Do You Need a Contractor’s License in Colorado?

Colorado does not issue a statewide general contractor’s license, so whether you need a contractor license in Colorado depends on your trade and your location. Plumbers, electricians, and asbestos abatement workers must hold state-issued credentials no matter where they work. Everyone else — general contractors, remodelers, framers, roofers — gets licensed by the city or county where the job sits, and most Colorado municipalities require that license before you can pull a building permit.

Trades Licensed by the State

Three categories of work are regulated at the state level rather than left to local building departments.

Plumbers

The Colorado State Plumbing Board, housed within the Department of Regulatory Agencies (DORA), issues licenses in tiers based on hands-on experience. A residential plumber license requires two years (3,400 hours) of practical experience, a journeyworker license requires four years (6,800 hours), and a master plumber license requires five years (8,500 hours). Anyone doing plumbing work in Colorado without one of these licenses must be registered as an apprentice.¹

Electricians

The State Electrical Board, also under DORA, licenses electricians, apprentices, and electrical contractors.² A residential wireman needs two years of training or practical experience wiring one- to four-family dwellings. A journeyman electrician needs four years of apprenticeship or hands-on experience, with at least two of those years in commercial or industrial work, plus 288 hours of classroom training in safety and the National Electrical Code. Master electricians need supervisory experience beyond the journeyman level, or can qualify with an electrical engineering degree combined with one year of practical experience.³

Asbestos Abatement

Asbestos work sits with the Colorado Department of Public Health and Environment (CDPHE), not DORA. Before any renovation or demolition that could disturb asbestos-containing materials, a Colorado-certified asbestos building inspector must inspect the components, and removal has to be done by a certified General Abatement Contractor.⁴ Initial certification for a General Abatement Contractor costs $2,000, with annual renewals at $1,000. Individual worker certifications run from $125 to $275 depending on the role.⁵

Local Licensing for General Contractors

Everything outside those three trades falls to the city or county. That means requirements shift with the map. A contractor working in Denver, Longmont, and Colorado Springs could need three separate licenses, three applications, and three fee schedules, and there is little reciprocity between jurisdictions.

Some regions consolidate. The Pikes Peak Regional Building Department covers the greater Colorado Springs area and requires contractors to pass an ICC exam, submit at least three verifiable project references from supervisory positions, and pass a judicial record check.⁶ That kind of regional body is the exception. Plan on applying separately in each city or county where you intend to take on work.

License Classes and What They Cover

Most Colorado municipalities divide general contractor licenses into tiers that limit the size and type of construction you can perform. The names are fairly consistent across jurisdictions, even where the specific rules are not.

Class A (Unlimited): Build, alter, or repair any type or size of building or structure permitted by the adopted building code. Commercial builders and large-scale developers carry this one.
Class B (Limited): Covers most building types but excludes the largest classifications (typically Type I-A and Type II-A structures such as high-rises). Also permits non-structural interior remodeling of any building type.
Class C (Residential): Limits you to one- and two-family dwellings and townhouses of three stories or fewer, plus accessory buildings like detached garages.

All three classes typically exclude plumbing, electrical, and mechanical work unless you also hold the matching trade license.⁷⁸ Some jurisdictions add a Class D category for limited specialty trades like mechanical work.

What You Need to Apply

The exact checklist varies by jurisdiction, but most local building departments ask for the same core items:

Business entity information. Legal business name, Employer Identification Number (EIN), and formation documents such as articles of incorporation or organization. Sole proprietors without employees may not need an EIN, but any contractor who hires workers, operates as a partnership, or forms an LLC or corporation will.⁹
General liability insurance. Most jurisdictions require a minimum policy, often starting at $100,000, though some require significantly more. Higher license classes and commercial work usually carry higher coverage requirements.
Workers’ compensation insurance. Colorado requires workers’ compensation coverage for all employers, including construction sole proprietors and partnerships. If you have no employees, you must either carry coverage for yourself or formally reject it in writing.¹⁰
Surety bond. Some jurisdictions require a bond as a financial guarantee that work will meet code. Amounts vary by locality and license class.
Personal identification. A Colorado driver’s license or state ID.
Proof of experience. Verified project histories, employer references, or letters confirming supervisory work. Pikes Peak, for example, requires at least three permitted and verifiable projects where you held a supervisory position.⁶
Exam results. Many localities require passing an International Code Council (ICC) exam covering building codes and construction standards.¹¹

Fees and Processing

Applications go through online portals, in person at city or county building departments, or by mail depending on the jurisdiction. After submission the building department reviews your documents, verifies experience and references, and confirms your insurance and bonding. Some jurisdictions add interviews or background checks.

