West Coast Granny Flats: Perth’s high-quality granny flat builder.

West Coast Granny Flats specialises in quality built granny flats, designed to compliment the main residence and therefore maximise the overall property value.

West Coast Granny Flats is backed by Addstyle Master Builders, Western Australia’s most awarded home renovation and extension builder for almost 30 years. The WCGF team comprises of  experienced building professionals and proven tradespeople, so West Coast Granny Flats clients can rest assured that their granny flat project is in the safest of hands.

West Coast Granny Flats builds superior quality, double-brick and tile or Colorbond, custom-finished granny flats at a comparable cost to pre-fabricated alternatives. As a result, a West Coast Granny Flats home is high-quality, durable and comfortable to live in year-round.

With granny flat designs starting at only $109,990 you can now add a quality-built granny flat to your property for an affordable price. All our granny flats include custom cabinetry and appliances and are constructed in face brick or render, tile or Colorbond, and are finished to compliment your main home and therefore maximise the overall property value.

West Coast Granny Flats are generally completed within 10-12 weeks and are constructed with minimal disruption.

For an obligation-free discussion about adding a granny flat to your property contact one of our granny flat experts today on (08) 9207 1900 or via the CONTACT US page of this website.


The Security of a Builder that has been around for 30 years: Addstyle Constructions was established in 1988 and has been providing a complete ‘design and build’ home renovation,  extension, and custom build service to the Perth market for almost 30 years. Addstyle specialises in custom designed home renovations, house extensions, second storey additions, granny flats and new homes.

In 2014 Addstyle launched the granny flat specialist division, West Coast Granny Flats to provide ‘off the plan’ granny flat design options to the granny flat market. West Coast Granny Flat designs are all carefully devised to provide a selection of cost-efficient design options while still providing the quality the Addstyle brand is renowned for. All West Coast Granny flat designs can be further customised to be incorporated under the main roof, or to suit the block space.

The granny flat market in Perth is fickle and many companies have come and gone. As a division of Addstyle, West Coast Granny Flats has the security of a strong parent company that has survived the Perth market for almost 30 years. The importance of this cannot be underestimated.

The Industry Accolades and Consistency of Success: Addstyle Constructions is Perth’s most awarded home improvement builder, as peer-judged by the Master Builders Association and Housing Industry Association. Addstyle has won an unprecedented number of awards for housing excellence including granny flats projects for West Coast Granny Flats.

The Close Attention of a specialist Builder: At West Coast Granny Flats we genuinely limit the number of granny flats that each Project Manager supervises in order to ensure regular, close, and expert attention to each and every project and to ensure that only the best-quality tradespeople are engaged to undertake our work. Every West Coast Granny Flat client should feel like they are our only client.

Quality that can be seen and will pass the test of time: A West Coast Granny Flats home is constructed using traditional double-brick. This not only provides a superior quality product that is more durable and comfortable to live in, it also has a superior look and feel to pre-fab products. Double brick can be matched to the feature-brick of the main home or rendered and coloured to compliment it. It will therefore maximise the value and appeal of the overall property, rather than looking like an after thought or glorified shed.

The Buying Power of a large Builder:  Addstyle Constructions is a founding member of Western Australia’s largest building cooperative and therefore has the advantage that comes from economies of scale, without the restrictions of vertical integration.

The Convenience of a Full-service Company: West Coast Granny Flats provides a complete design and build service including concept ideas prepared by an expert team of designers, high-teck presentation drawings and artist’s impressions, full drawings and all shire approvals, selections advice, demolition and earthworks, project construction and maintenance.

The Security of a Transparent, Fixed Price Contract: West Coast Granny Flats provides a thorough Contract Specification setting out every item included in the project coupled with a fixed price building contract.

The Quality Difference that comes from Close Supervision: West Coast Granny Flats has a genuinely low project manager to client ratio to ensure that every project is supervised on a regular basis. Our building supervisors must have a minimum 20 years on-site experience, and every project is also overseen by a construction manager and a dedicated client liaison manager.

The Expertise of a Qualified and Experienced Team: West Coast Granny Flats has very strict recruitment requirements to ensure that all building staff and tradepeople have not only the expertise, but the experience to ensure the highest standards in quality.

The Customer Service that comes from a Family Owned and Operated Business: West Coast Granny Flats is a second-generation, family-owned and operated company. Our work reflects upon our family name and our passion for quality building that spans three generations.