Colorado Contractor Licensing: Essential Requirements and Insurance Guidelines
Colorado does not issue a state-level general contractor license. Licensing is handled entirely at the local level, by individual cities and counties, so the rules in Denver are different from those in Fort Collins, Boulder, or Larimer County. If your project requires a building permit, you almost certainly need a local license before you can pull one.
For statewide oversight and guidance on which trades fall under state-level regulation, contact the Colorado Department of Regulatory Agencies (DORA):
- Phone: (303) 894-7855
- Address: 1560 Broadway, Suite 110, Denver, CO 80202
- Website: dora.colorado.gov
DORA does not issue general contractor licenses directly. It oversees electrical and plumbing licensing statewide and can help you identify the right local authority for general contracting work.
Need contractor insurance in Colorado before you apply? Call Contractors Liability® at (888) 766-4991 or email info@contractorsliability.com for a fast quote.
Types of General Contractor Licenses in Colorado
Most Colorado jurisdictions use a three-class license structure based on International Code Council (ICC) classifications:
Class A covers construction, alteration, repair, demolition, or rebuilding of any type or size of structure. Specialized trade work like plumbing or electrical requires separate licenses.
Class B covers commercial buildings up to two stories and most residential structures. Certain high-risk structures and specialized trades require additional licensing.
Class C is limited to detached one- and two-family dwellings, townhomes, and accessory structures up to two stories. Any trade-specific work requires its own license.
How to Get a General Contractor License in Colorado
Because licensing is local, the exact process varies. That said, most jurisdictions in Colorado follow a similar path:
Basic eligibility: You must be at least 18 years old, a U.S. citizen or legal resident, and able to document the required experience for your license class. Denver, for example, requires Class A applicants to show at least seven years of verified experience in commercial building construction.
Exams: Starting in early 2025, new and renewing applicants for a Colorado contractor’s license need to provide proof of passing the International Code Council (ICC) exam. This requirement applies to Class A, B, and C licenses. Some jurisdictions, including Denver, also require a local exam on city-specific building codes.
Application: Submit your application, business registration documentation, proof of experience, exam results, and insurance certificates to the local licensing authority. Fees vary by city and county, ranging from around $100 to several hundred dollars depending on the license class, renewal cycle, and any additional costs for exams, insurance, or bonding.
No reciprocity: Very few municipalities allow for licensing reciprocity, meaning contractors will have to take and pass an exam and pay fees for every city they work in. A license from another state does not transfer.
License Renewal
In Colorado, contractors must renew their licenses every 2 years. Renewal requires completing at least eight hours of continuing education every two years. Renewal also involves a fee and proof of current insurance. Unresolved code violations can block renewal.
2026 Building Code Updates
As of December 31, 2025, the City and County of Denver adopted the 2025 Building and Fire Codes, incorporating the 2024 I-codes, making these effective for projects in 2026. Cities like Thornton have also adopted the 2024 ICC Codes and the 2023 National Electrical Code, with local amendments, effective July 1, 2025. If you work across multiple jurisdictions, verify the active code version with each local building department before starting a project.
Insurance Requirements for Colorado Contractors
Colorado contractors need several types of insurance to obtain a license and remain compliant. Requirements vary by city and county, but most jurisdictions require the following:
General Liability Insurance
Coverage minimums vary by locality. Larimer County requires a minimum of $300,000 per occurrence for general contractors. Boulder requires $1,000,000 per occurrence and $2,000,000 aggregate. Douglas County requires a minimum of $500,000. Many Front Range commercial contracts require $2,000,000 per occurrence. Check with your local building department for the specific threshold in your area.
Workers’ Compensation Insurance
Required for any contractor with one or more employees. It covers medical expenses and lost wages when a worker is injured or becomes ill on the job. The average cost of workers’ compensation insurance for contractors in Colorado is $0.95 per $100 in earnings, but it can vary depending on the type of work and the size and scope of your business.
Commercial Auto Insurance
Required if your business owns vehicles. Work truck and van coverage in Colorado typically runs $1,800 to $3,500 per vehicle annually for most contractor operations.
Tools and Equipment Insurance
Covers repair or replacement costs for tools and equipment used on job sites. Most Colorado contractors pay $300 to $1,200 per year depending on total equipment value. Tool replacement costs have increased sharply across all trades in recent years.
Commercial Property Insurance
Protects your business property against damage from theft, vandalism, or other covered events.
See the Official Document:
Denver’s Licensing Requirements
Denver has some of the strictest contractor licensing requirements in Colorado.
Contact:
- Email: Contr.Licensing@denvergov.org
- Phone: (720) 865-2770
- Office Hours: Monday through Thursday, 8 a.m. to 4 p.m., 2nd floor, 201 W. Colfax Ave., Denver
Denver requires contractors to obtain a Supervisor Certificate, a city-specific credential that confirms they have the experience and knowledge to oversee projects locally. Applicants must submit proof of passing the ICC exam and, in some cases, pass a separate exam covering Denver-specific building codes. General contractors working in Denver must also carry a minimum of $50,000 in a surety bond.
Frequently Asked Questions (FAQ)
These are common questions about General Contractor License in Colorado.
No, Colorado does not require a state-level license for general contractors. However, most cities and counties have their own licensing requirements that you must meet.
General contractors in Colorado typically need General Liability Insurance, Workers’ Compensation Insurance (if they have employees), Commercial Auto Insurance (if using company vehicles), Tools and Equipment Insurance, and Commercial Property Insurance.
The licensing process is handled locally. Contact the city or county where you plan to work to obtain the specific application forms and requirements.
Liability insurance coverage typically starts at $100,000, but higher limits may be required depending on the location and scope of the project. For example, Larimer County requires $1 million in coverage for Class A and B licenses.
Yes, Denver has stricter requirements, including the need for a Supervisor Certificate, additional documentation, and possibly passing a local exam in addition to the ICC exam.
Most general contractor licenses in Colorado need to be renewed every 1 to 3 years, depending on the local jurisdiction.
