Business Details
17 Years
experience
Your Trusted Granny Flat Builders in Sydney
At Granny Flats Australia, we are dedicated to delivering high-quality, custom-designed granny flats that meet diverse needs, from family living spaces to investment properties. Our team prioritises transparency, flexibility, and direct communication, ensuring seamless project management from initial design to final construction. We maintain strong relationships with councils and private certifiers to guarantee compliance and accurate pricing, while our in-house construction crew ensures attention to detail and site safety. With over a decade of experience since 2009, we pride ourselves on handling every aspect of your project, including design customisation, council approvals, and construction, all backed by industry accreditations and comprehensive insurance coverage.Our display centre in Castle Hill showcases two popular 60m designs, allowing clients to explore materials, colours, and upgrade options. We offer over 50 floor plans, with guarantees on timely delivery and a 6-month construction timeline. Our repeat and referral business accounts for over 50% of annual builds, reflecting our commitment to client satisfaction and quality craftsmanship.
Services
Granny Flat Design
Granny Flat Construction
Custom Floor Plans
Display Home Consultations
Council Approval Assistance
Details
- Year established: 2009
Highlights and features
- We handle every aspect of your project from start to finish, including council approvals.
- Over 50% of our annual builds are repeat or referral projects.
- Explore two fully furnished display homes in Castle Hill to visualise your design.
- Guaranteed 6-month construction timeline for hassle-free delivery.
- Licensed builders with comprehensive insurance and industry accreditations.
Associations and certifications
- Housing Industry Association
- Department of Fair Trading
- QBE Insurance (Australia) Ltd
- MECON (Mechanical & Construction Insurance P/L)
- Hollard Insurance Company Limited
What people say
Smoothest project ever
Excellent service
Highly recommend
Quality construction
Professional team
Services
Granny Flat Design
Our granny flat design service offers over 50 floor plans, including 1, 2, and 3-bedroom layouts with optional garages, carports, and alfresco areas. Clients can customise designs to fit their block's dimensions and personal preferences, ensuring a tailored solution that maximises space and functionality. Our team provides 3D visualisations and material selection assistance to bring your vision to life.
Granny Flat Construction
We deliver end-to-end granny flat construction with a focus on quality materials, precision, and timely completion. Our in-house builders handle all aspects, from site preparation to final inspections, ensuring compliance with local regulations. Clients benefit from a 6-month guaranteed delivery timeline and a 10-year structural warranty for added peace of mind.
Custom Floor Plans
Our custom floor plan service allows clients to modify existing designs or create entirely new layouts to suit their property and lifestyle needs. Options include luxury inclusions, multi-functional spaces, and energy-efficient features. We work closely with clients to ensure each design balances aesthetics, practicality, and value.
Display Home Consultations
Visit our Castle Hill display centre to explore two fully furnished 60m granny flat models: the Banksia (standard inclusions) and the luxury Belmont. These displays showcase material options, colour schemes, and upgrade possibilities, helping clients make informed decisions. Our specialists provide on-site guidance to refine your design preferences.
Council Approval Assistance
We streamline the council approval process by managing all documentation, submissions, and compliance checks. Our team maintains strong relationships with local authorities to expedite approvals while ensuring adherence to zoning laws and building codes. This service eliminates the complexity of navigating regulatory requirements independently.
Questions
What is a granny flat?
A granny flat is a secondary dwelling on a residential property, designed for family members, rental income, or additional living space. It is self-contained with kitchen, bathroom, and living areas.
How long does construction take?
We guarantee completion within 6 months, from design finalisation to handover, ensuring a timely and efficient process.
Do you handle council approvals?
Yes, we manage all council documentation, submissions, and compliance checks to simplify the approval process for clients.
Can I customise my granny flat?
Yes, we offer over 50 floor plans and custom design options to suit your block's dimensions, lifestyle needs, and budget.
What areas do you service?
We operate across Sydney and surrounding regions, including Baulkham Hills, Liverpool, North Sydney, and Castle Hill.
What warranties are provided?
We offer a 10-year structural warranty and Home Owners Warranty Insurance through QBE Insurance (Australia) Ltd.
Videos
Reviews (4)
Aida Zaidan
Oct 28, 2021
Report
Granny Flat Australia recently built our mini home in Greystanes. We were blown away with their high standards from start to finish. Honest and professional. No hidden costs. Cid was a gentleman to deal with and Michael was equally very efficient and available to assist at every moment. I highly recommend them.
Rainier Regozo
Oct 17, 2021
Report
Review on Aftersales = 110/100 star :)
I felt so compelled to leave this second review with our experience post sales/build. We recently took on a different project for pergolas, but did not get the same level of service that Grannyflat AU provided us.
Grannyflat AU really up the bar when it came to service and that touch of kindness and level of social skills where other business lack so much of.
Michael has been absolute amazing at this, (a second mention) always a pleasure to have that chat and he was welcoming to address questions i had even post the GF build. Not sure if they have more
I felt so compelled to leave this second review with our experience post sales/build. We recently took on a different project for pergolas, but did not get the same level of service that Grannyflat AU provided us.
Grannyflat AU really up the bar when it came to service and that touch of kindness and level of social skills where other business lack so much of.
Michael has been absolute amazing at this, (a second mention) always a pleasure to have that chat and he was welcoming to address questions i had even post the GF build. Not sure if they have more
Rb
Sep 23, 2021
Report
Service exceeded our expectations! Literally, what a company! Complementing them would never be enough! From the first call and dealing with the team at each step of the way, we were utterly impressed with Grannyflatsaustralia. The highly efficient and skilled team let by the Maestro "Cid", were flawless in their work ethics and went beyond what was required to execute and provide a meticulous design, work and finished product. My wife and myself cannot thank them enough, in particular to Cid who made sure we were taken care off at every stage, his generosity, transparency and commitment were second
Steve De
Aug 09, 2021
Report
Thank you GFA for our amazing mini home. We have been living here for the last 4 months and we are so happy with everything. Michael did an amazing job of making sure everything was perfect. These guys definitely know their job and they will go the extra mile. DO NOT let anyone else build your granny flat because you will be disappointed. We almost made that mistake & then someone passed us on to these guys & now i look back and realise how lucky we were. Other companies offer nothing and the finishes are cheap as guts. The devil is in the detail! Thank you Cid, Rodrique, Chelsie, Michael & whole
