Top-rated basement remodelers.

Get matched with top basement remodelers in Mountainside, NJ

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Basement remodelers in Mountainside

Avatar for Owens Corning Basement Finishing System
Owens Corning Basement Finishing System
4.5(
745
)

Serving Mountainside, 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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+40

Response time1 day
Response rate98%
249 neighbors recently requested a quote
Avatar for Heartland Village General Contracting and Handyman Services
Heartland Village General Contracting and Handyman Services
4.8(
200
)

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1994

Free estimates

Emergency services offered

"Everything went smoothly, they were professional and finished the job in a timely manner. My basement looks amazing! Total transformation. I would definitely hire Harvey and his crew again."
FLOORING
Remodel basements
Bathroom renovation
KITCHEN REMODEL
Decks

+151

Response time1 day
6 neighbors recently requested a quote
Recommended by94%of homeowners
The Better Basement Company
4.3(
31
)

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2003

Free estimates

Warranties offered

"We just had our basement finished. Not re-finished but finished for the first time. The house was built in 1924 with a dirt floor in the basement and low hanging pipes, overall a very challenging job. We wanted to turn it to a family room with a full bath, laundry room, closets, etc. Joe's guys (Chico and Javier) did a fantastic job. They are knowledgeable, thorough, thoughtful, and creative. We would recommend them to anyone without hesitation."
 Before
 ICE CREAM BAR
 CREATIVE IDEAS
 CREATIVE OFFICE SPACE
 After

+13

Response time2 days
Response rate86%
3 neighbors recently requested a quote
Avatar for Indigo Construction Co.
Indigo Construction Co.
5.0(
20
)

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"We couldn’t have replaced this door with a better expert. Ryan took measurements and photos, then recommended several doors in various price ranges. We didn’t realize how many options come with storm doors. Ryan gave us some really good recommendations and helped us make a great choice. He installed the door in a half day while we were out. Came back to a gorgeous door/screen storm door combo- something we weren’t even sure could have been done to begin with. Important to know:Throughout the entire process, Ryan was responsive and easy to reach. That’s vital in a world where ghosting is the norm (unfortunately). Ryan is the expert you need for your remodeling needs. Highly recommend!"
Doors Project
Remodeling - Kitchen & Bathroom Project
Buena Vista
N. Mich
Remodeling - General Project

+64

Response time1 day
Response rate94%
5 neighbors recently requested a quote
Avatar for Prestige Design & Build Corp.
Prestige Design & Build Corp.
5.0(
40
)

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"We went with Matt and team for our kitchen remodel and the process could not have been smoother. The project was completed to our standards, on time, and within budget which is really all you can ask for from a contractor. While Matt did not give us the cheapest quote, we found the pricing fair and even asked him to complete some additional projects, like replacing our front door. Matt was professional and easy to work with and told us exactly what needed to be purchased and when which helped keep everyone on track. We would highly recommend Matt and team and plan on using them for additional projects in the future."
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 CSZ Construction
CSZ Construction
4.6(
69
)

Serving Mountainside, NJ and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"I hired Cesar and his crew to gut and renovate multiple bedrooms a kitchen and 2 bathrooms. Cesar, Armondo and Benjamin were an absolute pleasure to work with. Their knowledge, expertise and craftmanship are top notch. Cesar is easy to work with and truly cares about making sure his customers are happy. Cesar has an uncanny knack for finding a solution to any problem he encounters. I found his pricing to be very fair and reasonable and I quickly learned I could trust Cesar. If you are looking to remodel, finish off a room or repair any part of your interior, Cesar and his team should be your first call."
 ALL COLUMNS FINISH
OLD DECK
Livinroom
 PAINTING
PREPARING FOOTINGS

+168

Recommended by93%of homeowners
Avatar for American Home Remodeling Inc
American Home Remodeling Inc
4.4(
651
)

Serving Mountainside, 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
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+29

16 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Skies Are The Limit, LLC
Skies Are The Limit, LLC
4.7(
49
)

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"Adrian did some work for me and my basement was the best quality work I have a hard done I would recommend him to a lot of people Quality work is what you're looking for I appreciate his business of course I will always recommend him keep up the good work"
Kitchen Renovation
Bathroom
Bathroom Renovation
Kitchen Renovation
Bathroom Renovation

+58

5 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Gomez Vision Construction, LLC
Gomez Vision Construction, LLC
4.4(
81
)

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Jorge and his team were awesome from start to finish. I reached out to them for a company to frame and drywall my basement remodel, but after meeting with Jorge I knew the could handle the entire job from demo to finish. Jorge was great to work with and his team was great as well. Jorge can handle any project that your home may need. Highly recommend this company."
COMPLETE HOME REMODELING
job#387 house renovation
job#391
master bath
hard wood refinishing

+326

Response time3 hrs
6 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for JM Contracting Group, LLC
JM Contracting Group, LLC
4.7(
84
)

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Customers say: Quality work

"JM did a fantastic job. About 13 years ago, while living at our previous residence: JM remodeled and modernized our full Kitchen, two full bathrooms and, after many tries by other contractors, he was able to stop a leak from our roof at no charge. About 10 years ago, at our current residence , JM remodeled and modernized our full kitchen and did a unique job of updating 4 large sliding closet doors. He removed the cheap inserts, and replaced them with 1/4” high quality plywood into the frames. He then, using wood molding, he made the face of the doors look like real wood doors. Doors were stained and look like expensive oak doors! JM comes up with excellent suggestions, alternatives, and expense saving ideas. We plan on relying on his expertise when we’re ready to upgrade our Patio. All the best to JM Group!"
West Windsor NJ
First Floor MakeOver
Springfield Makeover
Master Bedroom
Living Rm

+55

Response time5 hrs
Recommended by85%of homeowners
...
Showing 1-10 of 530
FAQs for basement remodeling projects in Mountainside, 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 Mountainside, NJ homeowners’ guide to basement remodelings

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