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Best basement remodelers near Grantham, NH

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Top-Rated Basement remodelers in Grantham - Updated Nov 2026

Avatar for Owens Corning Basement Finishing System
Owens Corning Basement Finishing System
4.5(
533
)
Basement - Remodel

Serving Grantham, NH and surrounding areas

Approved

Super Service Award Winner

In business since 1990

Free estimates

Warranties offered

"I couldn’t be happier with the work Owens Corning Basement did remodeling my basement! From start to finish, they were professional, courteous, and attentive to every detail. The team completed the project on time and within budget, keeping me informed throughout the process. The finished basement looks amazing—bright, functional, and exactly what I envisioned. I highly recommend Owen Corning Basement to anyone looking for high-quality remodeling work!"
Media Room Before
Media Room After
Games Room Before
Games Room After
Living Room Before

+128

Response time11 hrs
64 neighbors recently requested a quote
Recommended by69%of homeowners
Avatar for Edgewood Drywall Services
Edgewood Drywall Services
4.8(
41
)
Basement - Remodel

Serving Grantham, NH and surrounding areas

Approved

In business since 2000

Free estimates

Customers say: True professional

Edgewood Drywall Services invites you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. Give us a call for a free estimate!

Projects
Projects
Projects
Projects
Projects

+20

1 neighbors recently requested a quote
Recommended by60%of homeowners
Avatar for Greater Northeastern Construction
Greater Northeastern Construction
5.0(
3
)
Basement - Remodel

Serving Grantham, NH and surrounding areas

Approved

In business since 1979

Credit card accepted

Offers commercial services

Greater Northeastern Construction is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 35 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

My jobs
My jobs
My jobs
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Granite State Interiors LLC
Granite State Interiors LLC
5.0(
3
)
Basement - Remodel

Serving Grantham, NH and surrounding areas

Approved

Free estimates

Credit card accepted

Granite State Interiors LLC is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

Fireplace Makeover
Fireplace Makeover
Tile Shower
Tile Shower
Before

+8

1 neighbors recently requested a quote
Sonart Construction Corp.
2.3(
7
)
Basement - Remodel

Serving Grantham, NH and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

Sonart Construction Corp. has over15 years of experience in providing a variety of exterior and interior renovation services. We provide services to Palm Beach, Broward and Miami-Dade Counties.. We specialize in Bathroom Remodeling, Kitchen Remodeling, Flooring and the list goes on. Customer satisfaction is what determines our success, which is why we take a hands-on approach and keep the customer informed through every phase of the project. When interacting with our company, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing, and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your renovation needs. Give us a call today!

Avatar for Howland Home Services
Howland Home Services
4.9(
26
)
Basement - Remodel

Serving Grantham, NH and surrounding areas

In business since 2005

Free estimates

Small jobs welcome

"Steve and his crew far exceeded my expectations on the screen porch build they recently finished. The quality of the job is fantastic. On top of that, Steve was right on time for the first estimate meeting, to the delivery of the materials, to the start and finish dates of the project (2 days from start to finish. The price was fair and there were no surprises. Steve also recommended we use a composite material, called Azek to trim the job out. Gorgeous! You can stop looking and just hire Howland Home Services for your project. You will not be disappointed!"
Our work
Our work
Our work
Our work
Our work

+49

Response time1 day
Recommended by100%of homeowners
J & L Exteriors
4.9(
7
)
Basement - Remodel

Serving Grantham, NH and surrounding areas

In business since 2009

Free estimates

"Overall it went pretty well.  They stared early and stayed late to make up time lost for rain.  They were very concientious about picking up every day.  John and his entire crew were very friendly and respectful. 

At first I wasn't very pleased with the number of visible seams in the flashing on the roof facing the driveway.  The roof is very "wavy" due to the settling of our ancient house and apparently the seams were unavoidable.  Everything has settled more and it is fine.  What is most important is that John talked to us about it and wanted to do anything he could to make sure we were happy with the job.

We would hire him again for work.  He seems to love what he does and he wants to make sure his customers are happy and it shows."
Recommended by100%of homeowners
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Basement Remodel FAQs, answered by experts

To determine if your basement walls are suitable for finishing, assess their structural integrity and moisture conditions. Look for any signs of damage, such as cracks, bowing, or excessive moisture. Ensure proper drainage and address any underlying issues before proceeding. 

Consult with a professional if you're uncertain about the structural stability or potential risks associated with finishing your basement walls.

Walkout basements are not generally included in a home’s square footage, although they may be if they meet certain conditions that depend on local regulations. A finished walkout basement used as a living space may be counted toward square footage in some locations as long as all codes for livable space are met.

You should always use high-quality lumber for your framing in order to ensure it will last the test of time and resist moisture. Use 2-foot by 4-foot lumber that is pressure-treated for your framing.

It’s less expensive to finish your basement than it is to build an addition to your home. The average cost to refinish a basement is $32,000 (between $7 and $23 per square foot) while building an addition to your home costs $50,325 ($80 to $210 per square foot). Depending on the size of your basement and other factors, like moving plumbing and electrical, refinishing a basement is a more cost-effective option in most cases.

Professional remodelers streamline the process, manage permits, and handle renovations efficiently—significantly mitigating risk while maintaining standards.

The Grantham, NH homeowners’ guide to basement remodels

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