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  • Writer's pictureBibin Babu

5 Common Mistakes to Avoid When Building a Granny Flat

Updated: Mar 2, 2023



Granny flats are a great way to add additional living space to your property. Whether you're looking to create a home for a family member, generate income from granny flat or simply add some extra square footage, building a granny flat can be a wise investment.


However, like any home improvement project, building a granny flat can also come with its own set of challenges. To help you avoid common mistakes and ensure a successful build a granny flat, we've put together a list of the five most common mistakes to avoid when building a granny flat.


5 Common Mistakes people makes when building a Granny Flat


  1. Not obtaining proper permits

  2. Underestimating costs

  3. Skimping on design

  4. Failing to consider accessibility

  5. Hiring an inexperienced contractor



1. Not obtaining proper permits


One of the biggest mistakes homeowners make when building a granny flat is failing to obtain proper permits. Before you begin any construction, it is important to research your local zoning laws and building codes to ensure that you are able to build a granny flat on your property. Not obtaining proper permits can result in costly fines, delays, and even the need to tear down the structure if it does not meet local regulations. See our 5 Simple Steps guide to build a granny flat


2. Underestimating costs


Another common mistake is underestimating the cost of building a granny flat. It is important to create a comprehensive budget that includes not only construction costs, but also the cost of permits, utilities, and any other expenses related to the build. Failing to account for all of these costs can lead to unexpected expenses and a project that goes over budget.


3. Skimping on design


While it may be tempting to cut corners on granny flat design to save money, this can lead to a granny flat that is cramped, poorly lit, and not functional. A well-designed granny flat will not only provide a comfortable living space for its occupants, but it will also add value to your property. It's important to invest in a quality design that takes into account the specific needs and wants of those who will be living in the granny flat. See our 1 Bedroom Granny Flat Designs and 2 Bedroom Granny Flat Designs.


4. Failing to consider accessibility


Another important factor to consider when building a granny flat is accessibility. If the granny flat will be occupied by someone with mobility issues, it is important to design it with accessibility in mind. This may include features such as wider doorways, ramp access, and a bathroom with grab bars. Failing to consider accessibility can make the granny flat difficult or impossible for certain people to use.

5. Hiring an inexperienced contractor


Finally, one of the biggest mistakes homeowners make when building a granny flat is hiring an inexperienced contractor. It is important to do your research and choose a good granny flat bilder with a proven track record of building high-quality granny flats. An experienced contractor will be able to guide you through the process and help you avoid common mistakes, while a less experienced contractor may cut corners or make costly mistakes.



In conclusion, building a granny flat can be a great way to add additional living space to your property, but it is important to avoid common mistakes in order to ensure a successful build. From obtaining proper permits to hiring an experienced contractor, following these tips will help you save time and money on your granny flat build and ensure that it is a success.


As "Granny Flat Experts" we recommend that you consult with professionals to guide you through the process to avoid the mistakes on building you dream granny flat "




The Granny Flat Experts blog is a leading Australian website for providing advice and information about granny flats.






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