Nashua, NH Building Safety: Plumbing Permits (2026)
Key Facts
- Code adopted
- International Plumbing Code, 2021 amendments
- Enforcing agency
- Department of Building Safety
- Building sewer depth
- 36 in. septic / 48 in. other
- Water heater temp
- Min. 140°F; fixtures capped at 130°F
- Permit required
- Yes, before plumbing work begins
Summary
Nashua adopts the International Plumbing Code as its city Plumbing Code, administered by the Department of Building Safety, with local amendments covering fees, sewer depths, and water temperature limits.
A certain document and referenced code on file in the Department of Building Safety of the City of Nashua, New Hampshire, being marked and designated as the "International Plumbing Code," adopted as per the New Hampshire State Building Code per RSA 155-A and as published by the International Code Council, Inc., ... is hereby adopted as the Plumbing Code of the City of Nashua, in the State of New Hampshire, for the control of buildings and building systems, with any amendments prescribed in this article.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4805762; v29 updated 2026-02-10; through 02-10-2026).
Full Breakdown
Nashua adopts the International Plumbing Code, as amended under the New Hampshire State Building Code (RSA 155-A), as its Plumbing Code under Nashua Revised Ordinances § 105-16. Plumbing work requires a permit through the Department of Building Safety, with fees set by chapter under § 105-17(B). Local amendments require building sewers serving septic systems to run at least 36 inches deep (48 inches for other building sewers), cap tankless-water-heater and faucet temperatures at 130°F, and set a 140°F minimum for water heaters and indirect-fired storage tanks.
Violations & Fines
Violating the Plumbing Code or permit terms is enforced under NRO Chapter 74 and RSA 676:15-17-b, without limiting any other remedy available to the City at law or equity.
Frequently Asked Questions
Does Nashua require a plumbing permit?
What plumbing code does Nashua use?
Sources & Official References
Other rules in Nashua
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