Washington County requires a building permit for carports. Carports must meet CDC 418 setbacks and CDC 413 parking/driveway rules. Detached accessory structures under 200 sq ft and 15 ft tall are exempt from building permits but not from zoning.
Carports are accessory structures regulated under Washington County CDC 430 (Special Use Standards) and CDC 418 (Setbacks). Attached carports follow primary dwelling setbacks (typical R-5: 15-foot front, 5-foot side, 10-foot rear). Detached carports under 200 sq ft and 15 feet tall are exempt from building permits under the Oregon Residential Specialty Code R105.2, but must still comply with setbacks and lot coverage. Larger carports require a building permit including plans showing foundation, roof framing, wind and snow loads (25 psf ground snow, Exposure B, 95 mph wind). Prefabricated metal carport kits do not escape permitting. HOAs often have CC&Rs limiting carport location or prohibiting detached carports entirely. Front-yard carports are generally disfavored in R-5/R-6 zones.
Unpermitted carport over 200 sq ft: stop-work order, retroactive permit with investigation fee, potential removal. Setback violations: correction order, possible demolition. HOA fines: per CC&Rs.
Washington County, OR
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See how Washington County's carport rules rules stack up against other locations.
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