Our services
Home Additions & Sunrooms in Loudoun County
Adding real, conditioned square footage — sunrooms, family room bump-outs, primary suites and second-story work.
An addition is the most involved thing we do. It touches the foundation, the roof, the envelope and the mechanical systems all at once, and it is the project where planning and coordination matter far more than any single trade.
From drawings to a closed permit
Additions need stamped drawings, a zoning review against your lot setbacks and — in most Loudoun County neighborhoods — HOA architectural approval before the county will issue anything. We work through those in the right order so you are not waiting on an approval you could have started three weeks earlier.
From there it is footings and foundation, framing, roof tie-in, windows and doors, and then the envelope: flashing, house wrap, insulation and air sealing. Tying new roof and wall planes into an existing house without creating a leak is careful, unglamorous work, and it is where an addition either lasts or does not.
Making it feel original to the house
The tell of a poorly built addition is always the same: the trim profiles do not match, the floor steps down half an inch at the threshold, the siding courses do not line up and the new windows sit at a different height. We measure the existing details and reproduce them, and we plan the floor system so the finished floors meet level.
We also handle the systems side — extending HVAC properly rather than bleeding an already-marginal system into a new room, running new circuits from the panel, and confirming the panel can carry them.
What is included
Every project is scoped individually, but on a typical home additions job we handle:
- Coordination of stamped drawings, zoning review and HOA approval
- Footings, foundation or crawlspace and structural framing
- Roof tie-in, flashing and weatherproofing
- Windows, doors, siding and trim matched to the existing house
- HVAC extension, electrical panel work and plumbing
- Insulation, air sealing and drywall
- Interior finish, flooring and trim carpentry
- All permits, inspections and final Residential Use Permit
Want a price for your project?
No online calculator — send us the details and we will look at it properly.
Where we do this work
We are based in Ashburn and take home additions projects across Loudoun County and nearby Fairfax County:
Our work
Home Additions projects we have completed
Good to know
Home Additions — common questions
How long does an addition take?
Plan on four to eight months from first drawings to final inspection. Roughly a third of that is permitting and approvals before anyone breaks ground — which is the part homeowners most often underestimate.
Will my HOA need to approve it?
In most Ashburn, Brambleton, Broadlands and Lansdowne neighborhoods, yes — and the architectural review usually needs to be in hand before the county will issue a permit. We will tell you what your association typically asks for and help assemble the submission.
Can you build a second story over an existing room?
Sometimes. It depends entirely on whether the existing foundation and walls can carry the load, which a structural engineer has to determine. We bring one in early rather than after you have grown attached to the idea.
Can we live in the house during construction?
Usually yes. We keep the addition sealed off from the existing house for as long as possible and only open the connecting wall when the new structure is dried in.
Often built together
Related services
Let’s talk about your home additions project.
Tell us what you have in mind — rough details are fine. We will come out, look at the space and put together a real estimate.