Ada County, ID Building Setbacks & Zoning: Structure Height Limits (2026)
Key Facts
- RR max height
- 35 feet
- Measured from
- Avg ground at front wall
- Measured to
- Highest roof point
- Varies by
- Base zoning district
- Code table
- Ada County 8-2-6-1
Summary
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.
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.
Full Breakdown
Ada County Code Table 8-2-6-1 (Rural Residential, RR) sets a maximum building height of thirty-five feet (35') for both the base and the rural-residence category. Title 8's definitions state that Building Height is '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.' Other base districts (RP, RUT, R1, R2, and up) each list their own maximum height in their Chapter 2 dimensional tables. These limits apply to unincorporated Ada County.
Violations & Fines
Exceeding the district's maximum building height without a variance is a zoning violation; Development Services can withhold permits or require corrective work.
Frequently Asked Questions
How tall can a home be in Ada County's RR district?
How is building height measured?
Sources & Official References
Other rules in Ada County
Compare Ada County to another location·View the Idaho building setbacks & zoning overview
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