A public service of The Hunterdon Scoop · Hunterdon County, New Jersey

The best general contractors in Hunterdon County.

Additions and gut renovations: the hires that go through permits, inspections, and your savings. We checked what's checkable on every general contractor we could find serving the county. Every fact below names its source and the date we checked. Nobody paid to be on this page, and nobody can.

Records pulled All 8 · July 14, 2026

8 checked · 1 we'd call first

Who we'd hire

Earned, never sold. The order means something.

The anchor pick

RJO Home Improvements LLC

Flemington, Hunterdon County

Owner-run, EPA Lead-Safe and WEDI certified, strong 4.8 Angi score with reviews citing careful framing/inspection work — caveat: the "Best of Hunterdon" claim is unverified, don't cite it as fact. Credential verified against the state registry, date shown.

✓ Active · verified 2026-07-14 13VH06140800 Website

Picks in waiting. These look like calls we'd make, but their credentials run through a registry we haven't finished pulling directly, and nothing gets a stamp here secondhand:

Armstrong Interiors LLC (Flemington) — 25 years of local addition/dormer work with a named owner (Frank Armstrong) and consistent 4.9-5.0 third-party review scores — caveat: no BBB grade exists to cross-check, so lean on the Angi/Houzz reviews and ask for local references directly.
Bryhn Design/Build (Flemington) — Design-build model (design and construction under one roof) plus 28+ years in Flemington and a top-quartile BuildZoom score — caveat: no BBB letter grade, so their own GuildQuality/Houzz reviews are the best third-party check available.

Why trust this page

We pull credentials from the official registries ourselves and print the date next to every status — general contractors doing additions, remodels, and most residential home-improvement work in New Jersey must be registered as a Home Improvement Contractor (HIC) — not a traditional 'license' in the trade-exam sense, but a state registration with proof of $500,000+ general liability insurance and workers' comp. Registration numbers follow the format 13VH#######00. Verify any contractor's registration status directly at the NJ Division of Consumer Affairs Home Improvement Contractor registry search: https://newjersey.mylicense.com/verification/ (or start at https://www.njconsumeraffairs.gov/hic/Pages/default.aspx). Do not rely on a number printed on a website — third-party directories in this research (BuildZoom) showed at least one Hunterdon-area contractor's registration flagged expired despite an active-looking web presence.. Picks are editorial judgment on the checkable record: years in the trade, complaint patterns, review consistency, real presence in the county. No company paid to be listed, none can pay to become a pick, and when a pick has a weak spot we print it. Here are the full rules.

Every general contractor we checked

Real, independently-run general contractors doing additions/major renovations are genuinely present in Hunterdon County — Flemington and Whitehouse Station each have multiple owner-operated shops with 20+ years on the ground (Armstrong Interiors, Bryhn Design/Build, RJO Home Improvements, CB Construction). But the search results are also thick with templated lead-gen sites — Magnolia Home Remodeling's "service-areas/hunterdon-county-nj/[town]/general-contractor" pages and VM Power Construction's "/locations/flemington" page are the same boilerplate copy stamped across dozens of towns from an out-of-area (in VM Power's case, Pennsylvania-registered) parent business, with no distinct local address — both were excluded from the table. A couple of genuinely-run adjacent-county shops (Iaione Contracting in Hackettstown/Warren County, Freedom General Contracting in Doylestown/Bucks County PA) do real work in Hunterdon and are worth knowing about even though they're not headquartered inside the county line. One in-county pick, Robert G Jones Restorations, has a real 40+ year track record but a HIC registration that third-party trackers flagged as expired in 2025 — that needs a direct verification call before anyone hires them.

