Building in the Adelaide Hills bushfire zone

The Adelaide Hills is one of South Australia's most desirable places to build, but it is also one of the state's highest bushfire risk areas. If you are planning to build or renovate in the Adelaide Hills Council area, understanding the bushfire requirements early will save you time, money, and frustration with your development application.

The key fact: all Adelaide Hills land has bushfire requirements

Every property within the Adelaide Hills Council area must meet bushfire construction requirements. This is not limited to properties deep in the bush. Even blocks in more built-up areas within the council boundary are captured because the entire area falls within a designated bushfire-prone zone.

Properties in excluded areas still require bushfire-fighting facilities (such as water tanks and access for fire trucks) if they are within 500 metres of a high bushfire risk area.

When is a CFS referral required?

For properties within the Hazard (Bushfire — High Risk) overlay, development applications for new dwellings require a mandatory referral to the Country Fire Service (CFS), and some larger additions do as well. Smaller additions and alterations often do not; the threshold is set by the Planning and Design Code. The CFS has up to six weeks (30 business days) to assess the application, and their conditions are binding. This means the CFS has the power to impose specific requirements on your build, and those conditions must be met.

Where a referral applies, the CFS determines the BAL as part of that process and you pay the CFS fee. You do not need a separate private report for the same thing. Where the project does not trigger a referral, such as a smaller addition, an outbuilding, an alteration, or a site in the Medium overlay within 100 metres of a High area, a private assessment is what council needs. We check which applies before we quote, and we will tell you if the CFS is going to do it anyway.

What triggers a BAL assessment?

In the Adelaide Hills, the situations that come up most often:

• Building a new dwelling in the High overlay: the CFS does the BAL through the mandatory referral, not a private assessor
• Smaller additions and alterations in the High overlay that do not trigger a referral: private assessment
• Building a shed, carport or deck within 6 metres of a dwelling (it must match the dwelling's BAL rating): private assessment
• Responding to a Request for Information (RFI) from council, or a Medium-overlay site within 100 metres of a High area: private assessment

Understanding the overlay maps

The SA Planning and Design Code classifies land into different bushfire risk levels through overlay maps. In the Adelaide Hills, you will mainly encounter the Hazard (Bushfire — High Risk) overlay and the Hazard (Bushfire — Medium Risk) overlay. The high-risk overlay triggers more stringent requirements including the CFS referral.

You can check your property's overlay status on the South Australian Property and Planning Atlas (SAPPA). If you are not sure how to read the maps, send us your address and we will check for you at no cost.

Bushfire-fighting requirements

Beyond the BAL construction requirements, properties in bushfire-prone areas of the Adelaide Hills also need to comply with additional requirements under the Ministerial Building Standard MBS 008. These typically include:

• An appropriately sized water tank for firefighting (size depends on BAL rating and land size)
• A firefighting fitting accessible within 6 metres of a hardstand area
• Vehicle access and turnaround areas for fire trucks if the house is more than 60 metres from the public road

These requirements are in addition to, not instead of, the construction standards dictated by your BAL rating.

Common Adelaide Hills BAL scenarios

Based on our experience assessing properties across the Adelaide Hills, some common patterns emerge. Properties in Crafers, Stirling, and Aldgate often deal with forest and woodland vegetation on sloped terrain, which can push BAL ratings higher. Properties in more open areas of Mount Barker or around Hahndorf may have lower ratings depending on setbacks and vegetation type.

Slope is often the critical factor. A property that sits below forest vegetation on a downslope can receive a significantly higher BAL rating than an identical distance on flat ground. This is why accurate on-site assessment matters — the numbers can change substantially depending on the specific conditions of your block.

Getting your DA approved without delays

The most common cause of delays we see is homeowners lodging their DA without a BAL assessment. Council then issues an RFI, the assessment has to be organised, and the entire process stalls. The simplest way to avoid this:

1. Check the overlay before you start the design process
2. Find out whether your project triggers a CFS referral. If it does, the CFS sets the BAL. If it does not, get a private assessment early, before your DA is lodged
3. Build the BAL construction requirements into your design from the start, rather than retrofitting them later
4. Make sure your builder understands the specific requirements for your BAL rating

Before you start: talk to the duty planner

Adelaide Hills Council recommends contacting their Duty Planner on 8408 0400 before starting any development to check whether your proposal constitutes development and to understand the correct assessment pathway. This is free advice and can save you from heading down the wrong track.