Take a photo of the whole wall, straight on, from the yard
1 · One photo of the wall
Stand back so the whole wall is in the frame, from the ground to the roof. Straight on is best; an angle is fine — you'll tap the corners next. Location data is removed from the photo before anything is saved.
Which side of the house is this?
2 · Tap the four corners of the wall
In this order: bottom-left at the ground, bottom-right at the ground, top-right where the wall meets the roof (the eave), top-left at the eave. Zoom with two fingers if you need to.
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3 · Tap a door you know the size of
Tap the top-left and bottom-right corners of the door panel itself — the part that swings or slides, not the frame around it. Door height is almost always 80″; the width is what varies, so pick the right one or measure it once with a tape (ten seconds, and the whole wall scales off it).
For a slider, tap the outside edges of the glass unit and choose its nominal width.
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4 · Mark what's on the wall
Pick a type, then tap the top-left and bottom-right of each item. Mark the electrical meter or service mast with one tap, and the roof peak with one tap if the roof comes to a point on this wall. If there's a second-storey window or a dormer above the eave, mark it too — it tells the plan this wall already carries an upper floor.
5 · The wall, measured from your photo
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Measured from the photo after flattening it; accuracy depends on how carefully the corners were tapped — usually within a few inches. A designer confirms on site.