in Colorado
Short answer: Exchange lists 8 electrical contractors in Colorado. Electricians are licensed, and electrical contractors registered, by the Colorado State Electrical Board within the Department of Regulatory Agencies (DORA) under Title 12, Article 115 of the Colorado Revised Statutes. Any business doing electrical work for others must register and have a licensed master electrician supervising all of its electrical work. Colorado adopted the 2026 National Electrical Code effective August 1, 2026, and a permit must be obtained before any installation begins.
Licensing board
The Colorado State Electrical Board, part of DORA's Division of Professions and Occupations, licenses electricians and registers electrical contractors in Colorado.
Governing statute
Colorado electrical licensing, permits and inspections are governed by C.R.S. Title 12, Article 115.
Contractor rule
A Colorado electrical contractor must be owned in part by, or employ, a licensed master electrician who supervises all of its electrical work, and that master can qualify only one contractor.
Electrical code
The 2026 National Electrical Code took effect in Colorado on August 1, 2026, replacing the 2023 edition for new submittals.
Apprentice ratio
A Colorado licensed electrician may directly supervise no more than three apprentices on a job site.
Lien deadline
Most Colorado mechanics' lien statements must be filed within four months after the claimant's last labor or materials, after a notice of intent served at least ten days before filing.
Who licenses and regulates electrical contractors in Colorado?
Electrical work in Colorado is regulated at the state level by the Colorado State Electrical Board, which sits inside the Division of Professions and Occupations at the Department of Regulatory Agencies, usually shortened to DORA. The board's authority comes from C.R.S. Title 12, Article 115, which covers licensing of individual electricians, registration of electrical contractors, apprentice supervision, permits and inspections. Unlike many trades in Colorado, where licensing is left to cities and counties, electrical licensing is statewide, so a license issued by the board is valid anywhere in the state.
The statute draws a clear line between the person and the business. Individuals hold licenses as master electrician, journeyman electrician or residential wireman. A business that offers to plan, lay out, supervise, install, alter or repair wiring for electric light, heat and power for others is an electrical contractor and must register with the board. A licensed professional engineer who only designs electrical installations is not treated as a contractor.
Contractor registration has three practical elements. The business pays the registration fee, shows proof that it complies with Colorado workers' compensation and unemployment insurance requirements, and names a licensed master electrician who is responsible for all of its electrical work. That master can be an owner or part owner who supervises the work, or an employee. Either way, the master may serve as the qualifying master for only one contractor, must be actively engaged full time with that company, and must notify the board within fifteen days of leaving the role.
Local governments are limited in what they can add on top. Cities, counties and qualifying state colleges cannot require state-licensed electricians or registered apprentices to obtain a separate local license. They may impose a reasonable registration requirement on contractors working in their jurisdiction, but the statute says no fee may be charged for it. For an owner or general contractor, that means the state board's records are the authoritative place to confirm who is allowed to do the work.
What license types exist in Colorado and what experience do they require?
Colorado issues three main individual licenses. A residential wireman is qualified to wire and install electrical apparatus and equipment in one-, two-, three- and four-family dwellings, and the license must be clearly marked as residential across its face. A journeyman electrician may wire, install and repair electrical apparatus and equipment on any type of project. A master electrician is qualified to plan, lay out and supervise installations, and is the license that allows a business to register as an electrical contractor.
Under C.R.S. 12-115-110, a residential wireman applicant needs at least two years of accredited training or practical experience wiring one- to four-family dwellings. A journeyman applicant needs four years of apprenticeship or practical experience, at least two of which must be in commercial, industrial or substantially similar work, plus at least 288 hours of training in safety and the National Electrical Code during the previous four years. Graduates of electrical engineering degrees or board-approved trade school and community college programs can receive one year of experience credit.
A master electrician applicant generally builds on the journeyman requirements with at least one additional year of experience planning, laying out, supervising and installing wiring. The statute also provides routes for graduate electrical engineers with one year of practical construction experience and for trade school or community college graduates with at least four years of practical electrical work. All three licenses require passing the board's examination.
