Draw your boundary
Block out the shape of the flat by dragging rectangles onto the canvas — overlap them freely, they merge into one outline. Use Draw to add a block and Erase to cut one away; Ctrl+Z and Ctrl+Shift+Z undo and redo.
Switch to the Entry tool and click the outline where the front door goes. A width slider controls how wide the opening is.
Choose a layout network
Before you export, pick which model will generate the rooms. They trade speed for different strengths:
Graph2PlanThe default. Fast, and the network this service has always used.
WallPlanGrows walls straight from your outline and picks the rooms itself — no reference plan to choose, so it skips the next step.
Graph poolDraws dozens of possible arrangements for your outline and keeps the best against your room filters. Slower, but the strongest results. Also skips the next step.
Tree planCuts your outline into rooms with a tree of straight walls, so nothing overlaps. Slower than Graph2Plan.
DiffPlannerA diffusion model solving where the rooms go in vector form, from the same library match Graph2Plan uses.
HouseDiffusionA diffusion model that draws room corners from the room layout alone — it never sees your outline, so it needs more correcting afterwards.
FloorplanSBSDivides your outline into labelled patches. Experimental, and every wall lands on a grid line.
When you export, you are asked for the real-world length of one wall — every other measurement in the finished CAD file scales from that single number.