Plainfield, NJ Fence Regulations: Retaining Walls (2026)

Retaining walls sit inside the fences and walls rules of § 17:9-29 of the Plainfield Municipal Code. Walls are permitted in all districts of the City of Plainfield but are structures requiring an approved development permit prior to construction, with surveys, plans and details submitted to the Zoning Officer.

Height is stated for the front yard: decorative and retaining walls in a front yard in residential zone districts cannot exceed two and one half feet, measured from ground level. Wall piers and entryways in that yard cannot exceed five feet. The side and rear yard limits in subsection B are written for decorative walls: four feet in residential zones and six feet in nonresidential zones, with wall piers and entryways up to seven feet. The section sets no wall height at which engineering review becomes automatic.

Engineering review is discretionary under subsection G: any permitted wall proposed to be used as a retaining wall can be required to be reviewed by the City Engineer prior to the issuance of a development permit. That puts the decision on a hillside or grade-change wall in the hands of the City at the permit stage.

Subsection E applies to walls as well as fences: they must be built so natural drainage continues and cannot cause surface water to be blocked or dammed, either on the property or on any adjacent lot. Anyone applying for the development permit must ensure compliance. Under subsection H, a wall that forms a permitted buffer area screen approved with a site plan is excepted from the height and location provisions.

The Zoning Officer enforces the section under § 17:1-20 and is the first stop for the application.