Granny flat design for Perth backyards
Ancillary dwellings · Perth WA

Granny flat design for Perth backyards

Extra living space, rental income or room for family, designed to what your block actually allows.

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Ancillary dwelling design, done properly

A granny flat is the cheapest square metre you will ever add to your property, if it is designed around the rules before a single line is drawn. We handle the R-Codes setback and open space calculations, the ancillary dwelling floor area limits, and the council submission, so the design you approve is the design that gets built.

Feasibility first

Before design starts we check your lot size, zoning and setbacks against the R-Codes so you know what is actually permitted on your block.

Designed to the limit

Ancillary dwellings have a maximum floor area. We plan the layout to use every allowable metre rather than leaving space on the table.

Council-ready drawings

Site plan, floor plans, elevations and the supporting documents your local council requires for a Development Application.

Built for a builder

Documentation a builder can quote from accurately, which means fewer variations and fewer surprises once construction begins.

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Questions

Common questions

How big can a granny flat be in Perth?

Ancillary dwellings in Western Australia are subject to a maximum floor area under the R-Codes, and the lot must meet a minimum size. The exact figures and any local variations depend on your zoning and your council, which is why we run a feasibility check before design begins.

Do I need council approval for a granny flat?

In most cases yes: a Development Application to your local council, followed by a Building Permit. Some proposals that comply fully with the deemed-to-comply provisions can follow a simpler path. We assess which applies to your property.

How long does the design and approval take?

Concept design typically takes days rather than weeks. Council assessment timeframes vary by local government and by how complete the submission is. A well-prepared application avoids the requests for further information that cause most delays.

Can you work with my builder?

Yes. Much of our work is producing documentation for builders. If you already have a builder we can coordinate directly with them so the drawings suit how they price and construct.

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Find out what fits on your block

Send us your address and a rough idea of what you want. We will come back within 24 hours with what is achievable under the R-Codes.

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We reply within 24 hours with a clear next step, not a brochure.