Three new bushfire compliance documents have landed in three months. The more useful signal is what is happening to AS 3959 itself.
Three new bushfire compliance documents have arrived in the space of three months, and the standard all three of them explain is currently being rewritten.
The Housing Industry Association published its Guide to Building in Bushfire Prone Areas on 24 July. Before that, in May, Standards Australia released two Bushfire Construction Handbooks, one written for practitioners and one for homeowners. The homeowner one is free.
For anyone working on or near designated bushfire prone land, that is a genuinely useful shelf of new reference material. It is also worth knowing what sits underneath it. Standards Australia has confirmed that a revision of AS 3959 has been through two rounds of public consultation and is now moving through the final stages of the standards development process.
So the guidance is new. The standard it explains is not, and it will not stay current indefinitely.
What is actually in the HIA guide
According to HIA, the guide covers the regulatory framework applying to design and construction in bushfire prone areas, how to apply the standard to common materials, upgrade guidance, and a summary of legislation and obligations in each state and territory.
The section most builders will get value from is the Bushfire Attack Level determination process. The guide steps through how to assess vegetation, measure distance to surrounding vegetation, calculate effective slope, and apply the relevant Fire Danger Index. It then breaks down construction requirements at each BAL rating, covering roofs, walls, windows, doors, subfloors and attached structures. HIA says it includes worked examples, quick reference tables and state by state legislative summaries.
Two things are worth flagging.
First, HIA is explicit that the guide must be read alongside AS 3959:2018, which remains the document that actually sets the minimum construction requirements adopted through the National Construction Code. The guide explains how to apply the standard. It does not remove the need to hold it.
Second, the pricing tells you who it is aimed at. HIA lists the guide at $45 for non members and $22.50 for members and subscribers. AS 3959:2018 itself is listed at $314 for non members. For a small operator picking up occasional work on bushfire prone blocks, that gap is not trivial.
What is a Bushfire Attack Level?
A Bushfire Attack Level, or BAL, is a site specific rating that measures the severity of potential bushfire exposure to a building. It is determined by the surrounding vegetation type, the distance between the vegetation and the building, the effective slope of the land, and the relevant Fire Danger Index. AS 3959 sets six levels: BAL Low, BAL 12.5, BAL 19, BAL 29, BAL 40 and BAL Flame Zone. The rating drives the construction requirements that apply across the whole building footprint.
The two Standards Australia handbooks
Both handbooks came out of technical committee FP-020, which covers construction in bushfire prone areas. HIA sits on that committee and says it was closely involved in developing them.
SA HB 208.1 is the Practitioner’s Handbook. It is written for people designing, constructing and maintaining homes in bushfire prone areas, and focuses primarily on Class 1 and Class 10 buildings, so houses and sheds. Standards Australia notes much of the guidance may still be useful across other building classes.
SA HB 208.2 is the Homeowner’s Handbook, and it is a free download. It covers reducing risk around the home, managing vegetation and landscaping, maintaining day to day preparedness through regular upkeep, and creating what Standards Australia calls a Property Bushfire Manual to guide ongoing care.
The maintenance point most builders will skim past
This is the part worth slowing down on.
Both handbooks are built around a proposition the industry has historically underweighted. A bushfire compliant home only performs the way it was designed to perform if it keeps being maintained that way.
Ember guards get painted over. Gutter guards fill with leaf litter. Subfloor screening gets cut open for a new service penetration and never properly reinstated. Landscaping matures right up against a wall that was specified on the assumption it would not. None of that is a construction defect. All of it degrades the performance the BAL rating was supposed to deliver.
The construction standard covers the day of handover. It does not cover year seven.
The construction standard covers the day of handover. It does not cover year seven.
For builders, that is not purely a homeowner problem. It is a handover opportunity. A free, nationally developed handbook that explains the maintenance logic behind the BAL rating you just built to is a legitimate addition to a handover pack. It costs nothing, it does work for you after you have left site, and it creates a record that the client was told how the building is meant to be looked after.
That is a small thing. Small things are usually what separates the builders who get called back from the ones who do not.
AS 3959 is being rewritten right now
The forward looking piece is the revision.
AS 3959 was last published in 2018, incorporating amendments in 2019 and 2020. Standards Australia has confirmed the current revision has completed two rounds of public consultation and is progressing through the final stages of the standards development process.
