Building a multi-story floor plan
Real homes have more than one floor. Add storeys (and basements) that stack automatically, connect them with stairs, and walk between them in 3D.
Most homes aren't a single floor. Room Sketch 3D lets you stack multiple storeys — a second floor, a loft, a basement — that line up automatically and connect with stairs you can walk up in 3D.
The workflow is simple: build the ground floor, drop in the stairs, add the next floor, and trace it over the one below.
Step by step
- 1
Build the ground floor and add stairs
Draw your ground floor as usual, then place a staircase (Build Panel → Stairs). Stairs are what link one floor to the next, so add them before the upper floor — they auto-link to the floor above.
- 2
Add a floor
Open the Floors panel (top-left) and Add Floor. New storeys stack on top of the ground floor automatically; you can also add a basement below.
- 3
Trace over the guide underlay
The new floor opens with a faint guide underlay showing the floor below, so you can line up exterior walls and stair openings. Draw the upper floor's walls and rooms over it.
- 4
Build out the upper floor
Add the upper floor's interior walls, doors, windows, and fixtures — everything works exactly as it does on the ground floor.
- 5
Walk between floors in 3D
Switch to 3D View. The floors render stacked, the stairs connect them, and in walk mode you can climb between floors.
- 6
Export per floor or the whole house
Export a per-floor PNG for each level, or the whole house as a 3D model (GLB).
Tips
Stairs first, then the floor above
Place the staircase on the lower floor before adding the floor above — the stairs auto-link and leave the right opening in the upper floor.
Use the underlay to align walls
Trace the upper floor's exterior walls directly over the guide underlay so the storeys stack cleanly and the roofline looks right in 3D.
Frequently asked questions
Can I design a two-story house?
Yes. Add a second floor from the Floors panel; it stacks on top of the ground floor automatically. You can add more storeys and a basement too.
How do floors connect?
With stairs. Place a staircase on the lower floor and it auto-links to the floor above, leaving the opening. In 3D walk mode you can climb between floors.
Can I see the floor below while drawing the next one?
Yes — a 2D guide underlay shows the floor below so you can align exterior walls and stair openings as you draw.
Can I export each floor separately?
Yes — export a per-floor PNG for each level, or the whole house as a 3D GLB model.
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