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  • Average homeowner rating star icon4.8
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  • Verified reviews icon36
    Verified basement remodels reviews

Find Basement remodelers in Mahwah

Avatar for EMILCO Construction, LLC

EMILCO Construction, LLC

4.93(
15
)
Approved Pro

EMILCO Construction, LLC

4.93(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
22 years of experience

Emilco Construction LLC is an independent general contracting firm that not only delivers impeccable results but prioritizes its clients. We know just how stressful a new project can be. Overseeing a development can take a real toll on somebody, especially if they don’t have the right general contracting team by their side. It takes a lot of hard work, long hours and a particular care to details in order to accomplish and follow through on a vision. Although working on improving your home or business is exciting, we understand that success relies mainly on hiring the right crew for the job!

"Emile is a great contractor and I highly recommend him reservation to anyone looking to upgrade or do a home renovation project. He helped us renovate our primary bathroom (completely, down to the studs and completely changing the layout), created a main floor laundry room, and an extra bedroom. Emile provided a comprehensive estimate, which was accurate, and he finished the entire job within the agreed upon time frame within the estimate. His crew were complete professionals, polite, and did excellent work. We could not be happier with the results and our new spaces. The rooms are beautiful. He went above and beyond in all respects, even when I decided to make changes to the design along the way, he was able to roll with them and told me how much various options would cost and other pros and cons of those options (tiling the whole bathroom vs partial, heated floors or no, different types of fixtures, etc)."

Erin L on April 2024

Emilco Construction LLC is an independent general contracting firm that not only delivers impeccable results but prioritizes its clients. We know just how stressful a new project can be. Overseeing a development can take a real toll on somebody, especially if they don’t have the right general contracting team by their side. It takes a lot of hard work, long hours and a particular care to details in order to accomplish and follow through on a vision. Although working on improving your home or business is exciting, we understand that success relies mainly on hiring the right crew for the job!

"Emile is a great contractor and I highly recommend him reservation to anyone looking to upgrade or do a home renovation project. He helped us renovate our primary bathroom (completely, down to the studs and completely changing the layout), created a main floor laundry room, and an extra bedroom. Emile provided a comprehensive estimate, which was accurate, and he finished the entire job within the agreed upon time frame within the estimate. His crew were complete professionals, polite, and did excellent work. We could not be happier with the results and our new spaces. The rooms are beautiful. He went above and beyond in all respects, even when I decided to make changes to the design along the way, he was able to roll with them and told me how much various options would cost and other pros and cons of those options (tiling the whole bathroom vs partial, heated floors or no, different types of fixtures, etc)."

Erin L on April 2024


"Excellent work, attentive to details, gives job details and steps in writing."

Ali M on May 2022

We do quality work at a fair price. References are available upon request. Quality workmanship. I listen to the consumers needs and offer suggestions and advice. Quality home cleaning services available.

"Excellent work, attentive to details, gives job details and steps in writing."

Ali M on May 2022


Avatar for JFHaderi, LLC

JFHaderi, LLC

4.76(
51
)
Approved Pro

JFHaderi, LLC

4.76(
51
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
11 local quotes requested

Here at JFH Construction, we take great pride in providing quality and professional services to the Staten Island community. We specialize in all phases of drywall installation and repair, as well as plastering and plaster repair. We can also finish the job with our quality painting services. This provided our clients with start to finish service and with a job done right. Just give us a call today and schedule an appointment. We look forward to meeting you.

"I hired Joni to completely renovate my property, and unfortunately, it was a very disappointing experience. He wasted a lot of my time because he didn?t know how to properly complete the paperwork needed to obtain permits. He also works with only one person, which made it unrealistic for him to take on such a large project. As a result, the renovation took far longer than expected. Throughout the process, I had many disagreements with him. He later brought in workers to install the tiles, but the job was done very poorly?the floors are uneven and wavy. The entire renovation took over a year, and even then, he didn?t finish the work. His excuse was that his worker had been detained by federal authorities (ICE). Overall, I do not recommend hiring Joni for any renovation projects."

