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Find Basement remodelers in Portsmouth

Avatar for JCS Remodeling LLC
JCS Remodeling LLC
5.0(
15
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"Chris was very professional and provided me with some great advice for my bathroom remodel. The before and after photos were incredible! My tiny bathroom now looks huge!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+91

3 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for DC57 Construction
DC57 Construction
5.0(
68
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

Super Service Award Winner

Emergency services offered

Customers say: True professional

"As all the previous reviewers have said, DC 57 Construction is definitely a 5 star company. Lucas came to my home 3 times and helped me plan out the job. The job included: rebuilding a wood ladder to the upstairs loft, installing a railing and a new door in the loft, and adding shelves in the bathrooms. In addition, Lucas installed two railings for my back deck. Lucas and Tiago are both finish carpenters and they do excellent work at a very reasonable price. I am having Lucas come back soon to install a new screen door. Hiring Lucas and Tiago was definitely a great decision as my home looks much better."
Finished Carpentry and Woodworking Project
Finished Carpentry and Woodworking Project
Finished Carpentry and Woodworking Project
Finished Carpentry and Woodworking Project
Finished Carpentry and Woodworking Project

+27

Response time1 day
1 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Top Down Remodeling
Top Down Remodeling
5.0(
8
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Victor did a very professional job. He renovated our kitchen and basement. He did a great job managing the projects. He kept us informed of the schedule and who was coming to the house to do the work. He showed creativity and flexibility in the design and execution and was overall a pleasure to work with. We would use Victor again for future projects."
Additional Photos
Additional Photos
Additional Photos
Half bath
Half Bath

+17

Response time2 days
Response rate100%
2 neighbors recently requested a quote
Avatar for Ocean Break Remodel, LLC
Ocean Break Remodel, LLC
5.0(
19
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

In business since 1999

Free estimates

Small jobs welcome

"We hired Ocean Break Remodel to finish our small basement (~225 sq ft). Peter and his crew were great to work with and in addition to doing high quality work, they also finished on schedule and within budget. I am very glad we chose to work with them and would highly recommend them."
kitchen remodel
Framing an Addition
finished addition
exterior cedar shingling Little Compton RI
wooden shingles siding

+90

Response time1 day
Response rate88%
Recommended by94%of homeowners
Avatar for L2 Homes
L2 Homes
5.0(
15
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"NML Legacy was very responsive and quick to schedule. They prepared our space taking care of our belongings, completed the task start to finish and followed up to ensure we were pleased with the final result. Would recommend!"
Rubber Roof Install
Roof Replacement
Roof Replacement
Roof Replacement
Complete Home Renovation

+8

10 neighbors recently requested a quote
Avatar for RAM Builder Services LLC
RAM Builder Services LLC
4.9(
24
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

RAM Builder Services, LLC is a Rhode Island–based residential and light commercial contractor focused on practical, code‑compliant projects rather than flashy cosmetic work. The company specializes in basement remodeling and finishing, acoustical/suspended ceilings, framing, drywall, and general interior carpentry, with experience coordinating around existing mechanicals and occupied spaces.\n\nHow the business operates:\n\nRAM Builder Services is owner‑operated, with the owner directly handling estimating, planning, and on‑site coordination. Projects are approached systematically: detailed walkthroughs, scope clarification, written estimates, and clear communication on sequencing, timelines, and change orders. The business places a strong emphasis on structural soundness, moisture management (especially in basements), and building‑code compliance in Rhode Island.

Basement Bathroom
Theater Wall
Entertainment Center
Game Room
Below Stairs

+4

3 neighbors recently requested a quote
Recommended by68%of homeowners
Avatar for Cedar Coast Construction, Inc.
Cedar Coast Construction, Inc.
5.0(
20
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"We had a complete front entry remodel done. The project involved tearing out old front stairs and building a new entryway with awning. The project came out beautifully!! Even better than I had imagined. Jeff and his team were great to work with and very talented. We really could not be any happier with the results."
Burien Deck
Burien Deck
Burien Deck
Burien Deck
Burien Deck

+104

Response time2 days
8 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Clear Choice Home Improvements, LLC
Clear Choice Home Improvements, LLC
4.5(
976
)
Basement - Remodel

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"I had a roof replacement and new leaf guard gutters installed. Both projects went smoothly . They started and finished on time, and their workmanship was great. The team of people that worked the project - the initial salesman visit, the contract, the office project manager, to the site install team where all professional and truly dedicated to insuring the work was acceptable to my standards. I highly recommend getting a quote from Clear Choice when planning home improvement projects."
Exterior 1
Exterior 2
Exterior 3
Exterior 4
Roof 1

+132

Recommended by92%of homeowners
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FAQs for basement remodeling projects in Portsmouth, RI

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 Portsmouth, RI homeowners’ guide to basement remodelings

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