Plumbing contractors in
Denver, Colorado.
A public directory of licensed plumbing contractors serving greater Denver. Market data, licensing requirements, and cost benchmarks — updated continuously from public sources.
Common Job Costs
Licensing Requirements
Licensing Requirements
Colorado requires plumber-restricted license through Department of Regulatory Agencies (DORA). Must complete 4-year apprenticeship or equivalent experience, pass written exam covering Colorado Plumbing Code and IPC. Journeyman license requires 8,000 hours experience. Master plumber needs additional 4 years experience and separate exam. Renewal every 3 years with 24 hours continuing education.
Permit Requirements
Denver requires permits for water heater replacement, new fixtures, gas line work, and any work requiring opening walls. Permit fees range $50-200. Homeowner permits allowed for basic repairs, but licensed contractor required for new installations and gas work.
Inspection Schedule
Rough-in inspection before covering work, final inspection after completion. Water heater installations require inspection within 24 hours. Gas line work requires pressure testing with inspector present.
Insurance Minimums
Colorado requires $50,000 general liability minimum for licensed plumbers. Denver municipal work requires $1 million liability coverage. Workers compensation required if employing others.
How to Get Licensed
Complete education requirements
Finish high school or GED, then complete 4-year plumbing apprenticeship program through registered sponsor, or equivalent combination of experience and technical education totaling 8,000 hours.
Gather documentation
Collect proof of completed apprenticeship or experience verification, official transcripts from any technical programs, and valid government-issued photo identification.
Submit application
Complete plumber-restricted license application through Colorado DORA website, pay $300 application fee, and submit all required documentation for review.
Schedule and pass examination
Once application is approved, schedule written exam covering Colorado Plumbing Code, International Plumbing Code, and state regulations. Pay $200 exam fee and achieve passing score of 70%.
Receive license and maintain
Upon passing exam, receive license certificate valid for 3 years. Complete 24 hours continuing education before each renewal and pay $300 renewal fee every 3 years.
About This Market
Denver's plumber market serves 715,000 residents across a metro that's adding 30,000 people yearly. With 2,528 licensed plumbing establishments statewide, competition is steady but work volume stays strong due to aging infrastructure, new construction, and altitude-related pipe stress from freeze-thaw cycles. High-end neighborhoods like Cherry Creek and LoDo drive premium pricing, while suburban tract housing keeps volume repair work steady. Winter emergency calls for frozen pipes and furnace issues can triple normal rates. Getting licensed in Colorado takes commitment - the 4-year apprenticeship requirement and comprehensive exam weed out casual players. Denver's permit process is straightforward but inspections are thorough, especially on gas work. The altitude affects everything from boiler efficiency to pipe expansion, so learn the local quirks. Peak season runs October through March when heating systems fail and pipes freeze. Smart contractors stock pipe heaters and know the emergency call premium. Build relationships with HVAC contractors and general contractors doing kitchen remodels - that's where the steady money comes from.
- Licensed establishments in COUS Census Bureau County Business Patterns
- Licensing requirements and feesColorado Department of Regulatory Agencies (DORA)
- Permit requirements and costsDenver Department of Community Planning and Development
- Insurance minimumsColorado Division of Insurance
- Cost rangesLocal market estimates based on contractor surveys
Frequently Asked Questions
How much does a plumber license cost in Colorado?
Initial plumber-restricted license costs $300 application fee plus $200 examination fee. Renewal every 3 years costs $300. Additional costs include required continuing education courses, typically $200-400 per renewal period according to Colorado DORA.
Do I need a permit to replace a water heater in Denver?
Yes, Denver requires permits for water heater replacement. Permit costs $75-125 depending on unit type. Installation must be inspected within 24 hours of completion per Denver Building Department requirements.
What's the average cost to clear a main sewer line in Denver?
Main sewer line cleaning ranges $150-400 for basic snaking, $3000-8000 for full line replacement. Denver's clay pipe infrastructure from 1950s-70s frequently requires replacement rather than repair, driving higher average costs.
How long does Colorado plumber apprenticeship take?
Colorado requires 4-year apprenticeship totaling 8,000 hours of supervised work experience. Alternatively, equivalent experience plus technical education can substitute, but must be verified by Colorado Department of Regulatory Agencies.
Can homeowners do their own plumbing work in Denver?
Homeowners can obtain permits for basic repairs and fixture replacement in their primary residence. However, gas line work, main line connections, and commercial properties require licensed plumber per Denver municipal code.
Plumbing contractors in Denver
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