3 county-level rules, plus city-specific rules for 1 city in Ada County, Idaho.
Verified from official government sources
In the Rural Residential (RR) district, Ada County requires front-yard setbacks of 30 to 50 feet depending on the road, a 25-foot side street setback, a 25-foot interior side setback, and a 25-foot rear setback. Other zones have their own dimensional tables.
Ada County Code Table 8-2-6-1 (Rural Residential)
Front Yard Setback (min): Arterial, collector, or section line street 50'; Other roadway 30'; Property line not fronting a roadway 25'. Side Street Setback (min) 25'. Interior Side Setback (min) 25'. Rear Setback (min) 25'.
In the Rural Residential (RR) district, Ada County limits building height to a maximum of thirty-five feet (35'). Building height is measured from average ground level at the front wall to the highest roof point. Each base district sets its own maximum.
Ada County Code Table 8-2-6-1; Ch. 10 (Building Height)
Building Height (max): 35'. Building Height: The vertical distance from the average contact ground level at the front wall of the building to the highest point of the coping of a flat roof or to the deck line of a mansard roof, or to the mean height level between eaves and ridge for gable, hip, or gambrel roofs.
In the Rural Residential (RR) district, Ada County caps lot coverage at 10 percent for the base category and 20 percent for a rural residence. Building coverage is the total allowable percentage of a lot that may be covered by buildings.
Ada County Code Table 8-2-6-1; Ch. 10 (Building Coverage)
Lot Coverage (max): Base 10%; Rural Residence 20%. Building Coverage: The total allowable percentage of a lot that may be covered by a building or buildings.
1 cities in Ada County have their own building setbacks & zoning rules. Each link goes to that city's dedicated page with code citations.
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