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Find Basement remodelers in Mahwah

Avatar for BAS Construction
BAS Construction
5.0(
42
)

Serving Mahwah, NJ and surrounding areas

Approved

In business since 1982

Free estimates

Credit card accepted

"Excellent finished product. Very enjoyable people to work with on a home project. Highly skilled worksmanship, excellent communications about what’s happeneing and what to expect next. Prompt and courteous. I would recommend to anyone looking to do home remodeling. Very professional."
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project
Remodeling - Basements Project
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project

+22

5 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Owens Corning Basement Finishing System
Owens Corning Basement Finishing System
4.5(
745
)

Serving Mahwah, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1990

Free estimates

Warranties offered

"We love our basement remodel. Peter, Alex and his team were here when they said theyâ d be here, completed the job as described, and kept us updated along the way. The basement now looks and feels clean and bright. The additional space doesnâ t feel like a basement at all and is enjoyed by the whole family. We highly recommend Lux Renovations."
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+40

Response time1 day
Response rate98%
214 neighbors recently requested a quote
Avatar for Elite Tech Remodeling
Elite Tech Remodeling
4.3(
205
)

Serving Mahwah, NJ and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"George and his team remodeled my kitchen and two bathrooms. Their work was excellent quality, communication throughout the projects was very good and the price was very fair. I highly recommend them and will be using them for future projects."
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+56

Response time1 day
Response rate97%
1 neighbors recently requested a quote
Avatar for Dynamic Design & Remodeling
Dynamic Design & Remodeling
5.0(
13
)

Serving Mahwah, NJ and surrounding areas

Approved

Super Service Award Winner

Free estimates

Emergency services offered

Credit card accepted

"The team at Dynamic Design & Remodeling were superb. I hired them to do our basement and could not be happier with the result. Great craftsmanship, on budget, and on time. I'll definitely be using Justin and team for our next renovation."
Weston Kitchen Design
Weston Kitchen Design
Weston Kitchen Design
Weston Kitchen Design
Kitchen Render

+25

1 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Prestige Design & Build Corp.
Prestige Design & Build Corp.
5.0(
40
)

Serving Mahwah, NJ and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"My basement got flooded during IDA, after contacting with couple of contractor I met with Matt, He came on time and explain everything what needs to be done also provide a reasonable price. He started to work immediately with his team. His work was very professional, he did everything as he promised and completed the work on time. He was the most professional, clean and trustful contractor I have met so far. He was always top of the every process and he was paying attention to every small details even I didnâ t see them during the construction. I highly recommend him, I also started recommending him my friends. I will 100% contact him even if I have a small project in the future, Thank you Prestige Design and Build for Beyond Expectation."
Demarest multiple room remodel
completion of renovation
Addition project progress
Rear addition project
Master bedroom suite

+497

Response time6 hrs
Recommended by66%of homeowners
Avatar for Proworks Interiors
Proworks Interiors
5.0(
6
)

Serving Mahwah, NJ and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"We highly recommend Proworks interiors ! John responded to our inquiry for a finished basement quickly and was at our house to provide an estimate within 24 hours. He is very detail oriented , and was extremely helpful in creating a plan for our space. Throughout the entire process, he was a great communicator, promptly responding to all of our questions and concerns . He made sure every detail was exactly to our liking. We would definitely use proworks interiors again !"
Bathroom Remodel
Fireplace Wall
Fireplace wall
Bathroom Remodel
Basement Bar

+25

Response rate100%
Recommended by100%of homeowners
Avatar for CSZ Construction
CSZ Construction
4.6(
68
)

Serving Mahwah, NJ and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"I took a chance with CSZ construction because Home Advisor reviewers were so positive-- and I am glad I did. Cesar, the owner, is a very competent professional who did most of the work himself. He weatherproofed my balcony door, fixed a window and replaced the water line of my refrigerator. His prices are very competitive and he will be my go-to repairman from now on."
 ALL COLUMNS FINISH
OLD DECK
Livinroom
 PAINTING
PREPARING FOOTINGS

+168

Recommended by95%of homeowners
Avatar for American Home Remodeling Inc
American Home Remodeling Inc
4.4(
651
)

Serving Mahwah, NJ and surrounding areas

Approved (Corporate)

