Granny flat designs. Ready-to-install secondary living

A prefab granny flat that goes up in half the time

A Boxed Building granny flat is constructed from Structural Insulated Panels, engineered off-site and delivered to your property as a complete kit. The panels are cut, insulated and finished in a controlled factory environment, so the assembly on your block is fast and predictable. Half the build time of a conventional project. Fully insulated and a cost that's clear from the start because the design is fixed and costed. You'll need a registered builder, an electrician and a plumber. Bring your own trades or we'll connect you with people who've built these before and know the system well.

A granny flat costs less than you'd expect

Granny flat cost depends on the design size, internal specifications, and what your site needs in terms of preparation and services. A prefab granny flat gives you a much clearer cost picture from the outset because the design is established and the manufacturing process is repeatable. Most families find a well-designed granny flat in Victoria costs less than they expected when they first started looking. And once you factor in the long-term value it adds to your property, or the rental income where regulations allow it, the numbers tend to make more sense than you anticipated.

Can you build a granny flat on your block?

Probably yes. Granny flat rules in Victoria sit across the planning scheme and building regulations, and they vary by council, lot size, and how the occupancy is structured. Most residential blocks in Melbourne can support a granny flat. Granny flat approval requires a building permit, and in some zones a planning permit as well. We include planning documentation in every project. We know the granny flat regulations and permit requirements across Melbourne's western suburbs, and we'll give you a straight answer on what's possible before anything is locked in. No guessing. No surprises halfway through.

Getting your granny flat built

We manage the permit documentation and planning from the start, working through the approvals that apply to your specific site so nothing stalls the project once the kit is ordered. Once approvals are in place and your trades are organised, assembly moves quickly. We can stay involved through the build to make sure the finished granny flat is exactly what was designed, approved, and promised.

Close enough to share a meal. Far enough to close the door

Picture your parent settled in their own space on your property. Their kitchen, their bathroom, their front door. Close enough that you can check in on a Tuesday evening without it feeling like an event. Far enough that both of you can breathe. The kids pop across the garden after school. Sunday lunch happens because everyone wants to be there, not because they're already stuck under the same roof.

That's what a well-placed granny flat actually delivers. Not just extra space. A better version of how your family lives together.