Granny Flat Southern Highlands | Bowral | Mittagong | Moss Vale | Berrima | Goulburn | Illawarra

The Granny Flat Builders Highlands locals trust

When it comes to Granny Flat builders, Highlands locals turn to Cubitt’s time and time again. Why? Not only have we been in business for almost 30 years, we also offer a comprehensive one-stop Granny Flat service which makes installing your dream flat not just possible, but positively easy. Visit our showrooms in Wollongong or Canberra to visualise the possibilities and see why our modern Granny Flats are the perfect fit for the beautiful Southern Highlands region.


Our premium quality, spacious Granny Flats can be tailored to suit your exact needs, style and budget. Whether you’re investing in a Granny Flat to rent out, add value to your home or house your family members, we’ll handle everything from design and approvals to approvals and construction. View our full-size display Granny Flats at our Wollongong or Canberra showroom. Open 6 days a week, our Granny Flats are available for walk-throughs, with expert local sales and design consultants on hand to help you make the best use of your land and plan your dream Granny Flat.



No Obligation Free In-Home Consultation

Interested in finding out how to make a positive investment from a Cubitt's Granny Flat or Home Extension? Get in touch for a no-obligation site inspection today.

Or call:

2023 Free In-Home Consultation Form

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Visit Our Display Centre



Cubitt's Display Centre

244 Shellharbour Road,
Barrack Heights NSW 2528

Opening Hours:
Tuesday-Saturday: 9am-5pm


Your one-stop Granny Flat solution in Southern Highlands

At Cubitt’s, we’re here to make designing and building your dream Granny Flat as easy and stress-free as possible. With so many financial benefits and the availability of ever more modern and stylish Granny Flat designs, Highlands locals are increasingly seeing the value of adding a Granny Flat to their home. However, between gaining council approval and finding a Granny Flat design that fits their land, needs and budget, many families struggle to feel confident in the Granny Flat Process. That’s where we come in!

We specialise in building turnkey Granny Flats which are tenant-ready from the moment we hand over the keys. From initial conception and design to council approvals and all the finishing touches, we’re your full-service Granny Flat builders. Whether you want to add an extra income stream through renting out your Granny Flat or want to future-proof your family with a self-contained additional dwelling, our professional local experts will help you make the right choices to get more value from your property.

With 100% free, no-obligation feasibility studies and consultations, we can help you visualise the possibilities for a Granny Flat on your property. Visit our Wollongong Granny Flats showroom today to learn more and get inspired!

2 Beds
1 Bath
60 m2
2 Beds
1 Bath
90 m2
2 Beds
1 Bath
60 m2
2 Beds
1 Bath
72 m2
1 Bed
1 Bath
52 m2
1 Bed
1 Bath
56 m2
3 Beds
1 Bath
60 m2
3 Beds
2 Baths
90 m2

Why Southern Highlands Granny Flats are on the rise

If you live in the Southern Highlands and Illawarra regions, building a Granny Flat on your property is one of the savviest investments you can make. A Granny Flat is the ultimate flexible investment, providing multiple ways to improve your lifestyle and boost your income. 

The extra land on your property could be adding value to your property, earning you a steady income or providing flexible housing for your family – all you have to do is take the first step. Reach out to our expert Southern Highlands Granny Flat builders, designers and consultants to get started and arrange your free, no-obligation quote. 


Holiday rental
The NSW Southern Highlands is one of the most scenic and sought-after holiday spots around. Take advantage of the demand for holiday accommodation by listing your Granny Flat on Airbnb or Stayz and keep it free for out-of-town visitors when you need it! At Cubitt’s, we specialise in desirable Granny Flat designs Southern Highlands holidaymakers will love.


Long term rental
Rent out your Granny Flat to a long-term tenant and enjoy a steady flow of rental income. With an increasing demand for affordable housing in the Southern Highlands area, your Granny Flat is bound to be snapped up.


