3 bedroom granny flats: designs, prices & floor plans

The building process usually takes around 12-16 weeks. Once you’ve selected your design and inclusions, approvals are complete, and your contract has been signed our team will then issue a start date.

Our designs can comfortably accommodate families of two to four people, making them a popular choice for Airbnb hosts, property investors and those who have frequent guests. Whether your flat is an investment property or simply an investment in your family’s future, you’re guaranteed to see real value from your Granny Flat. Here are some of the reasons our clients choose our 3  Bedroom Granny Flat designs:

• Guest House: creating a guest house space for family or friends is one of the most common reasons homeowners build granny flats. Self-contained units allow us to spend extended time with the people we love while still having our own space and privacy – it’s the perfect solution for short or long-term visits from loved ones.
• Extra Room for Family: Whether you’re looking for a retreat for your teenager or a place for elderly parents to go when they need more support but can still care for themselves, a self-contained granny flat is an ideal solution. This gives everyone in the family the support they need, while maintaining privacy and independence.
• Workspace/Studio/Study Nooks: a 3 bedroom flat can be a great option for student accommodation or creating an at-home office if multiple people are working from home. Or dedicated studio space for artists – whether at home or rented out. Having three bedrooms provides you with a variety of options for your family or an additional income stream – the possibilities are endless!
• Rental Asset or Airbnb: renting or holiday leasing your granny flat can be a great way of making additional income. Not only can your flat bring in additional revenue, but it’s a great way to positively gear your property. This can work well as a holiday guest house (depending on your location) or even short-term rental property.
• Entry to the Property Market: some people build granny flats – usually on a parents property – as a means of entering the property market. This can be a great option for young adults trying to get a head-start financially.
• Grey Nomad Base: if you’re looking to retire soon and looking for a more cost-effective home base solution while you enjoy some travel, a granny flat added to one of your children’s property can be a great option that saves you money now and is an investment for your children in the future.

The minimum size you can build a granny flat is approximately 40 square metres. This size is for the total build and it’s important to remember the internal size of your granny flat will be under this. For example, one of our cheap granny flats is a one-bedroom design and the internal size of the flat is around 36 square metres.

On average, a complete three-bed granny flat tends to cost between $145,000 and $160,000. This price should include site costs, designs, approvals, build price and standard inclusions, and full turnkey ready-to-move-in.

In general, an extension to your existing home will likely be cheaper, as you won’t need to feed plumbing, electricity, materials, etc. to an area separate from the main dwelling. However, an extension of your home may not be possible or may not provide the amount of space or privacy you’re looking for – especially if you’re wanting to add the amount of space a 3-bedroom granny flat would provide. A self-contained granny flat will likely be more expensive, however, it will bring more value to the property and to your family.