Contractors in Louisville, CO

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Louisville by the numbers

169: that is how many contractor and tradesperson records in our Colorado database carry a Louisville address, enough for 72nd place among the state's cities, based on state and city license records. Only 46% have an active license today, against 54% statewide, so check the expiry date on every profile you open. Because Colorado leaves roofing, general contracting and HVAC to cities, we also pull municipal license lists. Louisville firms hold 29 licenses on them (Arvada (11), Aurora (10) and Thornton (8)), among them 1 roofing license, 7 general contractor licenses and 4 HVAC/mechanical licenses.

Electricians make up the biggest group, with 102 electrical licenses (17 masters, 48 journeymen, 10 residential wiremen) and 51 plumbing licenses (13 masters, 22 journeymen). For electrical or plumbing jobs, the business you sign with needs a contractor registration. Louisville has 12 active electrical and 7 active plumbing registrations; the other 113 individual licenses belong to workers, not firms. The median first-license year is 1993. 91 records predate 2000, and 12 licenses were first issued in 2024 or later.

4 profiles carry a state board discipline flag (3 electrical, 1 plumbing), and 0 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 7 Louisville companies to Colorado Secretary of State filings: 5 in good standing and 2 delinquent or dissolved. A dissolved entity can't back a warranty, so check the status before you sign.

4,505 permits from City of Boulder and Denver open data trace back to 5 contractors based in Louisville. The leaders are Precision Plumbing Heating Cooling & Electrical, LLC (4,342), Boulder Creek Builders LLC (143), Design Mechanical Incorporated (13). The newest is dated 2026-10-08, and at least 114 were issued in the past year. Most are mechanical permit (80), new building (30), new building (29). These are jobs these firms did in Boulder or Denver. Louisville doesn't publish permits in a portal we cover yet, so no permits shown doesn't mean no permits pulled.

Permit data: City and County of Denver Open Data Catalog, licensed under CC BY 3.0. HomeProFax matched permits to licensed contractors by name; data modified from the original. Not endorsed by the City and County of Denver.

HomeProFax profiles with a Louisville 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.

Licensing in Louisville

Colorado licenses electricians and plumbers statewide through the DORA State Electrical Board and the DORA State Plumbing Board. General contractors, roofers and HVAC contractors are licensed, if at all, by the local city or county. We haven't verified Louisville's local rules yet, so check with the building department before you hire. Most Louisville ZIP codes in our data are in Boulder County, so the city or Boulder County building department is where to ask.

Hail, roofs and your contract

Louisville sits on the Front Range, in the heart of "Hail Alley." The Rocky Mountain Insurance Information Association says the region usually sees three or four catastrophic hailstorms a year, and the damaging season runs from mid-April to mid-September. After a storm, Colorado law lets you cancel an insurance-paid roofing contract within 72 hours of a written claim denial (C.R.S. 6-22-104), and a roofer may not offer to pay or waive your deductible (C.R.S. 6-22-105).

Louisville contractor list

169 profiles, ranked by HomeProFax score.

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Louisville contractor FAQ

How many Louisville contractors does HomeProFax track?

HomeProFax lists 169 contractor profiles with a Louisville business address. 78 (46%) show an active license on file and 87 show an expired one. 102 hold electrical licenses and 51 hold plumbing licenses.

Who licenses contractors in Louisville, Colorado?

Electricians and plumbers need Colorado DORA licenses everywhere in the state. For general contractors, roofers and HVAC firms, check with the Louisville or Boulder County building department, because those trades are licensed locally.

Have any Louisville contractors been disciplined?

4 Louisville profiles carry a Colorado state board discipline flag, and 0 of those licenses are still active. Open the profile and read the board record before you hire.

Which Louisville contractors have the most permits on file?

Precision Plumbing Heating Cooling & Electrical, LLC leads with 4,342 permits. In total, 5 Louisville-based contractors have 4,505 permits on file from the Boulder and Denver open-data portals HomeProFax covers.

Can I find licensed roofers based in Louisville?

Colorado has no state roofing license, so roofers come from city license lists. 1 roofing licenses (1 active) belong to Louisville-based contractors on the Aurora, Arvada and Thornton lists HomeProFax holds.

How do I verify a contractor in Louisville 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.