Preliminary ADU Plan Builder

Create your ADU concept before the deeper property homework.

Choose an ADU type, confirm the space and design choices that shape the layout, and generate a preliminary plan and homeowner one-sheet. Add the address afterward for assessor, zoning, setback, utility, and feasibility review.

Plan First
01Choose ADU Type
02Configure the Space
03Generate a First Result

Property research becomes the next step after you have a useful concept to review.

ADU Types

Start with the configuration that fits your opportunity.

Public pages describe ADU types, typical size ranges, and available features. Internal plan names and source-plan records remain private.

GC

Garage Conversion ADU

Convert an existing attached or detached garage while preserving confirmed walls, dimensions, and openings.

Typical size: 250–800 SFStudio to 2 bedrooms1 story
  • Existing-space measurement flow
  • Garage-door infill options
  • Kitchen, bath, laundry, and finish configuration
Configure Garage Conversion
J

Garage JADU

A compact junior ADU path inside an eligible garage or home area, with a smaller program and targeted utility review.

Typical size: up to 500 SFStudio or compact 1 bedroom1 story
  • Space-efficient living and sleeping
  • Compact kitchen configuration
  • Shared or independent bath review
Configure JADU
D

Detached Backyard ADU

A separate backyard structure configured by footprint, stories, bedroom count, exterior direction, and property fit.

Typical size: 400–1,200 SFStudio to 3 bedrooms1 or 2 stories
  • Width and depth configuration
  • One- or two-story options
  • Exterior, room, and material selections
Configure Detached ADU
A

Attached ADU

Add conditioned living space connected to the existing home while tracking the shared wall and required professional review.

Typical size: 350–1,000 SFStudio to 2 bedrooms1 or 2 stories
  • Shared-wall relationship
  • New exterior openings
  • Connection and fire-separation review
Configure Attached ADU
What MyADUPlan Produces First

A clear preliminary direction before site research.

The initial builder focuses on the information that changes the layout: space dimensions, ADU configuration, bedrooms, bathrooms, openings, kitchen, laundry, and materials. Construction access, assessor records, zoning, setbacks, utilities, and feasibility follow after the first plan and one-sheet.