Piscataway, NJ Building Setbacks & Zoning: Setback Rules (2026)

Section 21-616 of the Zoning Chapter sets the Township's baseline front yard rule: where more than half the street frontage in a block is already developed, a new building's front yard must be at least as deep as the average of the existing front yards on that block, but the depth can never drop below 25 feet regardless of the neighboring average. Section 21-611 extends the front-yard standard to every yard that faces a public street, so a lot with frontage on two streets must meet the minimum front setback on each of them; the only carve-out in the chapter is frontage on Interstate 287, which is not treated as a front yard for this purpose.

Corner lots get their own cross-reference at Section 21-604: the minimum front setback for the applicable zone applies to both intersecting streets, not just the address-facing one, which typically pushes a garage, deck or addition further from the property line than an interior lot would require. Section 21-605 closes a common workaround: a yard or open space that already satisfies one building's setback cannot be counted a second time to satisfy the setback of another building, and open space on one lot cannot be borrowed to cover the yard requirement of a building on a different lot.

The district-specific minimum lot area, coverage and height figures for each zone, including R-7.5, R-10, R-15, R-20 and R-40, sit in the Schedule of General Requirements referenced at Section 21-501.1, administered by the Zoning Officer under Section 21-601's compliance clause, and that schedule sets the exact side and rear setback figures for each district on top of the front yard floor described above.