Home Additions in Silver Spring
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 Silver Spring 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 Wheaton, Takoma Park, Kensington and every Silver Spring ZIP: 20901, 20902, 20903, 20904, 20905, 20906, 20910.
- A written, line-item scope for your Silver Spring 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 Silver Spring 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.
Silver Spring is unincorporated Montgomery County — despite how it is talked about, there is no city government issuing permits. Everything goes through Montgomery County Department of Permitting Services, including the separate electrical permit the county requires for any circuit work. The one local wrinkle worth knowing: the neighbouring towns of Takoma Park and Kensington DO run their own review, so if your address straddles that line the answer to “who permits this” changes with the street.
The house decides half the scope.
Silver Spring is one of the older housing stocks in the county — large numbers of 1920s–1950s bungalows, capes and brick colonials, plus mid-century ramblers further out. Knob-and-tube remnants and 60–100 amp panels are common in the pre-war houses, which is why a basement finish here so often starts with a panel upgrade. Many basements are also below the water table with no perimeter drainage, so waterproofing has to be settled before framing, not after.
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 Silver Spring walkthrough
A written, line-item scope for your home additions project. No design fee, no obligation.
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One contractor for the rest of the house
Our Silver Spring crews cover Wheaton, Takoma Park, Kensington, Colesville and every ZIP in the area — 20901, 20902, 20903, 20904, 20905, 20906, 20910.
Straight answers
Do you handle home additions in Silver Spring, MD?
Yes. United Developers is a licensed contractor in Maryland (MHIC #111971) and works throughout Silver Spring and Montgomery County, including 20901, 20902, 20903, 20904 and nearby Wheaton, Takoma Park, Kensington.
Who pulls the permit for a Silver Spring 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 Silver Spring home?
Silver Spring is one of the older housing stocks in the county — large numbers of 1920s–1950s bungalows, capes and brick colonials, plus mid-century ramblers further out. Knob-and-tube remnants and 60–100 amp panels are common in the pre-war houses, which is why a basement finish here so often starts with a panel upgrade. Many basements are also below the water table with no perimeter drainage, so waterproofing has to be settled before framing, not after.
What does home additions cost in Silver Spring?
Most Silver Spring 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 Silver Spring 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.