An addition is the one project where zoning can stop you before design starts. 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.
An addition starts with zoning, not construction: setbacks, lot coverage and height limits get reviewed before a building permit is issued, and in some neighborhoods there is a stormwater or historic review on top. Then come the footing and foundation inspections, which have to pass before backfill. This is the longest-lead permit of any project we do, and it is why we start the paperwork while the design is still being drawn.
Your Gaithersburg 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.
Gaithersburg runs its own permitting for properties inside the city limits — a separate submission and separate inspectors from Montgomery County DPS. A Gaithersburg mailing address does not always mean you are inside the city, and which side of that line you are on decides where the permit goes. We confirm it before filing.
Gaithersburg spans 1960s–1980s subdivisions in the older sections and heavy 1990s–2000s townhome and single-family development further out. In the earlier neighborhoods, expect original electrical service and kitchens that have never been opened up; in the newer ones, the constraint is usually the HOA architectural review rather than the house.
What's includedA 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.
A written, line-item scope for your home additions project. No design fee, no obligation.
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Our Gaithersburg crews cover Germantown, Montgomery Village, Washington Grove, Rockville and every ZIP in the area — 20877, 20878, 20879, 20882, 20886.
Yes. United Developers is a licensed contractor in Maryland (MHIC #111971) and works throughout Gaithersburg and Montgomery County, including 20877, 20878, 20879, 20882 and nearby Germantown, Montgomery Village, Washington Grove.
We do, under our license, through the Montgomery County Department of Permitting Services. An addition starts with zoning, not construction: setbacks, lot coverage and height limits get reviewed before a building permit is issued, and in some neighborhoods there is a stormwater or historic review on top. Then come the footing and foundation inspections, which have to pass before backfill. This is the longest-lead permit of any project we do, and it is why we start the paperwork while the design is still being drawn.
Gaithersburg runs its own permitting for properties inside the city limits — a separate submission and separate inspectors from Montgomery County DPS. A Gaithersburg mailing address does not always mean you are inside the city, and which side of that line you are on decides where the permit goes. We confirm it before filing.
Most Gaithersburg projects land in the $180 – $340 / sq ft range. That is a planning range for Montgomery County, not a quote — your written price comes after a free on-site walkthrough.
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.
The build is rarely the long part — permitting and zoning review are. Expect the approval phase to run in parallel with final design, and expect us to give you a schedule that names the permit milestone rather than hiding it. We will tell you at the walkthrough if your lot has a setback or coverage problem, because that changes the whole conversation.