Do I need a plumbing permit in Nashville? Metro's rules for fixtures, meters and backflow

What Metro's list says

From Metro Codes' list of projects that may or may not require a permit and the renovation page (read 23 October 2026), one- and two-family homes:

Moving or adding a fixture is the trigger; swapping an appliance on existing connections is not. A bathroom or kitchen remodel that moves fixtures usually needs a building (rehab) permit as well, which Metro says "will trigger required inspections and allow trade permits to be pulled by registered contractors". The list does not name water heater replacement on its own; ask Codes (615-862-6500) before treating a swap as exempt. An electric water heater is also an item on Metro's electrical permit application.

Meters and backflow: licensed plumber only

Two Metro pages leave no homeowner route:

• Water meters. "Meter installation requires a licensed plumber." Each meter a project needs (domestic, irrigation, fire sprinkler) is permitted and inspected, and the first meter inspection is booked automatically "for 30 business days after the date the permit is pulled" (Water Meter Inspection).
• Backflow preventers. Required for "large residences and most commercial projects", and "Pools, irrigation, and sprinkler systems require backflow preventers". Installation "requires a licensed plumber", and the Codes Department "will issue the backflow preventer permit to the plumber" (Backflow Preventer Inspection). For a residential project, the cross-connection review goes through Metro Water Services.

Both must pass before a Use and Occupancy letter on a new house, so a pool or irrigation project that skips them will stall at the end.

Who can pull it

Metro's trades permit page: "Only licensed contractors with an e-permit account can apply for a trade permit using our online system"; others apply in person at 800 President Ronald Reagan Way, weekdays 7:30 a.m. to 4:00 p.m., with the Plumbing Trade Permit Application.

Fees and deadlines

We could not find Metro's current plumbing fee table online; Codes sets it at issue. Metro's trade applications say work must start within six months and finish within two years of issue, and a permit lapses if work stops for a year (Metro electrical application form, read 23 October 2026).

Checking it afterwards

Search the address in ePermits or open the parcel in Metro's Parcel Viewer and pick Permit History. Your plumber's company should be on the plumbing permit, with a passed final (Nashville building permit search).

What 26,809 Nashville plumbing permits show

Nashville plumbing permits close reliably: only 16 of 214 busy plumbing firms finish under 70%. The market is more concentrated than electrical, with the busiest single firm holding 12.1% of permits against 4.6% in electrical. Filed values spread wide, from $5,000 to $25,000 across the middle half of firms, so ask what kind of jobs a firm's record is made of before comparing it with yours. Prices by job size are on Nashville plumbing cost, and monthly totals on Nashville permit statistics.

See every Nashville plumber by permits finaled →

Before you hire

Ask whose master plumber's certificate the permit will be pulled under; the full checklist is in hiring a plumber in Nashville and the license steps in Nashville contractor license lookup. Compare firms on the Nashville plumber list. Other cities' rules are in do I need a permit for plumbing repairs and water heaters; national prices in plumbing labor cost.

What this does not tell you

We cannot time Nashville permits from issue to final, so there is no days figure. Homeowner permits name the owner, not a firm. Metro's permit list was last revised in 2022, and it is a guide, not the code; ask Codes when a job is not on it.