A private bushfire shelter is a small, purpose-built structure on a bush property where people can take refuge if a fire arrives and leaving is no longer safe. It is a fallback for the worst moment of a fire, nothing more. It never replaces a bush fire survival plan or the decision to leave early.
What counts as a private bushfire shelter
The National Construction Code (NCC) treats a private bushfire shelter as its own building type: Class 10c. Class 10 covers non-habitable buildings like sheds and carports (10a) and fences, masts and pools (10b). The 10c label exists only for these shelters.
National guidance from the ABCB (Australian Building Codes Board) covers two forms, both built apart from the house:
- Above-ground shelters, usually heavy concrete or masonry rooms.
- In-ground shelters, set partly or fully below the surface.
Cellars and so-called safe rooms inside a dwelling fall outside that guidance, and the ABCB advises against relying on them as a refuge.
The job of a shelter is narrow. It has to keep the people inside alive while the fire front passes and nearby buildings and vegetation burn out, then let them get out safely.
A last resort, not a plan
This point matters more than any design detail. The RFS (NSW Rural Fire Service) says plainly that leaving early is always the safest option, and that every household should make a bush fire survival plan setting out when it will go, what it will take and how animals will be handled.
The ABCB standard backs this up. It warns against treating a shelter as a complete answer to bushfire risk, repeats the Victorian Bushfires Royal Commission warning that misplaced trust in a bunker can be life threatening, and states that meeting the standard cannot remove all risk. A NSW planning circular on shelters makes the same point: a shelter does not guarantee the safety of the people in it.
Think of a shelter the way the RFS describes Neighbourhood Safer Places. They are for when every other option in your plan can no longer be carried out safely, and they come with no guarantee.
Who might consider one
The ABCB describes the aim as giving a measured degree of protection to people with nowhere else to go. In practice, the households that look at shelters tend to be:
- on bush fire prone land, often in rural or remote areas;
- served by a single or long access road that could be cut or become dangerous;
- people who intend to leave early but want a fallback if a fire moves faster than expected.
The standard is not aimed at children, older people, people with disability, or anyone with breathing or heart conditions. It strongly recommends that these groups leave early, and the RFS gives the same advice for higher-risk household members.
Not sure whether your block is affected? Your planning certificate will say. Our guide to Reading your planning certificate before you design explains where to look.
What makes a shelter acceptable
For Class 10c buildings, the NCC sets a performance requirement: the shelter must provide survivable conditions for the people inside. There is no ready-made deemed-to-satisfy recipe, so every shelter needs a performance solution. That is usually a fire engineer's design showing how the shelter meets the requirement on your particular site.
In NSW, the RFS has advised that shelters must comply with the ABCB Performance Standard for Private Bushfire Shelters. That document deals with location, access from the house, how long people can stay inside, air quality, structure, signage and maintenance. A product sold as a bunker won't necessarily suit your property; the design has to work for your site and its fire exposure.
How CertifiBuild can help
We certify Class 1 and Class 10 work across NSW, including private bushfire shelters. We can review a shelter design early through plan assessment, issue the construction certificate once development consent is in place, act as principal certifier and handle the inspections. To start, request a quote with your site details and any engineering already done.
Local help across NSW
CertifiBuild certifies Class 1 and Class 10 work in 39 council areas. Local rules on these council pages are a good place to start: Northern Beaches Council, Penrith City Council, Wingecarribee Shire Council, Willoughby City Council, Lane Cove Council, Canterbury-Bankstown Council.
Suburb pages with local planning notes: Fairlight, Mulgoa, New Berrima, North Willoughby, Northwood, Orchard Hills, Picnic Point, Riverview, Roseville, Roseville Chase. You can also browse every service area.
Sources
- Private bushfire shelters performance standard, ABCB
- Part H7 ancillary provisions, NCC 2022 Volume Two, ABCB
- Prepare yourself and family, NSW RFS
- Building systems circular BS 10-008 on private bushfire shelters (PDF), NSW Department of Planning