Basement Finishing in Potomac
This is the cheapest square footage you can add — if it is finished legally. We are a licensed contractor in Maryland (MHIC #111971) — we pull the permits through the Montgomery County Department of Permitting Services, coordinate the licensed trades, and hand you a written line-item scope before demolition starts.
Start your Potomac basement finishing with a written scope
Tell us the two things we need to call you back — a project manager rings you to book the free walkthrough. We work Bethesda, North Potomac, Rockville and every Potomac ZIP: 20854.
- A written, line-item scope for your Potomac project before anyone swings a hammer
- Permits pulled through the Montgomery County Department of Permitting Services under MHIC #111971
- One project manager from demolition to final walkthrough
Two fields and one question. A specialist calls you back to confirm a time.
The paperwork is the part most contractors gloss over.
A finished basement needs a building permit and, in almost every case, electrical, plumbing and mechanical permits alongside it. Two code requirements decide whether the space is legal: any room used for sleeping needs proper emergency egress, and habitable space needs a minimum finished ceiling height. The framing and rough-in inspection has to pass before insulation and drywall — get that wrong and the drywall comes back off.
Your Potomac permit goes through the Montgomery County Department of Permitting Services. We pull it under our license and we hold the inspection schedule — you do not chase inspectors and you do not sign the application.
A lot of Potomac sits outside Montgomery County's public water and sewer envelope, which means well and septic. That matters more than homeowners expect: adding a bedroom — in an addition or a finished basement — can require a septic capacity review before the county will permit it, because bedroom count is how septic systems are sized. On a large-lot Potomac property this is the first thing to check, not the last.
The house decides half the scope.
Potomac is large-lot housing — much of it 1960s–1980s with substantial later renovation, plus newer custom construction. Many neighborhoods also carry HOA covenants requiring architectural approval for exterior changes, which runs on a separate track from the county permit.
What's included- ✓Permitted as habitable space, so it counts and it appraises
- ✓Egress addressed before framing if a bedroom is in the plan
- ✓Smoke and CO alarms tied into the house system
- ✓Framing and rough-in inspection passed before insulation and drywall
A planning range, not a quote. Your written line-item price comes after a free on-site walkthrough. HVAC, electrical and plumbing are performed by licensed trade partners.
Financing is available — most homeowners spread a project this size over monthly payments rather than paying cash up front.
Free Potomac walkthrough
A written, line-item scope for your basement finishing project. No design fee, no obligation.
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Legitimately excellent. If your roof qualifies to be replaced due to storm damage, go with United Developers. Anthony was with me every step of the way — through the claims process and after the install.
139 reviews at 4.9 stars across Google, and most of them are for our roofing and exterior work — that is the business we started in. The crew, the licences and the paperwork are the same ones now carrying basement finishing projects. Read all our reviews →
One contractor for the rest of the house
Our Potomac crews cover Bethesda, North Potomac, Rockville, Cabin John and every ZIP in the area — 20854.
Straight answers
Do you handle basement finishing in Potomac, MD?
Yes. United Developers is a licensed contractor in Maryland (MHIC #111971) and works throughout Potomac and Montgomery County, including 20854 and nearby Bethesda, North Potomac, Rockville.
Who pulls the permit for a Potomac basement finishing project?
We do, under our license, through the Montgomery County Department of Permitting Services. A finished basement needs a building permit and, in almost every case, electrical, plumbing and mechanical permits alongside it. Two code requirements decide whether the space is legal: any room used for sleeping needs proper emergency egress, and habitable space needs a minimum finished ceiling height. The framing and rough-in inspection has to pass before insulation and drywall — get that wrong and the drywall comes back off.
What should I expect in a Potomac home?
Potomac is large-lot housing — much of it 1960s–1980s with substantial later renovation, plus newer custom construction. Many neighborhoods also carry HOA covenants requiring architectural approval for exterior changes, which runs on a separate track from the county permit.
What does basement finishing cost in Potomac?
Most Potomac projects land in the $32k – $100k range. That is a planning range for Montgomery County, not a quote — your written price comes after a free on-site walkthrough.
Is the Potomac walkthrough and estimate free?
Yes. The walkthrough and the written scope are free and yours to keep whether or not you hire us. There is no design fee and no consultation invoice.
Can I put a bedroom in my finished basement?
Only with proper emergency egress — that means a code-compliant egress window and window well, or a walkout. It is the single most common reason a basement bedroom fails inspection or gets flagged at resale. We settle it during design, before framing, because retrofitting egress into finished walls is expensive.