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Find Basement remodelers in Williamstown

Avatar for Owens Corning Basement Finishing System
Owens Corning Basement Finishing System
4.8(
535
)

Serving Williamstown, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1990

Free estimates

Warranties offered

"We had a great experience with the Lux Renovations and Owens Corning team. The whole process was very easy from designing the space, selecting colors, and having a contract manager who organized the entire basement remodel including all the trades and inspections. We were sold on the Owens Corning materials for the basement and that they were engineered specifically for a basement space. Would highly recommend this team for your basement remodel needs."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+40

Response time1 day
Response rate98%
182 neighbors recently requested a quote
Avatar for Bowen Contracting Inc
Bowen Contracting Inc
4.9(
117
)

Serving Williamstown, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1991

Free estimates

Credit card accepted

"We are returning customers of Bowen Contracting after they dis a great job with our patio and enclosure. This time it was a basement remodeling project. Jeff and his crew did a great job, using high quality materials and high quality workmanship. They were flexible with regards to us modifying existing plans as the project progressed. We recommend Bowen Contracting to anyone who might want any home improvement work accomplished. "
Additional Photos
Additional Photos
Additional Photos
Azek deck with vinyl rail
Additional Photos

+65

Response time1 day
1 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for ZZeo's Home Renovations
ZZeo's Home Renovations
5.0(
95
)

Serving Williamstown, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Small jobs welcome

"Angel from ZZeos did a FANTASTIC job with my bathroom remodel. My bathroom is beautiful!!!!! Angel and his crew were very professional, attentive and courteous. He kept me in the loop every step of the way. He is extremely knowledgeable and very skilled. I would definitely use ZZeos Home Renovations again and would highly recommend hiring him to anyone looking to have renovations done."
Response time6 hrs
15 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Superior Construction Solutions, LLC
Superior Construction Solutions, LLC
4.9(
16
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 2014

Free estimates

Credit card accepted

"Superior Construction did a fantastic job on our new kitchen. We love it and already have plans for them to come back and do some additional work. I would absolutely recommend this company."
mt ephraim
mt ephraim
mt ephraim
burlington
burlington

+27

Response time10 hrs
2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Katz Construction LLC
Katz Construction LLC
5.0(
8
)

Serving Williamstown, NJ and surrounding areas

Approved

Free estimates

Credit card accepted

Customers say: Quick response

"It went great from start to finish. They did an awesome job and actually built me a replacement panel for my fence and installed in one day. I also had them repair two overhead beams out front (same quality of work) Kevin is a true craftsman."
Remodeling - General Project
Remodeling - General Project
General Remodeling Project
Remodeling - General Project
Remodeling - General Project

+8

Response time1 day
13 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for LMA Designs and Fabrications LLC
LMA Designs and Fabrications LLC
5.0(
6
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 1999

Free estimates

Customers say: Quick response

"Full bathroom remodel. Lou from LMA Design was great to work with. I appreciated that he always wanted things done the right way. The work was finished on schedule and on budget and I was kept aware of the jobs progression throughout. Once completed, all debris was removed and the entire bathroom was cleaned. I would definitely recommend."
Kitchens
Kitchens
Kitchens
Kitchens
Kitchens

+32

Response time5 hrs
Response rate87%
Recommended by100%of homeowners
Avatar for Diamond Interiors LLC
Diamond Interiors LLC
5.0(
9
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"I recently hired Diamond Interiors to remodel my home, and I couldn’t be happier with the results. From start to finish, their team was professional, detail-oriented, and truly committed to delivering top-quality work. Every step of the project was handled with care, clear communication, and craftsmanship that exceeded my expectations. The transformation of my home is incredible—beautiful finishes, clean lines, and thoughtful touches throughout. They stayed on schedule, kept the workspace tidy, and made the entire process stress-free. It’s rare to find a contractor who combines skill, reliability, and pride in their work the way Diamond Interiors does. I highly recommend them to anyone considering a remodel. Outstanding job—thank you, Diamond Interiors! From Dan W."
Custom fireplace
Kitchen
Bathroom
Bensalem house
Kitchen

+102

Response time2 days
5 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for JWL Construction
JWL Construction
5.0(
3
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"The professionalism and quality was superb. From the very first consult to the last day the owners were available to answer any questions. They walked thru the process from step one. Wendy even assisted with design. Staff always cleaned up everyday and they even became friends with my two dogs. You hear about nightmare remodels but mine was wonderful and it was a large job. Can’t wait for them to do my next project."
Recommended by100%of homeowners
Avatar for JMD Builders LLC.
JMD Builders LLC.
4.8(
4
)

Serving Williamstown, NJ and surrounding areas

Approved

Super Service Award Winner

Free estimates

Warranties offered

Customers say: Quick response

General Remodeling business locally owned and operated we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Additional Photos
Additional Photos

+20

Response time3 days
3 neighbors recently requested a quote
Recommended by100%of homeowners
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FAQs for basement remodeling projects in Williamstown, 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 Williamstown, NJ homeowners’ guide to basement remodelings

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