Planning commission backs ADU code changes with material and lot‑size clarifications

Jan 8, 2026

The commission recommended Jan. 7 that the city council adopt amendments to the detached accessory dwelling unit rules (Title 9‑8) with additional language allowing lot‑size exceptions and requiring ADUs be built of the same materials as the primary residence; commissioners debated height, setbacks and whether tiers should be based on lot size.

The full story

The Washington City Planning Commission on Jan. 7 recommended approval of amendments to the city’s detached accessory dwelling unit (ADU) ordinance (Title 9‑8). Staff proposed a tiered approach that retains 1,000‑square‑foot ADUs in smaller zones and allows up to 1,500 square feet in larger‑lot zones, changes maximum heights tied to setbacks (up to 25 feet where setbacks allow), reduces side/rear setbacks to 3 feet, and updates parking requirements.

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