Granny Flats by Hallmark

See what local homeowners are saying

• EFElad F28 July 2025

  Hallmark did a great job building our granny flat. Mark was fantastic to deal with—honest, reliable, and made the whole process easy. The build was high quality and finished on time. Would happily rec...

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  Hallmark did a great job building our granny flat. Mark was fantastic to deal with—honest, reliable, and made the whole process easy. The build was high quality and finished on time. Would happily recommend them to anyone!

• D&Drew C28 July 2025

  We had a superb experience when Mark and his team built a custom designed garage and upstairs ancillary accommodation from our drafted plans. The project was delivered quite quickly in a very tight ac...

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  We had a superb experience when Mark and his team built a custom designed garage and upstairs ancillary accommodation from our drafted plans. The project was delivered quite quickly in a very tight access space with minimal disruption to our backyard. Nothing was too much trouble as we changed a few things during the build. The tradespeople were all lovely, trustworthy, quality and professional. We would definitely look to Mark if we were to do a similar build again in the future. Thank you team for a great experience and putting us at ease for what can be a very stressful exercise.

• FRFran26 June 2025

  Had Mark build a large custom granny flat, from start to finish was amazing. Nothing was an issue and easy to work with. Highly recommend build to anyone thinking of putting an addition on their prope...

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  Had Mark build a large custom granny flat, from start to finish was amazing. Nothing was an issue and easy to work with. Highly recommend build to anyone thinking of putting an addition on their property Thank you mark wonderful job!

• LELolly E2 Oct 2024

  A personalized, professional experience during these build works from Mark and his team. What we thought would be a nightmare at the back yard with noise, drilling, digging and more, turned out to be...

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  A personalized, professional experience during these build works from Mark and his team. What we thought would be a nightmare at the back yard with noise, drilling, digging and more, turned out to be a fun experience with his team as we communicated, chatted, drank coffee or tea on the freezing days and just shared opinions about the growth of the works as they happened. Mark and team were always open to suggestions and feedback as works progressed, and this made the entire experience smooth running, to deadline, with a super quality finish, exceeding our expectations.. Thanks Hallmark!. Well done- John and Lauretta.

• BObelinda O30 Sept 2024

  We couldn't be happier with the experience we had with Hallmark Developments for our home addition. From start to finish, their quality of work was outstanding, with every detail handled meticulously....

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  We couldn't be happier with the experience we had with Hallmark Developments for our home addition. From start to finish, their quality of work was outstanding, with every detail handled meticulously. Mark and his team were extremely professional, always keeping us informed and providing honest advice that made the process smooth and worry-free. They were also impressively prompt, completing the project on time without cutting corners. It's rare to find a company that combines such high-quality craftsmanship with transparency and efficiency. We highly recommend Hallmark Developments to anyone looking for a reliable and skilled builder!"

• MWMurray W2 Apr 2025

  Outstanding experience. From 1st consultation to handover we've been more than impressed with the first class service and attention to detail delivered by Mark and the team. We now have two amazing sp...

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  Outstanding experience. From 1st consultation to handover we've been more than impressed with the first class service and attention to detail delivered by Mark and the team. We now have two amazing spaces to enjoy the wonderful West Oz lifestyle.