35 × 12 ft across the whole back wall, from the wing to the end of the house, in place of today's deck. All outside walls in brick to match the front. Storage on the walk-out level, a bigger kitchen on the main floor, and on top a 20 ft room extension beside a 15 ft roof deck.
Drag to rotate in any direction, including over the top and underneath. Scroll or pinch to zoom, right-drag or two-finger drag to pan. Double-click to flip to the opposite side. Inside a room, the walls nearest you drop away so you can see in.
Sizes are estimates from Fairfax County map data and your photos, not a survey. Good for talking the idea through with a designer, not for building from.