Granny flats have come a long way from simply housing grannies. Now available as multiple bedroom granny flats or two-storey granny flats, granny flat designs are small units either attached or separated from a single main dwelling on the same block of land. Granny flats feature the same quality construction that you should expect in an average-sized home and can be as packed out with features or as minimal as required to suit your unique needs. 

Granny flats offer the perfect solution for a range of situations, from housing elderly or disabled family members or providing a teenage retreat, home office solution or pool house. Granny flats are becoming more and more common as the housing market heats up, making independence more affordable for many different demographics. 

A granny flat is self-contained and can host an extensive range of features including a full-sized kitchen, bathrooms and multiple levels. Stylish granny flats are popping up in the backyards and properties of homeowners all across Australia. 

With the granny flat specialists at A-Class Building and Construction, your dream granny flat is more achievable than you may think. 

The Benefits of Granny Flats

Granny flat development has come leaps and bounds over the years, and there are now many more benefits to living in a granny flat than providing a simple roof over the head of a loved one. 

Building a granny flat has many obvious benefits, and some that you may not have considered, including:

Complete customisation

Granny flat designs are capable of including many unique features and inclusions in order to ensure clever use of every square inch of space. World-class, modern amenities along with smart style and design bring a modern difference to granny flats to make them the perfect home extensions.

We are proud to offer full customisation of our granny flats to ensure that your project is completed to perfection.


For those looking to reduce their carbon footprint, building a granny flat is a wonderful solution thanks to its smaller size and a reduction of overall energy consumption. Building from scratch enables you to make eco-conscious decisions for appliances and inclusions, lowering cost and output overall.

Make the most of your backyard

With a granny flat, suddenly the empty space that you need to weed and mow every week has a purpose that will not only bring lifestyle benefits but financial ones. Whether your home is an investment property or you're simply looking for extra room, a granny flat can bring financial value and other benefits to an otherwise useless space.

The option to build small and tall with a granny flat means that your yard can still be used for gardening and parties, serving two benefits. 

Build your dream home for less

The beauty of building a granny flat is that you can have the same quality work in the final product that you should expect in your dream home. Building a typical sized home from scratch can be incredibly expensive and take a long time to complete. Enjoy the luxury of personalised customisation right down to the wall colour and finishings with our granny flat specialists.

Why Work with an A-Class Granny Flat Builder

We have been building for over 45 years of combined experience within the Wollongong region with a passion to create the highest quality results for each and every client. We provide accurate estimates and a guarantee of quality workmanship, delivered right on time. 

Some of the perks you can expect when choosing A-Class builders in Wollongong for your granny flat include: 

  • We involve our client throughout the whole process from design to construction;
  • We can offer knowledge and advice on the design and construction of your granny flat to meet all relevant standards;
  • We have an excellent track record of happy and satisfied clients who are the proud owners of a new home or granny flat; and
  • We offer a wide variety of designs

At A-Class Building & Construction we don’t believe in a one-size-fits-all solution, especially when it comes to building granny flats. We understand that every family is different and so are the needs of your granny flat. Your site, budgets, preferences and individual requirements will be different from other clients - this is why our aim is to deliver customised building services that will meet your needs.

The Granny Flat Building Experience

Whether you're simply looking for extra space for family or creating a home office project, it can be helpful to know the details before undertaking your granny flat build. 

The general steps we will take to create your granny flat include:

  1. Design and approval process

From our initial meeting, we will create your dream granny flat design depending on what you want to accomplish, what we can build in your space and how much you can spend from your budget. From here we submit a development application and relevant paperwork to get all approvals ASAP. Once we receive relevant approvals, we will schedule the build process and order your chosen materials, securing everything we need to avoid hiccups along the way.

  1. Prepare the property

We will prepare the site for the build by clearing any debris and obstacles while ensuring there's enough space for our materials and tools to not impact your day to day life. Your neighbours will need to be informed that our team will be working on your site as per council regulations.

  1. Slab and foundations

This is the stage where you can start seeing your granny flat come to life with the slab and framework showing you exactly where your granny flat will stand. You can now start imagining how you will make the most of your remaining yard and the space around your granny flat.

  1. Frame

We use the strongest timber or steel to set out your internal and external bearings. With the approval of your site supervisor or project manager, you may be able to walk around your new granny flat and see exactly where each bedroom and window will be. From here, you can make furnishing and decoration decisions based on details such as the best sunlight and airflow in your new granny flat.

