- 2/22 Hudson Avenue, Castle Hill, NSW 2154
- View Open Homes
Building a granny flat with In House is a smart way to add space, value, and long-term income potential to your property. Our licensed NSW builders manage the entire process from design and approvals through to construction and handover, ensuring your granny flat is modern, compliant, and built to last.
With over 25 years in the industry, we bring proven craftsmanship and reliability to every granny flat project.
From council approvals to landscaping, we manage the entire process so you can enjoy a seamless, stress-free build.
Choose from fully customised layouts and high-quality inclusions designed to suit your style, needs, and budget.
At Inhouse Granny Flats, we understand what Sydney homeowners and investors value most – a build that’s simple, reliable, and adds genuine long-term value.
Whether you’re creating space for family or building to earn rental income, we design and construct granny flats that are functional, compliant, and tailored to your property and goals.
When you build with In House Granny Flats, you deal directly with an experienced Sydney granny flat builder from your first site inspection to the final handover. Our team is there to guide you, answer questions and offer expert advice every step of the way.
We also offer a custom design process, giving you the freedom to create a granny flat layout that suits your lifestyle, land and investment goals. Our expert team works with you to turn your vision into reality.
We launched Inhouse Granny Flats to do one thing exceptionally well: design and build secondary dwellings that look great, feel spacious and stand the test of time. Since 2008 we’ve refined our approvals process, tightened our trades network and invested in aftercare, because the build isn’t ‘done’ until you’re proud of it.
Our team is readily available for an immediate on-site assessment to let you know what your block of land is capable of. Unlock instant equity and incredible rental returns with an In House Granny Flat.
Materials and workmanship we’d put in our own homes.
Fixed pricing, clear allowances and proactive communication.
Smart layouts that perform for families and investors.
Approvals to handover handled by one accountable team.
We treat every project like our own, delivering quality craftsmanship, transparent pricing, and lasting value through a seamless, start-to-finish building experience.
If you’re searching for a granny flat company in sydney,
In House Granny Flats is your first choice.
We understand that every client builds with a different purpose. Some are focused on creating a long-term investment, while others simply need more space for family or lifestyle.
At In House Granny Flats, we tailor each project to your end goal, offering custom solutions that emphasise quality, functionality, and long-term value.
From compact studios to larger family-ready flats, our completed projects can be found all over Sydney. Each one showcases the attention to detail, workmanship, and reliability that we’re known for.
We believe building a granny flat should be simple, transparent, and stress-free. That’s why we’ve created a proven four-step process.
We’ll assess your block anywhere in Sydney and discuss your goals.
Our team prepares your plans and manages all council approvals.
You choose your finishes while we deliver on time and to budget.
Move in, rent out, or hand to a property manager — your granny flat is ready.
Customer Testimonials
Our free site inspection covers everything – from local rules and land conditions to design options and pricing. Get a transparent, step-by-step overview of what’s achievable on your property.
We assess your property’s zoning, setbacks, and services to confirm eligibility and ensure your granny flat meets all local requirements.
Whether you’re building for family or investment, we’ll recommend the best layout and design to suit your needs and budget.
Every proposal includes a clear breakdown of inclusions and allowances, so you know exactly what you’re getting from day one.
We’ll guide you through each milestone, from council approval to handover, with a clear and realistic project schedule.
Let’s Price Your Granny Flat
Get a clear plan, an accurate price, and a build path that fits your goal. No pressure, no sales talk, just honest advice from our Sydney team.
We’ll call within one business day to confirm your inspection. Your details stay private.
Prefer to chat now? Call (02) 9659 9009