Licenses run on a three-year cycle, and the board requires 24 hours of continuing education per license period for residential wiremen, journeymen and masters. The current cycle ended on September 30, 2026, and the board is accepting renewals through November 30, 2026. When you vet a contractor this autumn, confirm that the qualifying master's license shows as renewed and active rather than simply listed, because a lapsed master license affects the whole company's ability to pull permits.
Which licenses, permits and registrations apply in Colorado?
Licence / permit / registration
Issued by
Who needs it
Key threshold or rule
Electrical contractor registration
Colorado State Electrical Board (DORA)
Any business doing electrical work for others in Colorado
Must have an owner or employee master electrician supervising all electrical work, plus proof of workers' compensation and unemployment insurance compliance
Master electrician license
Colorado State Electrical Board
Person qualifying a contractor and supervising its work
Journeyman-level experience plus at least one more year planning and supervising installations; qualifies only one contractor
Journeyman electrician license
Colorado State Electrical Board
Electricians working without direct supervision on any project type
Four years of apprenticeship or experience, two in commercial or industrial work, plus 288 hours of safety and NEC training
Residential wireman license
Colorado State Electrical Board
Electricians limited to dwellings
Covers one- to four-family dwellings only; two years of training or experience
Apprentice registration
Colorado State Electrical Board
Every electrical apprentice
Registered by the employer within 30 days; no more than three apprentices per supervising electrician
Electrical permit
State Electrical Board or qualifying local building department
Installations requiring inspection, before work begins
Only a registered contractor's master, or a homeowner on their own home, may apply; valid 12 months
How do I check an electrical contractor in Colorado before I sign?
7 checks, in order, using the Colorado registers and rules described on this page:
Search DORA's online license lookup for the company's electrical contractor registration and confirm it is active.
Identify the qualifying master electrician named on the registration and confirm that license was renewed after the September 30, 2026 expiry date.
Ask whether the job will be inspected by the State Electrical Board or by a local building department, and confirm the permit is issued to the registered contractor before work starts under C.R.S. 12-115-120.
Confirm which NEC edition the permit falls under, 2026 for submittals from August 1, 2026 or 2023 for earlier plan-review submittals where the jurisdiction allows it.
On sites with apprentices, check that no more than three apprentices are working under each licensed electrician, as C.R.S. 12-115-115 requires.
Ask which energy code your jurisdiction currently enforces under HB22-1362 and how the bid covers electric ready, solar ready, EV ready and demand response requirements.
Collect lien waivers at each payment and track the four-month lien filing and six-month enforcement windows under C.R.S. 38-22-109 and 38-22-110.
Which National Electrical Code edition applies in Colorado right now?
Colorado adopts the National Electrical Code statewide through the State Electrical Board's rules rather than leaving the choice to each city. In 2026 the board held a permanent rulemaking hearing on May 27 to revise Rule 1.5 and adopt the 2026 edition of the NEC, NFPA 70. The City and County of Denver has confirmed that the State of Colorado adopted the 2026 NEC on August 1, 2026, which means the 2026 edition is now the minimum standard for electrical installations across the state.
The changeover matters for projects already in design. Denver's Community Planning and Development department has said that all new project submittals from August 1, 2026 must comply with the 2026 NEC, while projects submitted for plan review before that date may continue to use the 2023 NEC as their basis of design. Other jurisdictions may set their own transition rules for submittals in the pipeline, so owners with work spanning the changeover should ask their electrical contractor which edition the permit was issued under and keep that in the project record.
Before August 1, 2026, Colorado enforced the 2023 NEC, which had been effective since August 1, 2023. That pattern, with a new edition taking effect in August roughly three years after the previous one, is typical of how the board moves through NEC cycles. Contractors who work across several Colorado jurisdictions should be expected to know both editions, because inspections on older permits can still be judged against the 2023 code.
