Start with the full playing envelope
The standard marked pickleball court is 13.41 m long by 6.10 m wide. Those white lines do not include safe run-off, circulation or the space needed to enter, leave or separate courts. Apollo's planning guide uses approximately 18.3 m by 9.1 m as a useful early overall envelope; final clearances must follow the project use and applicable guidance.
Measure the clear internal width and length, then subtract columns, walls, storage, entries, emergency paths, reception, toilets and any spectator zones. A nominal 1,000 m² building can have much less genuinely usable court space.

