ADU plans for permits, construction, and property fit

Fit a complete small home onto the property without treating it like an empty outbuilding. Coordinate living space, access, privacy, utilities, setbacks, and construction from the start.

Start your project

Complete ADU floor plans
Site placement plan
Exterior elevations

A practical approach to ADU plans

A useful drawing package brings detached and attached ADUs, backyard homes, garden suites, laneway suites, complete interiors, site placement, and permits into one coordinated view. That makes the project easier to understand, review, price, and build.

Begin with property survey or base plan, zoning limits, intended occupants, rooms, access, parking, utility connections, exterior form, and local ADU rules. HomeCat checks the property's zoning automatically and uses the applicable requirements to guide the plan. From there, the drawings can be shaped around the actual property and the decisions that matter to the project, with permit or professional-review items clearly flagged when they need attention.

How it works

01
Add your ADU project
Sign in, choose the property, and enter the size and key requirements.
02
Coordinate the plan
HomeCat checks zoning and develops the layout, site fit, and drawing package.
03
Save and export
Save the project and export measured drawings, quantities, and cost inputs.

Project measurements and costs

HomeCat keeps the project dimensions connected to material quantities and cost inputs as the plan changes.

Primary measurements: Property Fit And Access
Additional dimensions: Independent Living Layout
Units: Metric + imperial

Measured project details

Property Fit And Access
HomeCat captures the ADU footprint, setbacks, separation distances, entrance path, parking relationship, grade, and clear service access.
Independent Living Layout
HomeCat measures living, sleeping, kitchen, bathroom, storage, doors, windows, furniture clearances, and circulation as one complete dwelling.
Utilities And Building Form
HomeCat coordinates overall height, roof geometry, foundation, utility entry points, plumbing runs, mechanical zones, and electrical service locations.

Material and cost inputs

Foundation And Envelope
Measured floor, wall, roof, door, and window geometry supports takeoffs for concrete, framing, insulation, cladding, roofing, and glazing.
Kitchen Bath And Systems
Coordinated fixture groups, cabinet runs, appliances, plumbing, electrical work, ventilation, heating, and cooling define the dwelling fit-out scope.
Site Work And Connections
The site plan calculates access work, trench lengths, utility crossings, drainage features, paving, landscaping, and restoration quantities.

What homeowners usually ask

Does HomeCat check my property's zoning requirements?

Yes. HomeCat automatically checks the property's zoning requirements and uses them to guide the project. It also flags permit or professional-review items that still need attention.

What should ADU plans include?

A typical package includes Complete ADU floor plans, Site placement plan, Exterior elevations, Permit drawing package. HomeCat tailors the sheets and level of detail to the project, property, applicable permit requirements, and professional scope.

What should I gather before I start?

Prepare property survey or base plan, zoning limits, intended occupants, rooms, access, parking, utility connections, exterior form, and local ADU rules. Better source information reduces assumptions and makes review comments easier to resolve.

Can these drawings support a permit or contractor quote?

Yes. HomeCat builds one coordinated package for permit applications, contractor pricing, and construction coordination, including the project-specific documents and licensed professional input.

Can HomeCat provide stamped architectural or engineering drawings?

Yes. HomeCat provides architectural and engineering drawings with licensed professional review and stamping. The review and stamp are coordinated as part of the final drawing package.

Related plans and guides

Small House Plans

Review small house plans and keep the project information coordinated.

Site Plans

Review site plans and keep the project information coordinated.

Building Permit Plans

Review building permit plans and keep the project information coordinated.