Reliable Builder for Home Extensions

Need more space, but love your existing home?

As your family grows up, you may find yourself needing more and more usable space. A well-planned home extension lets you stay in the family home you know and love, where your most treasured memories have been made, all while achieving the added space you need and increasing the value of your property.

Whether you want a ground floor addition or a second storey extension Our specialist design and construction experts are happy to help you maximise the use of space and plan the perfect home extension project for your needs. Your vision is our priority. For a stress-free and transparent design and building consultation, call us on 1300 721 150.

House Extensions to Add An Extra Level of Comfort

Extend up or extend out? Planning a house extension depends on all sorts of things, but most of all it should reflect your vision for how you'll use the new space. A Cubitt's Design Consultant will help you discover the exciting possibilities for your home, in a free Site Assessment where you can learn more about what could work for your property in your council area. Home extensions are at the foundation of Cubitt's 30 years of experience of building in NSW and the ACT. We can help you with a rear house extension, a side house extension, a front house extension and of course we are the experts at second storey additions. Explore a dozen house extension floor plans and ideas below and give us a call when you're ready on 1300 721 150 or email to get started.

Ground Floor Extensions

A ground floor extension is a fantastic option to add an extra level of comfort when you extend your home. There are so many ways to “build out” your house, with house extensions possible to the rear, the front, or any side where there is land to spare. Explore our floor plans offer a variety of front, rear and side house extensions and get in contact for something customised to the vision you have for your property.

Second Storey Additions

Today's lifestyles call for multiple living - and work areas in the home, and being able to 'retreat upstairs' is a gift your home could give. The possibilities are endless when you build a second storey addition, from peaceful bedroom areas, exclusive parent or teen retreats or even separate apartment style accommodation for aging parents. Explore floor plans for second storey addition ideas.


Recent Projects

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Talk to us about your Home Extension today

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

2023 Home Extensions Guide Download Form


Top Reasons Why Home Extensions Create a Better Family Future


Moving house is a pain
Buying and selling a house, negotiating, arranging all the paperwork required and physically moving location is an overwhelming and expensive process. Let us carry the load for you and transform your space into your dream home instead.


Don’t change address or schools!
Building a home extension means no need to make new friends, buy whole sets of new uniforms or forever be updating your address. Live where you love and stay connected to your community.


Stay where your memories were made – with added space!
Be together with the space to grow in an updated version of your beloved family home.


Financial freedom
Home Extensions are an investment towards increasing the value of your existing property, that avoids navigating the rocky conditions of the Australian housing market. Have the home you want, with a mortgage that allows you the freedom to live.


Transformation for comfort

At Cubitt’s, our designs reflect your style decision and comfort levels. No out-of-the-box solutions will be offered to you. Our designers start your design from scratch with your existing house plans as a baseplate.


Colorbond Steel

Looking for some inspiration for your Home Extension? Check out the latest guide from Colorbond

The colours you choose for your home help define its personality and reflect your family. A new roof or exterior as part of your home extension is the perfect opportunity to revitalise your home’s look or create an entirely new one. Cubitt’s work with well-known suppliers including Colorbond to help you redefine your new space. Be inspired by the thoughtfully curated palette of 22 colours in the Colorbond Home Additions brochure.


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Have It All – The Home You Want, With a Mortgage You Can Afford

Modifying existing homes is the foundation upon which Cubitt’s was built. Our team have completed more than 300 home extensions and additions across Sydney, Newcastle, Wollongong and surrounding areas. We build home extensions in the ACT and NSW, specialising in the Southern Highlands and South Coast, Newcastle, Central Coast and the Hunter. We have the design experience and the expert tradies who will make it happen for you available in-house for a smooth and stress-free home extension experience. This is real! The home you want can be yours.

At Cubitt’s, we handle every aspect of home extensions in-house – that means we’re your one-stop-shop for a stress-free renovation.

We’re committed to providing a seamless, streamlined experience throughout the design, planning and building process. Our experienced council planning and drafting teams understand the complexities of building with councils throughout NSW and the ACT and can handle all approvals and planning for you, plus you’ll have your own dedicated site supervisor, to keep you informed and updated every step of the way.

Call us on 1300 721 150 to begin your dream Home Extension.

Why invest in a home extension?

Your dream home may be the one you’re already living in – you just need to make it a reality! For many homeowners, the big question is to move or extend? Maybe you need a new bedroom or two for your growing family or simply want to enhance your lifestyle with a new entertaining space. From first floor home additions that maximise your current footprint to home extensions that utilise spare land on your property, home extensions and additions can add value and enhance your lifestyle with ease. Whatever the reason for needing more space, there are many benefits to extending your home rather than packing up and moving. 


