Granny Flat Gold Coast: 2026 Rules and the Real Cost of Going Over 80m²
Last updated: 16 September 2026
Most Gold Coast homeowners do not need a development application to build a granny flat. A secondary dwelling up to 80m² gross floor area is accepted development in the low, medium and high density residential zones, provided it meets the Secondary Dwelling Code. You will still need building approval from a private certifier. And since September 2022, you can rent it to anyone, not just family.
Below is what applies to your block, what it costs if you go over the limit, and where most projects come unstuck.
Quick answer
Council planning approval needed? Usually no, if you meet the Secondary Dwelling Code.
Maximum size without a DA 80m² gross floor area, excluding decks, patios and carports.
Distance from the main house Attached, or within 10 metres in standard residential zones. Around 3 metres in medium density. Up to 20 metres in rural residential.
Driveway Must share the main house's driveway.
Site cover 50% in the low density residential zone.
Parking One additional on-site space for the secondary dwelling.
Building approval needed? Yes, always, via a private certifier.
Can you rent it out? Yes, to anyone, since 26 September 2022.
Step one: check your zone and overlays
The Gold Coast City Plan sets the requirements. Before anything else, look up your property on the City Plan interactive mapping and note:
Your zone
Your residential density designation, which affects what is buildable on your specific lot regardless of zone
Any overlays: bushfire hazard, environmental significance, flood, landslide, heritage
The residential density overlay catches people out more than anything else on the Gold Coast. Two neighbouring blocks in the same zone can have different outcomes because of it.
In the hinterland, bushfire hazard and environmental significance frequently overlap. Vegetation that must be retained under one overlay is often the same vegetation creating the hazard under the other, which can quietly make a large-looking block far less developable than it appears.
Do you need approval for a granny flat on the Gold Coast?
In most cases, no planning application.
A secondary dwelling is accepted development in the low, medium and high density residential zones, provided it complies with the Secondary Dwelling Code. That means no development application and nothing in writing from Council.
You will still need building approval. That comes from a licensed private building certifier, and it is required regardless of the planning pathway.
Above 80m² the pathway changes, and it changes differently depending on your zone. In the medium and high density residential zones it becomes code assessable. In the low density residential zone it becomes impact assessable, which means public notification and a considerably longer, more expensive process.
The requirements your granny flat must meet
Size
Maximum 80m² gross floor area as accepted development. GFA is measured around the outside of the walls and excludes decks, patios, balconies and carports.
That exclusion is worth designing around. A generous covered deck adds real living space without touching your 80m² allowance.
In rural and rural residential zones the allowance is higher, around 90m².
In the medium density, high density, rural residential and rural zones, the secondary dwelling must also be noticeably smaller than the main house.
The cost of going over 80m²
This is the part almost nobody mentions.
Council can approve a larger secondary dwelling with justification, but exceeding 80m² triggers infrastructure charges in the order of $17,000 to $24,000, indexed annually, on top of the longer assessment pathway and the consultant fees that come with it.
Which is why in practice, 80m² is a hard ceiling rather than a soft one. Almost every project is better off designed to fit under it.
Siting
The secondary dwelling must be attached to the primary dwelling or located within 10 metres of it in the standard residential zones.
That tightens to roughly 3 metres in medium density zoning, and extends to 20 metres in rural residential.
The 10 metre rule is more restrictive than Brisbane's 20 metres and it shapes the design more than people expect. On a long block, where the main house sits matters enormously.
Driveway and services
The two dwellings must share a single driveway. Separate access is not permitted.
The granny flat connects to the same water, sewer and electricity as the main house. If you intend to rent it, separate metering is worth considering. Budget realistically for service connections — costs vary with site conditions and distance from existing connection points.
Site cover and parking
Site cover is capped at 50% in the low density residential zone, counting all buildings and structures on the lot.
You need one additional on-site car parking space for the secondary dwelling, beyond what the main house requires.
Privacy and character
Windows and outdoor living areas must be designed to minimise overlooking of the primary dwelling and neighbouring properties. Where there is direct view between dwellings, privacy screens achieving at least 50% transparency are required.