The board also issues policies that interpret or vary the code for specific situations. In 2026 it proposed revisions to Policy 3.3, which deals with electric vehicle power infrastructure in multifamily buildings, and took written comments ahead of a March 25, 2026 public policy hearing. Anyone building or retrofitting multifamily housing with EV charging should ask the contractor whether that policy applies and how it affects service sizing and load management.
Who issues electrical permits and performs inspections in Colorado, the state or local building departments?
Colorado runs a hybrid system. Under C.R.S. 12-115-120, a permit application goes either to the State Electrical Board or to a local building department that meets the state's minimum standards. Incorporated cities and towns, counties, consolidated city and county governments such as Denver, and qualifying state higher-education institutions can run their own electrical inspection programs. Where no local program exists, the state's own electrical inspectors do the work, a role the state has played since it created its inspection program in 1965 for areas lacking local enforcement.
There is one important exception that owners in the education sector should know. State electrical inspectors must handle all public school construction, remodeling and repair, even in a city or county that otherwise inspects its own electrical work. Local entities that want to start or stop doing their own inspections must give the board written notice by October 1 of the prior year, and the change takes effect the following July 1.
Not everyone may apply for a permit. Only a qualified applicant can: a licensed master electrician who is also a registered electrical contractor, a master electrician directly employed by a registered contractor, or a homeowner working on their own home. A master who is not a registered contractor and works as an independent contractor for another business cannot pull the permit. The permit must be in place before any installation begins, and the permit fee is paid up front.
Where the state inspects, the statute sets service standards. A state inspector must inspect new construction, remodeling or repair within three working days of receiving an inspection request and must give written reasons for any failure within two working days, with a copy to the contractor. A disapproved applicant can appeal to the board, which must hold a hearing within seven days. Permits are generally valid for 12 months, with board discretion to allow up to three years for substantial work or a six-month extension requested before expiry. In Denver, Colorado Springs and other large jurisdictions, permits and inspections run through the local building department, so check its portal for the permit record.
How do apprenticeship, supervision and the homeowner exemption work in Colorado?
Colorado sets a firm supervision ratio in C.R.S. 12-115-115. An apprentice may not wire light, heat or power equipment unless directly supervised by a licensed electrician, and a licensed electrician may directly supervise no more than three apprentices on a job site. The supervising contractor or electrician is responsible for the apprentice's work and can be disciplined by the board for improper work. Local inspectors are required to check licensing and apprentice supervision as part of their reviews.
Employers carry registration and reporting duties. The electrical contractor must register each apprentice with the board within 30 days of initial employment and notify the board when an apprentice leaves. By January 1 each year, contractors, registered apprenticeship programs and recognized state apprenticeship agencies must report each apprentice's cumulative practical and classroom hours toward journeyman licensure. Apprentices registered for six years or more who have completed 8,000 practical hours must sit the journeyman exam at least once every three-year renewal cycle until they pass.
Colorado also has a meaningful homeowner exemption, which affects owners comparing bids. Under C.R.S. 12-115-116, owners may do electrical work on their own property or residence without a license, provided the work is inspected. The exemption does not extend to property intended for sale or resale by builders, rental property, lodging or property generally open to the public. A landlord or flipper therefore cannot rely on it, and anyone selling a house should be ready to show permits and inspections for owner-performed work.
Several categories of work are exempt from licensing or permits altogether, including like-for-like maintenance and repair of existing facilities, security systems of 50 volts or less, sprinklers, communications and sound systems, and Class 2 and Class 3 power-limited circuits. Fire alarm systems at 50 volts or less remain subject to permit and inspection, which is a common point of confusion on tenant improvement projects.
What mechanics' lien and payment rules affect electrical work in Colorado?
