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Piscataway, NJ Zoning Overlays & Bonuses: Density Bonus Law (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Base density
8 units per acre
Bonus density ceiling
12 units per acre
Bonus formula
1 unit per 333 sq ft commercial
First 100 bonus units set-aside
15% affordable
Next 100 bonus units set-aside
10% affordable
Final 100 bonus units set-aside
5% affordable

Summary

In the TC, Towne Center Zone, Piscataway Township lets developers build beyond the eight-unit-per-acre base residential density up to a 12-unit-per-acre bonus under Section 21-32.1, earned one residential unit for every 333 square feet of first-floor Qualifying Main Street Commercial space built, with tiered affordable-housing set-asides rising as more bonus units are added.

§ 21-32.1. Permitted Uses. ... (3) Maximum residential gross density shall be eight units per acre, exclusive of any concierge residential units in the 13 story tower building, but subject to the following enhanced bonus density: 12 units per acre, provided as one residential unit for each 333 square feet of first floor retail and personal service spaces for the uses set forth in subsection 21-32.1a2(a) (Qualifying Main Street Commercial) only are constructed up to the maximum bonus density of 12 units per acre. By way of example, if 100,000 square feet of Qualifying Main Street Commercial space is constructed, 300 bonus residential units may be constructed. (4) Bonus residential uses shall provide affordable housing units in accordance with the following schedule: • Initial 100 units at 15% setaside; • Next 100 units at 10% setaside; • Final 100 units at 5% setaside;

Full Breakdown

Section 21-32.1 of the TC, Towne Center Zone sets a base maximum residential gross density of eight units per acre, excluding any concierge units in the district's existing 13-story tower building. Developers can reach an enhanced bonus density of 12 units per acre, but only by constructing first-floor 'Qualifying Main Street Commercial' space, meaning the retail and personal service uses listed in Section 21-32.1a2(a) such as retail stores, banks, personal service establishments, arts and crafts studios, and sit-down restaurants. The bonus formula awards one residential unit for every 333 square feet of that qualifying commercial space, up to the 12-unit-per-acre ceiling; the ordinance gives its own worked example, that 100,000 square feet of Qualifying Main Street Commercial space earns 300 bonus residential units.

Each block of bonus units carries a rising affordable-housing set-aside: the first 100 bonus units require a 15% set-aside, the next 100 require 10%, and the final 100 require 5%, all of which may be built on-site or off-site elsewhere in the Township. Any affordable-housing obligation tied to redeveloping the existing 13-story tower is instead satisfied through a 2.5% non-residential affordable housing fee on the net increase in the redevelopment's assessed value, rather than through set-aside units. All development, base or bonus, must proceed under a General Development Plan approved by the Township Planning Board under the Municipal Land Use Law.

Violations & Fines

Building above the 12-unit-per-acre bonus ceiling, or claiming bonus density without constructing the qualifying 333-square-foot-per-unit Main Street Commercial space, exceeds Section 21-32.1's density formula and is enforced through Planning Board site plan review; occupancy permits will not issue for units that outrun the approved General Development Plan's density and affordable-housing set-aside terms.

Frequently Asked Questions

How much extra density can a Towne Center Zone project get?
Section 21-32.1 lets a project rise from the base eight units per acre to an enhanced bonus density of 12 units per acre, but only by building qualifying first-floor Main Street Commercial space; the ordinance's example is 300 bonus units for 100,000 square feet of that commercial space.
What affordable housing is required for bonus density units?
The set-aside rises in tiers: the first 100 bonus units need a 15% affordable set-aside, the next 100 need 10%, and the final 100 need 5%, and those units can be built on-site or elsewhere in the Township.
Does the 13-story tower count toward the density cap?
No. Section 21-32.1 excludes any concierge residential units in the existing 13-story tower building from the density calculation, and any affordable-housing obligation tied to redeveloping that tower is satisfied instead through a 2.5% fee on the net increase in the redevelopment's assessed value.

Sources & Official References

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