The secondary dwelling should be constructed and designed using materials consistent with the main house on the site.
These are best resolved at design stage through window placement and orientation, rather than left to become conditions of approval.
Energy efficiency
All new dwellings must meet NCC 2022 energy efficiency requirements, including a 7 star NatHERS rating. On a well-oriented building this is straightforward.
Can you rent out a granny flat on the Gold Coast?
Yes, to anyone. This is the rule most sites still get wrong, including several Gold Coast builders.
On 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. Homeowners can rent a secondary dwelling to any tenant, related or not. It remains in place as at September 2026.
You do not need a dual occupancy approval simply because you want to rent your granny flat out. That was the position before September 2022 and a lot of published information has never been updated. The Queensland Government maintains current guidance on secondary dwellings, and the Residential Tenancies Authority covers the tenancy side.
Three things to be aware of:
It stays on the same title. A secondary dwelling is subordinate to the main house and cannot be sold separately or strata titled.
Renting can trigger additional building requirements. Additional fire separation and sound transmission provisions of the building code may apply where a secondary dwelling is tenanted. Raise it with your certifier before you start.
Older approvals may carry occupancy conditions. If yours does, you may need a change application under the Planning Act 2016 before renting.
Secondary dwelling versus dual occupancy
A secondary dwelling is subordinate to the main house, on the same lot and the same title, sharing a driveway. That is the accepted development pathway above, and it is what almost everyone actually wants.
A dual occupancy is two dwellings of comparable standing on one lot. It is assessed under the Dual Occupancy Code, carries its own requirements around road frontage, parking, private open space and street surveillance, and is only accepted development in some zones. Check the Development Assessment Table for your zone.
Consider dual occupancy if you want two genuinely independent dwellings. For a granny flat you intend to live in or rent out, you almost certainly want a secondary dwelling.
What if my plans don't meet these requirements?
You can usually still build, with a development application.
The common triggers:
More than 80m² gross floor area
Sited more than 10 metres from the main house
Separate driveway
Site cover or parking non-compliance
An overlay affecting the property
Remember the zone distinction: above 80m², low density residential means impact assessment with public notification, while medium and high density means code assessment. That difference is worth understanding before you commit to a design.
Which designs work on the Gold Coast
With a hard 80m² ceiling and a 10 metre siting rule, design choice matters more here than in most councils.
At the limit. The Amber 80 three-bedroom secondary dwelling, Onyx 80, Olive 80 and Jasper 80 are designed to sit right at 80m² with deck space on top that doesn't count toward GFA.
Comfortably under. The Olive 60 two-bedroom granny flat, Valencia 60 and Amber 60 leave room where site cover is tight or the main house already has a large footprint.
Tight sites. The Seville 40 and Seville 50 suit smaller blocks and constrained 10 metre siting.
See the full range, or walk through a completed home.
Frequently asked questions
How big can a granny flat be on the Gold Coast? Up to 80m² gross floor area as accepted development, excluding decks, patios and carports. Around 90m² in rural and rural residential zones. Larger is possible with a development application, but it triggers infrastructure charges of roughly $17,000 to $24,000.
Do I need council approval for a granny flat on the Gold Coast? Usually no planning application, if you comply with the Secondary Dwelling Code. Building approval from a private certifier is always required.
Can I rent my granny flat to a tenant? Yes. Since 26 September 2022 there is no requirement that the occupant be related to the household in the main house.
How far from the main house can it be? Attached, or within 10 metres in standard residential zones. Around 3 metres in medium density. Up to 20 metres in rural residential.
Can it have its own driveway? No. The secondary dwelling must share the main house's driveway.
Do decks and patios count toward the 80m²? No. Gross floor area is measured around the external walls and excludes decks, patios, balconies and carports.
Can a granny flat be sold separately on the Gold Coast? No. It remains on the same title as the main house.
How long does approval take? Where no development 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
With a hard 80m² ceiling, a 10 metre siting rule and infrastructure charges waiting on the other side, Gold Coast projects live or die at design stage. That is where we start.
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. We also have a display home on the Gold Coast you can walk through.
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 City of Gold Coast before relying on this guide.