Granny flat rules
in Western Australia.
In WA a granny flat is called an ancillary dwelling. The rules depend on your council and your block, so we help you check them before you order.
Granny flat models
Expanda
Our most popular range, folds out to full width
20FT, 30FT, 40FT · 1 to 4 bedroomsView the Expanda
Single Side Expandable
Ships 2.08 m wide, expands to 4.34 m
20FT, 30FT, 40FT · opens to 4.34 m wideView the Single Side Expandable
Slide-out Studio
Compact to transport, opens to 4 m wide on site
20FT, 30FT · 22 to 35 m²View the Slide-out Studio
Studio Portable Dwelling
Self-contained studio, fitted out your way
20FT, 30FT, 40FT · 12 to 23 m²View the Studio Portable DwellingWhat to check before you order.
Every block is different. These are the questions your council will ask, and the ones we help you answer.
- Which approvals apply
Planning approval, building approval or both, depending on your council and design.
- Size and siting
Councils set limits on floor area, setbacks and how much of the block can be built on.
- Your block
Zoning, lot size, easements and existing buildings all affect what fits.
- Services
Water, waste and power connect at labelled points. Your trades connect them.
- Access
Trucks need about 3 m wide and 4.5 m high. If not, a crane lifts it in.
- Certified fittings
SAA-certified electrical and WaterMark-certified plumbing fixtures, fitted in our factory.
Talk it through in Perth
Perth display centre
15 Oxleigh Dr, Malaga WA 6090
- Tue to Fri9 am to 5 pm
- Saturday8 am to 12 pm
Questions people ask
What is an ancillary dwelling?
It is the term WA planning rules use for a granny flat: self-contained living space on the same lot as a main dwelling.
Do I need approval for a granny flat in WA?
Usually, yes. Whether you need planning approval, a building approval or both depends on your council and your design. We help you check before you order.
Does a unit on a trailer need approval?
It depends on your council and how the unit is installed. A unit that stays on its trailer base is often treated as a movable dwelling and may not need building approval. A permanently installed unit usually does. Always confirm with your local council.
How do you help with approvals?
We walk you through what your block needs before you order. Ask us for the floor plan and specifications to take to your council.
Customer reviews
See what owners across WA and QLD say about their Eco Portable.
Spread the cost with Credit One
Low-rate finance from more than 40 Australian lenders, with personal, business and rural options.
Subject to lender approval. Rates and terms are set by the lender.
Get your quote, or come and see one.
A real person replies within one business day.