When our Client approached Acrow, he had a clear vision: a full-sized granny flat that looked and felt like a real home—with its own garage. The starting point was The Trinity, a popular 3-bedroom design from Acrow’s collection, but a few key tweaks were made to bring it all together.
Now complete in Muswellbrook, this project shows how clients can achieve both comfort and practicality—while staying cost-conscious.
The Design: The Trinity – Modified
The Trinity is one of Acrow’s most spacious layouts, offering three bedrooms, open-plan living, and a full kitchen and bathroom. For Silva’s home, the design was modified to include a garage, a feature not often seen in standard granny flats.
To make it work:
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The front door was relocated to the opposite side of the living area
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This allowed space to attach a single garage with a panel lift door
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Entry is still welcoming, with a Merbau timber deck and stairs at the porch
Despite the addition, Silva stuck to Acrow’s standard inclusions, avoiding unnecessary extras to keep the build efficient and on budget.
Garages and carports can be added to almost any Acrow granny flat—just ask for it to be costed at the design stage.
SOG Construction and Smart Planning
The home was built on a slab-on-ground (SOG) with a drop edge beam, perfectly suited to the site’s fall and soil profile. A timber frame and truss system keeps the construction lightweight and adaptable.
Construction began on 6 December 2024 and reached Practical Completion by 6 June 2025. That’s a 22-week build period, including delays for the Christmas break and extensions of time (EOTs)—well within expectations for a 3-bedroom dwelling with a garage.
Plumbing Performance Solution: A Custom Approach
As part of the planning process, Acrow coordinated a plumbing performance solution to meet local site and drainage conditions. This was developed by engineering consultants to comply with Muswellbrook Council requirements and the National Construction Code, ensuring water runoff and subsurface drainage were properly managed for a long-term, low-maintenance outcome.
From grading the ground away from the footings to sleeving pipes under the slab and using clay backfill to reduce moisture ingress, every detail was covered by the engineering team before construction began.
BAL 12.5 Bushfire Compliance
The property is located in a BAL 12.5 bushfire zone, meaning the build required:
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Compliant glazing to windows and doors
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Sealed ember-proof construction methods
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Fire-rated materials and finishes
These measures were implemented seamlessly without compromising on design or budget.
Client Review: Thoughtful, Cost-Effective Service
Here’s what Silva had to say in his 5-star Google review:
“Acrow Granny Flat had designed a beautiful granny flat at my property in Muswellbrook. Special thanks goes to Acrow Granny Flats sales manager Mick Springs for his exceptional and outstanding customer service, going above and beyond to help the client out and for his smart thinking on how to get the most cost effective solution for the clients. I would also like to thank Crystal, Dario and rest of the team for their support in building this beautiful Granny Flat.”
Silva’s review speaks volumes about the team’s approach. Whether it’s finding practical solutions, meeting bushfire requirements, or adapting designs to suit the land, Acrow focuses on cost-effective outcomes that don’t cut corners.
Granny Flat with Garage Project Gallery
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Thinking About a Granny Flat with a Garage?
If you want to build a granny flat with a garage or carport, Acrow can help you modify an existing plan—just like we did for The Trinity.
We handle the entire process, from CDC or DA submission through to final handover, and we’re known for working closely with clients to help them build smarter, not just bigger.
Book a free site inspection today to find out what’s possible on your block—anywhere in NSW or the ACT.
We can help you build a granny flat with garage access, storage space, or room for hobbies—whatever suits your needs.