South Australia · Planning guide
Subdivision rules in SA
In South Australia dividing an allotment is development under the Planning, Development and Infrastructure Act 2016 and needs approval before it can proceed. The Planning and Design Code sets the minimum allotment area and frontage zone by zone, either as figures written into the zone, as in the General Neighbourhood Zone, or as a Minimum Site Area technical and numeric variation mapped to the land, as in the Suburban Neighbourhood Zone. A land division that meets the zone's deemed-to-satisfy criteria, including the cap on the number of new allotments, the slope limit and the regulated tree test, must be granted planning consent. Section 102(1)(c) then adds a separate land division consent covering the Code's requirements, water and sewer and any land vesting in council.
Sources read on 9 September 2026. Provisions are quoted word for word from the instrument.
Land division is development and needs approval
The Act defines development to include the division of an allotment, and section 101 says no development may be undertaken unless it is an approved development. So even a simple one into two split, or a community title over two existing units, goes through the PlanSA system.
A land division approval has more than one part. Section 102 requires planning consent against the Planning Rules, and for a division of land other than under the Community Titles Act 1996 or Strata Titles Act 1988 it also requires a land division consent that the Code's requirements are met, that design standards are met, that the water industry entity's requirements for water and sewer are satisfied, and that any land to be vested in council has the council's consent.
development means— (a) a change in the use of land; or (b) building work; or (c) the division of an allotment; or
Read the source · retrieved 9 September 2026
Subject to this Act, no development may be undertaken unless the development is an approved development.
Read the source · retrieved 9 September 2026
in relation to a proposed division of land (otherwise than under the Community Titles Act 1996 or the Strata Titles Act 1988)—the requirement that the following requirements be satisfied (or will be satisfied by the imposition of conditions under this Act): (i) requirements set out in the Planning and Design Code made for the purposes of this provision are satisfied; (ii) any relevant requirements set out in a design standard has been satisfied; (iii) the requirements of a water industry entity under the Water Industry Act 2012 identified under the regulations, and any requirements prescribed by the regulations, relating to the provision of water supply and sewerage services are satisfied;
Read the source · retrieved 9 September 2026
Minimum allotment sizes come from the zone
The Code does not have a statewide minimum lot size. Each zone sets its own site dimensions policy, and for land division the same figures apply to allotments as apply to dwelling sites. In the General Neighbourhood Zone the DTS/DPF 2.1 table gives a detached dwelling 300m2 and 9m of frontage, or 5m on a battle-axe site, a row dwelling 250m2 and 7m averaged, and a group dwelling or dwelling in a residential flat building an average of 300m2 with 15m total frontage.
Zones such as the Suburban Neighbourhood Zone instead state their DTS/DPF 2.1 site areas as a Minimum Site Area technical and numeric variation. The Code's Part 6 is an index of those variations, and the Suburban Neighbourhood Zone text lists dozens of alternative values that apply in different places. The rules of interpretation explain that a variation operates within parameters set by the Code and is applied spatially through the SA planning database, so the operative figure is whatever is mapped to your allotment.
Allotments/sites for residential purposes accord with the following: Dwelling Type Minimum site/allotment area per dwelling Minimum site/allotment frontage Detached dwelling (not in a terrace arrangement) 300m2 (exclusive of any battle-axe allotment 'handle') 9m where not on a battle-axe site 5m where on a battle-axe site Semi-detached dwelling 300m2 9m Row dwelling (or detached dwelling in a terrace arrangement) 250m2 7m (averaged) Group dwelling 300m2 (average, including common areas) 15m (total) Dwelling within a residential flat building 300m2 (average, including common areas) 15m (total)
Read the source · retrieved 9 September 2026
Allotments/sites for residential purposes accord with the following: (a) site areas (or allotment areas in the case of land division) are not less than the following (average site area per dwelling, including common areas, applies for group dwellings or dwellings within a residential flat building): Minimum Site Area. Part 6 - Index of Technical and Numeric Variations Part 6.1 Minimum Allotment Sizes Minimum Site Area
Read the source · retrieved 9 September 2026
Section 66(4) of the Act provides that the Code may include provisions that provide for the adaptation of the rules that apply in relation to a specified zone or subzone or as an overlay to provide for necessary and appropriate local variations in specified circumstances. The requirements specified or reflected in technical or numeric variations form part of the planning rules to apply to the assessment of development, as relevant, through the classification tables and other provisions that make reference to these matters in specified circumstances.
