Our steel-structure granny flats are designed for homeowners who want a durable, energy-efficient and space-smart solution without compromising on style. Whether it’s for extended family, guest accommodation, or rental income, we deliver high-quality secondary dwellings that are built to last in Western Australia’s climate.

Steel-frame construction offers unmatched benefits:

• Superior Strength & Durability: Resistant to termites, warping, rot and moisture — ideal for long-term performance.

• Faster, Cleaner Construction: Pre-engineered steel frames allow for quicker build times, precision assembly and minimal on-site waste.

• Energy Efficiency: Enhanced thermal performance and airtight construction options help reduce ongoing power costs.

• Design Flexibility: Modern layouts, high ceilings and open-plan designs made possible through the strength of steel framing.

• Low Maintenance Living: Steel structures require less upkeep, ensuring long-term cost savings and peace of mind.

We offer a complete turnkey service, from design and approvals through to construction and finishing touches. Each granny flat is expertly built to meet WA regulations, blend with your existing home and maximise the value of your property.

With Project Building Innovations, your steel-structure granny flat isn’t just an addition — it’s a smart investment in comfort, sustainability and future flexibility.