Remodeling & Interiors

Basement Finishing Contractor Serving Calvert St. Mary's & Charles County

Turn a bare slab and joists into a family room, guest suite, or home office, done right for Southern Maryland's damp soils. We handle egress, code, moisture control, and finishes in-house, and put a free estimate in writing before we frame a single wall.

What's included in our basement finishing service

A basement is usually the cheapest square footage you'll ever add to a home, the walls, floor, and roof are already there. But finishing one in Southern Maryland is not just framing and drywall. Between the region's high water table, clay soils, and older foundations, moisture has to be handled first or the whole project is at risk. Gray & Sons Contracting finishes basements the right way for homeowners across Calvert, St. Mary's, and Charles County, from the prep you can't see to the finishes you live with every day.

Full basement finishing

Framing, insulation, drywall, drop or drywall ceilings, lighting, and trim that turn raw space into a comfortable, warm room. Whether it's an open rec room, a media area, a playroom, or a home office, we build it to feel like part of the house rather than a cold space below it.

Egress & code

Any basement bedroom or sleeping area needs a proper egress window or door under Maryland code, a safe second way out. We cut the foundation, set the window and well, and tie it into the finished space cleanly. Beyond the code requirement, that egress opening brings in daylight that makes the whole basement feel less like a basement.

Moisture control & waterproofing prep

This is the step most homeowners never see and the one that makes or breaks a finished basement. We address exterior grading and drainage, sump and vapor management, and interior water control before any framing goes up. Southern Maryland's water table doesn't forgive a basement finished over an unsolved leak, so we solve it first.

Wet Bars Bathrooms & Guest Suites

A basement bathroom, a wet bar for entertaining, or a full guest suite with a bedroom and bath turns a finished basement into truly usable space. We rough in the plumbing, including up-flush or ejector systems where drains sit above the slab, and finish these rooms with the same tile and fixtures we'd use upstairs.

Flooring & trim

Below grade, flooring has to tolerate the occasional bit of moisture, so we lean on luxury vinyl plank, tile, and engineered products over the right underlayment. Baseboard, door casing, and finish carpentry get the same attention as the main level, so nothing about the space reads as second-rate.

Finished basement cost in Southern Maryland

A finished basement in our area typically runs between $25,000 and $55,000. Four factors move that number most: the square footage you're finishing, whether you're adding a full bathroom or wet bar (plumbing below grade is the single biggest add), how much moisture control and waterproofing prep the space needs before finishing, and the level of finish you choose for flooring, trim, and built-ins. A basement that's already dry and just needs framing and finishes lands near the low end; one that needs an egress cut, a bathroom, and drainage work sits higher. We price it after we see the actual space, in writing, with no surprises.

Signs your basement is ready to finish

  • The space stays dry through a heavy Southern Maryland rain, with no standing water or seepage
  • No musty smell, efflorescence (white chalky residue), or dark staining on the foundation walls
  • Adequate ceiling height, generally 7 feet or more once the ceiling is finished
  • A functioning sump pump and proper exterior grading that carries water away from the house
  • No active cracks weeping water or signs of past flooding
  • Room for an egress window if you want a bedroom or guest suite down there

If any of these are a problem, it's not a dealbreaker, it's just prep work that comes first. We'll tell you honestly during the estimate what your basement needs before it's finish-ready.

Materials & brands we install

Below grade, product choices matter more than they do upstairs. We install moisture-tolerant luxury vinyl plank and tile from Shaw, Mohawk, and MSI, insulate with rigid foam and mineral wool suited to below-grade walls, and hang moisture-resistant drywall where it makes sense. Egress windows come from manufacturers like Wellcraft, and we finish with Sherwin-Williams and Benjamin Moore paints. Everything goes in to manufacturer spec so the warranties hold.

Areas we serve

We finish basements throughout Calvert, St. Mary's, and Charles County across Southern Maryland, including Prince Frederick, Solomons, Lusby, Huntingtown, Dunkirk, Owings, St. Leonard, Leonardtown, California, Lexington Park, Hollywood, Waldorf, and La Plata. See our full service area.

Why homeowners choose us

Because we handle every trade in-house, a basement project never stalls waiting on a separate framer, plumber, and finish crew to coordinate. A finished basement is often the first phase of a larger whole-home remodel, and the same crew that finishes it lays the flooring throughout the house. When a basement can't add the space you need, a true bedroom suite or a bigger footprint, we also build home additions. One call, one crew, one standard of work from the foundation up.

Basement Finishing FAQs

How much does it cost to finish a basement in Calvert County?
Most finished basements in Calvert, St. Mary's, and Charles County run roughly $25,000 to $55,000. What moves the number is the square footage, whether you're adding a full bathroom or wet bar, how much moisture control and waterproofing prep the space needs, and the level of finish you choose. We measure the actual basement and put a written price in front of you before any work begins.
Do I need egress windows to finish my basement?
If your finished plan includes a bedroom or sleeping area, Maryland code requires an egress window or door for a safe second way out. We handle the whole egress package, cutting the foundation, installing the window and well, and tying it into the finished space cleanly. Even where it isn't strictly required, an egress window brings in daylight that makes a basement feel like real living space.
My basement gets damp, can it still be finished?
Usually, but the moisture has to be solved before a single stud goes up, not after. Southern Maryland's high water table and clay soils push water against foundations, so we address grading, drainage, sump systems, and vapor management as prep work. Finishing over an untreated moisture problem is the most common way a basement remodel gets ruined, and we won't do it.
Can you add a bathroom to a basement with no plumbing?
Yes. Adding a bathroom below existing drain lines usually calls for an up-flush system or a sewage ejector pit, both of which we install regularly. We rough in the plumbing, frame the room, and finish it with the same tile and fixtures we'd use anywhere else in the house, so a basement bath doesn't look like an afterthought.
What areas do you serve for basement finishing?
Calvert, St. Mary's, and Charles County across Southern Maryland, including Prince Frederick, Solomons, Lusby, Huntingtown, Dunkirk, Owings, St. Leonard, Leonardtown, California, Lexington Park, Hollywood, Waldorf, and La Plata.

Ready to reclaim your basement?

Family room, guest suite, or home office, tell us what you're picturing and we'll check the space and get you a free written estimate.