How to Add Interior Walls and Lay Out an Apartment Floor Plan | Room Sketch 3D
Lay out a real 1-bedroom, 1-bathroom apartment (with an open kitchen, dining, and living) from a single outer rectangle, using only interior walls. Every technique you need: perpendicular drawing with 90° snap, free-angle when you don't want right angles, editing a wall's length by typing or by dragging a corner, and moving a whole wall to reposition it. Then add doors, watch rooms auto-detect with their names, and walk through the finished apartment in 3D.
5 minUpdated 2026-05-18
Read the full step-by-step guideWhat this video covers
- 1Start with the outer shape
- 2Pick the Interior Wall tile
- 3Draw perpendicular walls (90° snap — the default)
- 4Draw free-angle walls when you need a diagonal
- 5Edit a wall — by length, by drag, or by moving the whole thing
- 6Add doors so the rooms connect
- 7Watch the rooms appear — auto room detection
- 8Walk it in 3D
Prefer to read along? See the full written walkthrough with screenshots.
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