Do you need a permit for plumbing work?
Yes, most plumbing work that involves new pipes, rerouting supply or drain lines, or adding fixtures requires a plumbing permit.
$50 - $500
Typical permit cost
Same day - 2 weeks
Approval timeline
6 steps
Permit process
When a permit is required
- Adding new plumbing fixtures (toilet, sink, shower, tub)
- Rerouting water supply or drain lines
- Installing or replacing a water heater
- Connecting a new dishwasher, washing machine, or ice maker line
- Replacing sewer or water main lines
- Installing a backflow prevention device
When you might not need one
- Fixing a leaky faucet or replacing washers
- Unclogging a drain
- Replacing a toilet in the same location with no changes to plumbing
- Replacing a showerhead or faucet
- Minor repairs that do not alter the plumbing system
How to get a plumbing work permit
Follow these steps to apply for and obtain your permit.
Determine the scope of plumbing work and whether supply, drain, or both are affected
Contact your local building department or visit their website for permit requirements
Submit a plumbing permit application with a description of the work
Pay the permit fee
Complete rough-in plumbing and schedule an inspection before closing walls
Complete finish plumbing and schedule a final inspection
How much does a plumbing work permit cost?
$50 - $500
Typical range across US municipalities
Plumbing permits are usually based on the number of fixtures being added or modified. Simple fixture additions cost $50-$100. New bathroom rough-ins may cost $200-$500.
What happens if you skip the permit?
Skipping a required permit can carry real financial and legal consequences.
Water damage from improper plumbing connections can cost thousands to repair
Fines from the building department
Contaminated water supply from improper cross-connections
Sewer gas leaks from improperly vented drain lines
Issues during home sale: unpermitted plumbing is a common inspection flag
DIY or hire a pro?
Doing it yourself
- Simple repairs like fixing a leaky faucet or replacing a showerhead are DIY-friendly
- Some homeowners can handle minor fixture replacements
- Always check if your jurisdiction allows homeowners to pull plumbing permits
Hiring a professional
- Licensed plumbers are required for most new plumbing installations
- Professionals understand local plumbing codes and venting requirements
- Incorrect plumbing can cause flooding, contamination, and sewer gas issues
- Plumbers handle the permit and inspection process
Our recommendation
Minor repairs are DIY-friendly, but any work involving new pipes, fixtures, or drain/vent modifications should be done by a licensed plumber with proper permits.
Frequently asked questions
Do I need a permit for plumbing work?
Yes, most plumbing work requires a permit, including adding fixtures, rerouting pipes, and replacing water heaters. Simple repairs like fixing leaks and replacing faucets are typically exempt. Your local building department determines exactly which work requires a permit.
How much does a plumbing permit cost?
Plumbing permits typically cost between $50 and $500, depending on the scope of work. A simple fixture addition permit may cost $50-$100, while a full bathroom rough-in can cost $200-$500.
Do I need a permit to replace a toilet?
In most jurisdictions, replacing a toilet in the same location does not require a permit. However, if you are moving the toilet to a new location or adding a new toilet where one did not exist, you will need a plumbing permit.
Can I do my own plumbing without a license?
Some jurisdictions allow homeowners to perform plumbing work on their own primary residence with a homeowner plumbing permit. The work must still meet code and pass inspection. Many areas require a licensed plumber for any work beyond basic repairs.
Find licensed plumbers who handle permits
Skip the permit headache. Licensed plumbers in your area pull permits, schedule inspections, and keep the job up to code.