Are you ready to unlock the
full potential of your backyard?
Backyard Grannys, award-winning granny flat builders in Newcastle and the Hunter.
15 years of expertise and 1,500+ successful projects.
Explore real investor case studies, rental potential and granny flat designs built for strong returns.
Keep loved ones close with a comfortable, independent space of their own.
Create a home office, studio, pool house
or private retreat that adds flexibility
and value.
Explore our recent projects
Looking for the ultimate in granny flat inspiration? Our recent projects showcase the many combinations of finishes and selections that are possible - each granny flat is as unique as the people who build them.
Why Backyard Grannys
The Story Behind Backyard Grannys
When Alex founded Backyard Grannys, he saw an opportunity to create a granny flat building experience that genuinely put the customer first. More than 1,500 completed projects later, that same vision still guides everything we do.
Whether you are building for family, investment or greater flexibility, our approach is the same. We take the time to understand what you need, guide you through your options and manage the process from design through to construction.
Hear what our customers have to say
"I have just had a Granny Flat completed and could not be happier with the result. Communication and work quality were of the highest standard. My Supervisor Isaac provided excellent communication and was happy to work with me to achieve an optimal result for all stakeholders. I highly recommend Backyard Grannys and am just about to start my next one with them 😊"
"We’re really happy with our granny flat by Backyard Grannys. Every step of the way we had great service and the team was responsive throughout the process. Backyard Grannys literally looked after everything - from the survey, design, DA and trades. The finished product is awesome and super high quality. Would happily recommend Backyard Grannys to friends and family."
"Another great build with Backyard Grannys. We did our second granny flat with the Backyard Granny team and got the same great result. Great communication, value and speed of construction will ensure we go back to them again. Thanks to Jack, Annette and the team."
Granny Flat Guides & Resources
How it works
Our experienced team seamlessly manage each project from concept to completion, working in partnership with you to ensure that building your granny flat is a rewarding experience.
Frequently Asked Questions
How much does a granny flat cost?
A granny flat in Newcastle typically costs from $185,000 for a one-bedroom, $200,000 for a two-bedroom and $210,000 for a three-bedroom design. Two-storey granny flats start from $325,000.
The final cost of your granny flat will depend on factors including your chosen design, site conditions, approval requirements, service connections, finishes, design modifications and any additional works required for your property.
We can assess your property and provide more accurate advice on what is possible and what your project is likely to involve. You can also download our Price Guide to explore price considerations in more detail.
Do I need council approval for a granny flat
Yes. Every granny flat in NSW needs approval, but most do not need a full council application.
Where your block meets the standards, a granny flat can be approved as complying development through a private certifier, which is faster and more predictable than a Development Application. Where it does not, a DA with your local council is the alternative. We manage the approval either way.
Book a free site assessment and we’ll assess your property, explain the likely approval pathway and give you a clearer idea of what is possible and what your project is likely to involve.
How big is a granny flat?
A granny flat in NSW can be up to 60m² of internal floor area, the maximum permitted under complying development, regardless of how many bedrooms it has.
Our designs start at 36m² for a compact one-bedroom, with two and three-bedroom layouts making full use of the 60m². Covered patios and decks generally sit outside that calculation. Browse the range.
Does a granny flat add value to your property?
Yes, in two ways: rental income and the value of the property itself.
A granny flat creates a second income stream on land you already own, and adds a fully self-contained dwelling to your title. In the Newcastle and Hunter region our two-bedroom granny flats typically rent for $550 to $700 per week.
Our investor information sets out the returns in more detail.
How long does it take to build a granny flat?
A granny flat typically takes 16-20 weeks to complete once construction starts.
Before construction, allow around 3–4 weeks for design and a further 6–16 weeks for approvals. The approval timeframe will depend on your property and whether the project can proceed through a Complying Development Certificate (CDC) or requires a Development Application (DA).
Granny flat construction is generally more predictable than a larger residential build, although site conditions, weather, design complexity and changes made during the process can affect the timeframe.
As part of your free site assessment, we’ll assess your property, explain the likely approval pathway and give you an indicative project timeline. Once your project is underway, we’ll keep you updated at each stage.