Granny Flats and Home Additions

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08 9329 6888

Granny Flats WA – Home Extensions & Renovations

Granny Flats WA is a Family owned and operated Perth residential Building company having serviced the Perth metropolitan area for over 20 years.

Granny Flats WA has long been Perth’s trusted builder for Granny Flats, renovations and extensions. We have many years’ experience and know-how and we care about providing you with a beautiful finished product you can be proud of and enjoy.

Most people know that we build granny flats, but did you know that we also build renovations and extensions: from a small studio or office all the way to a complete home renovation to transform your 2 bedroom, 1 bathroom home into a 5 bedroom by 3 bathroom family home with pool and al fresco.

Of course we also build granny flats: we see them as micro homes in your back yard as we build them from concrete slab to finished structure. Every home is different and every home has differing privacy, lighting and existing structure particulars. Our trained Building & Design Consultants will listen to what your needs and wants are and can make an obligation free visit to your home to advise you on what will work best for your backyard taking into account all the circumstances of your budget and existing property layout.

Some clients like to build in stages. We can build a locked up structure for you with the necessary allowances for pre-lay plumbing so that you can elect when you wish to proceed with adding a bathroom, kitchen or laundry and decorating as your budget and needs require.

No doubt you’ve heard all about the changes to the laws recently allowing people to derive an income from renting out granny flats in their back yards. We have seen an increase in interest from investors and have some great stories.

Whether you are someone with with overseas relatives or friends, wanting a delineated home work space, a FIFO worker – or wanting rental income from a FIFO worker, wanting your parents or children to live close by, a granny flat or home improvement from Granny Flats WA can be your solution.

We have a showroom that showcase some of the options we can provide, we’d love you to bring your loved ones in and take a look around.

Granny Flats WA is a Family owned and operated Perth residential Building company having serviced the Perth metropolitan area for over 20 years. We provide a tailored personal service including:


Design Consultation & Advice




Energy Efficiency




Council Submission through both Planning Department and Building Departments as required


Pre-Start Service


Quantifying, Ordering & Scheduling






What designs are available in the Granny Flats WA range?

As a specialist builder of Granny Flats we work with our clients to design bespoke builds suitable to each client’s needs. We do have several pre-designs from which we can adjust, however all designs are individual incorporating any special needs such as considerations for mobility or open plan one, two or 3 bedroom dwellings. We build in ranges, from the investor rental design or standard specification, right through to our executive apartment specification as shown off in our showroom in Booragoon. We always suggest a showroom visit consultation prior to visiting the home to give you the best information for discussion when on site.

How long does a granny flat take to build?

For Granny flats up to 70sqm it would take approximately 10 weeks from slab down to complete including painting, floorcoverings, skirting boards, blinds and air-conditioning. Granny Flats WA will take care of all council approvals as part of the pre-process which will vary the time to build depending on local council approval processes.

What requirements are there to build a granny flat?

Under the standard R Codes a granny flat can be built on a single residential property over 450sqm. Considerations for setback and parking need be considered and in certain councils additional restrictions will apply.

What considerations need to be taken into account when building a granny flat?

Firstly a granny flat design needs to suit the purpose of the build whether it be for mobility, downsizing family or rental. Also designing to complement the existing residence avoiding clashing entertainment areas and windows looking directly to the existing home. This design service is provided free of charge after a showroom visit.

Book an appointment for a free consultation.

Show Room Details

Based south of the river in Booragoon this show room offers
3 indoor granny flat displays.

Phone: 08 9329 6888

Address: 92 McCoy Street Booragoon


Open: Mon – Thursday : 10am to 4pm
             Friday 10am to 2pm
             Saturday 10am to 12.30pm

All other times open by appointment.


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

Mailing Address

PO Box 4459
WA 6960