Residential Plumbing Permits
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Source: Residential Plumbing Permits ↗ Last modified: Sun, 19 Apr 2026 20:00:31 GMT
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The application takes 15 minutes to complete. Permits are issued within 24 hours after payment.
When you need a plumbing permit
Work on pipes or fixtures
- Repair, replace, or move any plumbing pipes
- Add new piping to your plumbing system
- Cap pipes where a fixture was removed
- Install or replace plumbing fixtures (like toilets, sinks, showers, tubs, or dishwashers)
- Replace a water heater
Install outdoor plumbing systems
- Install rain drains or drywells
- Install or replace water service lines
- Install a backflow device for a lawn sprinkler system
- Replace a metal water line (copper or galvanized steel) with a plastic line
- ⚠️ This may also need an electrical permit ↗ and a new grounding electrode.
Handle sewage or waste systems
- Install or cap a sewer line
- Install a cesspool or septic system
Broken sewer and drain lines
- The sewer and drain lines have been in place since the house was built. When a line breaks, sewage leaks into the yard. This sewage can spread disease and may have harmful chemicals. It also creates a path for rats.
- Learn more: Broken Sewer and Drain Lines - Guide to Repairs, Permits and Inspections. ↗
Adding a new bathroom? You'll also need a building permit. Visit the residential bathroom ↗ page for more information.
You do NOT need a permit to:
- Fix or maintain existing plumbing fixtures or parts
- Replace plumbing-related items that don’t use water (like a toilet seat)
Not sure if you need a plumbing permit? Call the Residential Inspections at 503-823-7388.