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Find Basement remodelers in Portsmouth

Avatar for JCS Remodeling
JCS Remodeling
5.0(
15
)

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"Jcs remodeling did a fantastic job on my bathroom I love their work.they worked really hard to bring out my vision and they exceeded all of my expectations. I will definitely recommend jcs remodeling for any home remodeling and will be using them for future projects."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+91

4 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Custom Construction Services LLC
Custom Construction Services LLC
5.0(
20
)

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Custom Construction did an excellent job painting bedrooms and hallway walls, ceilings and trim and bathroom ceiling. They contacted us quickly with an estimate, and responded promptly during the job. Very professional and courteous, on time, cleaned up every day. They were meticulous with their work and their crew finished efficiently. We are very happy with the work they did and would hire them again. Highly recommend them"
Home Addition
Bathroom Remodel
Bathroom remodel
Exterior House Paint Project
New Deck Build

+245

Response time12 hrs
13 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Top Down Remodeling
Top Down Remodeling
5.0(
8
)

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
7 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for Ocean Break Remodel, LLC
Ocean Break Remodel, LLC
5.0(
19
)

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%
1 neighbors recently requested a quote
Avatar for RAM Builder Services LLC
RAM Builder Services LLC
4.9(
24
)

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

1 neighbors recently requested a quote
Recommended by68%of homeowners
Avatar for L2 Homes
L2 Homes
5.0(
13
)

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

7 neighbors recently requested a quote
Avatar for Cedar Coast Construction, Inc.
Cedar Coast Construction, Inc.
5.0(
20
)

Serving Portsmouth, RI and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"I had two bathrooms completely gutted and remodeled, new windows installed with new interior and exterior trim throughout the house, and a chimney removed. The work was beautifully done. The finished bathrooms and window installations were amazing. The contractor was always quick to respond to texts and calls whenever I had questions. He also gave me a lot of valuable advice and ideas that helped make the project go smoothly. The overall experience and outcome exceeded my expectations."
Burien Deck
Burien Deck
Burien Deck
Burien Deck
Burien Deck

+104

Response time2 days
4 neighbors recently requested a quote
Recommended by84%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.