Leading Builders of Granny Flats and Home Extensions Since 1994

Cubitt's Granny Flats and Home Extensions is a proudly Australian, family-owned and operated business. We’ve been in business for over 28 years and during that time we’ve perfected the process of designing and building a wide range of modern Granny Flats and top-quality custom Home Extensions.

Explore exciting possibilities with a free site visit from one of our experienced design consultants. We’ll work within your budget to bring the most value to your project, whether through a highly marketable granny flat or a home extension that adds thousands in value to your home.


Granny Flat Investment - how Alex & Laura are building for the future

At Cubitt's we've built granny flat's for hundreds of families for myriad reasons including family, lifestyle, space and investment. It's always a privilidge to have one of our customers share their story with others....

Keen to build their investment portfolio, without compromising their lifestyle, our savvy young clients Alex and Laura chose Cubitt's to build a 3 bedroom granny flat on the rear of their investment property. After a seamless build process they are now achieving an additional rental return of $465 per week!

Laura says... "We want to travel and experience our life so we knew the affordability of a granny flat really worked for us". Watch the whole testimonial to hear about their granny flat build experience.


Book Your FREE
Video Consultation

Download Our Granny Flat Design Collection Brochure

View 35+ Brand New Stylish and Functional Designs and Floorplans. Download our ACT or NSW Design Brochures


Flexible Granny Flats

Whether you want a great source of rental income or want to keep your family close, we’ve got a Granny Flat design to suit you.

Your vision is our priority and whatever goals you have for your new granny flat we’ll help you design and build a smart, modern Granny Flat that ticks all the boxes. We’re here to collaborate with you and your dedicated consultant will guide you through every stage from feasibility study to design, building and completion.

As experienced Granny Flat builders, you can expect quality service, exceptional workmanship and award-winning Granny Flat design when you choose to work with Cubitt’s.


How Do We Do It?

The best Granny Flat floor plans to suit your lifestyle

  • Full turn-key service means your Granny Flat will be tenant-ready as soon as we hand over the keys
  • Clear, upfront Granny Flat prices with no hidden costs
  • Award-winning customer service
  • Easy Granny Flat approval with help from our in-house council planning and drafting team
  • Tradies you’ll love
  • Your own, dedicated Project Manager.


9 Display Granny Flats across 4 locations

Our Complete
Inclusions Guide

Complete your Granny Flat with quality inclusions in every room. Here you get to select the finer details, colour scheme, fixtures and fittings that will bring your Granny Flat to life and make it uniquely yours. Cubitt’s offers two Inclusions Ranges for our clients to choose from, with an additional option to upgrade certain items.



Home Extensions

Our high-quality Home Extensions and renovations not only provide more space for living but also increase the value of your property. Whether you want to make your current home your forever home or want to add value to your property for when it comes time to sell, we can enhance your lifestyle and boost the value of your home with a clever custom home extension.


Love your home but need a refresh?

Stay living where you love with room to grow.

  • Stay in the family home you know and love, where your most treasured memories were made
  • Avoid the hassle, disruption and cost of moving
  • Gain the added space you need and
  • Grow the value of your existing property
  • With our own Tradie team, we’re ready to build when you are.


You may find yourself needing more and more usable space or just space for leisure and privacy as your family grows.

Whether you need a second storey addition or want to expand your single-storey floor plan, our in-house design and planning team will create a harmonious and affordable home extension solution to suit your needs.




2 Bedroom   |   1 Bathroom   |   60m2

Comfortable Alfresco Living

The Tomaree Design from our Classic Collection is a beautiful, spacious, 2 bedroom design perfect for the visiting guests or those wanting to generate extra rental income with a holiday home. Boasting a functional layout with wide open plan living, dining and kitchen area, the jewel in the Tomaree designs crown is its expansive alfresco porch spanning the full width of the home. Perfect for entertaining guests or relaxing, the 60m2 floor plan of this stylish design offers ample space for comfortable living.

Granny Flat and Home Extension projects delivered on time and on budget, with no hidden fees.

Our experienced Home Extension and Granny Flat builders will make the entire consultation, design and building process smooth and stress-free. We’re here to guide you through every stage of your exciting new project and will ensure you get the keys to your new Granny Flat or extension right on time and on budget.



Visit Our Display Centres

Cubitt's Display Centre
and Head Office

152 Russell Street,
Emu Plains NSW 2750

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

Cubitt's Display Centre

124-126 Maitland Road,
Mayfield NSW 2304

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

Cubitt's Display Centre

80-82 Kembla Street,
Fyshwick ACT 2609

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

Cubitt's Display Centre

244 Shellharbour Road,
Barrack Heights NSW 2528

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

No Need to Compromise On Style

Play Video

Keeping the
Grandparents Close

Hear from Heidi from Mittagong in the Southern Highlands. For Heidi’s family, it was all about a beautiful Granny Flat which kept her parents close by, whilst harmonising with the gardens and her existing home

View Completed Projects

With over 28 years of experience, and 4,500 + new builds and extensions completed since 1994


Frequently Asked Questions

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.

Free In-Home Consultation Form

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