In business since 1994

Free estimates

Warranties offered

"American home remodeling Inc was amazing to work woth. Very professional and remodeling to perfection. Mark wad an outstanding person to work with. Definitely recommend!"
Driveways - Asphalt Project
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+29

24 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for HD Renovations
HD Renovations
4.5(
116
)

Serving Mahwah, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Domenick is a professional craftsman. He kept to a tight schedule, always showed up on time and did a great job. He gave us creative ideas that would work in our space. Domenick and his team were pleasant to work with. From the moment they entered our home they worked a full day and showed up everyday. Domenick enjoys and takes pride in his work. We are extremely pleased with the final result. Our basement bathroom was transformed into an oasis with a spa feel. The main area in the basement and hallway leading to the basement was also transformed into a warm, welcoming living space. The work he performed in 3 weeks was: Build a new shower/tile with a design/create a shower bench/install shower panel/tile behind the vanity with the design trim/install the vanity/move plumbing, gas and electrical for the shower and vanity with light fixture/tile the floor/install a stackable washer and dryer/build out a wall to divide the storage area and heat unit/install a sliding barn door/paint the bathroom, main room and hallway up to the kitchen door/ installed 3 windows, an air conditioner and installed recessed lighting in the bathroom/installed interlocking vinyl flooring in the storage area, main room and stairs (repaired two broken stairs and lots of extras, e.g. installed a lighting fixture in the hallway by the stair landing, a make up/shaving mirror in the bathroom, installed window treatments and assembled a 70 inch TV storage cabinet). We have booked him for future projects. We highly recommend Domenick and his team."
Kitchen and Bath Remodeling Project
Bathroom renovation
Accessible shower two days
Complete demo of existing shower or bathtub area completed in two days.
Bathroom and kitchen remodel

+94

Response time1 day
2 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Garden State Home Remodeling
Garden State Home Remodeling
4.8(
28
)

Serving Mahwah, NJ and surrounding areas

Approved

In business since 1999

Free estimates

Warranties offered

"Hired this company after interviewing two other companies to remodel my kitchen. My husband and I were saving for quite some years to have this project done so we wanted the best contractor that we trusted to do the work. They came in to our home (on time with the appointment) and explained every detail about the job step by step. We really appreciated this and we didn’t feel rushed or pressured. John the sales rep was willing to spend as much time needed to answer our questions. We did not get the same sense of patience from other contractors. Although not the cheapest or most expensive we are happy we selected Garden State Home Remodeling for our extensive kitchen rehab. Thank you Garden State Remodeling Group for a job well done."
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+6

Response time3 days
7 neighbors recently requested a quote
Recommended by100%of homeowners
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FAQs for basement remodeling projects in Mahwah, NJ

Finishing a basement turns unused square footage into livable space and returns up to 70% of what you spend when you sell your home. Beyond that resale boost, you gain a playroom, home office, or guest suite you can start enjoying right away. That mix of daily comfort and solid return on investment (ROI) makes basement finishing one of the smartest upgrades you can tackle.

In some parts of the country—especially lots on swamps, high water tables, or other wetlands—local codes prohibit basements. Saturated soil puts constant pressure on foundation walls and lets water seep in faster than any sump pump can handle. 

If your property sits on waterlogged ground, building on a slab or crawl space is often safer, more affordable, and code-compliant.

Most basements wrap up in four to eight weeks. Framing takes three to five days, with electrical and plumbing rough-ins following over the next week. Add five days for drywall, two to three for flooring, and another week for paint, trim, and punch-list items. 

Delays can happen if materials run late or your contractor’s calendar is packed, so build in a little cushion when you plan.

Whether a finished basement counts toward your home’s official square footage depends on local rules. Many areas only include below-grade space if it has code-approved egress, fully finished walls, ceilings, and floors, plus consistent heating. 

Check with your local assessor or building department before you start; meeting those standards can affect taxes, appraisals, and resale value.

Building codes require a checklist: dedicated heat and electrical service, a code-approved stairway, and at least one egress window or exterior door. Walls, ceilings, and floors must be fully finished and meet insulation, ventilation, and fire-separation standards. If you add a bedroom, you’ll also need a closet, proper clearances, and safe exits. If you change the layout later, be ready to update the space so every new room still meets today’s code.

The Mahwah, NJ homeowners’ guide to basement remodelings

From average costs to expert advice, get all the answers you need to get your job done.