The Hunterdon Scoop / Hire

Insulation contractors in Hunterdon County

The unglamorous upgrade with the fastest payback in a county of drafty old farmhouses.

Skip to all 96 businesses filed under General Contracting & Remodeling in the county directory ↓

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What it costs

There is no reliable NJ-specific per-square-foot or per-job price source for insulation or spray foam work. the numbers on aggregator sites are national averages. Ask each contractor for a written quote broken out by insulation type and area (attic, walls, crawl space) rather than relying on a rule-of-thumb price.

Before you hire

  1. Ask for the NJ Home Improvement Contractor (HIC) number and check it yourself at newjersey.mylicense.com/verification. A registration can read as cancelled or expired on state records while the trucks and the website still look active, so do not take a truck decal or a website badge as proof.
  2. Get the R-value and insulation type in writing before work starts (open-cell vs. closed-cell spray foam, blown fiberglass vs. cellulose), these have very different costs and performance, and 'insulation' alone on a quote isn't specific enough to compare bids.
  3. If you're chasing a rebate, confirm the contractor is an active NJ Clean Energy Program participant before the job, not after, the rebate paperwork usually has to be filed by the contractor and tied to program-approved materials and installation standards.
  4. Ask what happens to old insulation, especially in an attic with signs of rodents or water damage, reputable installers remove and bag contaminated material separately; if a quote skips this, ask directly rather than assume it's included.
  5. For spray foam specifically, ask about off-gassing/cure time and whether the crew does a blower-door or air-sealing test before and after, foam applied over gaps and leaks without air sealing first is a common source of underperformance complaints in this trade.

The relevant license for this category is the NJ Home Improvement Contractor (HIC) registration, administered by the NJ Division of Consumer Affairs under the Contractors’ Registration Act. There is no separate "insulation contractor" license; insulation and spray foam work on residential property falls under the general HIC registration, format 13VHxxxxxxxx. Check any contractor’s number for free at the state lookup: https://newjersey.mylicense.com/verification/ (background at https://www.njconsumeraffairs.gov/hic). A registration can read as cancelled or expired on state records while the marketing is still running, so always check the state site directly before hiring.

Do it in your browser: check any license · check your quote · the storm-chaser test

The local picture

Real in-county supply is thin. Most of what surfaces in a search is a national installer network or a franchise headquartered well outside the county.

Questions neighbors actually ask

Do insulation contractors need a special license in NJ, or just a general home improvement license?

Just the general one, NJ doesn't have a separate 'insulation license.' Anyone doing insulation work as a paid contractor on a residential job needs to be registered as a Home Improvement Contractor (HIC) with the NJ Division of Consumer Affairs. You can look up any contractor's HIC number for free at newjersey.mylicense.com/verification before you sign anything.

Does NJ's Clean Energy Program actually pay for insulation, or just review the work?

It can pay. Through the Home Performance with ENERGY STAR track, homeowners who go through a participating contractor can get rebates toward air sealing and insulation (commonly cited around $1,000, though the exact number depends on the program year and your utility). The catch is you generally need to use a program-participating contractor and get an energy audit first, you can't do the work with any contractor and apply for the rebate after the fact.

Is spray foam always better than blown-in fiberglass or cellulose for an old Hunterdon farmhouse?

No, it depends on the assembly. Spray foam seals air leaks along with insulating, which matters in old, drafty construction, but it's pricier and harder to reverse if it's misapplied. Blown-in cellulose or fiberglass is cheaper and works fine in an open attic with no major air-leak problem. A contractor who quotes spray foam everywhere without first talking about air sealing and where the leaks actually are is worth a second opinion.

96 businesses filed under General Contracting & Remodeling in the county directory, A–Z

Everything filed under General Contracting & Remodeling in the county directory, alphabetically. It is a broad category, so it takes in neighboring lines of work as well as insulation contractors. No ordering, no ranking, no picks.

Names, towns and numbers come from The Hunterdon Scoop business directory, pulled July 28, 2026. Want this list narrowed to your town? Browse General Contracting & Remodeling by town. A business appearing here is not a recommendation, and no business pays to be on it.

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