Guide
7 common floor plan mistakes.
The most common floor plan mistakes are doors that hit furniture, walkways under 900 mm, rooms you reach only through another room, rooms without a window, too much corridor, no storage, and furniture drawn smaller than it is. All seven show up on a measured draft.
Try it freeThe seven
Check your plan against this list.
- Door swings that hit a bed, a wardrobe or another door.
- Walkways narrower than 900 mm.
- A bedroom you can only reach through another bedroom.
- A living room, bedroom or kitchen with no window.
- Long corridors that eat floor area.
- No place for coats, a vacuum cleaner or suitcases.
- Furniture drawn smaller than real life.
Why they slip through
On a sketch everything fits. Problems appear only when walls, doors and furniture are drawn to scale together.
How to catch them
Draw to scale and walk the plan room by room. Roommie's validator checks several of these for you: overlaps, door placement, reachability and walkway clearance.
Questions
How much corridor is too much?
As a rough guide, try to keep corridors under about 10% of the floor area.
Does every room need a window?
Rooms people live in normally do, and many building rules require it. Bathrooms and storage can go without.
Updated 5 October 2026. Outputs are schematic-design drafts, not construction documents.