Michael B on November 2025

Here at JFH Construction, we take great pride in providing quality and professional services to the Staten Island community. We specialize in all phases of drywall installation and repair, as well as plastering and plaster repair. We can also finish the job with our quality painting services. This provided our clients with start to finish service and with a job done right. Just give us a call today and schedule an appointment. We look forward to meeting you.

"I hired Joni to completely renovate my property, and unfortunately, it was a very disappointing experience. He wasted a lot of my time because he didn?t know how to properly complete the paperwork needed to obtain permits. He also works with only one person, which made it unrealistic for him to take on such a large project. As a result, the renovation took far longer than expected. Throughout the process, I had many disagreements with him. He later brought in workers to install the tiles, but the job was done very poorly?the floors are uneven and wavy. The entire renovation took over a year, and even then, he didn?t finish the work. His excuse was that his worker had been detained by federal authorities (ICE). Overall, I do not recommend hiring Joni for any renovation projects."

Michael B on November 2025


Avatar for JOHANNEMANN AND SONS GENERAL CONTRACTING LLC

JOHANNEMANN AND SONS GENERAL CONTRACTING LLC

5.00(
23
)
Approved Pro

JOHANNEMANN AND SONS GENERAL CONTRACTING LLC

5.00(
23
)
Approved Pro
74 local quotes requested
5 years of experience

We' are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Make your life easy - just hire Robert Johannemann & Sons for your new roof and don't waste time getting lots of other quotes from other roofing contractors. Robert is extremely good at what he does & has a fantastic crew working with him. His quote was the best one we got; & just a week after we met, my new roof was completely done. His professionalism is exceptional, there was no pressure to do more work than I thought my old house needed & the final bill was exactly what we agreed upon. He has an incredible piece of machinery to collect all the old shingles, and I'd never work with a roofer who does not have this. It's a tractor with a small dumpster on it that is raised right up to the roof they are working on. This means thousand of pounds of shingles are NOT thrown down to CRUSH your landscape and lawn. Nobody spends all day picking up junk on the ground; the whole crew is laying down new shingles instead. So Robert finishes quickly & does a great job at a real fair price!"

Christopher S on November 2025

We' are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Make your life easy - just hire Robert Johannemann & Sons for your new roof and don't waste time getting lots of other quotes from other roofing contractors. Robert is extremely good at what he does & has a fantastic crew working with him. His quote was the best one we got; & just a week after we met, my new roof was completely done. His professionalism is exceptional, there was no pressure to do more work than I thought my old house needed & the final bill was exactly what we agreed upon. He has an incredible piece of machinery to collect all the old shingles, and I'd never work with a roofer who does not have this. It's a tractor with a small dumpster on it that is raised right up to the roof they are working on. This means thousand of pounds of shingles are NOT thrown down to CRUSH your landscape and lawn. Nobody spends all day picking up junk on the ground; the whole crew is laying down new shingles instead. So Robert finishes quickly & does a great job at a real fair price!"

Christopher S on November 2025


Avatar for Proworks Interiors

Proworks Interiors

5.00(
6
)
Approved Pro

Proworks Interiors

5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
13 years of experience

Transform your home with Proworks Interiors. Our expert team in the Tri-State Area specializes in finished basements, Bathrooms, Kitchens, and renovations. Experience top-notch craftsmanship and attention to detail. Contact us today for your home transformation needs.

"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 !"

Morgan V on December 2024

Transform your home with Proworks Interiors. Our expert team in the Tri-State Area specializes in finished basements, Bathrooms, Kitchens, and renovations. Experience top-notch craftsmanship and attention to detail. Contact us today for your home transformation needs.

"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 !"

Morgan V on December 2024


Avatar for Longo Constuction & Electrical Inc

Longo Constuction & Electrical Inc

4.92(
12
)
Approved Pro

Longo Constuction & Electrical Inc

4.92(
12
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 local quotes requested

Longo Construction Electrical Company my name is ALEX LONGO and I am the Owner I started the business 34 years ago .We are a full service company we are license for construction we are license for electrical and we are license for building we take care of designing We also have architects for bigger project I work closely with all my clients I gave my clients my cell number so they can reach me anytime of the day day or evening I also gave him my 24 hour number in case of an emergency I'm always available from start to finish on projects if you want a free estimate please give me a call I do estimates During the day or evenings and on Saturdays . We take care of small medium and large jobs I have my guys that work for me over 20 years you're free to leave the house with my care . We are fully insured.

