The My Granny Flat WA Difference


From $109,000

Choosing a builder to build your granny flat, extend or renovate your home is the single most important decision you will make when increasing your property’s appeal, value and function. When making your decision, consider a builder who specialises in building granny flats, extensions and renovations of enduring quality, design, and value. Consider My Granny Flat WA.

Why Consider Us?

  • We build fully featured homes, not prefabricated 'kit' homes
  • Superior quality double-brick and tile/COLORBOND® construction
  • Our designs integrate with and complement your existing home
  • We custom build granny flats to your exact specification
  • Deal with the builder direct, from design to handover
  • Our standard inclusions are other builders ‘extras’ or ‘upgrades’
  • Over 20 years of active and continuous industry experience
  • Our fixed price contracts mean no nasty surprise costs
  • We take care of every detail from concept to completion

What we include above the others >

Best Build Quality | Superior Double-Brick Advantage

My Granny Flat WA was established to provide a superior quality, double-brick and tile alternative for clients seeking to build a granny flat that not only provides comfort all year round for its occupants, but will maintain its aesthetic appeal and structural integrity for many years to come. All our granny flats are solidly built and meticulously finished double-brick buildings. This means better construction, better insulation, and better energy efficiency, as well as better sound proofing and better fire and pest resistance. Combining great design with quality materials and meticulous workmanship goes a long way to maximising your return on investment, boosting the value of the primary dwelling and the respective rents for both dwellings.

The Double-Brick Advantage >

The My Granny Flat WA Difference

Fully Featured Home, Customised to your Needs

Why buy a prefabricated building when you can have a granny flat that is constructed as a fully featured home intelligently and individually designed to optimise the amount of space available? Many Perth builders will offer you a kit granny flat or a narrow selection of inflexible plans. Not at My Granny Flat WA. Our granny flats are treated with the same attention to detail as a new home build.

Specialists in Custom Built Quality Granny Flats

My Granny Flat WA are specialist granny flat builders in Perth who provide a complete design and build service. From your first obligation free on-site consultation through to granny flat design, shire approvals, site preparation and construction, rest assured you will have the most experienced team working in your backyard. Our handpicked team of specialist craftsmen is led by Daren Sublet, a talented and highly skilled licensed building practitioner who brings a lifetime of industry experience to the table.

Unlike your average project builder, My Granny Flat WA has the specialist knowledge and expertise needed to reach beyond the ordinary and build the highest quality granny flats available throughout Perth. The ‘one size fits all’ mind-set of most builders does not apply with us. As a custom granny flat builder we listen to your ideas and transform them into practical, functional and stylish design solutions. We take into account your lifestyle needs, personal style, block size, and budget, to deliver a granny flat that is the embodiment of you and a perfect fit for your family.

Quality Meets Value with our Custom Granny Flats

So when it comes time to build your new granny flat, we invite you to compare the quality, craftsmanship and value that comes with every My Granny Flat WA granny flat.

We promise you will love the work we do.

The My Granny Flat WA Difference



What our customers are saying…


There is a plethora of granny flat builders in Perth and as this was a first time build for us, it was a number one priority to find a builder we could completely trust. We wanted a builder who would put just as much care into building our granny flat than they would to a main home. My Granny Flat WA have exceeded our expectations. Daren kept us regularly updated and informed with the progress of the build and everything we asked to be done or changed, big or small, was never a problem. We are extremely impressed with the quality and workmanship of the build, it really is a fully featured home. Their professionalism and attention to detail was exemplary. We would like to thank My Granny Flat WA for building us a beautiful new granny flat and for all their meticulous work.

Pam & Gordon Smith - DARCH


Our Services

We specialise in the planning, designing, and managing of the construction of quality custom built granny flats tailored to fit your lifestyle needs, personal style, block size, and budget. From initial design through to completion we offer a complete build solution.

Learn More

Visit Our Display

We invite you to walk through and experience for yourself My Granny Flat WA's quality craftsmanship, attention to detail, features and benefits before you build. Discover why My Granny Flat WA is the essence of what a custom granny flat builder should be.

Display Now Open

About Us

My Granny Flat WA is a family owned and operated company based in Perth, Western Australia and rooted in the old fashioned virtues of integrity, honesty and commitment. Building is not only our occupation, it is our life choice and we love creating beautiful things.

Meet the Builder

Perth Granny Flat Display Home NOW OPEN!

See for yourself why our granny flats are in a league of their own.
Get in touch with us today to inspect our quality of craftsmanship and attention to detail firsthand.
CALL NOW: 0405 421 965

My Granny Flat WA Display Home

Perth’s Only Authentic Granny Flat Display

Our granny flat is not a factory display or showroom- what you see is what you get!

"All our granny flats are solidly built and meticulously finished double-brick buildings."