South Australia’s planning system is not like the eastern states’, and people who move here — or who last renovated before 2021 — routinely get it wrong. There is no local council development plan to read. There is a single statewide Planning and Design Code, a single online lodgement portal, and a two-consent structure that means “approval” is actually two separate decisions that combine into one.
This guide explains what needs approval in Adelaide in 2026, which pathway your project falls into, how long each takes, and where people most often come unstuck.
A related guide to consider while planning this work is Granny Flats in Adelaide: Rules, Costs and Rental Returns.
The Structure: Two Consents, One Approval
Under the Planning, Development and Infrastructure Act, most building work needs two things before it can start:
- Planning consent — assesses whether the development is appropriate for the site under the Planning and Design Code. Setbacks, site coverage, height, overshadowing, streetscape, heritage and character, private open space.
- Building consent — assesses whether the design complies with the National Construction Code and Australian Standards. Structure, footings, fire separation, energy efficiency, wet areas, waterproofing, glazing.
When both are granted, the relevant authority issues Development Approval. You cannot start work with only one of them. A common and expensive mistake is receiving planning consent, assuming that is the approval, and beginning demolition.
Everything goes through the PlanSA portal
All development applications in South Australia are lodged online through the PlanSA portal, regardless of which council the property is in. You upload the drawings and documents, pay the fees, and the system routes the application to the relevant authority. You can track the assessment status yourself, which removes most of the guesswork about where an application sits.
The Four Assessment Pathways
Which pathway your project falls into determines both the assessment time and the level of discretion the assessor has.
Accepted development
Development that meets specified criteria in the Code does not need planning consent at all. It may still need building consent. Typical examples in a residential zone include some minor outbuildings, certain fences, some verandahs and carports meeting size and setback criteria, and a range of minor works. The criteria are precise — a structure that exceeds the specified height, area or setback by any amount drops out of this pathway entirely.
Deemed-to-satisfy
If the proposal meets all the applicable deemed-to-satisfy criteria in the Code, planning consent must be granted. There is no discretion and no merit assessment. The statutory timeframe is 5 business days. This is the fastest and most certain route, and designing to hit it is often worth more than the extra floor area you would gain by not.
Performance assessed
Where the proposal does not meet one or more deemed-to-satisfy criteria, it is assessed on merit against the performance outcomes. The assessor has discretion, and the timeframe depends on what the application triggers:
- 20 business days where no public notification and no referral is required
- 50 business days where a referral to another agency is required
- 70 business days where public notification is required — the timeframe includes 15 business days for the notification period and 15 for the applicant to respond to any representations
Restricted development
Reserved for development the Code identifies as generally inappropriate in that zone. Public notification is mandatory, the statutory timeframe is 95 business days, and the decision sits with a council assessment panel or the State Commission Assessment Panel. Very few domestic renovations fall here, but a substantial second dwelling or a change of use can.
What Typically Does Not Need Planning Consent
Subject to the specific criteria in the Code and any overlays applying to your property, the following generally sit outside planning consent:
- Internal alterations that do not change the building’s external appearance or its use
- Replacing a kitchen, bathroom or laundry in the same location
- Repainting, re-roofing in a similar material, and general repair and maintenance
- Replacing windows in existing openings with similar windows
- Many small outbuildings, fences and shade structures within specified size and setback limits
- Solar panels on a residential roof in most circumstances
Every one of these can be caught by an overlay. A State Heritage Place, Local Heritage Place or Historic Area Overlay can bring even repainting or window replacement into the approval net. Check the property’s overlays before you assume anything.
