Quick facts: Colorado requirements
- State GC license
- None - general contractor licensing is set locally, city by city
- State-licensed trades
- Plumbing and electrical, through the Division of Professions and Occupations
Fees, insurance minimums, and rules change, and vary substantially by locality here. Verify every item with the responsible local agency before you rely on it.
Colorado is another state that leaves general contractor licensing to cities and counties - what you need depends entirely on where the job site is.
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What starting a Colorado contracting business actually involves
There is no statewide general contractor license. General building contracting is licensed at the city and county level in Colorado, which means the classifications, fees, and even whether a license is required at all depend on your specific work location. A handful of specific trades - plumbing and electrical among them - are licensed at the state level through the Division of Professions and Occupations, but general contracting itself is not.
Boulder is a working example of how detailed local licensing gets. Boulder runs a multi-tier building contractor classification system, Classes A through G, sorted by project scope, plus separate license categories for electrical, plumbing, mechanical, fire, sign, tree, and right-of-way work. Contractors need at least $1,000,000 per occurrence in general liability insurance, workers' compensation as required by Colorado law, and the city listed as additional insured on the policy.
Local licenses generally don't transfer between jurisdictions. Boulder explicitly does not accept reciprocal licenses from other cities - a license that's valid in one Colorado municipality carries no automatic weight in the next one over. If you plan to work across multiple cities or counties, expect to apply separately in each one.
Where people get stuck
The mistake is assuming a license from your home city covers a job somewhere else in Colorado. Because there's no statewide reciprocity and no state general contractor license to fall back on, every new jurisdiction you work in is a separate licensing check - confirm the local requirement before you bid a job outside your home city or county.
Not sure what your city or county requires? Contractor Lane sorts it out with you.
Where Contractor Lane comes in
Contractor Lane helps you identify which local licensing office actually governs your work area, and gets your insurance minimums lined up before you take a job in a new jurisdiction.
Build your free roadmap to get the sequence for your specific trade and target project size.
General educational information for people starting a business in Colorado. Requirements and fees change, and vary substantially by city and county here. Contractor Lane is not a law firm or tax advisor.
Common questions
Does Colorado require a general contractor license?
No statewide general contractor license exists in Colorado. General building contracting is licensed at the city and county level, so requirements, classifications, and fees vary depending on where you work. A handful of specific trades, like plumbing and electrical, are licensed at the state level through the Division of Professions and Occupations. Source: Colorado Division of Professions and Occupations.
What does local contractor licensing look like in Colorado - using Boulder as an example?
Boulder licenses building contractors across multiple classifications (Classes A through G, varying by project scope) plus separate electrical, plumbing, mechanical, fire, sign, tree, and right-of-way categories. Contractors need at least $1,000,000 per occurrence in general liability insurance and workers' compensation as required by Colorado law, with the city listed as additional insured. Boulder does not accept reciprocal licenses from other jurisdictions, so a license from a neighboring city does not carry over. Source: City of Boulder, Contractor Licensing.