How tall can a detached Spokane ADU be?
✓ Verified against code · August 20, 2026
25 ft, and the figure is the same in every residential zone — RA, R1, R2, RMF and RHD. That is one foot above the 24 ft floor HB 1337 requires.
Citation: Table 17C.111.205-2
How current is this?
Spokane’s ADU rules run under SMC 17C.300 (Accessory Dwelling Units) (Ordinance C36696 (amended by Ord C36753)). Spokane rewrote its ADU chapter in Ordinance C36696, effective July 11, 2025 — eleven days after the state's June 30 deadline — then amended the expiration and transfer provisions again in Ordinance C36753 (effective November 28, 2025). Read SMC 17C.300.140 carefully: it still speaks of "required" parking for ADUs, but the citywide minimum was already zero by then, so the condition it describes cannot arise today. We verified this answer against primary sources on August 20, 2026, and every change we catch is logged in the changelog.
More Spokane ADU questions
- How many ADUs can I build in Spokane?
- Do I need parking for a Spokane ADU?
- Do I have to live on the property in Spokane?
- How close to the property line can a Spokane ADU sit?
All Spokane ADU rules → · Compare Washington cities →
Not legal advice — lot-specific overlays can change the answer for your parcel. The citation above points at the governing code section; check it, or ask the city to confirm.