What Always Needs Approval
- Any increase in floor area — extensions, additions, enclosing a verandah, converting a garage to habitable space
- Removing or altering load-bearing structure
- New or enlarged openings in external walls
- A second storey, or any change to the roof form
- Ancillary accommodation, commonly called a granny flat
- Carports and garages beyond the accepted-development criteria
- Decks and verandahs above specified heights or areas, or within setback zones
- Retaining walls above the specified height, which in most cases is a metre
- Swimming pools and spas, along with the required barrier
- Demolition on a State Heritage Place, Local Heritage Place, or a contributory item in a Historic Area Overlay
- Significant or regulated tree work
Overlays: The Thing That Changes Everything
Overlays sit on top of the zone and add their own policies. In metropolitan Adelaide the ones that most often catch renovators are:
Historic Area Overlay
Applies to areas with cohesive historic character — much of North Adelaide, Unley, Norwood, Prospect, Semaphore and parts of Port Adelaide. Around 11,810 contributory items sit within these areas statewide. Demolition of a contributory building is assessed against its historic characteristics, the contribution it makes to the streetscape, and whether it can be reasonably and economically restored. Alterations visible from the street are scrutinised closely: roof form, verandah detail, window proportions, materials and front fencing.
Character Area Overlay
Applies where an area has a consistent visual identity worth protecting but not the historic significance of a Historic Area. The key practical distinction is that demolition within a Character Area does not require planning approval, but a replacement dwelling is rigorously assessed to ensure the existing character is maintained or enhanced. That difference matters enormously if you are weighing a knockdown rebuild — it is covered in more depth in heritage and character controls in Adelaide.
Heritage Places
South Australia has roughly 2,300 State Heritage Places and 7,250 Local Heritage Places. Both are assessed for demolition against the building’s heritage values and its structural condition and safety risk. Alterations are assessed for their effect on the heritage significance, and internal work can be caught where the interior forms part of what is listed.
Other overlays worth checking
- Hazards (Bushfire) — much of the Adelaide Hills and the foothills fringe, triggering BAL assessment and construction requirements
- Hazards (Flooding) — parts of the western suburbs and along the creek lines, affecting floor levels
- Regulated and Significant Trees — applies to trees above specified trunk circumference, and to work within their drip line
- Airport Building Heights — near Adelaide and Parafield airports
- Noise and Air Emissions — along major roads and rail corridors, driving glazing and ventilation requirements
You can check which overlays apply to a specific address through the Planning and Design Code mapping tool on the PlanSA site. Do this before you make an offer on a property, not after.
Who Decides: Councils and Accredited Professionals
The relevant authority for your application may be:
- A council assessment manager — most straightforward residential applications
- A council assessment panel — performance-assessed applications that attract representations, and restricted development
- An accredited professional — a private certifier, who can issue building consent and, at certain accreditation levels, planning consent for deemed-to-satisfy and some performance-assessed development
- The State Planning Commission or SCAP — larger or state-significant proposals
Using an accredited professional for building consent is common and usually faster than going through council, because you are buying dedicated capacity rather than joining a queue. The assessment standard is identical; the Code is the Code regardless of who applies it. The cost is typically $1,500 to $4,000 for a domestic renovation, which is frequently repaid in program time.
Building Indemnity Insurance
For domestic building work that requires building consent, the builder must take out Building Indemnity Insurance. The threshold rose from $12,000 to $20,000 in November 2025, so work priced above $20,000 now triggers it. Key points:
- The certificate must be provided to you and to the council before building work commences
- Cover limits with the current insurers are up to $250,000, raised from $150,000 in late 2025
- Claims for defective work can generally be made up to five years after completion
- The insurance responds where the builder dies, disappears or becomes insolvent — it is not a general defects warranty you can call on because you are unhappy with the finish
- Owner-builders must obtain the insurance if they sell the property within the relevant period
A builder who is reluctant to produce the certificate before taking a deposit is telling you something important. Walk.
Fees and Timing
Development application fees in South Australia are set by regulation and calculated largely on the value of the development. For a typical Adelaide renovation and extension, budget $1,500 to $6,000 across lodgement, planning consent, building consent, the Construction Industry Training Fund levy on work above the threshold, and any referral fees.
A realistic approval program
- Design and documentation: 6 to 16 weeks depending on complexity
- Pre-lodgement checks — soil test, survey, engineering, energy rating: 2 to 4 weeks, largely in parallel
- Planning consent: 5 business days deemed-to-satisfy, 20 to 70 business days performance assessed
- Building consent: commonly 2 to 6 weeks through a private certifier, longer through council
- Building rules consent conditions and Development Approval issue: a few days once both consents are in place
Three to six months from starting design to holding Development Approval is normal for an extension. Anything caught by a heritage overlay or requiring public notification should be planned at six to nine months. The full picture, including construction, is set out in how long a renovation takes in Adelaide.
