Onyx 80
Eighty square metres of contemporary living, designed around genuine independence. An 80m² granny flat with two bedrooms, two bathrooms, and a floor plan that gives each occupant their own space without compromise. Clean lines, considered proportions, and a presence that feels far more substantial than its footprint suggests. The maximum size permitted without a development application in Brisbane and on the Gold Coast.
· 80m² · 2 Bed - 2 Bath
FAQs
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An 80m² granny flat is the accepted development ceiling in Brisbane and on the Gold Coast. Logan allows 100m² on lots of 1,000m² or more, and Gold Coast rural zones stretch to around 90m². Larger needs a development application.
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In Brisbane and on the Gold Coast, usually no planning application provided every other benchmark is met. Building approval through a private certifier is always required — accepted development removes the planning application, not the approval.
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It means the proposal already meets the council’s code, so no planning application is needed and nothing has to be approved in writing by council. An 80m² granny flat still needs building approval through a private certifier.
Eighty square metres is where the straightforward pathway ends. Under it, the Gold Coast assesses a secondary dwelling against its code without a planning application at all. Over it, the process changes shape — Brisbane moves to a development application, and in the Gold Coast’s low density zone it steps up to impact assessment with public notification, adding consultants and months to the timeline. The Onyx 80 is drawn to sit directly underneath that line.
Also consider the Jasper 80 in a wider form or the Amber 80 with three bedrooms.
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