Secondary Dwellings in Queensland: Rules, Approvals and Pitfalls
A secondary dwelling is a self-contained home on the same lot as your main house. Think granny flat, but with its own kitchen, bathroom, bedroom and living area. In Queensland it is defined as a subordinate dwelling used in conjunction with a dwelling house, and whether you need council approval depends on your site, your council’s planning scheme and whether the design meets the relevant code. This guide explains the definition, the line between a secondary dwelling and dual occupancy, the approval pathway, and how the rules differ interstate.
TL;DR
A secondary dwelling is a subordinate, self-contained home on the same lot as a house. It shares the title and cannot be sold on its own without subdividing.
If it shares services and access with the main house and stays within the code, it may not need a full development application. If it does not comply with the Dwelling House Code, council approval is required.
Since 26 September 2022 Queensland has no restriction on who can live in a secondary dwelling, so you can rent it to anyone.
If the second home is separately serviced, leased or used independently, it is likely dual occupancy, which is a bigger approval.
Rules vary by state and council. Check your property’s zoning, overlays and sewer before you design anything.
Table of Contents
What counts as a secondary dwelling?
The core definition is consistent across Australia. A secondary dwelling is a self-contained dwelling established in conjunction with a principal dwelling on the same lot. It may be within, attached to or separate from the main house, as Shoalhaven City Council describes it for New South Wales.
In Queensland, the wording comes from the Planning Regulation 2017. Townsville City Council’s fact sheet explains that a secondary dwelling is a subordinate, self-contained dwelling used in conjunction with a dwelling house on the same lot.
Three words matter in that definition:
Self-contained. It has its own kitchen, bathroom and living and sleeping space. A bedroom with an ensuite and no kitchen is usually just an extension.
Subordinate. It is smaller and secondary in function to the main house. Councils often set a maximum floor area in their planning scheme, so check yours.
In conjunction with. It is tied to the main house, not a separate property that happens to share a lot.
That last point is where most projects get into trouble.
Secondary dwelling or dual occupancy?
The difference is not just the size. It is how the second home is serviced and used.
The Sunshine Coast Council’s secondary dwelling information sheet says a secondary dwelling should share common services, such as water connections and vehicle access, with the primary dwelling. That shared connection keeps it subordinate. Shoalhaven City Council draws the same line: an additional dwelling that is separately serviced, leased and/or used by another household is treated as dual occupancy.
Feature | Secondary dwelling | Dual occupancy |
Relationship to main house | Subordinate, used in conjunction | Two independent dwellings |
Services and access | Shared with the main house | Typically separate |
Title | Same title as the main house | Often prepared for later subdivision or strata |
Typical approval | May be code assessable or self-assessable if it complies | Usually a development application |
Resale | Sold together with the main house | Can be sold separately once titled separately |
Townsville City Council notes that the confusion between dwelling types is common and recommends independent town planning advice, because classification depends on the specific nexus requirements. We agree. Getting the label wrong at the start can mean redesigning after you have paid for plans. If your goal is two homes that can be sold separately, you are really looking at a duplex or dual occupancy, which our guide to building a duplex in Brisbane covers.
Can you have two dwellings on one title?
Yes. A main house and a secondary dwelling on one title is the standard arrangement. The trade-off is that the properties generally cannot be sold individually without formally subdividing the land into separate titles, as one Australian property guide puts it. New South Wales is stricter: its Department of Planning states a secondary dwelling cannot be subdivided or titled separately from the principal dwelling, and only one is permitted per site.
In Queensland, reconfiguring a lot is a separate application with its own tests: lot size, frontage, access and, very often, sewer and water infrastructure. Our guide to subdividing a property in Queensland walks through what to check first. Where a title arrangement affects a later sale, it pays to know early. Mortgage specialists note that dual occupancies on a single title are likely, though not always, strata titled, and that title arrangements matter for future sales.
Do you need approval for a granny flat in Queensland?
It depends, and the honest answer starts with your site.
The Sunshine Coast Council’s information sheet explains the logic used across Queensland: if the secondary dwelling cannot comply with one or more requirements in the Dwelling House Code, planning approval from council is required. If it meets every requirement, a development application may not be needed for the planning side. Either way, you still need a building approval for construction.
The things that most often push a granny flat from “simple” to “needs approval” are:
Size and height. Exceeding the floor area limit or building height in your planning scheme.
Setbacks. Building too close to a boundary, a road or a protected feature.
Overlays. Flood, bushfire, character, heritage, landslide, waterway or airport overlays can change the assessment level.
Services. Sewer or stormwater infrastructure running through the building area, a common issue on older lots. We have seen it complicate even simple lot splits, as in our Logan 1 into 2 lot subdivision case.
Access and parking. Driveway width, crossovers and car space requirements.
Zoning. Not every zone treats a secondary dwelling the same way, and councils write their own provisions.
Because each council sets its own planning scheme provisions, the figure you read for another council may not apply to your lot. Start with your council’s online property search or planning scheme mapping, then confirm with a planner before you spend money on drawings.
A simple pre-design check
Find your lot’s zone and every overlay that touches it.
Check the secondary dwelling provisions in your council’s planning scheme.
Locate sewer, water and easements on the lot.
Confirm how the second home will be serviced and accessed, because that decides whether it stays subordinate.
Decide whether you want to subdivide later. If yes, design with that in mind.
