Plan Chat

An 800 sq ft backyard ADU designed from one message, then grown by chat

This is a real Plan Chat session from October 2, 2026: one message produced the first dimensioned plan, then 2 changes in plain words reworked it. The plans, numbers and renders below are the AI's unretouched output; the change lists are measured by the plan engine, not written by hand.

Final plan: 2 bed · 1 bath · 1 story · 1,001 sq ft under roof.

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Version 1: the first plan from one message

YouBackyard ADU guest house, about 800 sq ft, one story: 2 bedrooms, 1 bath, open kitchen and living room, laundry closet, small covered porch at the entry.
Plan Chat, 48 seconds laterThis is a compact one-story backyard guest house of about 72 m² (roughly 780 sq ft) plus a 6 m² covered porch. You enter from the porch into an open living and kitchen area with plenty of daylight. On the east side, two bedrooms share a full bath, and a laundry closet is tucked beside the hall.
Version 1 floor plan: AI-generated dimensioned floor plan with room names, sizes and areas
Version 1, floor plan. AI-generated, unretouched output of Plan Chat. Every version also comes as PDF, DXF, IFC and a 3D model.
Bedrooms
2
Bathrooms
1
Stories
1
Under roof
797 sq ft (74 m²)
Footprint
35'-5" × 24'-3"
Style
modern cottage

Version 2: a change asked for in plain words

YouAdd a home office next to the living room
Plan Chat, 23 seconds laterAdded a home office with its own door off the living room. The house grows outward to fit it, and all other rooms keep their sizes. The footprint grows from 35'-5" × 24'-3" to 45'-7" × 24'-3" (+143 sq ft). Result: new Home Office 109 sq ft.

What changed (measured on the new plan)

  • Added Home Office
  • Covered Porch: 63 → 67 sq ft (+4)
  • Whole house: 797 → 940 sq ft

7 other rooms kept their size and place.

Version 2 floor plan: AI-generated dimensioned floor plan with room names, sizes and areas
Version 2, floor plan. AI-generated, unretouched output of Plan Chat. Every version also comes as PDF, DXF, IFC and a 3D model.
Bedrooms
2
Bathrooms
1
Stories
1
Under roof
940 sq ft (87.4 m²)
Footprint
45'-7" × 24'-3"
Style
modern cottage

Version 3: a change asked for in plain words

YouMake the living room bigger and add a covered back patio
Plan Chat, 23 seconds laterI made the living room larger and added a covered patio at the back of the house, reached by a door from the living room. All other rooms stay as they were. The footprint grows from 45'-7" × 24'-3" to 49'-10" × 24'-3" (+60 sq ft). Result: new Covered Back Patio 143 sq ft; Living Room 222 sq ft → 274 sq ft.

What changed (measured on the new plan)

  • Added Covered Back Patio
  • Living Room: 222 → 274 sq ft (+52)
  • Whole house: 940 → 1,001 sq ft

7 other rooms kept their size and place.

Version 3 floor plan: AI-generated dimensioned floor plan with room names, sizes and areas
Version 3, floor plan. AI-generated, unretouched output of Plan Chat. Every version also comes as PDF, DXF, IFC and a 3D model.
Bedrooms
2
Bathrooms
1
Stories
1
Under roof
1,001 sq ft (93 m²)
Footprint
49'-10" × 24'-3"
Style
modern cottage
Room schedule of version 3 (10 spaces)
RoomSizeArea
Covered Porch6'-7" × 10'-2"67 sq ft
Living Room22'-7" × 12'-2"274 sq ft
Kitchen11'-3" × 9'-0"101 sq ft
Hall5'-6" × 9'-9"54 sq ft
Bedroom 19'-8" × 11'-7"112 sq ft
Bedroom 29'-8" × 10'-4"99 sq ft
Bathroom5'-6" × 7'-4"41 sq ft
Laundry Closet5'-6" × 4'-5"24 sq ft
Home Office9'-0" × 12'-2"109 sq ft
Covered Back Patio14'-1" × 10'-2"143 sq ft

Photoreal renders of the final plan

Rendered from the 3D model of version 3 with one click. AI-generated images; materials and landscaping are suggestions.

Exterior render of the backyard adu guest house, designed by chat (AI-generated)
Exterior view, AI-generated.

What you get from a session like this

  • A dimensioned floor plan for every version, in feet-inches or metres, with room names and areas.
  • Files for each version: PDF plan set, DXF for AutoCAD and other CAD tools, IFC for Revit and Archicad, GLB 3D model, CSV area schedule.
  • Every change as its own version with a link. Undo or restore any version for free.
  • Optional photoreal renders (exterior, aerial, interior) of the current version.

This whole session used 620 credits; the Starter plan includes 5,000 credits a month. See pricing. AI concept designs, not construction documents: have a licensed professional check any plan before you build or apply for a permit.

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