Read the source · retrieved 9 September 2026
The deemed-to-satisfy land division checklist
In the General Neighbourhood Zone, DTS/DPF 2.3 gives three ways for a land division to be deemed-to-satisfy. It can reflect boundaries already approved in an existing development authorisation for residential use. It can be lodged as a combined application with deemed-to-satisfy dwellings on the new allotments. Or it can meet a stand-alone checklist.
That checklist caps the division at 5 additional allotments, requires each allotment to have a minimum site area of 300m2 and frontage of 9m, a slope of less than 12.5%, no regulated trees on or within 20m of the land, no new public road, compliant vehicle access on one side of the allotment, no battle-axe configuration, and room for a rectangle 9m wide and 15m deep. The general Land Division policy in Part 4 repeats the first two routes for all zones.
A division that misses one item is performance assessed against PO 2.3 and the Land Division policy's performance outcomes, which cover allotment configuration, earthworks, interfaces, street frontage, infrastructure staging, watercourses and street patterns.
Land division results in sites that are accessible and suitable for their intended purpose. Division of land satisfies (a), (b) or (c): (a) reflects the site boundaries illustrated and approved in an existing development authorisation under the Development Act 1993 or Planning, Development and Infrastructure Act 2016 where the allotments are used or are proposed to be used solely for residential purposes (b) is proposed as part of a combined land division application with deemed-to-satisfy dwellings on the proposed allotments (c) satisfies all of the following: (i) No more than 5 additional allotments are created (ii) Each proposed allotment has a minimum site area of 300m2 and frontage of 9m (iii) Each proposed allotment has a slope less than 12.5% (1-in-8)
Read the source · retrieved 9 September 2026
(iv) There are no regulated trees on or within 20m of the subject land, with the distance measured from the base of the trunk of the tree (or the nearest trunk of the tree) to the subject land (v) The division does not involve creation of a public road (vi) Vehicle access from a public road can be provided to all proposed allotments which satisfies Design in Urban Areas DTS/DPF 23.3, 23.4 and 23.6, and would be located wholly on one side of the allotment, or located no more than 1m from the side boundary alignment (vii) No allotments are in a battle-axe configuration and (viii) Each proposed allotment is of a size and dimension capable of containing a rectangle 9m in width and 15m in depth.
Read the source · retrieved 9 September 2026
Land division: (a) creates allotments with the appropriate dimensions and shape for their intended use (b) allows efficient provision of new infrastructure and the optimum use of underutilised infrastructure (c) integrates and allocates adequate and suitable land for the preservation of site features of value, including significant vegetation, watercourses, water bodies and other environmental features (d) facilitates solar access through allotment orientation (e) creates a compact urban form that supports active travel, walkability and the use of public transport (f) avoids areas of high natural hazard risk. Land division creates allotments suitable for their intended use. Division of land satisfies (a) or (b): (a) reflects the site boundaries illustrated and approved in an operative or existing development authorisation for residential development under the Development Act 1993 or Planning, Development and Infrastructure Act 2016 where the allotments are used or are proposed to be used solely for residential purposes (b) is proposed as part of a combined land division application with deemed-to-satisfy dwellings on the proposed allotments.
Read the source · retrieved 9 September 2026
Dividing around an existing house
Where the existing house stays on one of the new allotments, the General Neighbourhood Zone's DTS/DPF 2.2 requires the balance of the allotment to meet the site area and frontage figures and the retained house to keep compliant private open space and car parking. This is the common reason a rear allotment fails deemed-to-satisfy: the front house is left with too small a yard or its parking is lost to the new driveway.
Where the site of a dwelling does not comprise an entire allotment: (a) the balance of the allotment accords with site area and frontage requirements specified in General Neighbourhood Zone DTS/DPF 2.1 and (b) if there is an existing dwelling on the allotment that will remain on the allotment after completion of the development, it will not contravene: (i) Private open space requirements specified in Design in Urban Areas Table 1 - Private Open Space (ii) off-street vehicular parking exists in accordance with the rate(s) specified in Transport, Access and Parking Table 1 - General Off-Street Car Parking Requirements or Table 2 - Off-Street Car Parking Requirements in Designated Areas to the nearest whole number.
Read the source · retrieved 9 September 2026
What is excluded and where divisions are restricted
The Regulations exclude some boundary changes from the definition of development, and the Code applies a Limited Land Division Overlay in some zones that restricts division. Which overlays apply is a spatial question answered through the SA planning database, and the rules of interpretation make overlays prevail over zone policy where they conflict.
A land division that meets the deemed-to-satisfy criteria must be granted planning consent under section 106 of the Act without public notification. One that does not is performance assessed under section 107 and can only be refused on merit if it is seriously at variance with the Code.
