3 rules for unincorporated Butler County, Ohio.
Verified from official government sources
There is no single county setback. In county-zoned townships, R-District minimum yards range from 25–35-foot front, 8–20-foot side, and 30–45-foot rear depending on district. Cities and self-zoning townships set their own setbacks.
Butler County Rural Zoning Resolution 8.0605
Standalone Lots... the following area requirements apply: R-1 ... Front Yard Depth 35 feet, Side Yard Width One Side 15 feet, Rear Yard Depth 45 feet. R-2 ... Front Yard 30 feet, Side 8 feet, Rear 40 feet. R-3 ... Front 25 feet, Side 8 feet, Rear 30 feet.
In county-zoned townships, no principal residence may exceed 2½ stories or 30 feet, and accessory structures may not exceed 1½ stories or 20 feet. R-4 multi-family reaches 3 stories or 40 feet. Cities set their own limits.
Butler County Rural Zoning Resolution 8.0601
Maximum Height. No principal structure or use shall exceed two and one half (2½) stories or thirty (30) feet in height (except in the R-4 District), and no accessory structure shall exceed one and one half (1½) stories or twenty (20) feet in height, except as provided in Section 24.3.
The county resolution controls buildable area through minimum lot size and density rather than a fixed coverage percentage: R-1 needs 20,000 sq ft, down to 6,500 sq ft in R-4. Cities and self-zoning townships set their own coverage rules.
Butler County Rural Zoning Resolution 8.0605
Standalone Lots... Single-Family Residential Dwellings: R-1 20,000 sq ft; R-1A 15,000 sq ft; R-2 9,000 sq ft; R-3 7,000 sq ft; R-4 6,500 sq ft.
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