Short answer: usually yes, and Noosa treats a granny flat more generously than it treats almost anything else in its planning scheme. In the Low Density Residential zone, a secondary dwelling is Accepted development, subject to requirements, as part of the ordinary dwelling house use. That single fact carries a lot of weight in Noosa, a shire where a duplex or a subdivision routinely runs into much harder tests. But "Accepted" here comes with a specific, tightly worded cap: 65 m² of gross floor area, 2 bedrooms, and permanent occupancy only. Those numbers are not negotiable house rules, they are the acceptable outcome itself.
One thing is constant: a secondary dwelling in Noosa is not a use of its own. It sits inside the dwelling house use under Table 5.5.1 of the Low Density Residential zone, and the standard Queensland definition of a dwelling house includes a secondary dwelling. That is why a granny flat clears an assessment hurdle that a stand-alone duplex or multiple dwelling does not: it is riding inside a use the LDR table already accepts, not asking the table to accept a new one.
The cap, and why it is one of the tightest in South-East Queensland
The Low Density Residential Zone Code sets the secondary dwelling benchmarks in Table 6.3.1.3.1 (acceptable outcomes AO5.1 and AO5.2, verified 3 July 2026):
- Maximum 65 m² gross floor area and no more than 2 bedrooms (AO5.2). Among the fact set we hold for South-East Queensland councils, this is one of the smallest granny-flat caps going.
- No more than one secondary dwelling per site, regardless of site area (AO5.1). A larger block does not buy a second one.
- Not on a lot registered under a Building Unit Plan (AO5.2). If the site already carries a Building Unit Plan, the Accepted pathway is not available. A proposal that misses one of these acceptable outcomes does not stay Accepted: under the scheme's own rules it becomes an assessable application, with the resulting pathway confirmed by a town planner for the specific design.
- Permanent occupancy only. The code's own words (AO5.2, Low Density Residential Zone Code, Table 6.3.1.3.1):
"is not used for short-term accommodation or home-based business (home hosted accommodation)"
That clause sits inside the secondary dwelling acceptable outcome itself, not in a separate short-term-accommodation check bolted on afterward. It means the permanent-occupancy condition is part of what makes the granny flat Accepted in the first place, not a later compliance item. Noosa's wider scheme has restricted short-term accommodation across its residential zones since the major Amendment 2 (effective 26 September 2025), and the secondary dwelling rule sits consistently with that policy. Read this the right way round: the rule bars short-term letting and a home-based business in the secondary dwelling. It is a restriction on how the dwelling can be used, not a scheme statement that any particular rental arrangement is approved; that is a use question a town planner confirms against your specific design and circumstances if it matters to your plans.
Whether the same 65 m²/2-bedroom cap carries identically into the Medium Density Residential or High Density Residential zones has not been separately confirmed in our fact set. If your lot sits in one of those zones rather than Low Density Residential, that is a site check question, not an assumption to carry across.
Why a duplex is a much harder road here, and the granny flat is not
This is the contrast that actually matters in Noosa. Dual occupancy is not listed as a use at all in the Low Density Residential Table of Assessment (Table 5.5.1). Under the scheme's own default rule for an unlisted use, that pushes a Low Density Residential duplex to Impact assessment, the strongest discouragement short of outright prohibition, and it is the zone table doing that, not an overlay (verified 3 July 2026). Medium Density Residential is where dual occupancy becomes genuinely workable, Code assessable subject to siting conditions, but that is a different zone with a different height cap (8 m and 2 storeys) and plot ratio limiting yield well below what the zone name suggests.
So on an ordinary Low Density Residential block, the two-dwelling options split sharply: a duplex is discouraged by the zone table itself, while a secondary dwelling rides inside the accepted dwelling house use, provided it meets the 65 m²/2-bed/permanent-occupancy conditions above. That is the realistic second-dwelling pathway on most Noosa LDR blocks, not the duplex.
One more distinction, carried from LandIntel's locked product definitions and consistent across every council we cover: a secondary dwelling is not separately saleable. It stays on the one title with the main house. A duplex, by contrast, can be titled so each dwelling sells separately, through a Building Format Plan community-title process that is its own step, advised by your solicitor or planner. If the plan is to add a second, self-contained space kept on the one title, the granny flat pathway fits; if the plan is to create a second saleable dwelling, that is a different product and, in Noosa's Low Density Residential zone, a much harder assessment category.
The flood carve-out most owners do not expect
Noosa's Flood Hazard Overlay (Table 5.9.6, verified 7 July 2026) treats a dwelling house differently from almost every other use on the same land. Where the land is flood-affected, a dwelling house, which includes a secondary dwelling under the standard Queensland definition, is Accepted development. The same table pushes any other use "not otherwise specified," which in practice covers a dual occupancy or multiple dwelling proposal, to Code assessment, and any reconfiguring of a lot on flood-affected land is Code assessment across the board.
In practice, that means a granny flat proposal can stay in the Accepted category on a block where a duplex or a new lot on the same land would need a Code assessable application. It does not mean flood mapping is irrelevant: filling and building levels, access and any other overlay touching the parcel are still real questions, and Noosa applies a shire-wide protected-vegetation clearing control read per lot rather than assumed clear. It means the flood overlay specifically does not lift the secondary dwelling out of the Accepted category the way it can for other uses. Exact flood extent, filling requirements and building levels on a specific block are engineering and mapping questions a site-specific check reads against the parcel.
How to check your own block
- Confirm the zone. This page applies to Low Density Residential. If your lot is Medium or High Density Residential, the 65 m²/2-bed cap has not been separately confirmed for those zones in our fact set, and needs to be read directly rather than assumed to carry across.
- Check whether a secondary dwelling already exists on the site or a Building Unit Plan is registered over it. Either one closes off the Accepted pathway (AO5.1, AO5.2).
- Confirm the intended use is permanent occupancy. If short-term letting or a home-based business is part of the plan, the secondary dwelling pathway is not the Accepted route for it.
- Check the flood, biodiversity, waterway and any other overlay mapped onto the parcel. The dwelling house use is Accepted even on flood-affected land, but other overlays still add requirements a planner reads case by case.
This page is general information about the Noosa Shire planning scheme, not advice about your property. Overlay effects and flood mapping vary lot by lot, planning schemes amend, and the council's current scheme prevails. Do not rely on this page for a specific property. Get a site-specific report or independent professional advice before acting. We work with town planners, not in place of them: where a pathway depends on design or professional judgement, a town planner or the relevant qualified professional confirms it for your specific proposal.
Want the answer for your block? Our $690 site-specific report reads the zone, every overlay mapped on the property and the surviving development pathways for one property, with every figure cited to the scheme. Not ready for that? Start with the free development risk checklist, read our Noosa planning and zoning guide, or check whether your block can be subdivided instead.
Sources: Noosa Plan 2020 (the council's official ePlan), including the Low Density Residential Zone Code (6.3.1.3) and Table 6.3.1.3.1, the Low Density Residential Table of Assessment (5.5.1), the Flood Hazard Overlay Code and Table 5.9.6, and section 5.3.2 Categories of development and assessment. Everything on this page comes from the council's own published planning scheme; we explain it in plain English. The scheme text itself is the authority.
Published by LandIntel. How we research: our methodology.
Verified 3 to 7 July 2026 against the Noosa Plan 2020, Amendment 3 (effective 20 March 2026); schemes amend, and the live scheme prevails.