Home Additions in Chevy Chase
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.
Start your Chevy Chase home additions 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, Kensington, Somerset and every Chevy Chase ZIP: 20815.
- A written, line-item scope for your Chevy Chase 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.
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 Chevy Chase 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.
“Chevy Chase” covers several separately incorporated municipalities, and a number of them run their own building and permit review in addition to Montgomery County. Which village you are in changes who reviews your plans and what they care about — particularly for anything visible from the street.
The house decides half the scope.
The housing here is largely 1910s–1930s colonials, Tudors and Craftsman homes with plaster walls, original millwork worth protecting, and mechanical systems that have been added to rather than replaced. Kitchens and baths in these houses almost always need the electrical and plumbing rebuilt behind them, not just refinished.
What's included- ✓Zoning, setback and lot-coverage review before design is finalized
- ✓Footings placed below the regional frost line
- ✓Footing and foundation inspections passed before backfill
- ✓Roofline, siding and HVAC tied into the existing house so it does not read as an add-on
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 Chevy Chase walkthrough
A written, line-item scope for your home additions project. No design fee, no obligation.
By submitting you agree United Developers may call or text you about your request, including by autodialed/automated means and AI voice, at the number provided. Consent is not a condition of purchase. Msg/data rates may apply. Reply STOP to opt out.
Kevin R., their claims specialist, assisted me with the insurance process to replace my entire roof due to hail storm damage. Customer service was top notch.
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 home additions projects. Read all our reviews →
One contractor for the rest of the house
Our Chevy Chase crews cover Bethesda, Kensington, Somerset, Friendship Heights and every ZIP in the area — 20815.
Straight answers
Do you handle home additions in Chevy Chase, MD?
Yes. United Developers is a licensed contractor in Maryland (MHIC #111971) and works throughout Chevy Chase and Montgomery County, including 20815 and nearby Bethesda, Kensington, Somerset.
Who pulls the permit for a Chevy Chase home additions project?
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.
What should I expect in a Chevy Chase home?
The housing here is largely 1910s–1930s colonials, Tudors and Craftsman homes with plaster walls, original millwork worth protecting, and mechanical systems that have been added to rather than replaced. Kitchens and baths in these houses almost always need the electrical and plumbing rebuilt behind them, not just refinished.
What does home additions cost in Chevy Chase?
Most Chevy Chase 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.
Is the Chevy Chase 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.
How long does an addition actually take?
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.