Addition questions
A new volume, the face it joins, and the rest of the house left alone.
Does the whole house get redesigned?+
No. The original house stays, except the face the addition joins. That face may open into the new volume.
Can I add a second story over part of the house?+
Say so, and name the footprint it sits on. A second story is still an addition with a joint. It does not restyle the rooms underneath unless they are on that joint.
What should I write about the roof?+
Whether the new roof tucks under the existing eave, continues the slope, or turns at the joint. Story count belongs in the same note.
Will windows on the far side move?+
No. Windows away from the joined face stay. Only the shared face is allowed to change.
How exact does the size need to be?+
A side and a rough projection are enough to start: “twelve feet off the rear wall,” for example. A plan page is the place for room-by-room sizes.
Can the addition match the old cladding?+
Yes. Ask for the same skin, or name a different one. Matching is a choice about the new volume, not a license to repaint the whole house.
Can the joined face and the existing roof be read from this photo?+
Only if the frame includes the wall the addition touches and enough of the existing roof to judge height. A crop of one corner will invent the joint.