The question that matters is not when the revised standard publishes. It is when it becomes enforceable on your jobs.
AS 3959 is a referenced document in the National Construction Code, and the NCC only carries legal force once a state or territory adopts it. That system is currently more fragmented than usual. NCC 2025 was published on 1 May 2026. Victoria, the ACT and Western Australia moved on it. Queensland and New South Wales deferred adoption to 1 May 2027, and Tasmania has moved to pause NCC changes through state legislation.
So a revised AS 3959 will not land uniformly across the country. It will arrive in each jurisdiction on that jurisdiction’s timetable. Builders working across borders could realistically be pricing bushfire work against two different versions of the same standard in the same year.
None of that is a reason to wait for the dust to settle. It is a reason to treat the BAL number on a job as a live input rather than a settled fact, and to be deliberate about how long a quote stays open on bushfire prone land.
Victoria: a change that is already in your numbers
One change has already happened, and it has a direct cost effect.
Regulation 157 of the Victorian Building Regulations 2018 has been revoked, effective 1 May 2026. The revocation is recorded in the current in force consolidation of the regulations, made by S.R. No. 38/2026.
Regulation 157 required a relevant building surveyor to default a site assessed at BAL Low up to BAL 12.5 construction requirements. That default is gone. In Victoria, a site genuinely assessed as BAL Low can now be built to BAL Low.
On the right site, that is real money. Ember mesh, screening, decking specifications and glazing all carry cost at BAL 12.5 that a BAL Low site no longer automatically attracts.
Standards Australia has flagged that the new handbooks will be updated to reflect this Victorian change. Anyone working from the current edition in Victoria should read that section knowing the regulation has already moved.
What to actually do with this
If you build on bushfire prone land, three practical moves.
Put the free handbook in your handover pack. SA HB 208.2 costs nothing and does useful work for you long after practical completion.
Check whether your standing BAL assumptions still hold. Victoria’s BAL Low change is the obvious one. Bushfire prone area mapping reviews and planning scheme updates are the less obvious ones, and they can pull a previously unrated site into a higher band.
Watch two clocks, not one. The AS 3959 revision is one timeline. your state’s NCC adoption date is a separate one. The second is the clock that actually binds you.ecast.
Frequently asked questions
No. HIA is explicit that the guide must be read alongside AS 3959:2018, which remains the document setting the minimum construction requirements adopted through the National Construction Code. The guide explains how to apply the standard, including BAL determination and construction requirements by rating. It is a companion document, not a substitute.
HIA lists the guide at $45 for non members and $22.50 for members and subscribers. AS 3959:2018 itself is listed separately at $314 for non members and $289 for members and subscribers.
SA HB 208.2, the Homeowner’s Handbook, is available as a free download from Standards Australia. SA HB 208.1, the Practitioner’s Handbook, is a paid publication.
Not yet. AS 3959:2018 remains the current published edition, incorporating the 2019 and 2020 amendments. Standards Australia has confirmed a revision has completed two rounds of public consultation and is in the final stages of the standards development process. Once published, a revised standard would still need to be referenced by the NCC and adopted by each state or territory before it applies to your work.
Regulation 157 of the Building Regulations 2018 was revoked effective 1 May 2026. Relevant building surveyors are no longer required to default a site assessed at BAL Low up to BAL 12.5 construction requirements, so a BAL Low site can now be built to BAL Low.
They were developed by technical committee FP-020, which covers construction in bushfire prone areas. HIA holds a seat on that committee and says it was closely involved in the development of both handbooks.
The Good Builder Take
New guidance is welcome, and this looks like good guidance. But the useful signal here is not the guides themselves. It is the timing.
AS 3959 has been the settled reference point for eight years. It is now moving, at the same time as NCC adoption has fragmented across jurisdictions and Victoria has already changed how BAL Low sites get treated. Bushfire compliance is quietly shifting from a fixed site attribute into something that has to be checked again per job, per state, per year.
That is not a crisis. It is a change in how the work needs to be managed. The builders who get caught out will be the ones still quoting off a BAL assessment done three years ago.
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This article is intended for general information purposes only and does not constitute legal, financial, or professional advice. Laws, regulations, and industry requirements vary by state and territory and change over time. Builders and trades professionals should seek independent advice relevant to their specific circumstances before making business, legal, or financial decisions.
Author: TGB Editorial
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