The decision behind the detail
If the project includes an extension, new opening or substantial exterior work, identify it as a separate scope with its own design and approval questions.
A useful checklist
- Describe the new footprint
- List exterior changes
- Separate design responsibilities
Bring it into the project brief
Keep the interior planning range in context. Additions and major structural work need a specific assessment and quote.
For the related scope, see room-by-room renovations. Keep the relevant measurements, selections and open questions together before requesting a written quote.

Illustrative reference for discussing the scope.