Set the footprint, then add rooms
Project name
Overall footprint
The outer edge every room has to fit inside — the basement or floor you're planning. Rooms never go outside it.
Height
Planning an addition? Photograph the wall it goes on: one photo measures the wall, its doors and windows, the roof line and the electrical service.
What's already down there
Beams, posts, stairs and the furnace decide where walls can go. Mark them first, in this order: the beam (it runs the long way, down the middle, under the main floor), the posts under it, the mechanical room (an outside corner, where the furnace vents and the gas comes in), then the stairs — with 3′ of open floor at the bottom that belongs to the hallway or the rec room. Tap one to add it, then type where it really is.
Selected:
Going up toward the
Plan it for me
Say what you want down here and get three layouts that work around your beam, posts, stairs, mechanical and drain stack. Pick one; every room stays editable.
Or tap the mic on the 3D and just say it.
Bathroom
Also
Walls with windows
Add a room
An existing room fits inside the footprint you set.
Paste the scan's JSON (a Layout Library capture, a RoomEditor geometry, or just {"widthFt":..,"lengthFt":..}). Its measurements are locked: you can place and connect the room, not resize it.
Rooms in this project
Selected:
Hold and slide a room in the plan to move it. It snaps to walls within 2 inches and never overlaps another room.
Your lot — setbacks and fire separation
For additions. How far is each property line from the house's walls? A survey or the City's site plan has it; leave any you don't know blank.
Your zone's minimums
These vary by zone and subzone — look up the lot on geoOttawa. Ottawa's new Zoning By-law 2026-50 is replacing 2008-250, so check which applies.
A first look, not an approval. Fire separation follows the Ontario Building Code (9.10.15, spatial separation between houses) — the City's plans examiner confirms it for your permit.
Shared walls
Found automatically wherever two rooms touch along a wall. Nothing is invented: a wall is shared only where the rooms actually meet.
Doorways
Every room gets a door from the hallway or rec room — or the open floor — as close to the stairs as it can be. Or tap any room wall in the plan to put one there yourself.
Wall:
Furnish
Real sizes, with the room each piece needs around it. Green fits with the recommended spacing, amber is tight but legal, red is below a code or service minimum. Hold and slide a piece in the plan to move it; it turns to face out from the wall you push it against.
Add to this room
Everything else
See it for real
Uses your 3D layout as the guide, so the sizes and positions stay yours. Signed in: your free renders first, then credits.
Where the numbers come from: Ontario's code doesn't set toilet or vanity spacing for houses, so those minimums are the industry standard (IRC) and say so; comfort spacing is NKBA or designer guidance; the electrical panel's 1 m working space is the electrical code (Rule 2-308).
Layout check
Photos of the existing space
Add progress or current-condition photos so whoever reviews the idea can see the space. They add context; they don't replace a site visit. Hidden data (location) is stripped before anything is saved.
Keep this layout
Saved on this device automatically. Take it further: