Tualatin Development Code Chapter 40 (Low Density Residential RL Zone) governs carports and other accessory structures. Table 40-3 sets minimum setbacks of 15 feet front, 5 feet side, 15 feet rear, and 20 feet for a garage door, with a maximum structure height of 35 feet and a maximum lot coverage of 45 percent for single-family dwellings. A non-habitable detached accessory structure under 200 square feet and 15 feet tall does not require a building permit but must still meet TDC setbacks.
Tualatin Development Code (TDC) Chapter 40 (Low Density Residential RL Zone), Table 40-3 establishes the dimensional standards that apply to carports and detached garages on RL-zoned single-family lots: a minimum front-yard setback of 15 feet (reduced to 12 feet if to an unenclosed porch), a minimum side-yard setback of 5 feet, a minimum rear-yard setback of 15 feet, a 20-foot setback to the face of any garage door, and a 10-foot setback for the secondary frontage on a corner lot. Maximum structure height is 35 feet, maximum lot coverage is 45 percent for single-family dwellings, and architectural features such as eaves and gutters may project no more than 3 feet into a required front or rear yard or 2 feet into a side yard under TDC 40.310(4). Comparable standards apply in TDC Chapter 41 (RML), Chapter 42 (RMH), and Chapter 43 (RH) for those medium and high density residential zones. The Tualatin Planning Division FAQ states that a non-habitable, one-story detached accessory structure is exempt from a building permit only when the floor area does not exceed 200 square feet and the height does not exceed 15 feet measured from grade plane to the highest roof surface; over those thresholds, a building permit issued under the Oregon Residential Specialty Code by the Tualatin Building Division at 503-691-3044 is required regardless of zone. Properties subject to homeowner-association covenants or located within the Central Tualatin Overlay Zone (TDC Chapter 58) may face additional design or location restrictions for carports.
Building a carport in violation of TDC Chapter 40 setback, height, or lot-coverage standards, or installing a structure over 200 square feet or 15 feet tall without a Tualatin Building Division permit, can result in a stop-work order, code-enforcement action, and required removal or after-the-fact permitting. Civil infractions are prosecuted under Tualatin Municipal Code Chapter 7-01 with fines determined by the municipal court, and unpermitted work must be brought into compliance with the Oregon Residential Specialty Code.
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