Boise establishes building setbacks through its Development Code (Title 11), Section 11-04-03 (Lot and Building Design and Dimensions). Setbacks vary by zoning district and are designed to ensure adequate spacing between structures, streets, and neighboring properties.
Residential zones typically require a 20-foot front setback, 5-foot side setbacks (15 feet on street side for corner lots), and a 15-foot rear setback. Commercial zones have different standards depending on the district. Accessory structures may have reduced setback requirements. Covered porches and certain architectural features may encroach into setbacks by limited amounts. Variances may be granted by the Board of Adjustment for hardship situations. The Development Code Table 11-04-03.B lists specific setbacks for each zoning district.
Building within required setbacks without a variance is a code violation. Non-compliant structures may require modification or removal. Building permits are checked against setback requirements during plan review. Encroachment complaints trigger code enforcement investigation.
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See how Boise's setback rules rules stack up against other locations.
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