AI Duplex Floor Plan Generator for Two-Unit Layouts

Plan two separate homes within one building.

Enter building area, lot conditions, unit arrangement, rooms for Unit A and Unit B, stories, entrances, stairs, and garage needs. Generate a top-down duplex concept to compare and continue in the connected editor.

  • • Explore side-by-side, stacked, mirrored, and different unit arrangements
  • • Set bedrooms and bathrooms for each unit
  • • Review entrances, privacy, stairs, garages, and shared walls
  • • Continue in an editable 2D and 3D project
  • • Export supported formats for compatible workflows
Generate a Duplex Floor Plan → Explore Duplex Layouts

The supplied case plans are illustrative prototypes, not verified outputs of the current generator.

Illustrative top-down side-by-side duplex plan with two separate units and garages
Illustrative duplex layout and workspace controls.

Explore Common Duplex Layout Types

A duplex is a two-unit residential building. Compare the main arrangements before choosing a direction.

Side-by-Side Duplex

  • • Two homes share a central wall
  • • Separate ground-floor entrances
  • • Can suit a wider lot

Both units have direct entry and can have separate outdoor areas.

The four diagrams explain unit arrangements; actual lot, utility, fire, and access rules require professional review.

See What Your Duplex Requirements Can Produce

Compare four building briefs with illustrative top-down duplex plans. Use a brief to prefill Unit A, Unit B, and building priorities.

One-Story Side-by-Side Duplex

  • • 220 sqm total · 1 story · mirrored units
  • • Each unit: 2 bedrooms, 2 bathrooms
  • • Private entrances · separate kitchens and laundry
  • • Shared central wall · backyard access

A balanced one-level direction with equal unit areas and clear separation.

Supplied plans are visual prototypes, not verified live generator outputs. Check each unit, floor, entrance, garage, and dimension before generating.

Start with the Details That Shape Your Duplex Plan

Describe the building and the two homes separately so the concept reflects their different needs.

Building size and lot

Add approximate width, depth, total area, setbacks, and slope.

Unit arrangement

Choose side-by-side or stacked and mirrored or different units.

Rooms in each unit

Set bedrooms and bathrooms for Unit A and Unit B; describe kitchens, laundry, and storage.

Entrances and stairs

Specify private entries, stairs, and accessibility priorities.

Garages and outdoor access

Include parking, patios, balconies, or backyard paths.

Privacy and shared services

Describe shared walls, utility zones, and separation needs.

Illustrative duplex input panel with separate Unit A and Unit B controls
Use the workspace above for actual unit counts and layout priorities.

How AI Duplex Floor Plan Generation Works

Develop a two-home planning brief into a concept for further review.

1. Enter building and unit requirements

Add area, arrangement, each unit’s rooms, entrances, garages, and priorities.

2. Generate a layout direction

Review two labeled homes, boundaries, circulation, and access points.

3. Edit and compare

Continue in the editor and explore alternative proportions or arrangements.

4. Review and export

Inspect supported views and choose a compatible format.

Illustrative duplex requirements and layout preview

Edit, Compare, and Export Your Duplex Plan

Use the connected workspace to investigate separate unit needs and the next project format.

Refine Unit A and Unit B

Adjust supported rooms, openings, stairs, and garages for each household.

These images illustrate possible editing and review states; they are not verified outputs of the live generator.

Open the Duplex Plan Editor →

Duplex Floor Plan Planning Considerations

A two-unit concept must work for each household and for the building as a whole.

Unit privacy

Compare entrances, bedrooms, windows, and outdoor access.

Shared walls and floors

Review rooms that meet across a wall or between stacked units.

Stairs and circulation

Keep routes clear without crossing the other household’s entrance.

Garages and parking

Consider pedestrian paths, driveways, and separate or shared parking.

Kitchens and utilities

Service areas may align, but systems need professional design.

Daylight and outdoor space

Give both homes access to light and outdoor areas.

Before construction, qualified professionals must verify setbacks, zoning, fire and acoustic separation, structure, utilities, accessibility, codes, and permits.

Illustrative duplex plan highlighting unit privacy, entries, shared wall, and circulation

How People Use Their Duplex Floor Plans

Use early concepts to compare common two-household decisions.

Owner and rental

Compare separate entrances, unit sizes, and privacy.

Multigenerational living

Plan different bedroom mixes with independent daily use.

Narrow lot

Explore stacked arrangements and stair access.

Garage-supported duplex

Compare parking and pedestrian routes for both homes.

Common Questions About Duplex Floor Plans

What is a duplex floor plan?

It organizes two separate homes in one building, either side by side or stacked.

What is the difference between side-by-side and stacked?

Side-by-side units sit next to each other; stacked units sit one above the other and need separate stair, entry, and floor-separation planning.

Can both units have different layouts?

Yes. Enter different bedroom and bathroom counts for Unit A and Unit B and describe the other differences in layout priorities.

Can I create a one-story duplex?

Yes. Set one story, unit room counts, entrances, and the lot conditions in the brief.

Can I plan a two-story duplex with garages?

Yes. Include two stories, separate stairs and garages, rooms for each unit, and entry needs.

Can I edit Unit A and Unit B separately?

The connected editor lets you refine supported room, opening, stair, and garage elements. A generated concept image is not automatically an editable architectural model.

Which file formats can I export?

Depending on the project, supported formats include DXF, PDF, PNG, GLB, STL, and OBJ.

Does the tool check zoning or building codes?

No. It does not validate setbacks, fire or acoustic separation, structure, accessibility, utilities, or local codes.

Can I use the result directly for construction?

No. It is an early planning concept. Qualified professionals must verify it and prepare permit or construction documents.

Ready to Plan Your Two-Unit Layout?

Enter building conditions and requirements for Unit A and Unit B, then compare an early duplex concept.

Generate My Duplex Plan →Explore Example Layouts