Spokane County, WA Building Safety: Plumbing Permits (2026)

07 adopts the UPC with local modifications: Chapters 12 and 15 of the UPC are deleted outright, and the venting, combustion-air and building-sewer portions of UPC Chapter 5 are not adopted in the county, leaving those governed by other adopted codes. Appendix D of the UPC is adopted for drain sizing, with a minimum design rainfall of two inches per hour used to size drains under that appendix. 030, permits for plumbing installations tied to a project that requires a building permit cannot be issued before that building permit is issued, sequencing plumbing work behind the structural review.

The Building and Planning director may develop alternate procedures beyond the UPC's own permitting text to streamline how plumbing permits move through the office. 08, and are recalculated once a year every January 1st using the September Consumer Price Index for the West B/C region, benchmarked against a December 1996 base value of 100. 070, hears disputes over application of the plumbing code. Because the plumbing permit is legally bound to the building permit sequence, a homeowner or contractor who tries to schedule plumbing rough-in inspections before the structural permit is active will be turned away until the paperwork catches up.