Granny flats Central Coast

Backyard Grannys are the leading granny flat builders on the Central Coast.

Keen to optimise your backyard space with a unique granny flat build? Whether you’re after a savvy investment option to potentially increase the value of your property, or a retreat for loved ones, or even an extra space for a home office, Backyard Grannys has a contemporary solution to fit your requirements.

As a specialist builder who has focused solely on building granny flats for over 15 years, we are committed to ensuring exceptional service and workmanship for excellent customer experiences and return on investment. Have complete peace of mind knowing your granny flat will be built on time, to the highest standard, and within your budget.

We’ve built many granny flats across the Central Coast, including in Gosford, Wyong, Tuggerah, The Entrance, and Norah Head. Our projects have included a wide range of designs, from custom pool house designs to investment properties and holiday rentals.

Building a granny flat on the Central Coast

There are some unique challenges and opportunities when building a granny flat on the Central Coast. We often encounter sloping and uneven sites that require complex site or design modifications, requiring specialist experience and knowledge of the granny flat construction process.

We also find that Central Coast properties are more frequently in a high flood or high fire rating zone. This can increase the reporting and costs or even make projects non-viable so be sure to find out the relevant zonings for your Central Coast Granny Flat.

Our in-house design team can help and take care of the entire approvals process for you, from initial concept to design to engineering and council approvals. We can modify any of our designs to fit your existing house and unique site requirements, while still accommodating your design needs.

We're an award-winning Central Coast granny flat builder.

See our awards

Popular Central Coast granny flat designs

After years of building granny flats, we know what our clients want for their backyards. One of the popular trends we have seen in recent years is the addition of a skillion roof line, providing extra height on the inside – it’s a great choice to make a granny flat feel more open. When combined with large or highlight windows and raked ceilings, a skillion roof becomes the ultimate design statement!

Given the unique challenges of the properties on the Central Coast, we often build custom-designed granny flats for our clients. Check out our gallery of floorplans and be sure to ask us about our custom design process.

We build affordable granny flats across the Central Coast

Download our full range of granny flat designs and floor plans

Full range of granny flat designs
Detailed floor plans of 1, 2 and 3 bedroom granny flats
Floor plan dimensions and measurements
Complete guide to design details
Facade options

Testimonials

"A big thank you to Backyard Grannys for my new abode. I found BYG on the internet and I can thoroughly recommend them to do the build. From the very beginning BYG have been very professional, easily contactable and easy to discuss the build with. The layout has taken everything into consideration that I will need now and into the future. Not to mention it has added considerable value to the property. A big shout out to Brett Tubnor, my project manager, who kept me updated and dealt with any questions I had in a timely and professional manner. Also to the staff in the office in particular Lynne, thank you. I have no hesitation in recommending BYG."

Victoria Driscoll

"Backyard Grannys were very professional, each step was explained clearly and all communication was easy to understand. Our site supervisor Brett was super organised, kept us informed of all progress and ensured all finishings were high quality. I would highly recommend Backyard Grannys."

Katherine Cody

"Backyard Grannys built our 2 bedroom Granny Flat, from the getgo we have had the BEST experience. They talked and walked us through the whole process and timings of when things would occur. We live 6 hours from where the building will be built, the communication was excellent and the upgrades we requested where done straight away, we made the colour selections over the internet which was just so easy, they called to confirm our selections and if there were any changes due to manufacturers issues they were onto us to let us know and a like for like products where used. The built was quicker than we expected and the handover occurred on the OCT long weekend, Graham walked us through the Granny and it is far better than we expected, the attention to detail and the quality is superb. Would I build with them again 110%. Do yourself a favour and check them out you will not be disappointed."

Craig Sharp

"We would like to say a very sincere thank you to all at Backyard Granny’s, we mean everyone starting with Alex Mitchell the Managing director of the company right through to the truck driver who cleans the yard. We were blessed to have found this wonderful company. From day one they made us feel so special and the advice, communication and support was beyond words. I have been involved in the building industry for over fifty years and have never found a company to go to such lengths to make sure we were kept up to date with every step of the build.The workmanship of the project from day one right through to the handover of the keys was beyond belief. It was easy to understand just how much Alex ( Managing Director) takes so much pride in his Backyard Granny’s Flats and how he has managed to make sure this flows so smoothly throughout his whole team which also includes his contractors. We also need to say a special thank not only to Alex but Aemelia McCorb Architectural Designer, Lynne Tarlinton, Lynne Smart Client Service Officer and Erin Murray Administrator. A special mention has to go to Graham Smith who was our Project Manager. Graham’s dedication and commitment to look after our build was outstanding and his commitment to make sure that every detail plus all communication was important to us as if he was building the flat for himself.Regards - Roy & Julie Leslie"

Julie Leslie

"We could not be happier with our new Granny flat. BG’s was so supportive and provided the very best service imaginable from the first visit to the display, to getting the keys. Our Project manager Graham Smith is irreplaceable and made everything easy and efficient. The team were always available to listen and provide guidance and support when needed. Lynne is just the best and kept us up to date along the way. We could not have asked for more and would recommend the company to anyone."

