Porter County, IN Fence Regulations: Retaining Walls (2026)

Under Chapter 5 of the Porter County Unified Development Ordinance, the Fence and Wall Standards for residential zoning districts (§5.16 FW-02) set the baseline: subsection G.1 says the owner shall have an approved Improvement Location Permit (Fence) prior to erecting a fence or wall, and that requirement covers retaining walls along with ordinary fences. Subsection G.2 then narrows the field with two exceptions. A landscape or retaining wall skips the permit only if it is under five feet in height AND is not located within five feet of a property line; a wall shorter than five feet but closer than five feet to the line still needs the permit, and so does any wall five feet or taller regardless of setback.

The section separately exempts fenced dog-kennel areas capped at 300 square feet. Retaining walls also inherit the article's placement rule barring any fence or wall from a public street easement, right-of-way, or a right-of-way shown on the county's Thoroughfare Plan (§5.16.B.2). For scale, ordinary residential fences in the same section top out at three feet in the front yard (four feet where no primary structure exists) and six feet in the side or rear yard, while commercial parcels fall under the separate §5.17 FW-03 standard allowing walls up to eight feet in side and rear yards.

Applicants file for the retaining-wall permit the same way as any Improvement Location Permit, through the Porter County Development Services/Plan Commission office referenced throughout Chapter 5.