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Find Basement remodelers in Portsmouth

Avatar for Mid-State Basement Systems
Mid-State Basement Systems
5.0(
13
)

Serving Portsmouth, OH and surrounding areas

Approved

In business since 1986

Free estimates

Emergency services offered

"Mid-State Basement Systems came highly recommended by a good friend from Buffalo, NY and they did not disappoint. From start to finish they were very professional yet personable. Larry & Phil in the initial stages of the basement inspection and a reasonable quote. Silvino and his team who done the actual work was incredible, done with absolute excellence. They were here when they said they would be and finished the job a day ahead of schedule. I am thoroughly pleased with this company, first class. I highly recommend them if you need work done on your basement.******"
Before
After
Clean Space After
Crawl Space Before
Foundation Before

+2

Response time2 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for M&W Contracting
M&W Contracting
4.8(
17
)

Serving Portsmouth, OH and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"M&W Contracting did an exceptional job on our new deck. Very nice and professional crew. Demolished our old deck and built the new one in five days. Will highly recommend to everyone"
Vanity/Vanity Top
Master Bath Remodel
Guest Bathroom
Bathroom Closet
Mosaic Tile

+7

Response time2 days
70 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Mcneal Construction LLC
Mcneal Construction LLC
5.0(
3
)

Serving Portsmouth, OH and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"Matthew was the right guy for the work I needed done on my home! He was very quick and very well priced for the work that he did and I would highly recommend him to anybody needing work done on their home. I had him replace rotted window sill and completely reframe for new windows I had installed by him and I had also inspect other windows for rot and had new exterior trim installed to give my home a new look! I also had roughly 40’ of facia board replaced and new facia trim installed due to rot and he did a great job!"
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
3 neighbors recently requested a quote
Recommended by66%of homeowners
Remember Remodeling
New to Angi

Serving Portsmouth, OH and surrounding areas

Approved

In business since 2018

Free estimates

We are a locally owned and operated company that values honesty, 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 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!

Response time4 days
Knittels Construction
5.0(
7
)

Serving Portsmouth, OH and surrounding areas

In business since 2015

Free estimates

Offers commercial services

"Chris and his team are hands down the best general contractors in southern Ohio. I hired him to do a total remodel in 2025, on a house that I purchased to flip. He was quick, efficient, and his quote was excellent. I’m a real estate broker and I’m picky about who I hire. I would not use anyone else and I will definitely hire him again."
New porch in Portsmouth
Metal roof
Cabin
Cabin
Cabin

+20

2 neighbors recently requested a quote
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FAQs for basement remodeling projects in Portsmouth, OH

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, OH homeowners’ guide to basement remodelings

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