Granny Flat Ipswich: The Rules Changed in 2026 — What Applies Now
Last updated: 16 September 2026
The rules in Ipswich changed on 1 July 2025, and most of what's written online is now out of date. Under Ipswich City Plan 2025, many secondary dwellings are accepted development — no planning application required, just building and plumbing approval. The old limit of 50m² with a single bedroom is gone. Maximum size is now set by the size of your lot, and larger blocks allow substantially more.
Ipswich has gone from one of the most restrictive councils in Southeast Queensland to one of the most permissive.
Quick answer
Did the rules change? Yes. Ipswich City Plan 2025 replaced the 2006 scheme on 1 July 2025.
Council planning approval needed? Often no. Many secondary dwellings are now accepted development.
Building approval needed? Yes, always, plus plumbing approval. Via a private certifier.
Maximum size Banded by lot size. Bigger lot, bigger allowance. No longer a flat 50m².
Bedroom limit The old one-bedroom restriction on auxiliary units no longer applies.
Can you rent it out? Yes, to anyone, since 26 September 2022.
Separate title? No. A secondary dwelling stays on the same title as the main house.
What actually changed on 1 July 2025
Ipswich City Plan 2025 replaced a planning scheme that had been in place since the mid-2000s. For anyone thinking about a granny flat, three things changed at once.
The approval pathway. Previously, essentially every granny flat in Ipswich required a planning application. Under the new scheme, a compliant secondary dwelling can be accepted development, which means no planning application at all. You go straight to building and plumbing approval through a private certifier.
Council estimated the change could open up around 22,000 properties across Ipswich to adding a granny flat without a formal development application.
The size limit. The old scheme defined a small granny flat as an "auxiliary unit" — under 50m² gross floor area with a maximum of one bedroom. Anything larger was treated as a dual occupancy and needed a full application. That definition no longer governs. Maximum gross floor area is now tied to the size of your lot.
The bedroom limit. The one-bedroom cap on auxiliary units is gone.
Then versus now
What Council calls it Was an auxiliary unit. Now a secondary dwelling.
Maximum size Was a flat 50m². Now banded by lot size.
Bedrooms Was capped at one. No fixed cap now.
Planning application Was required. Often not required now.
If you want something larger Was a dual occupancy application. Now a code assessable application.
If you looked into a granny flat in Ipswich before mid-2025 and gave up because 50m² and one bedroom didn't work for your family, it is worth looking again.
How big can you build?
This is the question everyone asks, and Ipswich no longer has a single answer.
Under the new scheme, the maximum gross floor area for a secondary dwelling as accepted development is banded according to the size of the primary lot. A 500m² block and a 900m² block have different ceilings. There is also no strict minimum lot size in most residential zones, so smaller blocks aren't automatically excluded.
Gross floor area generally excludes decks, patios, carports and similar unenclosed structures, which matters more than people expect — a well-designed deck adds usable living space without eating into your cap.
Because the figure depends on your lot, check it against your specific property rather than a number you read online. Look up your lot on the Ipswich planning scheme mapping through Council, or send us your address and we'll tell you which band you fall into.
Be careful with older articles. A great deal of what's published about Ipswich still describes the 50m², one-bedroom auxiliary unit rule that was superseded in July 2025.
Do you need Council approval?
Often, no planning approval. If your proposal sits within your lot's gross floor area band and meets every other benchmark — setbacks, height, site cover, parking, siting relative to the main house — it can proceed as accepted development.
You always need building approval, and plumbing approval. These come from a private certifier and Council respectively, not from a planning application. Accepted development means no planning application. It does not mean no approval.
Overlays can override all of it. This matters more in Ipswich than almost anywhere else in Southeast Queensland.
Overlays: the thing that catches people out in Ipswich
Ipswich floods. Council has been explicit that the new scheme strengthens planning and development considerations around flood risk, with code-enforced requirements to ensure development doesn't pose unacceptable risk to people and property.
