AGATHĒ builds quality granny flats in Thornleigh, bringing expert craftsmanship and a genuine appreciation for this peaceful, family-loved suburb to create spaces that add real value and work beautifully for the way your family lives.
At AGATHĒ, a granny flat is never a budget afterthought in the backyard. It's a Scandinavian-designed, high-performance home in miniature — built with the same building science, natural light, low-tox materials, and considered craftsmanship as our Scandi homes. Beautiful, healthy, and built to last.
We turn generous backyard spaces into beautiful, self-contained homes — thoughtfully designed, carefully finished, and built to sit naturally alongside the character of your existing home. The result is a practical, elegant space for ageing parents, adult children, a quiet home office, or quality rental income.
Thornleigh is the kind of suburb that draws families in and keeps them there. Large blocks, lush gardens, a quiet pace of life, and a genuine community feel make it one of Sydney's most loved and tightly held neighbourhoods on the Upper North Shore. Properties here have real space to work with, and that's exactly what makes them so well suited to a thoughtfully designed granny flat. Whether you want a comfortable, independent space for ageing parents, a private retreat for adult children, a peaceful home office set apart from the main house, or a quality rental in a suburb with strong and steady demand — we'll design and build something that fits right into Thornleigh and adds genuine, lasting value to your property.
Partial to full-scale renovations that transform your existing spaces into healthy, beautiful family living environments.
Custom extensions that integrate seamlessly with your home's design, enhancing space, comfort and value.
Start the right way with our PAC-certified process — aligning design, budget and timeline before you build.
Scandinavian-inspired homes and cabins built to a healthy, high-performance standard.
Builder-led delivery of custom homes and certified Passive House builds, managed end to end.
From design to delivery, we manage every detail for a smooth, on-time, on-budget build.
Whether you are at the early thinking stage or ready to move, we are happy to have an honest conversation. No obligation. We will tell you if we are not the right fit.