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Get a Quote in under a minute

No need to wait days thanks to this easy tool which will give you a price in under a minute!

Receive a Granny Flat Guide/Information Pack with every Quote

Where Quality meets

Intelligent Design - Quality Finishes - Affordable Prices
Money Back Guarantee
If building approval can’t be obtained for your granny flat, Smart Choice Granny Flats will give you your money back. No need to take unnecessary risk.
16 Week Build Time Guarantee
We can guarantee your granny flat will be built in 16 weeks. If we don’t complete on time and there are no extensions of time, we will reimburse you.
Fixed Price Guarantee
We guarantee transparent, fixed pricing. No hidden costs! If any changes are required to the granny flat scope of works, we can provide you with no obligation pricing, with freedom to source your own tradesman for additional works.
Design Satisfaction Guarantee
We guarantee that you will love our granny flat design.
Premium Quality Guarantee
We guarantee that you will love your high quality granny flat.

The Smart Choice Difference

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The contemporary granny flat designs you’ll find at Smart Choice Granny Flats encompass the same comforts as a regular home, just in a smaller and cosier package. So if you’re looking to build a granny flat, then make sure you partner with our expert Sydney granny flat builders at Smart Choice Granny Flats. We have 35 years of experience in the building and construction industry and have completed hundreds of granny flats over the years — we would love nothing more than to help you construct yours.

Reasons to consider building a granny flat in Sydney

There are plenty of great reasons for you to consider building a granny flat on your property. Some of the advantages and benefits why you could consider building a granny flat include:

  • Keeping your family close

Compact yet comfortable, a granny flat often makes for a viable living option for relatives and in-laws if you want to keep your family close but not under the same roof. Whether you want to provide a comfortable place for your parents to retire or want to give your growing kids a sense of independence while still having them near you, a granny flat is a great choice.

  • Stylish guest house

If you often have friends and relatives visit, a granny flat can offer them a place to stay. Instead of booking an expensive hotel, your guests can simply make themselves at home in your granny flat for the duration of their stay.

  • Additional income stream

Renting out your granny flat is a great way to facilitate an extra income stream. At Smart Choice Granny Flats, we have a range of contemporary granny flat plans that are perfect for attracting potential tenants.

icon 1 removebg previewOver 35 Years of Building Experience

Since 2012 our team have built over 500 Granny Flats. We have spent the last 8 years perfecting our passion.

icon 2 removebg previewHousing Industry Association Contracts

We hold strong values and respect the trust you invest in us, that is why we only use Housing Industry Association Contracts which are designed to protect your interests, offering peace of mind.

icon 3 removebg previewPremium Rent & Resale Value

It is not hard to build a Granny Flat. But it is imperative the design and inclusion are to the right level to get the most from your investment. We can save/make you hundreds of thousands of dollars by offering you the right guidance.

icon 4 removebg previewTransparent Pricing

We provide Transparent Pricing, we are one of very few Builders who actually provide itemised pricing on each selection you make giving you full transparency and the ability to customise your quote and design to suit your needs and budget.

icon 5 1Fast Design & Approval In House

We can get Design and Approval on your Granny Flat done in as little as 3 weeks if your property qualifies with the CDC Approval requirements.

icon 6 removebg previewAustralian Owned Family Business

We treat you like a friend, we listen to your needs and work hard to make sure they are met. Your satisfaction is our highest priority.

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Contemporary granny flat designs to suit the Australian lifestyle

At Smart Choice Granny Flats, we believe that the modern granny flat should look and feel like a home. Our designs are aesthetically pleasing inside and out, reflecting modern design trends and architectural styles. Even if you are choosing to build a granny flat as an extra guest house and know that it will not become someone’s long-term home, we ensure that every single project we complete is executed to the highest standards of quality. This is why we have a reputation as the expert granny flat builders you can trust.

Select one of our granny flat designs or customise your own

While we are proud to offer a versatile range of granny flat designs, from studios to four-bedroom plans, we also understand that everyone’s needs and requirements are different. Depending on the granny flat’s purpose, the size of the land and your location, you may want to look at different options that go beyond our available catalogue of granny flat designs. If that’s the case, then we would be more than happy to work with you on designing your very own unique, tailor-made granny flat.

