In-law suite additions in Monmouth County, NJ.
Free in-home design consult Attached or inside the house
A bedroom, a bathroom and a place to sit, built for a parent, a grown kid or a caregiver. Added onto the house or carved out of a basement or first floor. The ballpark per-square-foot range for a suite is below.
Book my free consult
Name, phone and the project. We call you back.
- Service
- In-law suite additions
- Where
- Monmouth County, plus Old Bridge and East Brunswick
- The offer
- Free in-home design consult
- Pricing
- Written, line-by-line proposal. Ballpark ranges below.
- Hours
- Mon–Sat 8 AM–7 PM
- Office
- 105 Church Street, Suite 3A, Aberdeen, NJ 07747
- Call
- (732) 845-6440
What goes into it
First-floor suites
No stairs. A bedroom and bath on the main floor, the easiest setup for a parent who can't do stairs.
Basement suites
An egress window, a full bathroom and a comfort plan of its own. Good for a grown kid.
A bathroom built for later
Curbless shower, grab bars on blocking and a comfort-height toilet. Plumbing by our sister company, FIXALL Plumbing Heating & Air, NJ Master Plumber Lic. #36BI01212500.
A private entrance
A separate door, where your town's zoning allows it.
Kitchenette rules
Some towns don't allow a second full kitchen in a single-family home. We check yours before we draw a stove.
Attached, not detached
We build suites attached to the house or inside it. We don't build backyard cottages or detached ADUs.
Free in-home design consult.
We come to your house and look at the room. You tell us what you want. We tell you straight what it takes.
- No charge, no obligation
- A written, line-by-line proposal
- Changes written up and priced first
What an in-law suite costs
Budgeting numbers, not a quote. Your real price comes in writing after the free consult.
Primary suite (Bed + bath) per sq ftStandard $325–$400 · Premium $390–$500 · Luxury $480–$600
| 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.
Run your own ballpark
Pick the room, the size and the finish. Budgeting only: your real price comes after the free consult.
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.
What to expect
From the first call to the final walkthrough, in writing.
Call or send the form
Tell us who the suite is for and when they're moving in.
Free in-home design consult
We look at where it can go: the first floor, the basement or a new addition.
Written, line-by-line proposal
Every line spelled out, with the zoning and permit steps.
Approvals, build, walkthrough
Approvals before work starts, then the build and a walkthrough with you and whoever's moving in.
What is an in-law suite?
A private living space inside or attached to your house, usually a bedroom, a bathroom and a sitting area. Some have a kitchenette where the town allows it.
How much does an in-law suite addition cost?
As an addition it's priced by the square foot, like a primary suite. The ballpark range is on this page with the other addition types. A basement or first-floor conversion runs differently, and the free consult gets you a written number.
Can an in-law suite have its own kitchen?
It depends on your town. Some don't allow a second full kitchen in a single-family home, and a kitchenette may need approval. We check your town's rules first.
Can you put an in-law suite in the basement?
Yes, if the basement is dry and there's room for an egress window and a full bathroom.
Do you build detached ADUs or backyard cottages?
No. We build suites attached to the house or inside it. Whether a detached unit is allowed at all is up to your town's zoning.
Can you make the suite accessible?
Yes. A no-step entry, a curbless shower, grab bars on blocking and wider doors. See our accessible bathroom page.
More from FIXALL Remodeling
Related services
Cost and permit guides
In-law suites near you
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.