Plumbing Permit in Longmont, Colorado
Required for plumbing installations, alterations, and repairs in Longmont. Plumbing contractors must hold a Colorado State Master Plumber License AND a Colorado State Plumbing Contractor License, then register with the City of Longmont for a $75 fee (Class D specialty registration).
Verified 2026-06-30 · Source
When you need this permit
- Building permit required for any changes to plumbing services
- Plumbing contractors must submit a copy of their Colorado State Master Plumber License and Colorado State Plumbing Contractor License to register with the City of Longmont
- City registration fee of $75.00 required upon application approval
- Proof of liability insurance required: $1,000,000 CSL / $2,000,000 general aggregate / $2,000,000 products-completed aggregate, naming City of Longmont as certificate holder
- Homeowners may self-perform plumbing work on their own primary residence; subcontracted plumbing work must be performed by a contractor licensed to work in Longmont
Required documents
- Req
Plumbing Permit Application (via ACA portal)
Online application through Accela Citizen Access; combination/general permits may bundle plumbing sub-permits
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Water Heater Replacement | $40.00 | City of Longmont FY2026 Fee Manual, Other Permits — Residential/Commercial table |
| Lawn Sprinklers | $30.00 | FY2026 Fee Manual |
| General Plumbing Permit (not separately listed in flat-fee table) | Based on actual contract amount of the work applied to the Primary Fee Table | FY2026 Fee Manual: 'Fees for plumbing permits, mechanical permits, electrical permits, and other miscellaneous permits and commercial work not listed above shall be based on actual contract amount of the work from the primary fee table' |
| Plan Review Fee (plumbing permit not part of a combination permit) | 50% of total permit fee | FY2026 Fee Manual, Plan Review Fees table |
| City Contractor Registration — Plumbing (Class D) | $75.00 upon application approval | FY2026 Fee Manual, Contractor License Fees table: 'Class D, Plumbing and Mechanical — $75 + $25*'; Contractor License Application confirms 'A fee of $75 is required upon application approval' for Plumbing |
Review timeline
~0–0 business days
Typical estimate — confirm current times with the Longmont building department
Inspection process
- 1
Underground / Under-slab
Before concrete pour — pipe slope, materials, cleanouts
- 2
Rough-In
After pipes installed, before walls closed
- 3
Final
All fixtures connected, no leaks, proper venting verified
Tips
- Longmont requires a $75 city registration fee for plumbing contractors, unlike electrical (no additional city fee beyond the one-time $25 sales/use tax charge for new contractors) — budget for this difference.
- Water heater replacement is a flat $40 permit — one of the least expensive permit types in Longmont's fee schedule.
- As with electrical, a Colorado State Master Plumber License and State Plumbing Contractor License are prerequisites to the City of Longmont's own contractor registration — Longmont does not operate independently of the state licensing framework.
Frequently asked questions
- Who issues plumbing permits in Longmont — the city or the State of Colorado?
- The City of Longmont's Building Services division issues and reviews plumbing permits for work inside city limits. Plumbing contractors must first hold a Colorado State Master Plumber License and Colorado State Plumbing Contractor License (via DORA), then register with the City of Longmont (Class D Plumbing registration, $75 fee) before pulling permits.
- How much does a water heater replacement permit cost in Longmont?
- A water heater replacement permit is a flat $40.00 fee per the City of Longmont FY2026 Fee Manual, Other Permits — Residential/Commercial table.
Sources & verification
Verified against official sources. Last reviewed 2026-06-30.
- City of Longmont — Building Services (Building Inspection Division), Development Services Center — official building department
- City of Longmont FY2026 Planning & Development Services Fee Manual (PDF)
- Contractor License Application — City of Longmont (PDF)
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Longmont building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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