See footprint, roof area, and boundary distances

Interactive site-plan sketcher

Draw a rectangular lot, an existing house footprint, and a proposed shed. Change dimensions with the keyboard and compare wall area with the roof projection.

The starting dimensions are a hypothetical example. This sketch is not a survey, an approved construction document, or a check of local zoning. Boundary distances are calculated from the numbers you enter; no required setback is assumed.

The tool handles rectangular footprints and a uniform shed roof overhang. It does not account for irregular lots, house eaves, easements, underground utilities, height, drainage, or structural design. Confirm the office’s drawing requirements before submitting any plan.

Your entries stay in this open page and are not sent to us or saved automatically. Reloading or leaving the page clears them. Use Download or Print to keep a copy. Names, street addresses, and account details are not needed.

1. Lot and orientation
2. Existing house wall footprint

Position is measured from the sketch’s left and top lot boundaries to the house’s left and top walls.

3. Proposed shed and roof

Enter wall dimensions. The uniform overhang is added on all four sides to calculate the horizontal roof projection, not the sloped roof surface area.

Geometry check

    Planning sketch

    The example sketch appears when JavaScript is enabled.

    Measured distances to the drawn lot boundaries

    These distances are not required setbacks or a finding that the placement is allowed. “Top” and “left” refer to the sketch; use the north arrow to orient it.

    Measurement fromLeftRightTopBottom