  1. Lock up

The lock-up phase involves closing the granny flat completely, including the doors, windows, roof and guttering. From here we can lay the external brickwork or colourbond and you can step back and marvel at the stunning facade of your new granny flat.

  1. Interior details

As everything is now lockable and weatherproof, we will work on the interior fixtures such as your electrics, plumbing, insulation and plasterboard. From here we can begin your kitchen install including cabinets, appliances and your oven.

  1. Flooring and style

This is where your granny flat starts to look like a real home, matching the interior with your main home style and exterior features, or having it stand out as its very own style. We will install the final tiling, shower screens, paint and accessories including both creature comforts and essentials.

  1. Handover

And just like that, it's time to receive your keys and enjoy your new granny flat. We will do one last inspection to ensure everything is exceeding code and functioning perfectly while making sure the quality workmanship we are known for is intact. After a good clean and check, your granny flat is all yours to enjoy.

Build Your Dream Granny Flat Today with Our Granny Flat Specialists

Show your loved ones how much you care for them and increase the value of your property by considering a granny flat build on your property. We have an extensive range of multiple bedroom granny flats, single bedroom granny flats or simple studios to inspire you, and with our experienced team - you can select the best for your property, budget and needs.

A Class Building & Construction can help you to design and create an affordable housing solution.

To discuss our granny flats or to book us in for your new home build - contact us today.

Contact A Class for a Granny Flat Quote Today!

Frequently Asked Questions

Please click on each question for more information!

How much does it cost to build granny flats in NSW?

Granny flats can add thousands to the value of your land and house for a potentially lower cost than you think. A granny flat build can cost anywhere from $100,000 and will depend on if you have multiple bedroom granny flats, a single bedroom granny flat or a simple studio.

Our team can work with your budget and give you a clear indication of the price here.

Can I build a granny flat on my property NSW?

There are a few regulations around building a granny flat, but it is a fairly simple process in NSW. If you meet the minimum space requirements and have a suitable main dwelling, you shouldn't run into any issues.

Do I need council approval for granny flats in NSW?

At this stage, there is no council approval needed for building a granny flat in NSW if your property meets the requirements.

What is the maximum size for granny flats in NSW?

The maximum size for a granny flat ranges from 50 to 100 square metres depending on your local council.



what our customers say about us


Scott & Rob Set the Bar as Builders

We engaged Aclass Building to build our three bedroom one garage extension to our house in Bulli NSW. We found Scott, Rob and the team to be professional, flexible and hands-on in their approach to the project. Their communication with us throughout the build was excellent as was their workmanship. We are very happy to recommend the guys from Aclass Building and would certainly use their services again.

Rod & Nell Pratt

Well Above Our Expectations!

5 stars are not enough. We now have a beautiful new bathroom and an extra bedroom, without undertaking extension work. Thank you for capturing our vision on a very friendly budget. I am always wary of tradies; they tend to over promise, under deliver, under estimate costs and stuff you around with schedules.

Johnathan & Nicola Papandrea

Highly Recommended!

We had a renovation on our property completed by A Class which was simply fantastic. We are very appreciative of the time Rob and Scott spent with us to make the process as easy as possible. All of the trades they employed were excellent and the finished product is amazing. I would highly recommend A Class to anyone and would use them again in the future. Thanks!

Sara Lundberg

Professional Job!

Contacted Rob & Scott to complete an internal fit out of a newly completed warehouse, the boys professional approach and finished product was excellent, there team of trades were professional I would recommend A Class Building & Construction great work boys.

Tony Economos

Quality Work!

A Class recently completed a bathroom renovation for me. Clearly explained, regular updates, cleaned up after themselves and great work. I have no hesitation recommending them and will certainly be using them for all future work.

Mike Starr – Owner Swell Coffee

Excellent Worth Ethic!

A Class have recently completed the repairs to my decking upstairs and I couldn’t be happier. The professionalism, friendliness and workmanship is top class. The respect and the work ethic of all, including the apprentice was heart-warming. I would highly recommend A Class Building!

Carole Hilton

Pleasure to Work With!

