Contractor Certification in New Jersey
New Jersey has one of the highest rates of elevated indoor radon in the Northeast. The Reading Prong geology extends through Morris, Somerset, Hunterdon, and Warren counties — among the highest-radon areas in the state. NJDEP certification is mandatory for compensated radon mitigation work.
Regardless of state licensing requirements, always verify that any radon contractor you hire holds current NRPP certification (nrpp.info) or NRSB certification (nrsb.org). These national certifications require passing a written exam and adhering to AARST ANSI installation standards.
Permit Requirements
New Jersey does not require a statewide building permit for radon mitigation in existing single-family homes. An electrical permit is typically required at the local level when a new circuit or outlet is installed for the radon fan. Confirm with your local building department before work begins.
Radon Zones in New Jersey
New Jersey has counties in EPA Radon Zone 1 & 2. Zone 1 counties have the highest predicted average indoor radon levels. Even homes in lower-zone counties can test high — the only way to know your home's actual level is to test it with a certified test device.
What New Jersey Homeowners Should Do
- Confirm your test result. At or above 4 pCi/L on a confirmed long-term test, proceed with mitigation. At 8+ pCi/L, act without further delay.
- Find 2–3 certified contractors. Search NRPP at nrpp.info or NRSB at nrsb.org for New Jersey-based certified mitigators. Get written quotes.
- Confirm permit requirements. Ask your contractor: "Will you pull an electrical permit if new wiring is needed?" Confirm with your local building department.
- Schedule installation. Standard SSD installation takes 3–8 hours. Typical cost in New Jersey: $950–$2,200.
- Post-mitigation test. Wait 24–48 hours after installation, then run a radon test. Target: below 4 pCi/L, ideally below 2 pCi/L.
Free Download: New Jersey Radon Homeowner Checklist
Step-by-step checklist covering testing, permits, contractor selection, and post-mitigation testing. One printable page.
Download Free PDF