The City's administrative code, enacted in its current form in June 2026, requires a permit to install, alter, convert or replace a plumbing system, then lists the work that is exempt. One exemption fits many replacements: a water heater of the same type and fuel source, in the same location, with an equal or lower amperage rating, plus minor changes to its connections. It applies to detached single-family homes, two-family homes and townhomes where the heater serves one dwelling unit. Apartment and commercial buildings are not on that list. Until December 31, 2026, the City also accepts permit applications under its 2018 codes, which list different exemptions.
A change of type, fuel or location, such as a tank-to-tankless conversion, a switch from gas to electric or a heater moved to a new spot, is not covered, so plan for a permit and inspection. The City's Residential Rebate Program may help: it rebates 100% of building permit, plan review and SFR fees for improvements to single-family homes, as long as the work passes final inspection within a year of the permit and the application arrives within 60 days of that approval. Its page does not name plumbing permits, so ask the City whether a water heater permit qualifies.
