Top-rated basement remodelers.

Get matched with top basement remodelers in Alton Bay, NH

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 Alton Bay

Avatar for NH Projects LLC
NH Projects LLC
5.0(
19
)

Serving Alton Bay, NH and surrounding areas

Approved

In business since 2021

Free estimates

Customers say: Quick response

"Lenny and Nick are great to work with! We are finishing our basement and they just completed the bathroom to start and it came out fantastic! They have excellent contacts to help with the plumbing and electricity and made the whole process easy for us. We can't wait to keep working with them and completing our basement."
Our Work
Our Work
Our Work
Our Work
Our Work

+8

Response time5 hrs
2 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for MMP Construction Inc
MMP Construction Inc
4.7(
191
)

Serving Alton Bay, NH and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"We had a very small roof area need to be repaired. I sent request to multiple company to give a service quote. Few of them sent me replies and stated that they are too busy to come. Matt of MMP Consturction's contacted me promptly, scheduled an on-site visit and gave us a quote right away. The work was then scheduled and finished quickly. Matt did great job on reaching out, effective communication, and always arriving on-time. He also gave an evaluation on our roof condition. Also, Eric and Don did excellent job on finishing the project. They are all very polite, knowledgeable, and showed their professionalism. We would like to express our sincere appreciation to Matt and his crew. We are very grateful for having them arriving on-time before the winter storm to prevent potential damage of the house. From their react, we see a warm heart. No job is big or small, all jobs are equally important. Understanding the difficulties of others, for the people, been appreciated by the people. Thank you again for your high quality service. We definitively recommend MMP Construction Inc. to anyone for any related home project."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+154

1 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Anything & Everything Home Improvement LLC
Anything & Everything Home Improvement LLC
4.8(
59
)

Serving Alton Bay, NH and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"Jesse and his veteran crew of subs built a large log home for us. These are tricky homes to build. Any unexpected events were handled professionally. We plan to hire him again to renovate the unfinished basement."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+53

2 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Straight Line Construction LLC
Straight Line Construction LLC
5.0(
4
)

Serving Alton Bay, NH and surrounding areas

Approved

In business since 2014

Offers commercial services

"Josh and team are reliable, honest and trustworthy. The work has been good and if anything is needed after the fact, they always come back. I have had them do several remodels for me. No complaints. "
1 neighbors recently requested a quote
Avatar for DALLASTRA CONSTRUCTION LLC
DALLASTRA CONSTRUCTION LLC
5.0(
4
)

Serving Alton Bay, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Bathroom remodeling
Bathroom remodeling
Bathroom remodeling
Bathroom Remodling
Bathroom Remodling

+7

Response time2 hrs
Response rate100%
3 neighbors recently requested a quote
Bear Island Builders
5.0(
3
)

Serving Alton Bay, NH and surrounding areas

Approved

In business since 2008

Free estimates

Offers commercial services

With over 10 years experience in the home maintenance industry, Bear Island Builders is your industry expert in Gilmanton. We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!

Response time4 hrs
Recommended by100%of homeowners
...
Showing 1-10 of 132
FAQs for basement remodeling projects in Alton Bay, NH

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 Alton Bay, NH homeowners’ guide to basement remodelings

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