Bywong home shows structural and performance benefits of precast concrete Rezicast system.
Precast Homes Canberra and Rezicast Systems have won the Modular and Prefabricated Housing division of the 2025 HIA ACT/Southern NSW Housing and Kitchen & Bathroom Awards, recognising a project built using precast concrete methods that are becoming more established in the residential sector.
Project outcome and design approach
The winning home in Bywonga, a rural residential area in the Southern Tablelands of New South Wales, uses precast concrete walls as the primary structure, supported by a design that focuses on durability and interior detail. Timber flooring, a stone-clad fireplace, custom joinery and double-glazed Skyview windows contribute to a controlled internal environment with strong acoustic and thermal performance. The absence of internal load-bearing walls allows for open planning and natural light throughout the living areas.

Precast Homes Canberra operates out of Queanbeyan and is led by Founder and Managing Director Mick Johnson, who has more than two decades of construction experience. Johnson also founded Rezicast Systems, the method used to deliver the project.
How the Rezicast system works
Rezicast Systems is a patented construction approach rather than a building company. It enables licensed builders to assemble precast concrete homes through a structured, accelerated programme based on a 10/10 sequence: 10 days to lock-up and roughly 10 weeks to full completion.

Panels are positioned on engineered pads on day two, followed by truss placement, allowing the structure to become secure early in the process. Plumbing, electrical work, panel coating and slab preparation can begin from day three, as the home is already weatherproof. This sequencing supports predictable scheduling, earlier invoicing for builders and reduced exposure to cost escalation. For homeowners, the shorter timeline is said to decrease rental overlap and limit disruption during construction.

The system’s characteristics—structural strength, bushfire and termite resistance, reduced settlement cracking and the thermal mass of concrete—are evident in the Bywong home. These attributes informed the delivery of the dwelling and contributed to its selection in this year’s modular and prefabricated housing category.
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