Contractors in Boulder, CO

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Boulder by the numbers

With 686 profiles, Boulder is the 23rd-largest contractor base in our Colorado data, 459 of them with a lapsed license. 32% of them show an active license on file, below the Colorado-wide figure of 54% for the profiles we hold. City license lists add the non-state trades: Arvada (32), Aurora (24) and Thornton (9) list Boulder-based contractors, which gives us 7 roofing licenses, 17 general contractor licenses and 8 HVAC/mechanical licenses.

State licensing boards are the main source here: we count 454 electrical licenses (76 masters, 174 journeymen, 68 residential wiremen) and 209 plumbing licenses (56 masters, 86 journeymen) in Boulder. Companies are a minority: 45 active electrical contractor and 28 active plumbing contractor registrations, against 473 individual tradespeople. The median first-license year is 1991. 408 records predate 2000, and 41 licenses were first issued in 2024 or later.

14 profiles carry a state board discipline flag (8 electrical, 6 plumbing), and 8 of those licenses are still active. A flag can mean anything from a paperwork lapse to a serious finding, so read the board record behind it. We matched 23 Boulder companies to Colorado Secretary of State filings: 13 in good standing and 10 delinquent or dissolved. A dissolved entity can't back a warranty, so check the status before you sign. Profiles cluster in ZIP codes 80302 (182), 80301 (153), 80303 (146), out of 11 ZIPs on file.

Permit history: 91 Boulder-based contractors have 21,314 permits on file from City of Boulder open data, and at least 620 of the listed permits were issued in the last 12 months (latest 2026-10-19). Most permitted: Save Home Heat Co Inc (7,595), Bernie's Plumbing and Heating, Co. (1,755), Namaste Solar Electric Inc (1,468). Common types: electrical permit (1684), mechanical permit (1107), plumbing permit (455).

HomeProFax profiles with a Boulder address, built from DORA electrical and plumbing rosters, the Aurora, Arvada and Thornton contractor license lists, Colorado Secretary of State filings and Boulder/Denver open permit data. Counts as of Oct 24, 2026.

Rather than checking each agency yourself, ask the contractor for their verified HomeProFax report. It covers license, discipline, permits and business standing in one link.

Contractor licensing in Boulder

Local authority: City of Boulder Planning and Development Services. What we verified on official pages (Oct 2026):

• Boulder requires a city contractor license for most work that needs a building or right-of-way permit, and does not accept licenses from other cities. (source)
• Boulder general contractor licenses generally need an ICC A, B or C certificate, and general liability must be at least $1M per occurrence / $2M aggregate, with the city listed as additional insured. (source)
• Boulder licenses are renewed every year through the City's Customer Self-Service portal. (source)

Electricians and plumbers are also licensed statewide by the DORA State Electrical Board and the DORA State Plumbing Board. Rules and fees change, so confirm with the department before you sign.

Storm season in Boulder

Per the RMIIA, Colorado's Front Range gets the highest frequency of large hail in North America, with three or four storms a year causing at least $25 million in insured damage. If a roofer knocks on your door after hail, two state rules apply: you can rescind an insurance-funded roofing contract within 72 hours of a written denial (C.R.S. 6-22-104), and promising to cover your deductible is illegal (C.R.S. 6-22-105).

Boulder contractor list

686 profiles, ranked by HomeProFax score.

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Boulder contractor FAQ

How many contractors are listed in Boulder, CO?

HomeProFax lists 686 contractor profiles with a Boulder business address. 222 (32%) show an active license on file and 459 show an expired one. 454 hold electrical licenses and 209 hold plumbing licenses.

Who licenses contractors in Boulder, Colorado?

City of Boulder Planning and Development Services handles contractor licensing for Boulder. Boulder requires a city contractor license for most work that needs a building or right-of-way permit, and does not accept licenses from other cities. Electricians and plumbers also need Colorado DORA licenses.

Have any Boulder contractors been disciplined?

14 Boulder profiles carry a Colorado state board discipline flag, and 8 of those licenses are still active. Open the profile and read the board record before you hire.

Which Boulder contractors have the most permits on file?

Save Home Heat Co Inc leads with 7,595 permits. In total, 91 Boulder-based contractors have 21,314 permits on file from the Boulder and Denver open-data portals HomeProFax covers.

Can I find licensed roofers based in Boulder?

Colorado has no state roofing license, so roofers come from city license lists. 7 roofing licenses (7 active) belong to Boulder-based contractors on the Aurora, Arvada and Thornton lists HomeProFax holds.

How do I verify a contractor in Boulder quickly?

Ask the contractor for their verified HomeProFax report. It puts their license status, any board discipline, permits on file and Secretary of State standing on one page with sources. You can also search any business free on HomeProFax.com.