Fees range widely. Application and licensing fees across Colorado jurisdictions typically fall between $50 and $250, depending on class and municipality. Longmont charges $75 for a Class D specialty license and up to $175 for a Class A unlimited license.¹² Englewood’s Class A license is $225 and its Class C residential license is $100.⁸ The Pikes Peak Regional Building Department charges a $50 non-refundable application fee.⁶ These fees are generally non-refundable whether or not your application is approved.

Homeowners Working on Their Own Property

Homeowners renovating their own house generally do not need a contractor’s license, though they still need building permits for any work that requires them. Many Colorado municipalities have a formal homeowner-builder or owner-builder category that waives contractor licensing while keeping permit and inspection obligations in place.

The exemption has limits. Aspen’s program, which is representative of how many cities handle this, restricts owner-builders to single-family residences, caps new construction permits at one every two years, requires passing a building code test, and mandates liability insurance and workers’ compensation for any paid workers on site.¹³ Condo owners typically cannot qualify because their work can affect adjoining units. Check with your local building department before assuming you are exempt.

Federal Rules That Still Apply

Two federal programs catch many Colorado contractors off guard even when their state and local licensing is in order.

Lead Paint Renovation

The EPA’s Renovation, Repair and Painting (RRP) rule requires lead-safe certification for any contractor working on homes, child care facilities, or preschools built before 1978 if the project disturbs lead-based paint. The rule also reaches homeowners who rent out property, run a child care center in their home, or flip houses for profit. It does not apply to homeowners renovating their own primary residence for personal use.¹⁴

Worker Classification

Construction businesses that use subcontractors have to classify workers correctly. The IRS evaluates independent contractor status against three categories: behavioral control (whether you direct how the work gets done), financial control (who provides tools, how payment is structured, whether expenses are reimbursed), and the nature of the relationship (written contracts, benefits, permanence). No single factor decides it, and the IRS weighs the full picture.¹⁵ Misclassifying employees as subcontractors creates exposure for unpaid payroll taxes, back wages, and workers’ compensation violations, and this is where enforcement agencies tend to look first during audits of construction companies.

Penalties for Working Without a License

Consequences split along the same line as licensing: state-regulated trades on one side, local jurisdictions on the other.

Performing plumbing work without an active Colorado license is a Class 2 misdemeanor, carrying up to 120 days in jail and a fine of up to $750.¹⁶ The same penalty applies to unlicensed electrical work.¹⁷ Both statutes route through Colorado’s general unauthorized-practice penalty provision.¹⁸ Before March 2022, repeat offenses could escalate to a Class 6 felony; legislative changes removed that escalation.

At the municipal level, working without a required contractor license can trigger fines that vary by jurisdiction, stop-work orders that shut down your job site, and denial of future permit applications. A stop-work order mid-project is expensive fast, since you keep paying carrying costs on materials and labor with no progress to show.

Homeowners who hire unlicensed contractors take on real risk too. If something goes wrong there may be little practical recourse against the contractor, and the homeowner could face personal liability for injuries on site. Colorado’s Consumer Protection Act offers one avenue for homeowners harmed by deceptive trade practices, including contractors who misrepresent their licensing status, and successful bad-faith claims can result in treble damages.

How to Verify a Contractor’s License

For state-licensed trades like plumbing and electrical work, DORA maintains a free online lookup where you can search by name to confirm an active license.¹⁹ For general contractor licenses you have to contact the building department in the specific city or county where the work will happen, because those records are kept locally. Before signing a contract, ask for the contractor’s license number, verify it with the issuing jurisdiction, and confirm that insurance and bonding are current. Skipping that step is where most disputes with unlicensed contractors start.

1
Divisions of Professions and Occupations. Plumbing – Applications and Forms
2
Divisions of Professions and Occupations. Colorado Electrical Board
3
Justia Law. Colorado Code 12-115-110 – Qualifications for Licensure
4
Colorado Department of Public Health and Environment. Asbestos Support and Guidance – Renovation, Demolition, and Certification
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Colorado Department of Public Health and Environment. Payment Portal
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Pikes Peak Regional Building Department. License Application
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City of Longmont. Contractor License Types
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City of Englewood, Colorado. Contractor License Classifications
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Internal Revenue Service. Get an Employer Identification Number
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Colorado Division of Labor and Employment. Independent Contractors and Coverage Exemptions
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International Code Council. Contractor/Trades Examination Program
12
City of Longmont. Contractor License Fees
13
City of Aspen. Homeowner/Builder Licensing
14
US EPA. Lead Renovation, Repair and Painting Program
15
Internal Revenue Service. Independent Contractor (Self-Employed) or Employee?
16
Justia Law. Colorado Code 12-155-122 – Unauthorized Practice – Penalties
17
Justia Law. Colorado Code 12-115-123 – Unauthorized Practice – Penalties
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Justia Law. Colorado Code 12-20-407 – Penalties
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Colorado Division of Professions and Occupations. Online License Verification