Type your address and we'll pull the current aerial of your property. Then drag the footprint onto your actual lot, rotate it to match your house, and watch the real square footage and planning cost update as you size it.
Aerial imagery: Esri World Imagery. Geocoding: U.S. Census Bureau, with OpenStreetMap as a fallback. Imagery is the most recent available for your area and may predate recent work. Drag the footprint to move it, pull the corner to resize, use the round handle or the rotate buttons to line it up with your house. Scale is derived from the image bounds, so the dimensions shown are real feet — but this is a planning sketch, not a survey.
Size it on the aerial, then set the rest here.
A planning range for Maryland and Virginia, not a quote. Additions start with zoning — setbacks, lot coverage and height limits get reviewed before a building permit is issued — so the real number comes after a free on-site walkthrough. HVAC, electrical and plumbing are performed by licensed trade partners.
We'll bring your exact footprint to the free walkthrough and tell you what your lot actually allows.
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.
What you just drew is a footprint on real imagery at real scale. What it cannot tell you is whether your lot allows it — and that is the first thing we check, free.
How close to the property line you can build, and how much of the lot may be covered. This decides the footprint before anything is drawn.
Whether a second story is permittable at all, and how the roof must be shaped to stay under the limit.
On septic, bedroom count sizes the system — so adding a bedroom can require a capacity review before a permit is issued.
Some towns issue their own permits separately from the county. Find your town for the local detail.