List the rooms and work
Write down each room and the changes you want. Identify what stays, what is removed and which finishes will be replaced.
Record the essentials
Note layout changes, storage requirements, appliance dimensions and existing features you want to protect.
Separate decisions from ideas
Make it clear which choices are final and which need advice. Save a small set of reference images with notes about what you like.
Plan for living around the work
Consider access, dust, noise and the availability of essential rooms. Discuss these needs with your builder when the work is scoped.
Keep one current brief
Keep the latest agreed scope together with selections and documented changes. A shared reference reduces confusion.