The home you want, a mortgage you can afford

Avoid the tribulations of the Australian property market and invest in the home you already love. By investing in a home extension, you can hold onto your current mortgage while growing the value of your home with no need to go through the rigmarole of obtaining a new mortgage. A mortgage you can afford and living in your dream home are both within reach when you extend your home with Cubitt’s.


Stay connected to your community

Building a community takes years' worth of time and energy – from the little things like finding a hairdresser you love to the big things like settling your kids into a school and helping them make friends. When you invest in a home extension you can stay connected to your community and avoid the need to switch schools, find a new doctor, connect with new neighbours and all those other large and small challenges that come with moving.


Add value to your home and your lifestyle

A home extension won’t just improve your lifestyle, it will also increase the value of your home, leaving you in a more secure financial position. For the price you might pay in stamp duty for a new home, you can add tens or hundreds of thousands in value to your property. Turn your house into your dream home and feel secure in the knowledge you’ve helped to secure your financial future when it eventually comes time to downsize, sell or pass your property onto your children.


Have the lifestyle you deserve

You’ve worked hard, now it’s time to enjoy the lifestyle you want! Whether you’re adding new bedrooms and additional living spaces for your growing family, accessing new views and greater flexibility with a first floor home addition or giving your home a long-awaited cosmetic refresh, you deserve to live in the home of your dreams. Our expert team can make it happen, creating a custom home extension that meets your needs and your budget.


Stay where your memories were made

It’s natural to form a deep attachment to your home – after all, it’s where you’ve spent some of the best moments of your life, built a family, celebrated and created countless precious memories. When a time comes where your home is no longer big enough for your family it can be heartbreaking to think of leaving – which is why so many of us choose home extensions over moving. With Cubitt's, you can stay where your memories were made and create new ones in enhanced comfort, space and style.


Make it your own

A custom home extension is your chance to stamp your personal style on your home. Whether you’re living in an outdated old property or a newer house that simply doesn’t reflect your personality, a home extension is a chance to mould your house into somewhere that truly feels like home. When you extend with Cubitt’s, you can work with your design consultant to choose your finishes, styles, colours and the overall feel of your home renovation to create a space that’s all your own.


Make a wise investment

A custom home addition from Cubitt’s costs only a small fraction of the price of a new home, making it a much more cost-effective way of obtaining your dream home. Plus, none of your investment will be lost to administrative costs like stamp study as they would be if you purchased a new home – in fact, our home extensions often cost roughly the same amount as the stamp duty on a new property! Get more value from your investment and get exactly what you want out of a new home with a home extension.


Avoid the stress of moving

No need to pack your life into boxes, no need to leave your beloved community behind, no need to change your address, you can stay exactly where you are and still have the brand new home you want. Moving is known to be one of the most difficult and stressful experiences we go through in life. When you opt for a home extension instead of moving house, you save yourself the endless paperwork, packing and unpacking that comes with a move.


Reduce ongoing maintenance costs

Older homes always have something that needs fixing, whether it’s a leaky roof, peeling paint, rotting walls or again timber. A home extension is an opportunity to sweep away all the crumbling, ageing aspects of your property and replace them with fresh, strong, quality renovations that will last for years to come and save you time, money and energy on future repairs. Plus, a renovation won’t just remove the need for repairs, it will also improve the value of your property and enhance the look and feel of your home. 

Build your dream home extension with Cubitt’s - the home additions experts

At Cubitt’s, we’ve spent nearly three decades helping Australians build their forever homes. When you’ve found a place you love and are ready to put down roots, we’re here to make your home exactly right for you and your family. Whether you need an extra floor with rooms for your growing family or want to expand your living and entertaining area with a luxurious ground floor extension, we’re here to help. Let us make your vision a reality.

As an Australian family-owned business we pride ourselves on exceptional quality, attention to detail and top-shelf customer care. Get in touch today to learn more about home extensions with Cubitt’s – we’d love to hear about your project!


Trusted in-house designers and builders


All DA and council approvals


28+ years of experience


Full-service home extensions


Dedicated design consultants


Proudly Australian, owned and operated


Our Easy 8 Step Home Extension Process

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Fast, hassle-free extensions with experienced Sydney renovation builders

One of the hardest things about planning a home extension in Sydney is the time spent sourcing builders, designers and contractors and waiting for quotes to come back. With Cubitt’s, we’ll shoulder that burden for you. Working with Cubitt’s is as simple as telling us exactly what you want and leaving it up to our in-house team of designers, builders and trusted contractors to make it happen. We have dedicated in-house staff who can prepare your estimate in a matter of days, rather than a matter of weeks, so we can get the green light on your project, fast.

Discover More Value with Cubitt's


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



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