What is an Attached Granny Flat?

September 9, 2020

Have you always wanted to enjoy the financial benefits and lifestyle advantages of a Granny Flat on your property, but have limited backyard space? Attached Granny Flats are a popular option for those with smaller blocks of land, and are included in the government’s limited-time-only $25,000 HomeBuilder scheme. In this article, we unpack a few key facts about what exactly qualifies as an attached Granny Flat, and why they are such an attractive option.

Play Video

What is the definition of an Attached Granny Flat?

According to the Affordable Rental Housing State Environmental Planning Policy (NSW) 2009, a Granny Flat or secondary dwelling is referred to as a self-contained dwelling that is erected on a property in conjunction with another dwelling (the principal dwelling), and can be either attached to or detached from the principal dwelling.

A granny flat is considered ‘attached’ once it is within 900mm from the principal dwelling.

What are the benefits of an Attached Granny Flat?

For both savvy investors and family-oriented homeowners, Attached Granny Flats bring a wide range of benefits:

  • An Attached Granny Flat can work well for smaller blocks of land such as homeowners who live closer to the city, or for those who want to keep as much of their garden space as possible.
  • They provide that added level of security, supervision and closeness, for accommodating family members that are ageing, have a disability, or just generally need a little extra support.
  • Preserve your privacy while comfortably hosting guests or relatives, and reap the benefits of built-in babysitters!
  • It provides functional, versatile space that can even be used as a home office, allowing remote workers to join video conferences in a peaceful, professional and private manner. Plus, every Attached Granny Flat built by Cubitt’s includes the very latest in Wi-Fi technology as standard.
  • Cubitt’s Attached Granny Flats can be completely customised to suit your needs and tastes. For example, you can add wheelchair ramps and wider doorframes, extended outdoor decking and alfresco areas, or you can even design your Granny Flat to match the look and feel of your existing property.
  • Add substantial value to your existing property, and establish a regular form of passive income if you choose to lease the Attached Granny Flat. In today’s agile world, there are also more casual income opportunities at your disposal such as short-term Airbnb renting.

Are there any rules about what an Attached Granny Flat can and cannot include?

The Nation Construction Code (NCC) requires all Granny Flats to include a kitchen, a bath or shower, clothes washing facilities and a toilet. Another important requirement to help stop the spread of fire from one dwelling to another is a wall with an FRL (Fire Resistance Level) of not less than 60/60/60, or a masonry wall not less than 90mm thick, between the Granny Flat and principal dwelling

It is also preferred that there is no internal access between the Granny Flat and principal dwelling. If a door is provided, it would be need to be a self-closing door with solid core and a thickness of no less than 35mm.

Are there any advantages to building an Attached Granny Flat in the next few months?

An attached Granny Flat is included in the government’s HomeBuilder scheme. This means that eligible home owner-occupiers are provided with a $25,000 grant to substantially renovate their existing home. However, the building contract must be signed before 31st December 2020, with construction commencing within three months of the contract date. So don’t delay, make the most of this limited-time-only opportunity.


An Australian, family-run business for over 25 years, Cubitt’s is passionate about providing our customers with a transparent and stress-free approach to building their dream project. That’s why we proudly offer award-winning customer service and a dedicated project manager to every customer, to keep them informed every step of the way. We have handpicked the best and most reliable tradesmen in the industry to provide quality workmanship, while our experienced council planning and drafting teams understand the intricacies of working with local councils throughout NSW and the ACT.

Cubitt’s provides a wide range of building solutions including Granny Flats, home extensions, custom build options, Peace of Mind electrical services and Home Tech packages. Get in touch with our team today on 1300 721 150.





Recent Blogs

Flood-Proofing Your Granny Flat – What You Need To Know

The idea of building a Granny Flat is exciting and it can be easy to get carried away, however it’s important to carry out the appropriate research before getting started. Be sure to consult both your local council and state government laws, as these will vary depending on your area.

Read More

With Interest Rates Going Up – Is a Granny Flat Your Best Option?

A Granny Flat could help you insulate your lifestyle against cost of living and interest rate rises. Building a Granny Flat on an existing property allows you to make the most of every square foot of your home, you’d be surprised how spacious they can be!

Read More

Gaining Approval for your Granny Flat in NSW

The idea of building a Granny Flat is exciting and it can be easy to get carried away, however it’s important to carry out the appropriate research before getting started. Be sure to consult both your local council and state government laws, as these will vary depending on your area.

Read More

How to make the most out of your Granny Flat

Looking for an investment, flexible accommodation or a future rental property? Granny Flats are a practical and cost-effective investment that can be designed to suit any use, whether you’re wanting a pool house, teenagers retreat or Airbnb.

Read More

Requirements for Secondary Residences in the ACT

Granny Flats are known as ‘secondary residences’ in the ACT and are required to comply with regulations that are slightly different to those in NSW, hence why it is so important to refer to your local and state laws in the planning stages.

Read More

Researching and Planning a Granny Flat? Here’s Why The Greater Sydney Lockdown is The Perfect Time!

At Cubitt’s, we get it – Cubitt’s understand your needs. With maximizing your property’s space whilst keeping family close such a hot topic, we wanted to give you a strong outline of why a Granny Flat is the perfect solution to plan for now. Now that we are in a lockdown, there has never been a better time to plan for your Granny Flat.

Read More