Bellevue plumbing code and permits

City of Bellevue Development Services requires permits for water heater replacement, sewer line work, repipes, water service line replacement, and concealed piping alterations. Routine maintenance and like-for-like fixture swaps do not. Skipping a required permit creates three downstream risks: insurance denial of related claims, mandatory disclosure on home sale with potential price reduction, and retroactive permit costs typically 2 to 3 times the original fee. This section covers what requires a permit, how to apply, and how to handle unpermitted work from previous owners.