How to Get a Plumbing Work Permit in Denver, CO (2026 Guide)
Everything you need to know about plumbing work permits in Denver, CO, local requirements, fees, timelines, and how to apply.
By Joey, Founder · Last updated May 23, 2026 · How we research →
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Free Permit Lookup →Do You Need a Plumbing Work Permit in Denver?
Based on Denver's local building codes, you'll need a permit when:
Adding a fixture requires a permit in Denver, CO.
Rerouting plumbing requires a permit in Denver, CO.
Water heater replacement requires a permit in Denver, CO. High altitude affects gas appliance sizing.
These plumbing work projects are typically exempt in Denver:
Replacing a fixture in-kind does not require a permit in Denver, CO.
Permit Fees in Denver
Based on local Denver permit data, fees for plumbing work projects typically range:
Here's how fees break down by project scope nationally:
| Project Scope | Typical Permit Fee |
|---|---|
| Water heater replacement | $50 – $200 |
| Single fixture addition or relocation | $75 – $300 |
| Adding a bathroom | $150 – $500 |
| Gas line installation | $75 – $300 |
| Whole-house repipe | $200 – $500+ |
| Sewer line repair/replacement | $150 – $500+ |
Fees are typically calculated based on estimated project value. Contact Community Planning and Development (CPD) for exact amounts.
How Long Does It Take?
In Denver, typical approval time for plumbing work permits is about 2 weeks.
More complex projects requiring structural review or variances may take longer. Simple projects may qualify for expedited or over-the-counter review in some cases.
How to Apply for a Plumbing Work Permit in Denver
- 1 Check requirements: Use our free lookup tool or contact Community Planning and Development (CPD) to confirm your project needs a permit.
- 2 Gather documents: Prepare your application, site plan, construction drawings, and any other required documents.
- 3 Submit online: Denver accepts applications online at Community Planning and Development (CPD).
- 4 Pay fees: Pay the applicable permit fees ($50 – $400).
- 5 Wait for approval: Your application will be reviewed by Denver plan reviewers. Typical turnaround is about 2 weeks.
- 6 Begin work: Once approved, post your permit visibly at the job site before starting work.
- 7 Schedule inspections: Call Community Planning and Development (CPD) at (720) 865-2700 to schedule required inspections at each phase of the project.
Denver Building Department Contact
Required Inspections in Denver
Most plumbing work projects in Denver require inspections at each construction stage:
Rough-In Plumbing Inspection, Pipe sizes and materials correct, drain slope (1/4 inch per foot for pipes under 3 inches), vent routing and distances per IRC Table P3105.1, cleanout placement, pipe support and hangers, firestopping at penetrations. Supply lines pressure-tested at 50 PSI minimum for 15 minutes. DWV system water-tested (filled to 10 feet above highest fitting, held 15 minutes). Gas piping tested at 3 PSI for 10 minutes.
Shower Pan / Liner Test (if applicable), Pan filled with water to the threshold height, held for 15 minutes minimum with no leaking. Liner properly installed and turned up walls. Drain connection sealed.
Final Plumbing Inspection, Every fixture drains properly, all traps filled with water, no leaks at any connections, gas connections leak-tested (if applicable), water heater installation complete and correct (T&P valve, expansion tank, venting, strapping), backflow prevention devices in place, and hose bibb vacuum breakers on all exterior faucets.
Schedule inspections with Community Planning and Development (CPD) at (720) 865-2700 at least 24–48 hours in advance.
Frequently Asked Questions
Whether you need a permit depends on the size and scope of your plumbing work project. In Denver, some smaller projects are exempt while larger ones require a permit. Use our free lookup tool to check your specific situation.
Permit fees for plumbing work projects in Denver typically range from $50 – $400. Fees are usually based on the estimated project value.
Typical approval time in Denver is about 2 weeks. Complex projects requiring structural review may take longer.
In most cases, homeowners in Denver can pull permits and perform work on their own primary residence as an owner-builder. You're still responsible for meeting all code requirements and passing inspections.
Working without a required permit in Denver can result in fines, stop-work orders, required removal of completed work, and complications when selling your home.
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Free Permit Lookup →Other Permit Guides for Denver, CO
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Plumbing Work Permits in Nearby Cities
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See Detailed Plumbing Work Rules for Denver
View all local rules, exemptions, and fee details on the permit page.
Plumbing Work Permit Rules →