Franklin County, OH Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Max lot coverage
- 20% of lot by structure
- Principal uses
- One per lot
- Exceptions
- Churches and schools only
- District
- Rural District (unincorporated)
Summary
In Franklin County's unincorporated Rural District, no lot may be covered more than 20% by structure, and only one principal use is allowed per lot, with narrow exceptions for churches and schools.
Only one (1) principal use shall be permitted on a lot, and such lot shall not be covered more than twenty percent (20%) by structure. Exceptions: Churches and schools may have more than one principal structure per lot.
Full Breakdown
Section 302.041(c) caps lot coverage in the Rural District -- the base zoning classification for unincorporated Franklin County -- at 20% of the lot covered by structure, and limits each lot to one principal use. Churches and schools are the only listed exceptions, allowed more than one principal structure per lot. Denser districts like R-24 Suburban Apartment carry a separate 35% cap under Section 318.041.
Violations & Fines
Covering more than 20% of a Rural District lot with structures, or placing a second principal use on one lot, violates Section 302.041(c) absent a listed exception.
Frequently Asked Questions
How much of my rural Franklin County lot can I build on?
Is the 20% cap the same in every district?
Sources & Official References
Other rules in Franklin County
Compare Franklin County to another location·View the Ohio building setbacks & zoning overview
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