On the other hand, if you’re not too sure where to start when it comes to designing your own granny flat, feel free to choose one of our existing designs from our collection. Each of these pre-existing designs can be customised too, and you can personalise details — such as the fittings, tiles, and the outer facade — that are more suited to your personal preference.

Deciding on the size of your granny flat.

How big can a granny flat be? Every state in Australia has different laws when it comes to the size of granny flats. If you’re considering building a cheap granny flat with Smart Choice Granny Flats, make sure you check your state laws and local council regulations first.

The cost to build a granny flat

How much does a granny flat cost? This is a very important and valid question, but there are many different things to take into consideration when working out the cost of building a granny flat. The state of your property’s land, the size of the granny flat and whether or not you want a custom design are all factors you need to consider when it comes to the cost of your granny flat. To get a quote with Smart Choice Granny Flats builders, fill out the form at the top of this page.

Take a look at a Smart Choice granny flat in person

Did you know that Smart Choice Granny Flats offers open home inspections? That’s right — if you’re thinking about investing in a granny flat, you can get in touch with us to book an open home inspection and see our craftsmanship for yourself. Visiting an open home granny flat inspection will give you a better idea of what a contemporary granny flat could look like on your property and may even give you ideas on how you would like to design and customise your own Smart Choice granny flat.

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Smart Choice Granny Flats specialises in Designing Custom Granny Flats to suit your unique property, such as:

  • Steep Sloping Blocks
  • 60sqm Granny Flats plus an extra 35m2 Studio next to it
  • Granny flats with Garages and large Alfresco Area’s
  • Double Storey Granny Flats
  • Garage Conversions
  • Triangular Shaped Granny Flats.

However we have a diverse range of Pre Designed Granny Flats to browse through.

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We could tell you all the reasons why the craftsmanship of our Granny Flats is second to none. But don’t take our word for it, come see it for yourself.

Enquire with us to arrange a time that suit you to have a Private Inspection or Open Home Group Inspection

We will provide you with the address’s of the current Open Home/s and meet you there.



We have built our Showroom with our Selection Centre, Display Granny Flat, Head Office and even a Large Double Storey Display Home all under one roof.

Showcasing the quality of our standard finishes and also the high end finishes available for those who demand it, so you can see and touch all the options that are available.


The Selections Centre range was designed to cater for New Homes as well as Granny Flats. You will have an abundance of options, and will be sure to find all the comforts and luxuries to make a beautiful mini home.

What Our Customers Say

“We have had a very good customer experience with Smart Choice Granny flat from project initiation through to completion. Our lovely granny flat was completed within 3 months without any hiccups and the responsiveness and professionalism from all staff members including our contractor for Landscaping have been just incredible and we are really happy with the workmanship as well as the follow up maintenance work provided. We have no hesitation in recommending Smart Choice Granny Flat to anyone who values a team of honest and transparent professionals who is able to deliver on-time and meeting customer budget. Congratulations to the team for their great achievement!”

Gabriela Louie

“Smart Choice Granny Flats delivered us a beautiful 2 storey granny flat. I knew nothing about granny flats when I first spoke to Faraj at Smart Choice Granny Falts. He helped me through the whole design process suggesting what was best for our site. We then had the fantastic builder Stuart Ferguson who made sure everything went to plan. At all times through the process the office staff, especially Chris and Suzanne were prompt and courteous replying to my questions. The end result is outstanding and complements the space available. Being two storeys it means the tenants have much more land available for their BBQ and outdoor furniture. The tenant moved in the day after the occupancy certificate was issued paying $650 per week. Even the real state agent wanted to move into the stunning Granny Flat created and built by Smart Choice Granny Flats. I would definitely use Smart Choice Granny Flats again.”


“I had a great experience having Smart Choice Granny Flats built my granny flat, BEST granny flat building company, 10/10!!!”

Wen Yu Chien

“I consulted with the manager about building a granny flat. He was a very honest man who had been very careful to check my contract and site plans. He was a man who could be trusted by anyone. I strongly recommend.”

Joseph Mock

“Nana’s little cottage is all finished thanks to Smart Choice Granny Flats. We could not be happier”

Tarcey Serenity