Basement finishing · Union County, NJ
Finish the basement you already paid for
Family rooms, guest suites, gyms, and legal bedrooms, designed, permitted, and built by DMF Construction's own crews out of Scotch Plains.
- Permits, inspections, and egress windows handled
- Moisture checked and fixed before we frame
- Bathrooms and bars added without a second contractor
Services
Everything below the first floor
Basement Finishing
Turn bare concrete into a family room, office, gym, or guest suite, built to code with permits.
Learn more →Basement Bathrooms
Add a full or half bath below grade, with the right pump or ejector system for your plumbing.
Learn more →Basement Bedrooms & Egress Windows
Cut in a code-compliant egress window and add a legal basement bedroom.
Learn more →Basement Remodeling
Tear out the 1980s paneling and drop ceiling and rebuild the room the right way.
Learn more →Moisture Control & Flood-Ready Finishes
Sump pumps, drainage, and finishes that survive water, for Rahway River towns and older foundations.
Learn more →Why now
The typical Union County house was built in 1956
That means a full basement, an old foundation, and 70 years of stored boxes. A finished basement is usually the least expensive way to add a family room, a bedroom, or an office without going through an addition's zoning process.
Fall and winter are the best time to build one. Exterior trades slow down, crews are available, and the room is done before spring.
Typical 2026 ranges
Finished family room: $45K–$70K
With full bath: $65K–$95K
Guest suite + bath + egress: $80K–$120K
Open the calculator →How it works
From first visit to final walkthrough
- Free visitWe measure, check moisture and ceiling height, and talk through layout.
- Written priceA detailed scope and a firm price, usually within a week.
- PermitsDMF prepares drawings and files with your town.
- BuildFraming, rough-ins, inspections, drywall, finishes. Most jobs take 5–8 weeks.
- WalkthroughFinal inspection, punch list, and your certificate of approval.
Free estimate
Get a real number for your basement
We measure, check moisture and ceiling height, look at your plumbing and electrical, and send a written scope with a firm price. The visit takes about 45 minutes and there's no obligation.
“The projects went pretty smooth, they are very honest and fair, punctual which most important now a days.”
“The pricing was fair and competitive compared to other quotes that I have gotten. They gave me a step by step outline.”
“David has been 100% accessible, EVERY time I needed, by phone, email and most impressively, in person.”
Service area
Basement finishing across Union County and nearby
Tap your town for local pricing, permit notes, and projects near you.
FAQ