Do You Need a Contractor’s License in Colorado?

You don’t need a statewide general contractor’s license to work in Colorado, because the state doesn’t issue one. What you almost certainly do need is a local contractor license from the city or county where the job sits, plus a state-issued credential if you’re working as a plumber, electrician, or asbestos abatement contractor. A contractor license in Colorado is really a stack of credentials: state licensing for a few regulated trades, and separate municipal licensing for general construction work.

Trades the State Licenses Directly

Three categories of work are regulated at the state level, and the rules are the same everywhere in Colorado.

Plumbers

The Colorado State Plumbing Board, inside the Department of Regulatory Agencies (DORA), issues licenses in tiers tied to experience. A residential plumber license requires 3,400 hours of practical experience, a journeyworker license requires 6,800 hours, and a master plumber license requires 8,500 hours. Anyone working in the plumbing trade without a license must be registered as an apprentice.¹

Electricians

The State Electrical Board, also under DORA, licenses residential wiremen, journeyman electricians, master electricians, apprentices, and electrical contractors.² A journeyman electrician needs four years of apprenticeship or hands-on experience, with at least two 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 through an electrical engineering degree combined with one year of practical experience.³

Asbestos Abatement

Asbestos work falls under the Colorado Department of Public Health and Environment, not DORA. Before any renovation or demolition that might disturb asbestos-containing materials, the components must be inspected by a Colorado-certified asbestos building inspector, and removal must be performed 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 General Contractor Licensing

For any work outside those three state-regulated trades, licensing happens at the city or county level. Nearly every Colorado municipality requires a contractor license before you can pull a building permit, and reciprocity between jurisdictions is minimal. A contractor working in Denver, Longmont, and Colorado Springs could need three separate licenses with three different applications and fee schedules.

A few regional bodies consolidate licensing across municipal lines. The Pikes Peak Regional Building Department, which covers the greater Colorado Springs area, requires contractors to pass an ICC exam, submit at least three verifiable project references from supervisory positions, and undergo a judicial record check.⁶ That kind of regional authority is the exception. Plan on applying separately in each city or county where you intend to take on projects.

License Classes and What They Cover

Most Colorado municipalities tier their general contractor licenses, and the naming is reasonably consistent even where the rules aren’t identical.

Class A (Unlimited) lets you build, alter, or repair any type or size of structure permitted by the adopted building code. Commercial builders and large-scale developers carry this.
Class B (Limited) covers most building types but excludes the largest construction classifications, typically Type I-A and Type II-A structures such as high-rises. It also allows 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 relevant specialty trade license.⁷⁸ Some jurisdictions add a Class D category for limited specialty trades like mechanical work.

What You Need to Apply

Checklists vary, but most local building departments ask for the same core documents:

Business entity information: legal business name, Employer Identification Number (EIN), and formation documents like articles of incorporation or organization. Sole proprietors without employees may not need an EIN, but anyone hiring workers, operating as a partnership, or forming an LLC or corporation will.⁹
General liability insurance, often with minimum coverage starting at $100,000. Higher license classes and commercial work frequently come with higher coverage requirements.
Workers’ compensation insurance. Colorado requires 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 one as a financial guarantee that work meets code. Amounts vary by locality and license class.
Personal identification, usually a Colorado driver’s license or state ID.
Proof of experience: verified project histories, employer references, or letters confirming supervisory work. Pikes Peak, for instance, 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 Process

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

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

Working on Your Own Home

Homeowners renovating their own property generally don’t need a contractor’s license, but they still need building permits for permit-triggering work. Many Colorado municipalities have a formal homeowner-builder or owner-builder category that waives the contractor license while keeping permits and inspections in place.

The exemption isn’t unlimited. Aspen’s program, which is representative of how many Colorado cities handle this, restricts owner-builders to single-family residences, limits new construction permits to one every two years, requires passing a 25-question building code test, and mandates liability insurance and workers’ compensation for any paid workers on site.¹³ Condo owners typically can’t qualify because their work can affect adjoining units. Check with your local building department before assuming you’re exempt.

Federal Rules That Still Apply

Two federal programs reach past state and local licensing and catch many Colorado contractors off guard.

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 applies to homeowners who rent out their 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

If you use subcontractors, you need to classify them correctly. The IRS looks at 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 is decisive; the IRS weighs the full picture.¹⁵ Misclassifying employees as subcontractors creates exposure for unpaid payroll taxes, back wages, and workers’ compensation violations, and it’s where enforcement agencies tend to look first during audits of construction companies.

Penalties for Working Without a License

Consequences depend on whether the work falls under a state-regulated trade or local jurisdiction licensing.

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 classification applies to unlicensed electrical work.¹⁷ Both statutes route through Colorado’s general unauthorized-practice penalty provision.¹⁸

At the municipal level, working without a required contractor license can trigger fines that vary by jurisdiction, stop-work orders that shut down your site, and denial of future permit applications. A stop-work order mid-construction hits hard financially, since you’re carrying costs on materials and labor with no progress to show for it.

Homeowners who hire unlicensed contractors take on considerable risk too. If something goes wrong, there may be little legal recourse against the contractor, and the homeowner could face personal liability for on-site injuries. Colorado’s Consumer Protection Act gives homeowners one avenue when a contractor misrepresents licensing status or engages in other deceptive trade practices, 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, DORA runs a free online lookup where you can search by name and confirm an active license.¹⁹ General contractor records are held locally, so you’ll need to contact the building department in the city or county where the work will happen. Before signing a contract, ask for the license number, verify it with the issuing jurisdiction, and confirm that insurance and bonding are current. Skipping that step is how 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
6
Pikes Peak Regional Building Department. License Application
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City of Longmont. Contractor License Types
8
City of Englewood, Colorado. Contractor License Classifications
9
Internal Revenue Service. Get an Employer Identification Number
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Colorado Division of Labor and Employment. Independent Contractors and Coverage Exemptions
11
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
18
Justia Law. Colorado Code 12-20-407 – Penalties
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Colorado Division of Professions and Occupations. Online License Verification