"It went well. They did take a while to start because he was down workers."

Lisa T on April 2023

Longo Construction Electrical Company my name is ALEX LONGO and I am the Owner I started the business 34 years ago .We are a full service company we are license for construction we are license for electrical and we are license for building we take care of designing We also have architects for bigger project I work closely with all my clients I gave my clients my cell number so they can reach me anytime of the day day or evening I also gave him my 24 hour number in case of an emergency I'm always available from start to finish on projects if you want a free estimate please give me a call I do estimates During the day or evenings and on Saturdays . We take care of small medium and large jobs I have my guys that work for me over 20 years you're free to leave the house with my care . We are fully insured.

"It went well. They did take a while to start because he was down workers."

Lisa T on April 2023


Avatar for BAS Construction

BAS Construction

5.00(
41
)
Approved Pro

BAS Construction

5.00(
41
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
24 local quotes requested

BAS Construction is a Full Service Home Improvement and Remodeling Company. We do it all, Basement Remodeling & Finishing, Kitchen Improvement, Bathroom Improvement, Painting, Siding, Home Improvement, etc. You name it, we do it. Our Company is fully Insured and Certified. We offer only the highest quality services to our customers while keeping the cost affordable to your budget.

"It was a great experience. Sina and his team were professional and took great care to do a great job. They constantly had new ideas to make the process better and worked with me on ideas I had. Best contractors I have ever worked with."

Sameer A on July 2022

BAS Construction is a Full Service Home Improvement and Remodeling Company. We do it all, Basement Remodeling & Finishing, Kitchen Improvement, Bathroom Improvement, Painting, Siding, Home Improvement, etc. You name it, we do it. Our Company is fully Insured and Certified. We offer only the highest quality services to our customers while keeping the cost affordable to your budget.

"It was a great experience. Sina and his team were professional and took great care to do a great job. They constantly had new ideas to make the process better and worked with me on ideas I had. Best contractors I have ever worked with."

Sameer A on July 2022


Avatar for Owens Corning Basement Finishing System

Owens Corning Basement Finishing System

4.75(
73
)
Approved Pro

Owens Corning Basement Finishing System

4.75(
73
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
200 local quotes requested

Lux Renovations, LLC, has been serving New England homeowners since 2002. We've finished over 8000 basements in New England, usually in 2-3 weeks. Our dedication to customer experience and satisfaction has won us Owens Corning's top customer service ranking nationally for the last 8 years in a row. Something like that does not happen by accident. We are committed to insuring that all of our customers describe their experience with us as "the best contractor experience I ever had". If you are considering a basement finishing project please allow us to show you how Owens Corning has changed the industry with this unique system. A no-charge consultation and design is available. Give us a call today!

"Lux project manager and staff were great! Great attention to detail."

Brian C on December 2022

Lux Renovations, LLC, has been serving New England homeowners since 2002. We've finished over 8000 basements in New England, usually in 2-3 weeks. Our dedication to customer experience and satisfaction has won us Owens Corning's top customer service ranking nationally for the last 8 years in a row. Something like that does not happen by accident. We are committed to insuring that all of our customers describe their experience with us as "the best contractor experience I ever had". If you are considering a basement finishing project please allow us to show you how Owens Corning has changed the industry with this unique system. A no-charge consultation and design is available. Give us a call today!

"Lux project manager and staff were great! Great attention to detail."

Brian C on December 2022


Avatar for Vision Home Innovation, LLC

Vision Home Innovation, LLC

5.00(
3
)
Approved Pro

Vision Home Innovation, LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
15 years of experience

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"It was truly a pleasure working with everyone from Vision Home Innovation. They are a family owned company and all work together to cater to their customers. They did a fabulous job installing the carpet in our home. We will definitely be calling them again in the future. Thank you for everything!"

