Before You Build in Union County, NJ: Permit & Rule Checklist (2026)

Elizabeth and Union County municipalities require building permits for retaining walls over 4 ft (measured from bottom of footing to top of wall) per N.J.A.C. 5:23. Engineered plans required for walls over 4 ft or with surcharge.

NJ Uniform Construction Code (N.J.A.C. 5:23-3.14) mandates minimum 4-ft pool barriers. Elizabeth and most Union County towns require 5-ft fences with self-closing, self-latching gates. Mandatory at pool permit inspection.

New Jersey has no statutory fence cost-sharing requirement. Each property owner is responsible for their own fence. NJ common law recognizes the spite fence doctrine, allowing courts to order removal of malicious fences.

Fence height limits are set by municipal zoning codes in Union County. Typical NJ limits: 6 ft rear/side yards, 3–4 ft front yards. Pool fencing must meet NJ Barrier Subcode (48 inches minimum).

Most Union County municipalities require zoning permits for fence installation. Under NJ UCC, fences generally do not require a building permit under 6 ft, but zoning permits are typically required.

All Union County municipalities require construction permits for swimming pools under NJ Uniform Construction Code N.J.A.C. 5:23. Elizabeth Building Department (Chapter 15.04) reviews pool applications for setbacks, barriers (4-foot minimum per NJ Barrier Subcode), electrical GFCI, and drainage. Above-ground pools over 24 inches deep require permits. Westfield, Summit, and Cranford require zoning approval before UCC permit. Inspections include barrier, electrical, and final. Elizabeth, Plainfield, and Linden also require Board of Health approval for commercial/multi-family pools.

Building permits required for all pools per NJ UCC (N.J.A.C. 5:23). Anti-entrapment required under federal VGB Act. Electrical permits triggered for pools over 42 inches deep. Municipal zoning approval also required.

NJ Uniform Construction Code (N.J.A.C. 5:23) requires electrical permit for 240V hot tubs. Barrier rules apply to spas over 24 inches deep. Elizabeth zoning sets placement setbacks.

NJ Barrier Subcode (N.J.A.C. 5:23-2.14(b)) requires pool barriers of at least 48 inches with self-closing, self-latching gates. NJ is among the strictest states for pool barrier requirements. Compliance required at property sale.

Above-ground pools in Union County municipalities require zoning permits. Pools over 24 inches deep require a building permit per NJ UCC. Same barrier/fencing requirements apply as in-ground pools under state Barrier Subcode.

New Jersey has no statewide ADU mandate. ADU permission depends on local zoning per NJ MLUL. Most Union County municipalities do not permit ADUs by right. Zoning board variance required in most communities.

Garage conversions require building permits per NJ UCC (N.J.A.C. 5:23) and local zoning approval. Must maintain minimum off-street parking requirements. Full NJ UCC compliance for habitable space conversion.

Elizabeth and Union County municipalities require building permits for carports under N.J.A.C. 5:23. Setbacks match accessory structure zoning (typically 3–5 ft side, 10 ft rear).

NJ's 2024 ADU law (N.J.S.A. 52:27D-123.16) requires municipalities to permit ADUs by right — provides pathway for foundation-built tiny homes. Tiny homes on wheels classified as RVs. Min 400 sq ft typical.

Shed construction requires zoning permits from the local municipality. NJ UCC generally exempts sheds under 100–200 sq ft from building permits (varies by municipality). Must comply with setback requirements.

Open burning is generally prohibited in New Jersey under NJDEP regulations (N.J.A.C. 7:27-2). All outdoor fires must use elevated, approved containers. Burning leaves, grass, or trash is illegal statewide.

Fire pits are legal in Union County municipalities if using approved elevated containers per NJ Uniform Fire Code (N.J.A.C. 5:70). UCC-approved containers must be 15 ft from structures; non-approved must be 25 ft away.

NJDEP may issue statewide drought restrictions during water emergencies. NJ American Water and Elizabethtown Water serve much of Union County. Local watering schedules imposed during drought watches.

Public tree maintenance in Union County is handled by municipal Shade Tree Commissions under the NJ Shade Tree Act (N.J.S.A. 40:64-1). Property owners responsible for trees overhanging sidewalks and streets.

NJDEP requires all NJ municipalities to adopt tree removal-replacement ordinances as part of MS4 stormwater permit compliance (since Nov. 2022). Individual municipalities set permit requirements and replacement ratios.