Plumbing Permit in Post Falls, Idaho
VerifiedRequired for plumbing installation, alteration, or repair work in Post Falls, governed by the 2017 Idaho State Plumbing Code (ISPC) as adopted by the City. The City of Post Falls Building Division issues and inspects plumbing permits directly within city limits.
Verified 2026-07-03 · Source
When you need this permit
- Plumbing permit required for installation, alteration, or repair of any plumbing system, fixture, water heater, gas piping, or sewer/water service line
- Governed by the 2017 Idaho State Plumbing Code (ISPC) as adopted by the City of Post Falls
- Processing fee of $35.00 on all permits plus per-fixture/item unit fees
- Apply through the Community Development Portal; may be submitted alongside or after the Building Permit application
Required documents
- Required
Plumbing Permit Application
Submitted online through the Community Development Portal (postfallsid.portal.opengov.com)
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Processing fee on all permits | $35.00 | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Bar sink, bathtub including shower (each fixture) | $8.00 | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Backflow assembly (building/landscape), backwater valve, clothes washer, drain waste/vent piping alteration/replacement (each fixture), floor drain/hub drain, gas piping (each outlet), kitchen sink and/or dishwasher, lavatory, lawn sprinklers (from water connection through backflow device), mobile home w/s hookup, radiant heat (per zone), sewer ejector/sump pump, sewer service, shower, utility sink, water closet, water heater, water piping alteration/replacement (each fixture), water service, water softener | $65.00 up to 16 heads/fixtures; $4.00 per additional head/fixture (17 and up) | City of Post Falls Fee Schedule, rev 10-1-2025 (combined per-fixture unit fee table) |
| Residential Fire Sprinkler Supply from Domestic Water System | 3% of the contract price | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Commercial — up to the first $20,000.00 | 2% of the contract price | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Commercial — $20,001.00 to $100,000.00 | 1% of the contract price | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Commercial — $100,001.00 to $200,000.00 / over $200,001 | 0.5% of the contract price | City of Post Falls Fee Schedule, rev 10-1-2025 |
Review timeline
Not published
Post Falls does not publish a plan-review timeline — contact the building department for current turnaround.
Inspection process
- 1
Underground/Slab
Before concrete pour — pipe slope, materials, and cleanouts
- 2
Rough-In
After pipes are installed, before walls are closed
- 3
Final
All fixtures connected, water heater verified, cleanouts exposed, no leaks
Tips
- Post Falls uses the 2017 Idaho State Plumbing Code (ISPC), a state-amended code distinct from both the Uniform Plumbing Code and International Plumbing Code — verify fixture and venting requirements against the ISPC.
- A $35.00 processing fee applies to every plumbing permit in addition to per-fixture/item charges.
- Water heater replacement is billed under the shared per-fixture fee tier ($65.00 up to 16 heads/fixtures, or $4.00 per additional head over 16) plus the $35.00 processing fee.
Frequently asked questions
- Do I need a permit to replace a water heater in Post Falls?
- Yes. A plumbing permit is required; the $35.00 processing fee applies plus the per-fixture unit fee for the water heater. Source: City of Post Falls Fee Schedule, rev 10-1-2025.
Sources & verification
Verified against official sources. Last reviewed 2026-07-03.
- City of Post Falls Community Development Department, Building Division — official building department
- Fee Schedule (PDF) | City of Post Falls
- Current Adopted Codes and Design Criteria (PDF) | City of Post Falls
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 Post Falls building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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