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Soil Testing

Bushfire Attack Level (BAL) Assessment

Determine the bushfire risk level of your site — and ensure your building plans comply with AS 3959 construction standards. STA offers Bushfire Attack Level (BAL) assessments across Queensland, helping you meet council requirements and avoid costly delays. We provide desktop assessments up to BAL 29 only. For higher ratings, we’ll refer you to a trusted specialist.

BAL assessments can be ordered directly alongside your soil test or foundation design — and are carried out by our qualified internal team using a nationally recognised method.

  • Assessment of vegetation, slope and site conditions
  • Using CSIRO-endorsed tools
  • BAL rating and documentation in accordance with AS 3959

Find out more in our detailed article on BAL Assessments.

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When is a BAL Assessment Required?

BAL assessments are often required by councils when a site is located near bushland, vegetation corridors, or within mapped bushfire-prone zones. These reports help determine the level of fire exposure and the corresponding construction standards needed to reduce risk.

You may require a BAL assessment:

  • For new dwellings in bushfire-prone areas
  • When extending or altering an existing home near vegetation
  • When subdividing or developing semi-rural land
  • As part of compliance with local planning overlays

Including a BAL assessment early in the process helps prevent approval delays and enables smarter design decisions from the outset.

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What’s included?

Our desktop BAL assessment service (up to BAL 29) includes:

  • Site classification based on vegetation, slope, and separation distances
  • BAL rating in accordance with AS 3959
  • Supporting documentation for council and certifier submission
  • Referral guidance if BAL 29 or higher is identified

Faster compliance

Avoid project delays with early-stage bushfire assessments, integrated into your soil test or foundation design workflow.

Clear next steps

Know where you stand — we’ll guide you forward or refer you to a bushfire consultant if your site rates  higher than BAL 29.

Trusted experience

Assessments conducted by qualified professionals using CSIRO methodology, and accepted by certifiers across Queensland.

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One engineer for all your needs

Every building project is different, requiring a combination of engineering disciplines. From bottom to top, our engineers can work on soil testing and foundations, all the way up to frame and roof truss design and even inspections. We believe these shouldn’t be thought of as separate, unrelated services.

Whether you’re renovating, extending, building a brand new home, or putting in a pool, you can gain significant benefits from understanding (in advance) the full range of engineering services you might need — and from using the same engineer for all these services.
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Key advantages of integrated services

STA is a one-stop engineer with a service range that delivers three key advantages:

  • Save time and money

Pre-planning your engineering needs means you won’t have to keep re-booking an engineer when you need a particular service. It creates efficiencies that cut service times and save you money by pulling together the services you’ll need, at a lower overall price.

  • Enjoy engineering continuity

With all your engineering done by a single organisation, your consultants tap into a deeper knowledge of the site and the project, which leads to high quality outcomes, with more opportunities for innovative solutions.

  • Less risk, more reliability

While STA always takes legal responsibility for its engineering designs, an up-front engineering services package makes it easier to trust our work with a strong mutual commitment, and reduced risk of potential interruption or delay.

How it works

Engineering consideration – We help you think about your project in engineering terms. What specific services might you need?
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Packaged plan – We develop a plan that packages up all the engineering services you need for your individual home or build project.
2
Prescheduled services – With each service pre-scheduled, we can work more closely with you over the life of the project.
3

Explore our engineering services

Whether you’re a builder, developer, architect or owner, STA has the size and range to cover every possibility, with a team of experts in every engineering specialty. Explore more specific info on:
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More on soil testing

With our own NATA accredited laboratory, we deliver faster and more accurate soil testing, site classification, site investigation, and geotechnical engineering results.
More about our soil testing
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