(08) 9408 6399


Recent changes to the law in WA mean you can now build a granny flat and rent it out to non-family members – without having to subdivide your land. Granny flats are no longer for retirees. Whether you’re looking for ways to maximise the potential of your backyard, looking to accommodate a growing family or looking to increase potential returns on your investments, a granny flat is a smart, versatile and cost effective way to expand, and the team at Granny Flats by Hallmark Developments will be only to happy to discuss your requirements.

Our self-contained units traditionally have one or two bedrooms, a bathroom/ laundry, kitchen and a living area within a space of 60-70 M2

All Hallmarks Granny Flats/Micro homes are installed on site and to the highest of finish quality and specification.

These are NOT lightweight transportable units or steel lightweight frame glorified sheds offering poor insulation and doing very little to enhance the value of your property but solidly built, double brick homes to last a lifetime and ultimately adding value

Hallmark Developments are registered builders in Perth who also specialise in home additions, these micro homes are not just limited to being a stand-alone item. If your yard doesn’t lend itself to a stand-alone unit, we can design an addition that will blend in with your existing home, but still be self-contained and offer all the features a granny flat or micro home will offer.

Access is rarely a problem for all of our granny flats or additions as materials can be carried by hand into back yards if gate access is the only option.

Alternative custom designs are available upon request.

Please click on our range of designs or simply look at our Granny Flat gallery pages to see what Granny Flats by Hallmark can do for you

Please fill in your contact details below, for more information about Granny Flats in Perth, Western Australia.

WA Approvals

We will take care of all shire planning approvals and obtain the building licence required from your local authority.

  • Quality Land Surveying
  • Thorough Property Searches
  • Building Code Compliance
  • Quick Approval Process

Granny Flat Designs

We design Granny Flat Floor Plans which are optimized for residential properties in Perth. Every site is unique and so are our plans.

  • Open Plan Designs.
  • Brick Built
  • Builders Reg No 13838
  • Specifications to suit your budget


"We selected Hallmark after a careful and extensive research of eight building contractors. Our main requirement was a trouble free project with no adverse surprises or hassles over trivial variations. We can honestly say that Hallmark delivered on all fronts. Hallmark’s tradespeople were all obliging, friendly and highly professional, a pleasure to have around. In []"

Grace & Glyn – Connolly

"We found Mark to be a creative and intelligent builder who got the most out of our limited space.The end result increased the value of our home considerably. Perhaps more importantly though it enabled our family to have a much more liveable and functional home."

Mark & Melinda (Bayswater)

Looking at other ideas for your home or considering building?

Please take a look at our Home Building website

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Get In Touch With Us


2/49 Boranup Ave
Clarkson WA 6030

Postal Address:
PO Box 2693,
Clarkson, WA 6030


T: + 61 (0) 8 9408 6399