Are there going to be any hidden costs in my granny flat quote?
What does it cost to build a granny flat?
At Backyard Grannys, we understand the importance of clear pricing and transparency. Our customisable floor plans offer remarkable value – giving you the flexibility to design and build the granny flat of your dreams, within your budget.
We provide a full turn‑key package, meaning our team will manage design, council approvals, construction and service connections so that your granny flat is ‘move‑in’ ready.
Our one-bedroom granny flat designs begin from $160,000; our two-bedroom designs begin from $175,000, and our 3-bedroom designs begin from $180,000. These are a guide only, as there are many factors that will determine the final price of your build. Unlock all the details—download our price guide below.
What affects the cost of a granny flat?
There are a variety of factors that will influence the cost of building your granny flat. These factors are not always apparent to new buyers at the start of the process (especially if you’re dealing with the wrong builder), so we’ve outlined the two key cost considerations you need to know about.
Site specific price considerations
- Site slope
- Service connections
- Soil conditions
- Bushfire (BAL) rating on your site
- Flood rating on your site
- Mine subsidence
Design specific price considerations
- Facade design
- Additional structures
- Interior design
- Fixtures and finishes
Our team are trained to evaluate your site and design preferences and provide you with a detailed quote, so you can create the perfect granny flat tailored to your vision—without stretching your budget.
Value you can see
As a family‑owned local business, we understand the importance of affordability and value. We utilise materials from brands you can trust and guarantee quality inclusions in every Backyard Grannys granny flat.
Ready to price your dream granny flat?
Download the Backyard Grannys price guide and see what’s included – then book a chat for your comprehensive quote.
