SitePlanWorks

Additions

An addition is measured against the same setbacks as the house it grows out of, and it is the fastest way to run out of coverage.

9 styles on the same addition demo lot · lightest is Bump-out at +1.1%

What sends these back: coverage arithmetic that stops at the addition.

Put one of these on your lot

free · no sign-up · seconds

ADDITION 01Rear addition+3.1%Out the back. The most common direction, and the rear setback decides it.ADDITION 02Side addition+3.7%Out the side, when the side yard has room to give.ADDITION 03Bump-out+1.1%Just enough for a dining nook or a bay. Small, but still a permit.ADDITION 04Second-storey addition+6.7%Up instead of out, so the lot coverage never moves.ADDITION 05Primary suite addition+4.0%A bedroom with its own bath attached to the house.ADDITION 06Sunroom+2.3%Mostly glazing, and classified differently from a conditioned room.ADDITION 07Screened porch+2.7%Roofed and screened but not conditioned, which is its own class in most codes.ADDITION 08Three-season room+2.7%Glazed enough to use in spring and autumn, not heated for winter.ADDITION 09Front porch+2.2%Out the front, where the setback is deepest and least forgiving.