Quick answer
These guides cover what plumbing work costs in Denver (Angi's 2026 data puts the average job at about $374), how to verify a Colorado plumber license, how to prevent frozen pipes between Denver's average first freeze on October 7 and last freeze on May 5, boiler care and how expansive clay soil damages slabs and sewer lines.
Updated · By the Denver Plumber Pros editorial team · How we research
What you will find here
Each guide answers one question in depth. We cite official sources, such as the National Weather Service, the Colorado Geological Survey, Denver Water, ENERGY STAR and city permit offices, and we label cost figures with the survey and year they come from. Nothing here is a quote or a promise of price; your contractor's written estimate is what counts.
The guides
How much does a plumber cost in Denver?
Published 2026 price ranges for service calls, drain clearing, water heaters, sewer work and slab leaks, plus how to read a quote and avoid paying for the wrong repair.
How to choose a plumber in Denver
How Colorado and metro cities license plumbers, how to look a license up, what the FTC and BBB say to check, and what a written contract should include.
How to prevent frozen pipes in a Denver winter
Denver's freeze season by the numbers, where pipes freeze first, what Denver Water and the Red Cross recommend, and how to thaw a pipe safely.
Boiler and radiant heat maintenance in Denver
What a yearly boiler service should cover, efficiency ratings explained, carbon monoxide alarm rules in Colorado and when repair stops making sense.
Expansive soil and slab leaks in Denver
How Front Range swelling clay moves foundations and pipes, the warning signs of a slab leak and the repair methods and cost ranges you are likely to be quoted.
Quick reference: Denver plumbing numbers
| Fact | Figure | Source |
|---|---|---|
| Average Denver plumbing job | About $374; typical $203 to $544 | Angi, 2026 |
| Average first fall freeze in Denver | October 7 | NWS Boulder |
| Average last spring freeze in Denver | May 5 | NWS Boulder |
| Swelling clay volume change when wet | 10 percent or more | Colorado Geological Survey |
| ENERGY STAR gas boiler efficiency | 90 percent AFUE | ENERGY STAR |
Where should you start?
Pick the guide that matches your situation:
- You have a quote and want to know if it is fair: read the cost guide first, then compare the scope line by line using its checklist.
- You need to hire someone soon: the hiring guide shows how to check a Colorado license in a couple of minutes and which city licenses to ask about.
- It is fall, or a cold snap is coming: the frozen pipe checklist covers hoses, sprinkler lines, insulation and what to do if a pipe freezes.
- Your home has radiators or in-floor heat: the boiler guide explains annual service and carbon monoxide safety.
- You see new cracks, sticking doors or a rising water bill: the expansive soil guide explains how ground movement can damage slabs and sewer lines, and how slab leaks are found and fixed.
If water is actively leaking, skip the reading: shut off the main valve and see the emergency plumber guide.
Looking for something city-specific?
Permit rules, water providers and rebates vary across the metro. Our city guides cover Arvada, Aurora, Centennial, Lakewood, Littleton, Parker, Thornton and Westminster. For explanations of specific jobs, see the services overview.
How we keep these guides accurate
We open every source we cite and link it inline so you can check it. When a figure is an estimate from a cost guide, we say so and give the year. If we could not verify something, we leave it out. If you spot an outdated rule or a broken link, let us know through the contact page.
- Official sources first: state agencies, city permit offices, utilities and federal agencies.
- Cost data only from established cost guides, labeled with publisher and year.
- No invented reviews, testimonials or statistics.
Who writes this site
This is an independent homeowner guide. We are not a contractor and do not perform plumbing work. If you want help with a specific problem, you can email us a request; we reply with next steps and, where a licensed local contractor is available, an introduction. Read more about this site.
Frequently asked questions
Are the prices in these guides quotes?
No. Cost figures come from published cost surveys such as Angi and HomeGuide and are labeled with the publisher and year. They show typical ranges, not a price any contractor has agreed to. Your actual cost depends on the job, access, materials and permits, so always get a written estimate.
How often are these plumbing guides updated?
We review the guides when a cited source changes, such as a new cost survey year, a city permit list update or a change to a utility rebate. Each figure links to its source, so you can check the current version yourself. Report anything outdated through the contact page.
Do these guides apply outside Denver?
The hiring, frozen pipe, boiler and soil guides apply across the Front Range, since state licensing and the climate are shared. Permit rules and rebates are local, so check the city guide for your area or your city's building division before starting work.
Sources
Independent homeowner guide operated by SWKM GmbH. Not a licensed contractor. We do not perform plumbing work. More about this site.