If there is an inconsistency between provisions in the relevant policies for a particular development, and for the purpose of section 66(3)(b) of the Act, the following rules will apply to the extent of any inconsistency between policies: (a) the provisions of an overlay will prevail over all other policies applying in the particular case; and (b) a subzone policy will prevail over a zone policy or a general development policy; and (c) a zone policy will prevail over a general development policy.
Read the source · retrieved 9 September 2026
Subject to subsection (1a), if a proposed development is classified as deemed-to-satisfy development, the development must be granted planning consent. A planning consent under this section must be granted without undertaking a process for public notification or submissions in relation to the proposed development.
Read the source · retrieved 9 September 2026
What changes council by council in South Australia
The state instruments set the frame. These points are set by each council's own instrument or mapping, so the answer for an address depends on which council it sits in.
- SA has no council planning schemes. The zone and any Minimum Site Area technical and numeric variation at the land are set by the Planning and Design Code and mapped spatially, so the minimum allotment size differs by zone and location rather than by council.
- Zones write the site area criterion differently: the General Neighbourhood Zone states figures in DTS/DPF 2.1, while zones such as the Suburban Neighbourhood Zone use a mapped Minimum Site Area variation indexed in Part 6.
- Subzones prevail over zone policy and can change allotment sizes or frontages within a zone.
- Overlays, including the Limited Land Division Overlay and the hazard, heritage and character overlays, prevail over the zone and can restrict or remove the deemed-to-satisfy pathway.
- The council is consulted on land vesting and is often the relevant authority for the planning consent, and its infrastructure and stormwater requirements can be imposed as conditions.
For your address
How the $150 report settles this for one site
A Casa preliminary planning report reads the Code zone, subzone, overlays and any mapped Minimum Site Area variation at your parcel from the SA planning database and applies that zone's site area, frontage and DTS/DPF 2.3 criteria to your allotment to show whether a division fits the deemed-to-satisfy pathway. It flags the overlays that restrict division at that address. The land division consent, water and sewer requirements and council conditions remain part of the application itself.
Common questions
What is the minimum lot size for subdivision in SA?
There is no statewide figure. The zone sets it. In the General Neighbourhood Zone the deemed-to-satisfy figure is 300m2 with 9m frontage for a detached dwelling allotment, and other zones use a Minimum Site Area technical and numeric variation mapped to the land.
Can I create a battle-axe lot in SA?
In the General Neighbourhood Zone the deemed-to-satisfy land division checklist requires that no allotments are in a battle-axe configuration, so a battle-axe division is performance assessed. The dwelling site table does allow a 5m frontage for a detached dwelling on a battle-axe site.
Do trees stop a subdivision?
A regulated tree on or within 20m of the land takes a General Neighbourhood Zone division out of the deemed-to-satisfy checklist. It does not prohibit the division, but the proposal is then performance assessed.
Is a land division approval the same as planning consent?
No. Section 102 of the Act requires planning consent against the Planning Rules and a separate land division consent that the Code's requirements, design standards, water and sewer requirements and any land vesting are satisfied, unless the division is under the Community Titles Act 1996 or Strata Titles Act 1988.
Will my neighbours be notified of a subdivision?
Not if it is deemed-to-satisfy, because section 106(3) requires consent without public notification. A performance assessed division is notified under section 107 unless the zone's notification table excludes it.
Sources read for this guide
- Planning, Development and Infrastructure Act 2016 (SA), version 30.7.2026read 9 September 2026
- Planning and Design Code (SA), Version 2026.15 (13 August 2026), State Planning Commissionread 9 September 2026
- Planning, Development and Infrastructure (General) Regulations 2017 (SA), version 13.8.2026read 9 September 2026
Not covered here
- Schedule 4 clause 3 of the General Regulations (land division exclusions from the definition of development) was located but not quoted, so the guide says only that some boundary changes are excluded.
- The Limited Land Division Overlay policy text was not extracted and is only named.
- Section 102(1)(c)(iv) to (v) (land vesting in council) is paraphrased and not quoted in full.
- Only the General Neighbourhood Zone and Suburban Neighbourhood Zone criteria were read. Rural and other zones set different allotment sizes that are not covered here.
- Planning and Design Code quotes were taken from Casa's cached copy of the plan.sa.gov.au PDF (Version 2026.15, sha256 ca767fce, fetched 2026-09-08 and re-read 2026-09-09). The Act and Regulations were fetched live from legislation.sa.gov.au on 2026-09-09.
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