Sarah-Jane Daniel

"After a rocky start with sales staff we were appointed brett tubnor as project manager from that first call from brett my mind changed about backyard grannys we had the pleasure working with brett and all he’s trades we found him to be honest and if there was a problem he would ring i would recommend backyard grannys in the future."

Wayne Guthrie

"We just had our Granny Flat completed (Jan 2025) and myself and my wife are very pleased with the results. Backyard Grannys were flexible enough to incorporate a design which was generated by my wife utilising an off the shelf design/architecture computer program. Backyard Grannys then used this as the basis to complete an up to regulatory specification Granny flat design.Having heard so many horror stories of people having difficulties and severe disagreements with their builders, we found Backyard Grannys superior ethics and customer focused ethos to be a most unexpected pleasant surprise. We sincerely hope that Backyard Grannys never changes that aspect of your business, as in our case it has served you well, and gained you loyal and satisfied clients.The staff at Backyard Grannys are exceptional. From the sales and design team, to Backyard Grannys CEO Sarah Gow (who personally inspected each stage of the build) . Our site manager Aaron Mullins in particular was awesome. He took our calls no matter how busy he was and made himself available to address any questions, requests or concerns we may have had resolving all such queries promptly and to our satisfaction. A very client focused outfit.We would highly recommend Backyard Grannys to anyone. They were very responsive to requests and questions, and when we were told something, it was done without fail. Pretty great building experience overall. Dealing with Newcastle City Council......., well that's another story😆Pete and Michelle Evans21st of February 2025"

Peter Evans

"Thank you to Grant, Caroline & Michelle for taken the time and patience to go through the details of the granny flat, Helpful friendly staff.We have now started the process of building a GF April 2023 will update at a later time.......Update - Building start date September 2023Update - So far very happy with the service and build will add photos after completion.And thank you Brett my Project Manager.Awning was my little touch.Another update: December 2024 building still as new with no issues and have added some photo that some people may have like."

Andrew

"Great service at BYG right from the start. Josh was very thorough with his quote and also recommend Axon cladding which was slightly different to the original cladding I wanted but the Axon cladding really made the granny flat stand out! Aemelia was really great and meshing the whole design together!Highly recommend talking to Josh for any of your granny flat ideas!"

Shannon Allen

"The whole team at Backyard Granny’s have been fantastic to work with. The contractors were each different but carried on their work requirements quite professionally. While at first the process seemed a bit stressful for me, I have to say that I couldn’t have picked a better team than Backyard Grannys - everyone was so easy to work with and nothing was too much trouble, with special thanks to the project manager Riley. I also want to thank the office staff too, especially Lynne, who was the best person to help guide me whenever I needed to ask questions. Overall I’m extremely happy with the end result and could not recommend them highly enough."

Anne Mitchison

Investing in a Central Coast granny flat

Granny flats have become one of the top choices for property investors on the Central Coast for improving their properties. Smart investors like Tony from Killarney Vale are choosing Backyard Grannys to complete the construction of their granny flat as a portfolio booster, adding long-term capital, increasing property values and return on investment. A Central Coast granny flat is a smart investment, with construction costs relatively low in comparison to a traditional house and often without the added cost of additional land.

A granny flat will not only add value to your home but, with rents on the rise, Central Coast granny flats can often earn you additional income of more than $450 per week in extra rental income (depending on where you’re located and other factors), which can mean up to a 15% return on investment! Visit our investor information page to find out how and see what kind of return you can expect when you choose Backyard Grannys as your granny flat builder.

Visit a granny flat display home

Get a real sense of the space and size of a high-quality granny flat and explore the layout for yourself with a private display home tour. There’s no better way to see the quality of construction, range of finishes, and selections for yourself. Display home tours are open by appointment – find out more on our granny flat display home page.

Central Coast granny flats frequently asked questions

Having built over 1,000 granny flats for our friends and neighbours across the Central Coast area, we have learned the most common questions clients will ask regarding their projects. To address any potential concerns, we have provided this quick FAQ guide below. If there’s anything not answered here, please contact us and we will happily answer any other questions or concerns.