Castle Hill NSW
Showroom Open Weekdays 9am–4:30pm
Granny Flat Builders in Castle Hill and Across Sydney
Your dream granny flat is closer than you think. Get your keys in 6 months guaranteed, with a custom design, quality construction and a full end-to-end service from Sydney's original granny flat builder, established 2009.
Builder Licence No. 218844c
HIA Member
$10M Public Liability Insurance
Since 2009
GET YOUR FREE SITE PLAN & QUOTE
No obligation - No site inspection required
Sydney Granny Flat Specialists, Since 2009
Builder Licence No. 218844c
Quality Homes. Real People. Local Experts.
FREE, Obligation-Free
Quote and Site Plan
Here's what you'll receive:
FREE SITE PLAN
See where a granny flat could potentially sit on your property.
FREE PROPERTY REPORT
We assess lot dimensions. access, setbacks, services, trees, slope and more.
FREE QUOTE
Get an initial price based on your property and preferred granny fiat.
Is Your Backyard Suitable
for a Granny Flat?
You may have more potential sitting
in your backyard than you realise.
Send us your address.
We'll do the homework.
Who Builds a Granny Flat?
Newlyweds
Struggling to buy a new home
Elderly Parents
You want to keep close by
Single Parents
Needing an affordable, low-maintenance solution
Teenagers
Who want to move out but stay close
Property Investors
looking for more return on their investment property
Families
Who need more space around the house
Business Owners
Who want to work from home and keep costs down
What's Possible
on Your Property?
Over 50 Floor Plans, or Fully
Customised to Your Block
Choose from 50+ floor plans - or customise your own.
1 Bed
2 Bed
3 BED
Garage
ALFRESCO
CUSTOM
THE OLIVIA
1 BED | 50m²
THE SOUTHEE
2 BED | 72m²
THE WILSON
2 BED | 75m²
THE BELMONT PLUS
3 BED | 90m²
50+
DESIGNS
Modern. Flexible.
Designed for real life.
A Granny Flat That Feels Like a Home.
Why Choose Us
-
Australia's Original Granny Flat Builder, Since 2009
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We Are the Builder, Nothing Outsourced
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Builder Licence No. 218844c
-
HIA Member
-
Fully Insured (Home Owners Warranty, $10M Public Liability, Construction Risk)
-
Over 50% of Builds Are Repeat or Referral
We Handle Every Step,
Start to Finish
It's easier than you think.
Assessment & Proposal
We assess your block and put together a proposal tailored to your site
Design & Approval
Your granny flat is designed to suit your block and lifestyle, and we manage council or private certifier approval
Construction
Built on a solid concrete slab, fully insulated, all services connected, so you can simply move in
Don't Take Our Word for It.
REAL CLIENTS. REAL PROJECTS. REAL GRANNY FLATS.
Everything flowed beautifully from the first visit to the showroom where I was given undivided attention... At no time did I feel pressured to sign up to anything other than what I wanted.
Leanne
From the initial project planning and help with interior design, to the execution it has been a fault free experience — coming in on time and on budget.
Alexanda G
They were always upfront and honest. The whole team is extremely professional and genuine. Good communication throughout the job. The quality of construction, materials,..
Michael S
Walk Through a Real Granny Flat at
Our Castle Hill Showroom
See two of our most popular designs in person: the spacious "Banksia" with standard inclusions, and the open-plan, fully upgraded luxury "Belmont." View materials, colours and upgrade options, and speak with our granny flat specialists.
Address
8/10 Anella Ave, Castle Hill NSW 2154
Hours
Weekdays 9am–4:30pm, Saturdays Closed
Appointment
Display home currently viewable by appointment only
Frequently Asked Questions
Do you build custom granny flats, or kit homes?
We custom design and build every granny flat from scratch for your block — we are not a kit home or transportable building company.
Do I get a say in the colours and finishes?
Yes, you choose your own colours, materials and finishes, with luxury upgrade options available.
Do you handle council approval?
Yes, we work with Councils, Private Certifiers and Engineers to manage approval as part of our process.
Is Granny Flats Australia the actual builder, or do you outsource construction?
We are the builder — construction is not outsourced.
Your Dream Granny Flat Is Closer Than You Think
Customise your design in 3D with us. Easy to get started, we handle it all from design to approval to construction.
8/10 Anella Ave, Castle Hill NSW 2154
Trust & Insurance
HIA Member
Home Owners Warranty — QBE Insurance
$10M Public Liability — MECON
Construction Risk — Hollard Insurance
© Copyright Granny Flats Australia. All Rights Reserved.
Builders Licence Number: 218844c.