Drafted raised US7.5m to turn a sketched floor plan into a buildable home design

Drafted, a Y Combinator startup building generative models for residential architecture, has raised US$17.5m in seed funding led by Buckley Ventures.

The number that earned the round is the traction before it: 120,000 users generated more than 325,000 floor plans in a single month, on word of mouth alone, with no marketing budget. Drafted's models take a footprint, lot boundary, room program and square-footage constraints, hold them consistent across iterations, then export CAD and PDF files into the rest of the build process. The wedge is cost. A custom residential design typically runs US$10,000 to US$50,000 and takes months; Drafted compresses the first draft to minutes.

The cap table is unusually deep for a seed, with Patrick Collison, Pinterest's Ben Silbermann, Jack Altman and Samsung among the backers. The open question is whether a generated plan survives contact with permitting, engineering and a builder, or whether it just front-loads work that gets redone downstream.