Interior walls, partitions, and multi-room plans

Interior walls divide an existing outer room without redrawing its perimeter. They are centred on their plan line and are normally 10 cm thick, while the exterior wall envelope is normally 15 cm thick.

Draw an interior wall#

1. Enter Build and switch to Plan.
2. Choose Draw interior wall from the wall tools or command search.
3. Start on an exterior wall, another partition, or a valid point inside the room.
4. End on another valid host so the line creates a usable division.
5. Confirm the on-canvas length, then select Done.

An interior wall must be at least 60 cm long. A candidate is rejected when it crosses an unsupported segment, leaves a broken junction, sits outside the room, or creates invalid room geometry.

Edit the wall graph#

Select a partition segment to expose its length and delete controls. Drag a segment to move it while keeping compatible connections attached. Select a junction to move the meeting point of several segments. Dimension labels can accept an exact length, and snapping helps endpoints meet existing walls cleanly.

Use Erase interior wall when you want to remove segments by tapping them. A door or window attached to a deleted segment must also be removed or re-hosted by the valid edit; Room Planner will not draw it on an unrelated exterior wall.

Put openings on partitions#

The normal Door and Window tools can target an interior wall. Select the opening later to edit it, or use Edit host interior wall from the opening inspector to jump to the segment that owns it. Moving the partition carries the hosted opening when the new span still fits.

Understand room areas and shared walls#

A partition network can divide the plan into named areas. Structure and finish controls use those areas to target the correct floor, wall, lights, and contents. Very small slivers are not treated as usable rooms; close gaps and remove duplicate near-parallel walls instead of relying on a tiny cell.

A Room Vision whole-home result can contain several globally aligned room roots. Their party walls are shared rather than doubled. A shared wall may be visually owned by the adjacent room, so its finish control can direct you to that room. Do not redraw a second wall over it.

Safe topology changes#

Wall edits can affect doors, windows, wall-mounted furniture, light ownership, finish zones, and room names. Save before restructuring a furnished plan. If an edit is disabled, use the message in the selected wall or opening control; it may be protecting a connected wall graph rather than indicating a browser problem.

For opening types and fit rules, read Doors, windows, and openings. For AI-created multi-room input, read Create a room with Room Vision.