How Much Does a Home Addition Cost in NJ? (2026)
Ballpark 2026 NJ home addition costs per square foot for family rooms, primary suites and kitchen bump-outs, plus second stories. (732) 845-6440.
Straight answer: additions are priced by the square foot, and the type of room matters as much as the size. A family room, a primary suite and a kitchen bump-out each run differently, and a second story is its own line. The table below has the ballpark ranges.
These are budgeting numbers, not a quote. They're based on typical 2026 project costs in Monmouth County and Central New Jersey. Your real price comes in a written, line-by-line proposal after a free in-home design consult.
The ranges
| Addition type | Standard | Premium | Luxury |
|---|---|---|---|
| Family roomGround floor · per sq ft | $200–$275 | $260–$375 | $360–$475 |
| Primary suiteBed + bath · per sq ft | $325–$400 | $390–$500 | $480–$600 |
| Kitchen expansionBump-out · per sq ft | $400–$480 | $470–$575 | $560–$650 |
| Add-on | Ballpark range |
|---|---|
| Second-story addition | $40,000–$90,000 |
| Vaulted ceiling & skylights | $6,000–$15,000 |
Ballpark ranges for budgeting only, based on typical 2026 project costs in Monmouth County and Central New Jersey. Not a quote, an offer or a price we can lock in. Your price depends on your home, your materials and the scope. It comes in a written, line-by-line proposal after a free in-home design consult.
Why a bump-out costs more per foot
A kitchen bump-out packs cabinets, counters, plumbing and appliances into a small footprint, so its per-square-foot number runs highest. A family room is mostly open space, so it runs lowest. A primary suite sits in between because of the bathroom.
Run your own ballpark
- Pick the type: family room, primary suite or kitchen bump-out.
- Estimate the size in square feet.
- Multiply by the range for your finish level.
- Add any add-ons, like a vaulted ceiling and skylights.
- Going up instead of out? The second-story line covers that. See dormers and second-story additions.
Out or up?
Estate lots in Colts Neck can leave room to build out. If your lot is tight, going up with a dormer or a second story is often the way to add bedrooms, and the capes and ranches in towns like Hazlet and Middletown are natural candidates.
What else goes into an addition
- Zoning. Setbacks, lot coverage and height limits decide what's possible before design does. If the plan doesn't fit, it may need a variance.
- A survey. Your town will want to see where the addition sits on your lot. If you have a survey from your closing, dig it out.
- Drawings. Most additions need drawings for the permit. We walk you through what yours needs.
- The foundation. Slab, crawl space or full basement under the new room.
- Matching the house. Rooflines, siding, trim and windows matched so it doesn't look tacked on.
- Tie-ins. Heat, air, plumbing and power have to reach the new space. Plumbing by our sister company, FIXALL Plumbing Heating & Air, NJ Master Plumber Lic. #36BI01212500.
How long does it take?
Approvals can take a while on their own: zoning, drawings, permits. Then comes the build. Your proposal includes a realistic schedule with the approval steps in it. We don't promise dates on a website.
For a parent moving in
An in-law suite addition is priced like a primary suite. See our in-law suites page.
Decks, porches and patios
FIXALL Remodeling builds rooms: no decks, porches or patios. Decks and porches are built by our sister company, FIXALL Roofing & Exteriors.
Next step
See what goes into an addition on our home additions page, then book your free in-home design consult. Or call (732) 845-6440, Monday to Saturday, 8 AM to 7 PM.
Let’s talk about your project.
Send the form or call (732) 845-6440. We call you back to set up the consult.
Tell us about the project
The town, the room and your timeline. Photos help.