FloorGen
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For architects and drafters

Floor plan software for architects

A quick, free place for concept plans, client options and small residential drawing sets: scaled sheets up to ARCH D, elevations, sections, code checks and a DXF to carry on in your CAD. It is not BIM and does not try to be.

Open a 4-bed two-storyBlueprint-style plans
First floor plan of a four-bedroom two-story house with living room, foyer, staircase, den, dining room, kitchen, powder room, pantry and laundry, dimensioned in feet and inches.
Sheets
Letter to ARCH D / A1
CAD out
DXF (R12)
Code profiles
IRC, NBC, OBC, UK, DIN, CDMX
Price
Free

Most architects already own a CAD or BIM package and are not looking to replace it. Where a light browser tool earns its place is earlier and smaller: the feasibility sketch before a fee is agreed, the three options for a first client meeting, the existing-conditions plan of a small house, or a garden suite that does not justify a full model.

Where it fits in the week

Architectural tasks FloorGen covers, and how
TaskIn FloorGen
Feasibility and first optionsStart from a template or a blank sheet, set a plot size, and read plot coverage and FAR as you draw. Version history keeps option A while you draw B.
Existing conditionsTrace a survey PDF or a scan: set the scale from one dimension, straighten a crooked scan, and let Detect walls propose walls from the thick dark lines for you to accept.
A code sanity checkRooms, stairs and escape windows are checked against IRC (US), NBC (Canada), OBC (Ontario), UK Approved Documents, DIN (Germany) or CDMX (Mexico City). A basement escape window can get a window well added outside, sized to IRC R310. A design aid, not a plan review.
DrawingsPlans with dimension strings to centreline, inside or outside faces; elevations and sections generated from the model; door and window schedules with D1 and W1 tags.
SheetsA print set PDF with a sheet per floor at a real scale and a title block, on Letter, Tabloid, A4 to A1 or ARCH C and D, with a blueprint style if you want one.
Into CADDXF (AutoCAD R12) on eight layers: walls, rooms, doors, windows, furniture, stairs, dimensions and notes, at full size in centimetres. SVG for illustration work, glTF for a 3D viewer or Blender.
Client presentations3D orbit, dollhouse and walk modes, and an MP4 walkthrough video up to 1440p.

Concept to CAD in an afternoon

  1. Set the site. Add the plot size and the code profile for the jurisdiction.
  2. Block out the plan from the closest template, typing wall lengths and thicknesses. The four-bed two-story has about 1,030 ft² of rooms per floor to start from.
  3. Save a version for each option and name it. Restore any one to keep developing it.
  4. Run the checks and read the area table: net, gross, above and below grade, coverage and FAR.
  5. Generate elevations and a section for the client meeting, and a walkthrough video to send afterwards.
  6. Export the DXF of the chosen option and carry on in your own CAD with your standards, blocks and dimension styles.

What FloorGen doesn't do

  • No DWG, IFC or BIM. Export is DXF R12, SVG, PDF and glTF. There is no DWG import, but a DXF imports as editable walls, doors and windows, with you choosing what each layer becomes; a drawing you only have as a PDF, you trace.
  • No stamped or construction drawings. Nothing it produces is a construction document, and there is no structural, MEP or energy analysis.
  • No photoreal rendering. The 3D view is a working view, not a visualisation package.
  • No real-time multi-user editing. One person edits a project at a time; there are no shared team libraries or markups.
  • Code checks are partial. They cover room sizes, stairs and escape windows, not the whole code, and they are not a plan review.

Questions

Which CAD programs open the DXF?

Any that read AutoCAD R12 DXF, which is nearly all of them. Geometry is in centimetres at full size; floor plan to DXF shows how to bring it in to scale in AutoCAD, LibreCAD and QCAD.

Can I draw in metric?

Yes. Each project is metric or feet and inches, to 1 mm or 1/16 in. The UK, German and Mexican templates start in metric.

What goes in the title block?

The project name, client, address and revision, with the scale and a north arrow that follows the project's north angle. The print set can add a building summary with areas per floor, the schedules and a 3D view.

Can an AI agent draw the options?

Yes. FloorGen's MCP server lets Claude, ChatGPT or Cursor create and edit plans, run the checks and read the area schedule; you review the result in the studio. See FloorGen for AI agents.