Student accommodation
Granny Flats make excellent affordable student accommodation, providing the perfect balance of independence and security for new home leavers.


Secure family housing
From a teenagers’ retreat to independent, safe housing for your elderly family members, a Granny Flat is the clever way to be a family. Gain flexibility and freedom with a Granny Flat and invest the money you might have spent on a nursing home into your own property instead.


Home office
If you are at a stage of your life where you are wanting to spend less time in the office and more time at home with your family, you can reduce or replace your number of working hours with passive income from building a new Granny Flat.

Your one-stop service Granny Flat builders in Southern Highlands, Bowral, Mittagong

At Cubitt’s, we’re proud to have built custom Granny Flats in Southern Highlands for decades, and we’ve developed a reputation for impeccable quality and exceptional customer service. Whether you’re a complete beginner or looking to add to your Granny Flat portfolio, our friendly expert consultants can ensure the ultimate experience for the duration of your Granny Flat project. 

If you have a unique vision for your Southern Highlands Granny Flat, our dedicated team will bring it to life! We’ll pull out all the stops to ensure you get exactly what you are after and our experienced local Granny Flat builders in Southern Highlands will ensure you are 100% satisfied with the final results.

Need help designing your Granny Flat? We can help you there too. Our team will work closely with you to design a Granny Flat that will suit your purpose, lifestyle and specific needs. We have helped hundreds of clients turn their bundle of ideas into a fabulous reality by sharing our own experiences and applying our expertise to their unique sites.

With over 28 years of experience, Cubitt’s Granny Flats and Home Extensions has grown to be one of the most trusted names for Granny Flat designs in Southern Highlands. As an Australian family-owned business, we take pride in our work and continue to provide excellence in everything we do. When you choose Cubitt’s, you can expect quality service, a transparent process and impressive results.

Visit our Wollongong or Canberra Granny Flat showroom today and arrange your free feasibility study, design and quote today. 

Maximise your backyard’s potential and call 1300 721 150 to discover the benefits of partnering with the most trusted Granny Flat builder in NSW and the ACT.

  • Full-service Granny Flat builders

    Southern Highlands homeowners don’t have time to go chasing after contractors and follow up endless quotes, so we take care of everything in-house! From council permissions to planning, design and construction, we’ll handle everything for you. 

  • Custom designs

    Want your Granny Flat to match your main property? Need additional rooms, an outdoor entertaining area of additional accessibility features? We’ve got you covered. We offer a range of customisations for no extra cost as part of our in-house design process.

  • Local tradespeople

    Get your Southern Highlands Granny Flat built by local experts who understand the unique challenges and benefits of building on the NSW Highlands. 

  • Turnkey Granny Flats

    From the moment we hand over the keys your Granny Flat is good to go! Get tenants, guests or family straight into your home with all amenities and a range of furnishings included as standard. 

  • Guaranteed quality

    We’re fully insured and come equipped with decades of experience so you can rest assured that your Granny Flat will be of the utmost quality. We use only the best tried-and-tested materials installed by trusted local builders for the optimum Granny Flat results. 



Download Our Granny Flat Design Collection Brochure

NEW DESIGNS LAUNCHED OCTOBER! View the 10 NEW Energy Efficient NSW Designs, each with 4 or 5 façade options. Download the ACT Designs, each meeting the Liveable and Adaptable Housing Standard requirements


We love the house we brought our babies home to, now we love it more because we have space for them as teenagers!

- Kim, Spring Hill NSW



Frequently Asked Questions

Cubitt's Granny Flats Available to
View at our Wollongong Location



2 Bedroom   |   60m2  | Granny Flat

The Warilla is most like our 2024 model, The Byron which is upgraded to meet National Construction Code requirements. The Byron features a bathroom plus a separate laundry with toilet. Read the blog.




2 Bedroom   |   60m2  | Granny Flat

The Berkely is available as an upgraded 2024 model, and can meet National Construction Code requirements. There will be some modifications to the home on display to meet the requirements.




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