Common Ipswich overlays that can add requirements or push you into an assessable pathway even when your size is compliant:
Flood and overland flow
Bushfire hazard
Biodiversity and vegetation
Character areas and heritage places
Difficult topography and landslide, covering slopes above 15%
Infrastructure corridors
Check overlays before you design anything. An overlay doesn't necessarily stop the project — it changes the engineering, the floor level, or the pathway. Finding out at design stage is cheap. Finding out after you've fallen in love with a floor plan is not.
Can you rent out a granny flat in Ipswich?
Yes, to anyone. Since 26 September 2022, an amendment to the Planning Regulation 2017 removed the restriction limiting occupancy of a secondary dwelling to members of the primary household across Queensland.
Ipswich was ahead of most councils here even before that change, and City Plan 2025 brings the scheme fully into line with the state position.
Three things to be aware of: it stays on the same title and cannot be sold separately; tenanting can trigger additional fire separation and sound transmission requirements under the building code; and an older approval carrying occupancy conditions may need a change application first.
Full detail on the statewide position is in our Queensland granny flat rules guide.
Secondary dwelling versus dual occupancy
A secondary dwelling is subordinate to the main house, on the same lot, on the same title. That's the accepted development pathway above.
A dual occupancy is two dwellings of comparable standing on one lot. Larger, assessed differently, and a different application pathway. Under the old Ipswich scheme, anything over 50m² was pushed into this category. That is no longer automatically the case.
What if your plans exceed the accepted development limits?
You can still build. It becomes a code assessable application rather than accepted development, which means a planning application assessed against the relevant codes, but without public notification.
The common triggers:
Gross floor area above your lot's band
Setback, height, site cover or parking non-compliance
Siting too far from the main house
An overlay affecting the property
A code assessable application adds time and consultant involvement. It is a normal process and plenty of projects go through it.
Which designs work in Ipswich
Because the cap scales with lot size, the right design depends on your block.
Smaller lots. The Seville 40 one-bedroom granny flat and Seville 50 are designed for tight footprints, with decks that add living space without adding gross floor area.
Mid-size lots. The Olive 60 two-bedroom granny flat, Valencia 60 and Amber 60 sit in the range most suburban Ipswich blocks will support.
Larger lots. This is where the new scheme really changes things. The Amber 80 three-bedroom secondary dwelling, Onyx 80 and Olive 80 were effectively off the table in Ipswich under the old 50m² rule. On a generous block they are now realistic.
Frequently asked questions
Did Ipswich granny flat rules change in 2025? Yes. Ipswich City Plan 2025 took effect on 1 July 2025, replacing the previous scheme. Secondary dwellings became accepted development on many properties and the 50m² one-bedroom auxiliary unit limit was superseded.
Is the 50m² limit still in place in Ipswich? No. That was the old auxiliary unit definition. Maximum gross floor area is now banded by lot size.
Do I need a development application for a granny flat in Ipswich? Often not. If you meet your lot's size band and all other benchmarks with no triggering overlays, it can be accepted development. Building and plumbing approvals are still required.
Can I rent out a granny flat in Ipswich? Yes, to anyone. Since 26 September 2022 there is no requirement that the occupant be related to the household in the main house.
Can a granny flat in Ipswich have more than one bedroom? Yes. The one-bedroom restriction under the old auxiliary unit definition no longer applies.
Does flooding affect whether I can build? It can. Ipswich has extensive flood and overland flow overlays and Council has strengthened flood provisions in the new scheme. Check your overlays before designing.
Can a granny flat be sold separately in Ipswich? No. It remains on the same title as the main house.
How long does approval take? Where no planning application is needed, a building approval typically runs five to six weeks once drawings, engineering, soil testing and energy compliance are complete.
How Compact Homes can help
Ipswich changed more than any council in South East Queensland last year, and a lot of what is published about it is still wrong. We work to the current scheme, not the one that was replaced in July 2025.
Our approval package is $12,500 and covers architectural drawings, soil testing, engineering, surveying, certifier fees, energy efficiency compliance, and full management through to a building approval for your block.
Guides for other Southeast Queensland councils
We know the development requirements around secondary dwellings well, but we are not town planners. If you need formal planning advice, let us know and we can point you to someone. Planning rules change — always confirm the current position with Ipswich City Council before relying on this guide.