Rear-yard questions
The door you walk out of, what the yard is for, and the fall of the ground.
Which door counts as the back door?+
The one you use to reach the rear yard, often the kitchen. The yard is tied to that door. A side gate is not a substitute hinge.
Can I flatten the slope for a bigger lawn?+
No. Slope stays. Steps and uses follow the fall. A flat pad that contradicts the photo is not a backyard result.
What if the rear yard has two doors?+
Pick the door people actually use, and tie the plan to it. The other door still needs a path, not a new center of gravity.
Is a play area allowed to cover the whole rear?+
Yes, if that is the use you named, and if the slope stays readable under it. Play does not cancel the fall of the ground.
Does this page redesign the rear fence?+
It can show a fence as the far edge. A new fence design, with gate and privacy, belongs on the fence page.
When should I leave for the patio page?+
When the question is paving, furniture, and shade, and the precise door threshold and level change. The backyard page is the whole rear yard tied to the back door.
Can the slope be read from this photo?+
Yes. The photograph supplies the back door, the fall of the ground, and the rear wall. The plan does not flatten the hill.