Shed permit rules in Tualatin, OR — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Per Tualatin's Planning FAQ, a non-habitable one-story detached accessory structure like a shed needs no building permit if its floor area does not exceed 200 square feet and it is no higher than 15 feet. Zone setbacks under TDC 40 and 41 still apply.
The Tualatin Planning FAQ states that non-habitable one-story detached accessory structures do not require permits if the floor area is 200 square feet or less and the structure is 15 feet tall or less, measured from grade plane to highest roof surface. Sheds exceeding either threshold require contacting the Building Division (503-691-3044) for permit review. In RL zones, TDC Table 40-3 still applies: front setback 15 ft, side 5 ft, rear 15 ft, max height 35 ft, max lot coverage 45%. The RML zone follows TDC Table 41-3. Sheds cannot encroach into vision clearance triangles defined by TDC 73.400(16).
Sheds over the 200-square-foot or 15-foot threshold without a building permit, or sheds violating the underlying zone setbacks in TDC 40 or 41, are subject to stop-work orders and abatement by Community Development.
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