Building Setbacks & Zoning in Allen County, IN (2026)
3 rules for unincorporated Allen County, Indiana.
Verified from official government sources
Setback Rules
In Allen County's R1 Single Family district, a home must sit at least 25 feet from the front lot line and 25 feet from the rear. Interior side yards are 5 feet (public sewer) or 15 feet (private septic); accessory structures 3 feet.
Building Setbacks in Unincorporated Allen County
Some RestrictionsAllen County Zoning Ordinance, Title 3, R1 Single Family Residential Development Standards
Front yard: Platted lot 25' (or platted building line setback, whichever is greater)... Side yard Interior lot: Public sewer 5'; Private sewage disposal 15'... Rear yard Primary building 25' (50' if adjacent to an arterial or collector street).
Structure Height Limits
In Allen County's R1 Single Family district, a primary building may be up to 40 feet tall and an accessory building up to 25 feet. Height limits vary by zoning district and are set in the county Zoning Ordinance.
Building Height Limits in Allen County, Indiana
Some RestrictionsAllen County Zoning Ordinance, Title 3, R1 Single Family Residential Development Standards (Height maximum)
Height (maximum): Accessory building 25'; Primary building 40'.
Lot Coverage Limits
Allen County's Zoning Ordinance defines lot coverage as the portion of a lot covered by buildings but does not set a numeric maximum coverage percentage for single-family residential lots. Buildable area is controlled through yard setbacks and minimum lot size instead.
Lot Coverage Rules in Allen County, Indiana
Some RestrictionsAllen County Zoning Ordinance, Title 3 (Definitions - Lot Coverage)
Lot Coverage: That portion of a lot that is covered by buildings.
All Allen County ordinances
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