Home Additions in Upper Marlboro
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 Prince George's County Department of Permitting, Inspections and Enforcement, coordinate the licensed trades, and hand you a written line-item scope before demolition starts.
Start your Upper Marlboro 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 Bowie, Mitchellville, Largo and every Upper Marlboro ZIP: 20772, 20774.
- A written, line-item scope for your Upper Marlboro project before anyone swings a hammer
- Permits pulled through the Prince George's County Department of Permitting, Inspections and Enforcement 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 Upper Marlboro permit goes through the Prince George's County Department of Permitting, Inspections and Enforcement. We pull it under our license and we hold the inspection schedule — you do not chase inspectors and you do not sign the application.
Upper Marlboro is the county seat of Prince George's County, and most homes with an Upper Marlboro address sit in unincorporated county, so the building, plumbing and electrical permits all come from DPIE. Inside the small incorporated town, the Upper Marlboro Residential Historic District, listed on the National Register in 2012, has houses back to the 1700s; on an older house there, check whether it is a designated county historic site before planning exterior changes.
The house decides half the scope.
Beyond the old town, the Upper Marlboro ZIP codes are mostly subdivisions from the 1970s onward, around Marlton, Kettering and Largo: colonials, split-levels and townhouses where the original builder-grade kitchen and bathrooms are usually the starting point.
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 Upper Marlboro 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 Upper Marlboro crews cover Bowie, Mitchellville, Largo, Kettering and every ZIP in the area — 20772, 20774.
Straight answers
Do you handle home additions in Upper Marlboro, MD?
Yes. United Developers is a licensed contractor in Maryland (MHIC #111971) and works throughout Upper Marlboro and Prince George's County, including 20772, 20774 and nearby Bowie, Mitchellville, Largo.
Who pulls the permit for a Upper Marlboro home additions project?
We do, under our license, through the Prince George's County Department of Permitting, Inspections and Enforcement. 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 Upper Marlboro home?
Beyond the old town, the Upper Marlboro ZIP codes are mostly subdivisions from the 1970s onward, around Marlton, Kettering and Largo: colonials, split-levels and townhouses where the original builder-grade kitchen and bathrooms are usually the starting point.
What does home additions cost in Upper Marlboro?
Most Upper Marlboro projects land in the $180 – $340 / sq ft range. That is a planning range for Prince George's County, not a quote — your written price comes after a free on-site walkthrough.
Is the Upper Marlboro 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.