Scott, Rob & the AClass building team were an absolute pleasure to work with. We came to them with short notice to get them to do a fairly big renovation project on our 40 year old home, so that it would be ready in time for Christmas. We picked them as their quote was reasonable, they were very friendly and they were confident they could get the job done within our timeframe. Overall we were very impressed with how fast everything was completed to an excellent standard and what an easy process it turned out to be for us. We are now settled into our newly renovated home and love everything about it. We're looking forward to working with them again in the future and will recommend them to everyone we know.


Exactly What We Wanted!

We undertook an extensive reno & wanted someone to come in & get everything done with no hassle. A Class provided us with exactly what we wanted. All the tradesmen were fantastic, friendly and nothing was a problem. They kept in regular contact with us regarding progress and any issues were brought to our attention immediately. The whole process from start to finish was excellent, would highly recommend these guys to anyone!

Jane Gow

I’m Really Happy With the Result

I used A-Class Building for a large renovation on a family home. I had never built or renovated before so was really unsure of how the process worked so I needed a builder that understood my situation. Scott and Rob helped with advice right from the start of the DA process, through to completing extra jobs, like installing curtain rails, at the very end. The quote price was competitive and the changes I requested to the scope of work were clearly communicated and signed off on. Their project management skills were fantastic, co-ordinating all the trades and minimising the time that I was required to attend the building site, in most cases I was able to answer questions and clarify requests over the phone.

Vicky Collins

I Wouldn't Hesitate to Recommend AClass

I recently used Scott & Rob from A-Class Building to undertake a renovation and fire rating of an existing duplex for a strata subdivision. A project which presented a number of challenges. I had 3 building companies quote on the job and I found that the other builders were more focused on the 'problems' with the job, whereas Scott was more focused on the solutions to the challenges. This made me feel at ease and confident in the abilities of A-Class.

Anna Porter

Thank You for the Fantastic Job!

We are extremely thankful to AClass for such a great job they did with our renovation. It has allowed us the opportunity to have such a beautiful new open plan living space which we thoroughly enjoy. We have started to recommend AClass Building to all our friends who are embarking on the journey of renovating and would not hesitate ourselves in using their building services again in the future. Matthew and I have no hesitation to be advocates for the team at AClass and would absolutely be open to discussing with anyone who wants to learn more about our experience with them.

Maree and Matthew Becker

We Were Very Pleased!

We were very pleased with the way Scott, Rob and the team attended to our small renovation jobs. They were happy to travel to Scarborough and did the work very promptly. They also cleared all rubbish and disposed of it leaving our house and yard very tidy. We would have no hesitation recommending them.

Linda and Denis

Professional Workmanship!

We used Aclass Building for a deck at our preschool. The families are so pleased with our new deck and the extra play space it provides. Aclass were very helpful in completing the necessary paperwork required for Wollongong City Council. The deck was completed to a very high standard and would not hesitate in recommending their professional workmanship.

Linda - Peter Pan Preschool Mangerton

A Class Were Professional & Courteous

We engaged Scott and A Class Building & Construction to complete a double garage, deck and retaining walls. After contacting many builders we found that most would come and see our site (very sloped) and not provide a quote. Scott was helpful from the outset providing us with contacts for a draftsperson and engineer required to be engaged prior to quotes being able to be calculated. Scott was confident in what he said and always answered any questions in a timely manner. We would (and have) recommend Scott and A Class Building & Construction to anyone planning to complete a renovation, large or small.

Kyle Kalsow & Tomeka Partridge

Polite & Friendly!

Aclass builders did a complete renovation of my house - cladding, new roof, insulation, solar panels, water tanks tiled floors and new inside walls, ceilings including painting, ceiling fans and all new electrical and a new bathroom. When I chose them I stipulated that I wanted it all done at once, not taking months and months. Aclass and their subcontractors did an excellent job. Everything I asked PLUS they made some suggestions to changes in the plan which saved me money and ended with a better outcome. They accommodated my changes during the process cheerfully and with not a great cost increase on the original quote.

Margaret Perrott

Thank you Rob and Scott!

A Class building and construction recently completed a second level (2 bed, 1 bath and stairwell) to our home. As well as rendering our existing dwelling and adding a colourbond roof, gutters and down pipes. To say Rob and Scott were professionals is an understatement. I gave them a quick turn around dead line of my second child's due date. They beat this by several weeks. No matter what time I called with whatever little question I had to ask it was answered promptly. If the phone went to message bank you can be sure I was called back within the hour even outside working hours. I couldn't be more happy with the result. Thank you Rob and Scott

Shaun and Helenka Curran

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