GRANNY FLATS
CASTLE HILL
AGATHĒ builds quality granny flats in Castle Hill, bringing expert craftsmanship and a genuine appreciation for this vibrant, family-loved suburb to create spaces that add real value and work beautifully for the way your family lives.
GRANNY FLATS IN CASTLE HILL
See how we turn backyard spaces into beautiful, self contained homes. Our granny flat gallery shows careful building, modern design, and how we blend new structures with your existing property, creating practical solutions for family living, guests, or rental income with quality finishes and clean design.
WONDERING WHERE TO START?
Castle Hill is widely regarded as the crown jewel of Sydney's Hills District — and it's not hard to see why. With leafy streets, a strong sense of community, outstanding schools, and Castle Towers on the doorstep, it offers a lifestyle that genuinely has something for everyone. Generations of families have put down roots here, and with the Castle Hill Metro now making city access easier than ever, it continues to attract people looking for the best of both worlds — a relaxed, family-friendly neighbourhood without giving up urban convenience. Homes in Castle Hill tend to have solid backyards well suited to a thoughtfully designed granny flat. Whether you're looking to create a comfortable, independent space for ageing parents, a private retreat for adult children, a quiet home office away from the main house, or a quality rental in one of Sydney's most in-demand suburbs — we'll design and build something that fits beautifully into Castle Hill and adds genuine, lasting value to your property.
DISCOVER OUR SERVICES
HOME RENOVATIONS
From partial to full-scale renovations, our services are designed to transform your existing spaces into stunning, family living environments.
CUSTOM EXTENSIONS
Expand your Northern Beaches Home with our bespoke extension solutions that seamlessly integrate with your home’s current design, enhancing both space and value.
PRE CONSTRUCTION
Start your build the right way with our PAC-certified pre-construction process – a collaborative approach that aligns your design, budget, and timeline.
ALTERATIONS & ADDITIONS
Refresh your existing space with thoughtful alterations and additions that enhance flow, functionality, and the way your home supports your lifestyle.
HEALTHY HOMES
Prioritise wellness and sustainability with our Healthy Homes approach – designed to improve air quality, light, and overall comfort in every corner.
ARCHITECTURAL CONSTRUCTION
Bring your architect’s vision to life with precision. Our expert team delivers complex builds with clarity, care, and exceptional craftsmanship.
PROJECT MANAGEMENT
From design to delivery, we manage every detail of your build to ensure a smooth, on-time, and on-budget build that reflects your vision.
GRANNY FLATS
Create flexible, modern living spaces with our custom-designed granny flats – ideal for multigenerational living, guests, or extra income.
CHALLENGING SITES
No site too steep or complex – we specialise in building on challenging terrain with smart solutions that maximise space, access, and design potential.