Ask a town planner to confirm the assessment level in writing before you engage a builder.
If your project needs a development application, our step-by-step guide to the Queensland DA process shows what to expect. If your plans are instead a bigger alteration to the main house, see home extension planning in Queensland.
Renting out a secondary dwelling
This is the most useful change for owners in recent years. An amendment that took effect on 26 September 2022 removed restrictions on who can live in secondary dwellings across Queensland. Homeowners can rent a secondary dwelling, such as a granny flat, to anyone, not just family or dependants.
That shifts the economics. A granny flat is no longer only a place for relatives. It can be a rental income stream, a space for an adult child or a home office with a bathroom, all within the same planning definition.
Two cautions in practice. First, renting is a use matter, not a servicing one: if you separately meter, separately fence or give the second home its own independent access and services, you may be drifting towards dual occupancy. Second, tenancy law, insurance and tax are separate from planning, so speak to your insurer and accountant.
How the rules differ across Australia
People searching this topic come from every state, and the rules are not interchangeable. A few official reference points:
New South Wales. Secondary dwellings can be approved through a complying development certificate or a development application. Complying development must meet the National Construction Code and other requirements, as Shoalhaven City Council explains. The state’s housing planning page sets a minimum lot of 450m² for complying development and allows a new principal dwelling and a new secondary dwelling under a single certificate.
Victoria. A small second dwelling can be up to 80 square metres on the same lot as an existing dwelling. It is permitted in all residential and rural zones and normally does not need a planning permit unless specified exceptions apply, though a building permit is normally required. There are no restrictions on who can live in it.
Western Australia. From April 2024, compliant ancillary dwellings up to 70sqm on residential lots of any size do not need planning approval, though a building permit is mandatory. The same reforms removed the previous 350sqm minimum lot size and dropped additional parking bays in most locations.
Queensland. Rules sit in the Planning Regulation 2017 and each council’s planning scheme, so the practical limits vary between Brisbane, Moreton Bay, Logan, Ipswich and other councils.
The lesson: never apply a rule from one state or council to another. Even within Queensland, an online forum answer about a different local government area can mislead you.
Costs and timing
We do not publish fixed fees for planning work, because the scope depends on the site. What we can say is where the money and time go:
Planning advice and assessment to confirm whether you can proceed without a development application.
Development application preparation and lodgement if the design cannot meet the code.
Specialist reports where overlays or services require them, for example flood, bushfire or civil engineering input.
Building design, certification and construction, which usually make up most of the total spend and are separate from planning.
The cheapest project is the one that is designed to comply from the start. Changing a design after a refusal or an information request costs more than getting the site check right at the beginning.
Common mistakes we see
Designing before checking the site. Drawings are drawn, then an overlay or sewer line makes them unbuildable.
Treating a second house as a granny flat. A large two-storey dwelling with its own driveway and services is likely to be assessed as dual occupancy.
Assuming a neighbour’s approval applies to you. Different lots, different overlays.
Planning to sell separately without a subdivision pathway. A secondary dwelling shares the title.
Skipping advice on the way the lot is serviced. Shared services help keep the home subordinate, and separate services can change the classification.
Our perspective
Most of the secondary dwelling enquiries we receive begin with a builder’s quote and a hope that no approval is needed. Sometimes that is right. Often the lot has an overlay, a sewer easement or a design feature that moves it into a different assessment level. Our approach is practical and commercially focused. Before drawings are finalised, we look at the property, the planning scheme and the owner’s goal. Is this a granny flat for family, a rental, or a stepping stone to two separate titles? The answer decides whether you need a simple compliance check, a development application or a duplex or subdivision strategy. We guide clients from initial site investigations through to lodgement, tailored to the local council’s requirements. We cannot promise any outcome, because council assesses every application on its merits. What we can do is set the project up with technical precision and foresight, so that it is designed to meet the planning requirements and avoid avoidable delays. Jwal
Talk to a town planner before you design
If you are weighing a granny flat, a duplex or a two-lot split in Brisbane or South East Queensland, we can assess your lot and tell you which pathway fits. Our team handles dual occupancy, subdivisions, townhouses and special projects, from the first site investigation to lodgement. See our town planning services or check the areas we service.
Bring your property address, a rough idea of the size and use of the second dwelling, and any plans you already have. That is enough for us to start.
FAQ
Is a granny flat the same as a secondary dwelling?
In everyday language, yes. Planning documents use the term secondary dwelling, and in Western Australia the term is ancillary dwelling. All describe a self-contained home on the same lot as a main dwelling. The exact definition and limits come from the relevant state and council.
Can I have two houses on one title in Queensland?
Yes, a main house and a secondary dwelling can sit on one title. The second home cannot be sold separately unless the land is subdivided into separate titles, which needs its own approval. If you want separate ownership, consider dual occupancy or a subdivision pathway instead.
Can I rent my granny flat to a stranger?
In Queensland, yes. Since 26 September 2022 there is no planning restriction on who can live in a secondary dwelling. Victoria also has no restriction on who can live in a small second dwelling. Tenancy law, insurance and tax are separate matters.
Do I always need council approval for a granny flat?
Not always. In Queensland, if the secondary dwelling cannot comply with one or more requirements in the Dwelling House Code, council approval is required. If it complies, a planning application may not be needed, but building approval still is. Your property’s overlays and local planning scheme decide which applies.
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