Elia L on August 2024

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"It was truly a pleasure working with everyone from Vision Home Innovation. They are a family owned company and all work together to cater to their customers. They did a fabulous job installing the carpet in our home. We will definitely be calling them again in the future. Thank you for everything!"

Elia L on August 2024


Avatar for RWS Homes, LLC

RWS Homes, LLC

4.69(
38
)
Approved Pro

RWS Homes, LLC

4.69(
38
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
48 local quotes requested

Visit Our New Website! www.RWSBuild.com RWS Building & Remodeling specializes in residential and commercial construction services, including design/build, home additions, add-a-level, and whole house remodeling. Our highly skilled and experienced craftsmen have provided construction and remodeling solutions, at competitive rates, for homeowners and businesses throughout Rockland and Northern Bergen Counties. For additional information or to arrange a consultation for your project at your Bergen County or Rockland County home or business, please contact RWS Building & Remodeling at 201-749-1001 or 845-213-2131. We would love to be a part of your next project!

"Wonderful experience with Rob and his crew. We have gone through construction before, and nothing compares to RWS. Excellent work, attention to the little details was so impressive. The crew becomes your friends, you can trust them 1000%. We are over the moon with the results. Better than I could ever have imagined and I had a specific vision."

Deborah M on April 2020

Visit Our New Website! www.RWSBuild.com RWS Building & Remodeling specializes in residential and commercial construction services, including design/build, home additions, add-a-level, and whole house remodeling. Our highly skilled and experienced craftsmen have provided construction and remodeling solutions, at competitive rates, for homeowners and businesses throughout Rockland and Northern Bergen Counties. For additional information or to arrange a consultation for your project at your Bergen County or Rockland County home or business, please contact RWS Building & Remodeling at 201-749-1001 or 845-213-2131. We would love to be a part of your next project!

"Wonderful experience with Rob and his crew. We have gone through construction before, and nothing compares to RWS. Excellent work, attention to the little details was so impressive. The crew becomes your friends, you can trust them 1000%. We are over the moon with the results. Better than I could ever have imagined and I had a specific vision."

Deborah M on April 2020

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Basement Remodel questions, answered by experts

Adding an extension or addition to your home costs more than a loft conversion in all but the rarest cases where the home's structural integrity is lacking. Because a home addition requires a new foundation section or significant structural upgrades to handle a cantilevered portion, the cost compared to almost any loft conversion is significantly greater for the same square footage.

Yes, you’ll use a macerator pump to install a basement bathroom without breaking concrete. The purpose of breaking into concrete is to connect the drain pipes to the main sewer line. But a macerator pump will bypass this step and break up solids until they are soft enough to pass through a discharge pipe. That pipe will carry the waste to the sewage line.

Unless you have extensive experience in construction work, remodeling a basement is best left to a professional. There are several tasks associated with this project that require exact precision, including:

  • Replacing insulation 

  • Replacing carpet or other flooring 

  • Adding heating and cooling

  • Adjusting or adding walls and doors

  • Altering or adding plumbing elements

If any of these elements is done incorrectly, it could severely impact the quality of your basement remodel and be dangerous. Changing a basement often comes with code safety requirements, like egress windows and proper ventilation. Therefore, leaving it up to a professional is often the best decision.

Installing a bathroom in a basement isn’t a project for most homeowners. Many parts—plumbing, electricity, and carpentry—go into this project, each requiring expert-level knowledge and tools. One miscalculation can lead to very expensive repairs. Plus, some homeowner’s insurance might not pay for damages caused by a homeowner DIYing this project. You can protect yourself by allowing the pros to complete this job for you. 

It is generally more affordable to finish a basement than an attic, though it ultimately depends on how you plan to use the space. The average cost to finish a basement ranges from $7 to $23 per square foot, while attic renovation costs $30 to $60 per square foot. However, a simple attic conversion to a storage space will cost significantly less.

The Mahwah, NJ homeowners’ guide to basement remodels

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