Building permits, zoning and septic rules in Piscataway Township, New Jersey

At a glance

Building permit

Required; issued by the township's Building Division⁴¹

Zoning

Yes, township Chapter 21 and an Official Zoning Map²

Septic

Middlesex County Environmental Health Division³

Sewer connection

Required on streets with a Township-built sewer, after notice⁵

Owner-builder

Owner may pull own permit; permit still required⁶

Subdivision

Regulated through the Planning Board⁷

Who to call

Contact details are copied from each office’s official page and were checked against it on October 13, 2026.

Do you need a building permit in Piscataway Township, NJ?

Yes. New Jersey's statewide Uniform Construction Code requires a construction permit before covered work begins, and the permit comes from the municipal construction official rather than the county⁴⁸. In Piscataway Township the enforcing agency is the Building Division of the Department of Community Development, staffed by the Construction Official and building, plumbing, electrical and fire-protection subcode officials¹.

A new building also needs a certificate of occupancy from the construction official before anyone uses or occupies it⁹. Ordinary maintenance, as the state code defines it, does not need a permit⁸. We could not confirm Piscataway's current fee schedule; ask the Building Division.

Who issues building permits in Piscataway Township, and how do you reach them?

The Piscataway Township Building Division provides construction permit review and inspection services for building, electrical, plumbing and fire protection work¹⁰. It sits in the Department of Community Development, and the township's Planning Division handles zoning permits from the same department¹¹.

Because the township, not Middlesex County, runs building permits, a reader sent to the county planning counter has been sent to the wrong office for building permits or zoning. See the Piscataway Township contacts listed on this page.

Does Piscataway Township have zoning, and what does it mean for RVs, tiny homes and lot size?

Yes. Piscataway Township adopts and administers Chapter 21 Zoning and an Official Zoning Map that divides the township into zones². The published districts run from Rural Residential (RR-1) to Residential (R-10) and beyond¹². Middlesex County does not zone; New Jersey's Municipal Land Use Law gives that power to municipalities¹³.

Lot size, setbacks, coverage and height are set district by district in the township ordinance, so the answer depends on the zone of the specific parcel¹⁴¹⁵. We could not confirm a general rule on tiny homes, accessory dwellings or camping in an RV on a lot; ask the Planning Division before buying. Subdivision of land goes through the Planning Board and requires a sketch plat application⁷.

How do septic permits work inside Piscataway Township?

Septic work for Piscataway addresses goes through the Middlesex County Environmental Health Division, which states that all septic work requires its approval¹⁶. State law requires the board of health with jurisdiction to certify the sewerage facilities before a building permit can issue, and requires a board of health inspection before a system is covered¹⁷¹⁸.

Many Piscataway streets have public sewer. Where a Township-built sewer runs along the street, an occupied or occupiable building must connect, and the owner must act within 30 days after notice⁵. We could not confirm which parcels are on septic; ask the township Engineering Division or the county health office. Private wells need a state drilling permit issued through municipal or county health officials¹⁹.

Building a home in Piscataway Township: the steps, in order

1. Ask the Planning Division which zone the parcel is in and whether the use fits¹².
2. If the lot must be subdivided, file the sketch plat with the Planning Board⁷.
3. Confirm sewer or septic: connect to the township sewer where it runs, or get Middlesex County Environmental Health approval for septic⁵¹⁶.
4. Apply for a construction permit with the Building Division¹⁰.
5. Schedule the inspections and obtain the certificate of occupancy before moving in⁹.

What stays with Middlesex County, and what to check before you buy?

Septic approvals stay with the county's Environmental Health Division¹⁶. For land outside Piscataway Township, see the Middlesex County page.

An owner may act as their own agent and pull the permit for their own building, but the permit is still required⁶. A driveway that connects to a State highway needs a state access permit²⁰. Middlesex County's effective property tax rate is about 2.2%²¹, with a median bill of $9,684 a year²².

Watch-outs

• We could not confirm Piscataway's permit fee schedule, accessory-dwelling rules or RV and tiny-home occupancy rules; ask the Building Division and the Planning Division before you commit to a purchase¹⁰¹¹.
• Owner-building does not remove the permit: the state's owner-builder exception covers new-home builder registration only, not construction permits or inspections²³.
• Zoning map and district rules are set by the township and can be amended, so confirm the current zone of a parcel with the Planning Division².

Sources

1. Chapter 14: Building (Piscataway Township), quoted and re-checked
2. Township of Piscataway Municipal Code (Piscataway Township), quoted and re-checked
3. Middlesex County NJ — Septic System Program (2026 county census)
4. NJ Dept of Community Affairs — The NJ State Uniform Construction Code (2026 county census)
5. Chapter 23: Sewers and Wastewater (Piscataway Township), quoted and re-checked
6. NJ Dept of Community Affairs — UCC General Information (2026 county census)
7. Chapter 20: Land Subdivision (Piscataway Township), quoted and re-checked
8. N.J.A.C. 5:23-2.14, Construction permits—when required (New Jersey statewide rule), quoted and re-checked
9. N.J.A.C. 5:23, Uniform Construction Code (New Jersey statewide rule), quoted and re-checked
10. Piscataway Township Building Division (Department of Community Development) (piscatawaynj.org)
11. Piscataway Township Planning Division (Department of Community Development) (piscatawaynj.org)
12. Chapter 21: Zoning (Piscataway Township), quoted and re-checked
13. P.L. 2013, c.106 — Municipal Land Use Law amendments (New Jersey statewide rule), quoted and re-checked
14. P.L. 2013, c.106 (Municipal Land Use Law amendments) (New Jersey statewide rule), quoted and re-checked
15. P.L. 2013, c.106 (Municipal Land Use Law amendments) (New Jersey statewide rule), quoted and re-checked
16. Middlesex County Environmental Health Division (middlesexcountynj.gov)
17. New Jersey Statutes, R.S. 58:11-23 through 58:11-43 (New Jersey statewide rule), quoted and re-checked
18. New Jersey Statutes, R.S. 58:11-23 through 58:11-43 (New Jersey statewide rule), quoted and re-checked
19. Bulletin 88-10: Private On-Site Water Supply Systems (New Jersey statewide rule), quoted and re-checked
20. Major Access Permits (New Jersey statewide rule), quoted and re-checked
21. Effective property tax rate: Bolthole Index county data
22. Median property tax bill: Bolthole Index county data
23. Builder Registration and New Home Warranty for Builders (New Jersey statewide rule), quoted and re-checked

Written October 13, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.