Home Extensions

Granny Flats WA can create your new kitchen, deluxe bathroom, home office, pool house, games room or we can work with you for a plan to completely renovate your home. Have a look at some home improvements we have built in our gallery.

The possibilities are endless as every granny flat or home addition we build has been tailor made to the needs, wants and budget of each client. Please have a look at some floor layouts we have constructed in the past.

Beautiful Extensions
and Home Improvements

Seamless Home Extensions

Our home extensions are designed to blend in seamlessly with your existing home and are designed to help you make room for a growing family and can add value to your home.

We don’t just build granny flats in Perth. We will make the entire process of extending your home stress free. Get started with a no obligation consultation with one of our design consultants today.


Thurtle Woodvale
Martin Ave Extension
Thonpson Floreat Extension


I have been most impressed with the dealings I have had with Granny Flats WA. The service I received and process of purchasing a granny flat was easy and well informed. Mike is very personable and lovely to deal with. He went out of his way to assist and meet my various requests and I have no hesitation in recommending him for his integrity, attention to detail and friendliness.

Belinda McClelland

Excellent from start to finish. Delivered exactly what we discussed. Our site Manager was always punctual and kept in touch, a pleasure to deal with. We are thrilled with the results of both our ensuite addition and renovation as well as our Granny Flat. Even nearly a year after the fact, if we have any questions or concerns they are quick to respond and always happy to help. Would not hesitate to recommend them, and would happily show our renovations and Granny Flat to anyone who was considering using GFWA.

Scott Fry

Fantastic we are so pleased with our room extension to our house. Dealing with this company has been a pleasure with everything delivered as promised on time and on budget All the tradesman were brilliant and easy to deal with and the Site Supervisor was great to deal with. Couldn't recommend this company more highly and both my wife and I are very very pleased.

Michael Webster

Just a big Thanks to you all. It is our second renovation with your company and dealing with your workman has been a pleasure, again. It is our first bathroom reno and by having your team well organised made it all go according to schedule and on price. We are saving up for the other bathroom now. I do appreciate receiving the product and service that we agreed upon.

Tony Mathers


What extension services does Granny Flats WA offer?

As both a design and build construction company, Granny Flats WA undertakes the whole process from on site design and consult, professional drafting, council approvals, full construction, painting and decorating and in most cases air-conditioning.

What type of extensions does Granny Flats WA Undertake?

All additions catering from a simple 3m x 3m bedroom addition, ensuite additions, games room additions right up to extensive renovation and addition work priced up to $500,000.

What materials does Granny Flats WA Build with?

We build with mostly steel frame and double brick, however we are able to customize from any available products as requested and preferred by our clients. We design and consult to build both budget additions or fully integrated seamless additions to a home.

How long does it take to undertake extensions?

Steel frame room additions can be completed in as little as 6 weeks. Adding a bathroom can add another 2 to 3 weeks. Building in brick will extend the time of the build due to more trades being involved.

Send Us An Enquiry

Booragoon Showroom

92 McCoy Street, Booragoon, WA 6154
08 9329 6888

Mailing Address

PO Box 4459
WA 6960