Attached ADU planning

Attached ADU Models & Layout Planning

Attached ADUs depend heavily on the existing home: wall locations, foundation, roof, utilities, windows, structure, circulation, and fire/life-safety conditions. ADU.zone therefore treats attached layouts as property-specific design work instead of publishing a misleading fixed-plan catalog.

Check my propertyAttached ADU service

Why the property comes first

A catalog can help compare space and style, but it cannot verify setbacks, easements, existing construction, utilities, access, hazards, or agency requirements for a specific address.

Property-specific layout

Do not force a generic floor plan onto an existing building.

Existing geometry

Measure the real building, openings, circulation, ceiling heights, and structural conditions.

Utilities

Confirm electrical, sewer, water, HVAC, and service-upgrade implications before design is locked.

Code constraints

Review fire separation, egress, energy, structural, parking, and jurisdiction-specific requirements.

Owner priorities

Bedrooms, baths, storage, accessibility, privacy, and rental goals shape the final layout.

Planning sequence

From address to buildable scope.

  1. 01

    Check the property

    Start with parcel context, existing improvements, and the information that can be verified online.

  2. 02

    Investigate the unknowns

    Survey, utilities, structure, access, hazards, and local requirements are resolved before the scope is treated as final.

  3. 03

    Design and permit

    Develop architecture and engineering around the verified site, then submit through the applicable agency process.

Next step

Put the actual property at the center of the decision.

Check my property