The Mistakes That Cost the Most
- Starting on planning consent alone. It is not approval. Building work without Development Approval can attract enforcement, and it will surface at sale.
- Not checking overlays before buying. A Historic Area Overlay on a property you intended to demolish is a fundamental problem, not a design constraint.
- Designing 200mm outside a deemed-to-satisfy criterion. Exceeding a setback or a wall height marginally moves you from a 5-business-day certain approval into a 20 to 70 business day merit assessment with a discretionary outcome. Very often the extra space is not worth it.
- Ignoring regulated trees. The one on the neighbouring property whose drip line covers your extension footprint is still a constraint on you.
- Assuming a verandah or deck is exempt. The accepted-development criteria have specific height, area and setback limits, and Adelaide’s older allotments frequently fail the setback test.
- Building to an approved drawing that the builder then varied on site. Any departure needs a variation to the consent. The certifier’s final inspection compares what is built with what was approved.
The system rewards preparation. Check the overlays, get the soil test, design to deemed-to-satisfy where you sensibly can, use a certifier who works in your council area regularly, and lodge a complete application. Applications that get delayed in South Australia are overwhelmingly the ones that arrive incomplete and then wait for the applicant.
Before you commit to a scheme, it is also worth reading home extensions in Adelaide and granny flats in Adelaide, both of which cover the approval traps specific to those project types.
Preparing an Application That Gets Assessed Quickly
The statutory timeframes in South Australia are generous by national standards, and applications that take months usually do so because they arrived incomplete and then waited on the applicant. What you lodge determines what happens next more than which council you are in.
A related guide to consider while planning this work is How to Renovate a House in Australia.
What a complete residential application contains
- Site plan to scale, showing boundaries, existing and proposed structures, setbacks dimensioned, site coverage calculated, private open space identified, and all trees with their trunk circumference
- Floor plans of existing and proposed, clearly distinguishing what is retained, demolished and new
- Elevations of every affected face, with materials and finishes annotated
- Sections where levels or ceiling heights are relevant
- Shadow diagrams where overshadowing is in issue, at the times the Code specifies
- Detail survey where levels matter
- Soil test and site classification
- Structural engineering for building consent
- Energy rating assessment where required
- Stormwater management showing where the water goes
- A written statement addressing the relevant deemed-to-satisfy criteria or performance outcomes point by point
The written statement is the most underused document
Most applicants submit drawings and leave the assessor to determine compliance. Writing a short statement that walks through each applicable criterion and shows how the proposal satisfies it does two things: it removes the assessor’s need to hunt for the information, and it frames the assessment on your terms. On a performance-assessed application it is the difference between a request for further information and a decision.
Working With Neighbours and Public Notification
Where an application requires public notification, the statutory timeframe extends to 70 business days and the outcome becomes materially less certain. Representations from neighbours are the most common cause of an Adelaide application being refused or heavily conditioned.
Before you lodge
- Talk to the adjoining owners first. Show them the plans, explain the shadow and overlooking effects honestly, and ask what concerns them. This costs nothing and defuses most objections.
- Address the predictable concerns in the design — screening to elevated windows, sill heights, setting a wall back from a boundary, planting to soften a blank elevation.
- Be honest about the construction disruption and give them a contact.
- Do not ask them to sign anything. A conversation builds goodwill; a document to sign creates suspicion.
If representations are made
- You have 15 business days to respond, and a considered written response that addresses each point is worth preparing properly
- Offering a design amendment that resolves a specific concern is usually more effective than arguing the concern is unfounded
- Representors may be heard by the assessment panel; attend, and be brief and factual
- A refusal can be appealed, but the time and cost of doing so almost always exceeds the value of whatever was in dispute
The cheapest approvals in Adelaide belong to people who designed to deemed-to-satisfy and never triggered notification at all. The second cheapest belong to people who spoke to their neighbours before lodging.