Contractors in Longmont, CO

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What the records show in Longmont

Count every licensed electrician, plumber and city-listed contractor with a local address and Longmont comes to 1,339 profiles (13th in Colorado), with ZIP 80501 home to the largest share. Roofers, general contractors and HVAC firms aren't state-licensed in Colorado, so they show up only through city license lists. 202 Longmont-based profiles appear on the lists we hold (Arvada (89), Aurora (68) and Thornton (45)), including 20 roofing licenses, 35 general contractor licenses and 17 HVAC/mechanical licenses. The roster is mostly state-licensed trades: 847 electrical licenses (135 masters, 410 journeymen, 93 residential wiremen) and 406 plumbing licenses (128 masters, 148 journeymen), all from the DORA rosters. That is the 13th-largest electrical workforce in our Colorado data.

For electrical or plumbing jobs, the business you sign with needs a contractor registration. Longmont has 79 active electrical and 52 active plumbing registrations; the other 944 individual licenses belong to workers, not firms. 35 profiles carry a state board discipline flag (26 electrical, 9 plumbing), and 24 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. Across all 1,339 profiles, 655 (49%) show an active license and 673 an expired one, close to the Colorado average.

We matched 26 Longmont companies to Colorado Secretary of State filings: 20 in good standing and 6 delinquent or dissolved. A dissolved entity can't back a warranty, so check the status before you sign. Experience runs deep: half of the licensed pros here were first licensed in 2000 or earlier, and 107 active licenses date from before 2000. 104 are new since 2024.

Profiles cluster in ZIP codes 80501 (753), 80504 (341), 80503 (197), out of 11 ZIPs on file.

Permit history: 18 Longmont-based contractors have 1,964 permits on file from City of Boulder open data, and at least 160 of the listed permits were issued in the last 12 months (latest 2026-10-14). Most permitted: Crystal Electric, Inc. (1,109), Meiers Mechanical Inc (203), Broes Electric (194). Common types: electrical permit (520), mechanical permit (159), building permit - non-residential (19). These are jobs these firms did in Boulder or Denver. Longmont doesn't publish permits in a portal we cover yet, so no permits shown doesn't mean no permits pulled.

HomeProFax profiles with a Longmont 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.

Longmont licensing rules, with sources

Local authority: City of Longmont Building Inspection. What we verified on official pages (Oct 2026):

• Longmont requires a city contractor license. Classes A, B, C and mechanical need an ICC exam, and Class D specialty contractors need insurance but no exam. (source)
• Electrical and plumbing contractors need their Colorado master and contractor licenses. (source)
• Longmont licenses renew every year. The city lists fees of $175 (A), $125 (B), $100 (C) and $75 (D, plumbing, mechanical), with no fee for electrical. (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 Longmont

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).

Longmont contractor list

1,339 profiles, ranked by HomeProFax score (top 1,091 listed; use search for others).

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Longmont contractor FAQ

How many Longmont contractors does HomeProFax track?

HomeProFax lists 1,339 contractor profiles with a Longmont business address. 655 (49%) show an active license on file and 673 show an expired one. 847 hold electrical licenses and 406 hold plumbing licenses.

Who licenses contractors in Longmont, Colorado?

City of Longmont Building Inspection handles contractor licensing for Longmont. Longmont requires a city contractor license. Classes A, B, C and mechanical need an ICC exam, and Class D specialty contractors need insurance but no exam. Electricians and plumbers also need Colorado DORA licenses.

Have any Longmont contractors been disciplined?

35 Longmont profiles carry a Colorado state board discipline flag, and 24 of those licenses are still active. Open the profile and read the board record before you hire.

Which Longmont contractors have the most permits on file?

Crystal Electric, Inc. leads with 1,109 permits. In total, 18 Longmont-based contractors have 1,964 permits on file from the Boulder and Denver open-data portals HomeProFax covers.

Can I find licensed roofers based in Longmont?

Colorado has no state roofing license, so roofers come from city license lists. 20 roofing licenses (20 active) belong to Longmont-based contractors on the Aurora, Arvada and Thornton lists HomeProFax holds.

How do I verify a contractor in Longmont 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.