Granny flat construction
Local granny flats

The design and function you want
at an affordable price.

Hills Granny Flats is a team of experienced builders and designers who have been building for homeowners for over 20 years. We're proud to offer a professional service at an affordable price, ensuring that you get the best possible experience when building your granny flat with us.

Build a Better Tomorrow


Years of Experience


Countries We Work In


Companies We Work With


Successful Projects Done

local excellence

Hills Granny Flats is a local business that has been providing building service in the Castle Hill and Hills region for over 20 years.

We provide accurate designs, communicate throughout the process and offer modern options for layout and design. Our experienced team is familiar with property and building regulations so you don't have to be!

Our aim is for you not to feel constrained on space, functionality or aesthetics. We want all of your needs met without compromising aspects of your ideal Granny Flat. We also know what it's like looking at a blank canvas when it comes to adding an extra dwelling—you have so many ideas and questions about how it'll look or what exactly it'll do for you.

That's why we make sure there are no surprises along the way by maintaining open communication throughout the entire process.

Hills granny flat team

Professional team

From the moment we start to the moment that we finish, we treat your home with respect, clean up after the build and ensure we communicate throughout the process.


Our team aims to eliminate to keep the project within the quoted amount. Transparency is important to us and to your budget so that there are no additional surprises.


Our friendly team keep the process smooth as possible, reduce your stress and make the whole process a more enjoyable.


Take a look at some of our previous work

Frequently asked questions

Can you provide references or examples of similar projects that you have completed in the past?
Can you provide an estimate of the total cost of the project, including all materials and labour?
Will you provide a detailed contract outlining the scope of work, timeline, and payment terms?
How will you ensure that the granny flat meets all relevant building codes and regulations?

Get in Touch today

We offer an obligation free quote. Contact us and we will respond promptly to go through your needs, requirements and ideal granny flat.

Hills area

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Latest News From Our Blog.

The photo shows a granny flat architectural design

May 6, 2023

What To Consider When Building A Granny Flat

In this article we'll explore some considerations so you can get started with building your own Granny Flat!

by Sarah Collins

Shows Granny flat architectural designs

May 6, 2023

5 Ways To Get The Most Out Of Your Granny Flat

Granny flats are a great way to increase the value of your property. They can be used as an extra bedroom, guest room or home office. They are also a great way to accommodate family members who may need some help with their finances or medical issues.

by Sarah Collins