Colorado's mechanics' lien law is in C.R.S. Title 38, Article 22, and its deadlines are short. Before recording a lien statement, a claimant must serve a notice of intent on the owner and the prime contractor at least ten days before filing, by personal service or by registered or certified mail with return receipt, and record an affidavit of service with the lien. Most claimants, including electrical subcontractors and suppliers, must then file the lien statement within four months after their last labor or last delivery of materials. Workers paid by the day or piece without materials have only two months after completion of the structure.
Enforcement is just as tight. Under C.R.S. 38-22-110, a lien does not hold the property longer than six months after the last work is performed or the improvement is completed unless, within that window, an action to enforce it is commenced and a notice of that action is recorded with the county clerk and recorder. Stopping all work for three months counts as completion for deadline purposes, which matters on projects that stall mid-construction.
Owners have some protections. A bona fide purchaser of a one- or two-family dwelling generally takes free of later lien claims unless they knew of unpaid amounts, a lien statement was already recorded, or a notice under C.R.S. 38-22-109(10) was filed in time. Owners commissioning work should still collect lien waivers from the electrical contractor and its suppliers at each payment, because the window for a valid claim stays open for months after the last day on site.
Public projects have their own payment rules. Under C.R.S. 24-91-103, on public works contracts over $150,000 a public entity must pay at least 95 percent of the value of completed work each month, so retainage is capped at 5 percent, with final settlement due within 60 days of final acceptance. Prime contractors must pay subcontractors within seven calendar days of receiving payment, and late payments carry interest at the contract rate or 15 percent per year, whichever is higher. Electrical subcontractors bidding Colorado public work should price with those terms in mind.
How do Colorado's energy code and electrification laws change electrical scopes?
Colorado's House Bill 22-1362 tied local building code updates to state energy standards, and it shapes much of today's electrical work. Between July 1, 2023 and July 1, 2026, any city or county that updated its building codes had to adopt codes at least as strict as the 2021 International Energy Conservation Code plus the state's model electric ready and solar ready code. In practice that pushed electrical contractors to size panels, install conduit and leave capacity for future heat pumps, induction cooking, rooftop solar and EV charging in new construction.
On July 1, 2026 the standard moved up a step. The Colorado Energy Code Board published the Model Low Energy and Carbon Code on September 2, 2025, based on a modified 2024 IECC, and under HB22-1362 any municipality or county that updates its building codes after July 1, 2026 must adopt that model code or one that achieves greater efficiency and pollution reductions. Because the obligation is triggered by a local update, the energy code in force still varies from one jurisdiction to the next, and owners should ask which version their permit falls under.
The model code keeps the existing solar ready, electric ready and EV ready requirements for new construction, while allowing multifamily properties to use Level 1 EV charging spaces instead of Level 2. It adds demand response requirements, so heating, cooling, water heating and lighting systems must be able to reduce electricity use automatically when a utility signals high demand. That brings controls, communications and commissioning into the electrical scope. Larger homes face tougher targets, with homes of 7,500 square feet and above required to reach net-zero energy.
HB22-1362 also states that the National Electrical Code and the Colorado plumbing code take precedence over conflicting provisions in the energy codes, so an electrical design must satisfy the 2026 NEC first. When comparing bids, ask contractors to show how they have handled electric ready capacity, EV infrastructure and demand response controls, because those items can account for a large share of the difference between quotes.
What Colorado conditions should owners plan for when hiring an electrical contractor?
Colorado's geography spans dense Front Range cities, high mountain resort towns and large rural areas served by electric cooperatives and municipal utilities. That variety affects scheduling as much as design. A project in Denver or Aurora runs through a local building department with its own plan review queue, while a cabin or ranch outbuilding in a county without a local electrical program will be inspected by the State Electrical Board's inspectors under the statutory three-working-day standard. Ask early which authority will inspect, because it changes who you call when an inspection is missed.
Weather and terrain shape the work. Front Range hailstorms and lightning, heavy mountain snow loads, freeze-thaw cycles and wildfire exposure in the foothills all influence choices about service masts, rooftop solar attachment, surge protection and standby power. In mountain towns, ask whether equipment such as transformers, generators and breakers is listed for the installation altitude, and allow for longer lead times and travel costs when the contractor is based on the Front Range.