Local presence only Sort

The roster — 8 general contractors checked · registry pulled July 14, 2026
Company & services	Based in	NJ HIC #	Registry status	BBB	Reviews (as reported)
Armstrong Interiors LLC Registered as Armstrong Interiors, LLC Room additions & bump-outs · Dormer additions · Garage conversions · Kitchen remodeling · Bathroom remodeling · Basement finishing · Custom carpentry	Flemington In county	13VH127500	… Pending check	Not checked	5.0 (Angi); 4.9 (Houzz)
Bryhn Design/Build Home additions · Whole-home remodels · Kitchen remodeling · Bathroom remodeling · Master suite design-build · Outdoor living spaces · In-house interior design	Flemington In county	13VH000024500	… Pending check	Not checked	5.0 (Houzz); 100 reviews (GuildQuality/company claim)
RJO Home Improvements LLC Kitchen remodeling · Bathroom remodeling · Additions & deck construction · Interior renovations · Exterior work	Flemington In county	13VH06140800	✓ Active · 2026-07-14	Not checked	4.8 (Angi)
CB Construction Inc. Registered as CB Construction, Inc. Additions · Kitchens · Bathrooms · Whole-house remodeling · Restorations	Whitehouse Station (Readington Twp) In county	13VH01237900	✕ Expired · 2026-07-14	Not checked
Iaione Contracting Kitchen & bathroom renovations · Additions & room expansions · Basement finishing · Decks · Masonry & stone veneer · Tile, drywall, windows/doors · Concrete & patios	Hackettstown	13VH10457000	✓ Active · 2026-07-14	Not checked	5.0 (HomeAdvisor); 4.9 · 12 reviews (Birdeye)
Robert G Jones Restorations Bath & kitchen remodels · Whole-house remodels · Renovations · Custom projects	Lambertville In county	13VH01299100	✕ Expired · 2026-07-14	Not checked	5.0 (Angi)
Streamline Kitchens and Baths, Inc. Kitchens · Bathrooms · Windows & doors · Tile & flooring · Decks · Sunrooms · Additions	Flemington In county	13VH11839000	✓ Active · 2026-07-14	Not checked	2 reviews (Facebook)
Freedom General Contracting, Inc. Whole-house remodels · Kitchens & bathrooms · General home improvements · Storm rebuild/restoration work	Doylestown, PA	NJ HIC 13VH08327600 / PA 105182	… Pending check	Not checked	11 reviews (Facebook)

Registry status comes straight from the state's verification system on the date shown, and you can rerun any number there yourself in about two minutes. Review scores are what the named platforms report and we have not audited them. BBB grades as of July 2026. "Based in" is the registered address city, which sometimes differs from where a company says it operates. An active registration is the floor, not an endorsement; the picks we would actually call are above.

What it costs

Per 2026 NJ-wide pricing guides (Jayhawk Construction, The 5th Wall Co.): a standard finished room addition in New Jersey runs about $250-$375/sq ft, basic additions $175-$275/sq ft, bathroom/primary-suite additions $325-$500/sq ft, and second-story additions $300-$550/sq ft. Building out (single-story) is cheaper than building up. NJ prices generally run 15-25% above national averages due to labor and code costs. No Hunterdon-specific pricing source was found — these are statewide figures, treat as directional.

Before you hire

Confirm the HIC registration number is active right now, not just printed on their truck — search it yourself at the NJ registry link below rather than trusting a website badge, since registrations lapse and directory sites (BuildZoom, Angi) can be months stale.
Get the contract in writing before any deposit, and check it against NJ's Home Improvement Contractor rules: a fixed start/completion date, a total price, a payment schedule tied to completed work stages (never front-load the deposit), and the HIC number printed on the contract itself — NJ law caps upfront deposits and requires this paperwork.
For anything that adds square footage (additions, dormers, second stories), ask who is pulling the township building permit and zoning variance if needed — Hunterdon's rural towns (Kingwood, Delaware Twp, Franklin Twp, etc.) often have setback and septic/well rules that trip up out-of-area contractors unfamiliar with the local zoning office.
Ask for two references from jobs completed in the last 12 months specifically in Hunterdon County — not just anywhere in central NJ — so you can call a neighbor-adjacent homeowner and ask about permit delays, change-order pricing, and whether the crew showed up when promised.
Get proof of current general liability insurance (NJ requires at least $500,000 per occurrence for HIC work) and workers' comp coverage in writing, not a verbal assurance — an uninsured subcontractor getting hurt on your property is your liability if the GC's coverage has lapsed.

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

Questions neighbors actually ask

Do I need a licensed contractor for a home addition in Hunterdon County, or can I just hire a handyman?

For an addition or any major renovation, New Jersey requires the business to be registered as a Home Improvement Contractor (HIC) with the state — this isn't optional, and it's separate from any township building permit. A handyman doing small repairs under a certain dollar threshold may not need it, but framing a new room, adding a dormer, or any structural work absolutely does. Always ask for the HIC number and verify it yourself rather than taking their word for it.

How much does a home addition actually cost in Hunterdon County?

Based on 2026 New Jersey-wide pricing guides, a standard finished room addition runs roughly $250-$375 per square foot, with basic additions starting around $175-$275/sq ft and bathroom or primary-suite additions running $325-$500/sq ft. Building out (a single-story addition) is cheaper than building up (a second story), which can run $300-$550/sq ft. New Jersey prices generally sit 15-25% above national averages because of labor rates and code requirements — get itemized quotes from at least two Hunterdon-area contractors before assuming a number is fair.

Why do some of these contractors show 'not BBB accredited' — is that a red flag?

Not automatically. BBB accreditation is something a business pays for and applies for; plenty of well-reviewed, properly licensed local contractors in this county simply haven't bothered with it. What matters more for a home improvement contractor is an active HIC registration with the state, real (not templated) local references, and a written contract that matches NJ's home improvement contract rules. Treat 'no BBB rating' as a reason to check other sources — Angi, Houzz, direct references — not as a disqualifier on its own.

One license checked every Thursday.

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