Building a granny flat in Sunshine Coast: rules, approval and what the data shows

Queensland's Planning Act 2016 sorts development into three assessment categories: accepted development (no development application needed if you meet the stated requirements), code assessable (a DA assessed against the planning scheme's codes, no public notification), and impact assessable (a DA with public notification and third-party appeal rights). Which category applies to your project is set by Sunshine Coast Planning Scheme 2014 — and it depends on your zone, any precinct that applies, and the overlays on your lot.

Under Sunshine Coast Planning Scheme 2014, a secondary dwelling (granny flat) is contemplated in 5 of the 13 zones we track for Sunshine Coast, including Emerging Community, Low Density Residential, Medium Density Residential, Rural Residential and 1 other zones, and not in 8 others. Where a granny flat complies with the scheme's requirements for the zone — size, siting and the applicable codes — it can often proceed without a planning application (building approval is still required). Fall outside those requirements, or pick up an overlay trigger, and a development application is needed.

Queensland also allows secondary dwellings to be rented separately from the main house (a state-wide change from 2022), which removed the old "household member" restriction in most schemes. The zone table below shows where Sunshine Coast's scheme contemplates a secondary dwelling — but lot size, flood and character overlays, and precinct mapping decide the answer for a specific address.

None of this is answerable with certainty at council level — the pathway for your project is set by your lot's zone, precinct and overlays together. A free Casa block check reads those for your exact address in seconds.

Across 310 decided secondary dwelling (granny flat) applications recorded against Sunshine Coast council, 254 were approved — an approval rate of 82%. That reflects a solid, though not automatic, track record for this kind of proposal. These are real, decided applications assessed by the council, not estimates or modelling.

The median time from lodgement to decision was 67 days (measured across the 307 applications in this cohort with both dates recorded). That is a fairly typical assessment timeframe for South East Queensland. Individual applications vary widely with information requests, referrals and the assessment pathway for the specific site.

We do not hold enough charged decision notices in this cohort to publish a median infrastructure charge for Sunshine Coast. As a statutory ceiling, Queensland caps adopted charges at $36,670.70 per three-or-more-bedroom dwelling or lot (2025–26 indexed) — an upper bound, not an estimate for your project.