Queensland Housing Code Granny Flat Siting: 3 August 2026 Listing

Updated 31 August 2026. The Queensland Housing Code granny flat headline is a listing date, not a statewide overnight rewrite.

Queensland’s Queensland Development Code index now lists the Housing Code as QDC Parts 1.1 and 1.2 with a publication date of 3 August 2026. Those parts cover design and siting for single detached housing on lots under and over 450 m², including secondary dwellings. They do not instantly replace every council planning scheme.

What the 3 August listing actually is

The Business Queensland QDC table points to a Housing Code PDF hosted by the Department of Housing and Public Works. The code is written as statewide design and siting standards (height, setbacks, privacy, car parking, site cover, private open space) for detached houses and secondary dwellings. It is meant to replace older QDC 1.1 / 1.2 material that many councils had layered their own rules on top of.

Industry write-ups talk about a three-year council transition from 1 September 2026. Treat those dates as commentary until your council’s planning scheme says the Housing Code applies. Until a scheme is amended, the local size cap and setback table you already have still run the job. Brisbane City and a regional shire can still disagree about floor area even after the state PDF exists.

Don’t redesign an 80 m² backyard unit because a LinkedIn post said “the state cap is coming”. Queensland still has no statewide secondary-dwelling square-metre figure in the Planning Regulation. Council schemes still set that number.

What to do if you are mid-design in Queensland

Read your current planning scheme overlay and the QDC listing, then ask the certifier which document they will assess against on your lodge date. If you are already in for building approval, a new state code listed in August does not automatically reopen a live application.

Keep using the standing guides: Queensland granny flat rules and Brisbane granny flats. For energy overlays that sit beside siting, see NCC 7-star energy. More Housing Code and Modern Homes notes will land in news as councils publish adoption dates.

If your lot is under 450 m², Part 1.1 is the chapter to watch. Over 450 m², it is Part 1.2. A granny flat on a 380 m² Ipswich lot is not assessed with the same siting table as a 700 m² Townsville block, even when both are “secondary dwellings”.

Parking, setbacks and the bit Facebook skips

Siting codes talk about car parking and private open space as well as height. A statewide table can still lose to a local overlay: flood, bushfire, character, or a covenant that bans a second kitchen. The Housing Code does not punch those off the title. If your lot is in a Brisbane character precinct, BCC’s accepted-development path still sits on top of whatever QDC chapter is in force that week.

So print the QDC listing date (3 August 2026) and your scheme extract into the same folder as the CDC or building-approval pack. If a designer quotes “the new state code” without naming Part 1.1 or 1.2, ask which PDF they opened. The Business Queensland table is the index. The Housing Code PDF is the document. Your council minutes are the adoption story, and those have not all been written yet.