Idaho Falls, ID Building Setbacks & Zoning: Lot Coverage Limits (2026)

Maximum lot coverage in Idaho Falls is set per zone by Comprehensive Zoning Section 11-3-4 and Table 11-3-1. The maximum coverage percentages are: RE Residential Estate 30%, RP Residential Park 40%, R1 Single Dwelling 40%, R2 Mixed Residential 80%, TN Traditional Neighborhood 50%, R3 Multiple Dwelling 80%, R3A Residential Mixed Use 80%, and RMH (mobile/manufactured home) 40%. How coverage is measured depends on the zone and use: in the RE, RP, R1, and RMH zones, lot coverage includes 'only those areas under roofs' (Section 11-3-4(C)(2)). For multi-unit or commercial uses, lot coverage includes 'all areas under roofs and paved surfaces, including driveways, walks, and parking areas,' with the remainder landscaped as required (Section 11-3-4(C)(3)). Accessory structures in residential zones are additionally limited so that accessory buildings cover no more than thirty percent (30%) of the rear yard (Section 11-4-8(A)(2)), and Table 11-3-3 lists a maximum rear-yard coverage of 30% for accessory structures. Commercial and industrial zones in Chapter 3 carry their own coverage standards. Because the measurement method and cap depend on your zone and use, confirm your specifics with the Building Division when planning additions or new structures.