New Jersey's Basement
Finishing Specialists
Arch Basements (a division of Arch General Contracting LLC) builds finished basements across New Jersey — man caves, home theaters, guest suites, rental apartments, and more. One in-house crew. One point of contact. One standard for quality.
Basements Became Our Specialty for a Reason
Arch began as a full-service New Jersey contractor more than 20 years ago. Early on, we noticed a pattern: homeowners were happy with the rest of the house, but the basement always came with a story — moisture, bad framing, rough finishes, work left for "later." The basement was the room that needed a real specialist.
So we started putting our best crew on basement jobs. Then more of them. Word spread, and finished basements became the work we were known for. Today, they're what we build almost exclusively — and that focus is why every Arch basement stays dry, level, and finished to a standard we'd accept in our own homes.
We're a licensed, insured, and BBB-accredited New Jersey contractor with over 20 years in business. That accreditation reflects how we treat homeowners before, during, and after the build — not just the final walkthrough.
250+
Basements Delivered
250+
Basements Finished
20+
Years in Business
98%
Referral-Driven Business
A+
BBB Accredited
Why Homeowners Choose Arch for Their Basement
We're not the cheapest basement quote you'll get and we're not trying to be. We're the crew that actually finishes the job dry, level, and to a standard we'd accept under our own homes.
Basements Are All We Build
We don't dabble. Finished basements are 95% of what we do — every crew member is a basement specialist.
One Crew, Frame to Finish
The same in-house team that frames your basement also wires, waterproofs, tiles, and trims it. No revolving subs.
Schedules We Honor
Most basements wrap in 6–10 weeks. We give you a realistic timeline up front and update you every Friday.
Dry Basements, Guaranteed
Licensed in New Jersey, fully insured, and every finished basement is backed by a written workmanship warranty.
From Concrete Shell to Finished Basement
Basement Walkthrough
We meet you at your basement, check moisture, ceiling height, egress, and panel capacity — and listen to how you actually want to use the space.
Style, Scope & Estimate
You get a clear written scope tied to one of our basement styles, a line-item budget, and a realistic build schedule — not a vague back-of-napkin number.
Permits, Framing, Build
We pull the permits, handle inspections, and run the build day in, day out — framing, electrical, plumbing, drywall, trim, and finish — with our own basement crew.
Walkthrough & Warranty
Nothing's done until you say it's done. We walk every detail with you and back the finished basement with a written workmanship warranty.
Ready to Finish Your Basement?
We respond to every basement inquiry personally. Tell us how you want to use the space and we'll set up a no-cost site visit.
Get a Free Basement Estimate