ADU Ledger

How tall can a detached Puyallup ADU be?

✓ Verified against code · August 20, 2026

Up to 36 ft in the RS-35, RS-10, RS-08 and RS-06 zones, because an ADU simply takes the principal dwelling's height allowance. In RS-04 the figure is 28 ft permitted or 25 ft conditionally. That 36 ft is among the most generous ADU height allowances in Washington — well above the 24 ft floor the state requires.

Citation: PMC 20.20.010(11)(h); Table 20.20.020

How current is this?

Puyallup’s ADU rules run under PMC 20.20.010(11) (Accessory Dwelling Units) (Ordinance 3341 (building on Ord 3324)). Puyallup adopted its HB 1337 baseline in Ordinance 3324 in 2025, then restructured the ADU standards again in Ordinance 3341, effective April 28, 2026. Its parking rule is the most granular in this ledger — it scales with both lot size and bedroom count — and its ADU height, at up to 36 ft, is among the most generous in Washington. We verified this answer against primary sources on August 20, 2026, and every change we catch is logged in the changelog.

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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.