Utility coordination is a separate path from the permit. New services, upgrades and solar or battery interconnections in Colorado require the local utility's approval, and the utility serving a site may be an investor-owned utility, a municipal utility or a rural electric cooperative, each with its own application process and timeline. A competent Colorado electrical contractor should be able to tell you which utility serves the address and how long its service work typically takes.
Finally, vetting should be done against state records rather than marketing. Confirm the contractor's registration and the qualifying master electrician's license on DORA's license lookup, check that the license has been renewed for the cycle that began after September 30, 2026, ask for proof of workers' compensation and unemployment insurance compliance that registration requires, and make sure the permit is pulled in the registered contractor's name before work starts.
What has changed recently, or is about to change, for electrical contractors in Colorado?
Last reviewed against the primary sources listed below. Dates are effective dates unless marked otherwise.
— Scheduled: Last day the Colorado electrical board accepts renewals for the license cycle that ended September 30, 2026.
— In force: The 2026 National Electrical Code became Colorado's statewide electrical code, replacing the 2023 NEC for new submittals.
— In force: Colorado cities and counties updating building codes after this date must adopt the Model Low Energy and Carbon Code or a stronger code under HB22-1362.
— In force: The Colorado Energy Code Board published the Model Low Energy and Carbon Code, based on a modified 2024 IECC.
Where can I verify a license and check the source in Colorado?
Every figure and rule on this page can be checked against the primary source. These are the offices that publish them. Confirm current requirements directly before you rely on any of them:
Does Colorado have a statewide electrical contractor license?
Yes. Colorado handles electrical credentials at state level. Individuals are licensed by the State Electrical Board, and businesses register with the same board as electrical contractors. The registration depends on a licensed master electrician who supervises all of the company's electrical work. Cities and counties cannot demand a separate license from state-licensed electricians, although they can ask contractors to register locally without a fee.
Can I do electrical work on my own house in Colorado?
Usually, yes. A homeowner may work on their own residence without a license and can apply for the permit directly, but the work still has to be inspected. The exemption does not cover rental property, lodging, property open to the public, or homes a builder plans to sell, so landlords and investors need a registered electrical contractor.
Is the 2026 NEC enforced everywhere in Colorado?
The 2026 NEC became Colorado's statewide electrical code on August 1, 2026. Projects already in plan review before that date may be allowed to stay on the 2023 edition. Denver, for example, lets earlier submittals use the 2023 NEC as the basis of design. If your project straddles the changeover, ask the permitting office which edition applies.
How quickly will a state electrical inspector come out?
Where the State Electrical Board inspects, the statute says the inspector must visit within three working days of receiving the request. If the work fails, written reasons are due within two working days, and the contractor gets a copy. Large cities with their own programs set their own scheduling, so check the local building department's portal for timing.
What is a residential wireman in Colorado?
A residential wireman is a Colorado license limited to one-, two-, three- and four-family dwellings, and the license card is marked residential. These electricians can wire houses, duplexes and small multiplexes. They cannot work on larger apartment buildings or commercial projects. For mixed-use or commercial scopes, make sure the crew includes journeyman electricians working under a master.
How long does an electrical subcontractor have to file a lien in Colorado?
Most electrical subcontractors and suppliers have four months from their last labor or material delivery to file a lien statement. They must first serve a notice of intent at least ten days before filing. To keep the lien alive, they then have to start a foreclosure action and record notice of it within six months. Day laborers who supply no materials have a shorter, two-month window.
Do Colorado energy rules require EV charging or solar wiring?
In many places, yes. Cities and counties that updated their codes after July 1, 2023 had to include the state's electric ready and solar ready model code. The low energy and carbon code that applies to updates after July 1, 2026 keeps EV ready, solar ready and electric ready requirements and adds demand response controls. What applies to you depends on when your jurisdiction last updated its code.
