BAL BuddyBeta AS 3959:2018 Method 1

Indicative only. This is not a BAL report.

Guide and FAQs

Indicative BAL calculator from a map

Indicative only. This is not a BAL report.

BAL Buddy works out an indicative Bushfire Attack Level (BAL) for a building site in Australia. You find the site on a map, draw the building and the vegetation around it, and choose what kind of vegetation each patch is. BAL Buddy then applies Method 1 of AS 3959:2018, working out the slope under each patch of vegetation from elevation data and the distance from the building to it.

The result is an early, indicative answer to help you plan. It isn't a BAL assessment and doesn't replace one by an accredited bushfire practitioner. Your building surveyor or council decides which BAL applies to your building, and the mapping and elevation data BAL Buddy uses can be wrong or out of date, so check what you draw on site.

How it works

  1. Find the site. Search for the address or click the map.
  2. Draw the building and the vegetation. Trace the building's outline and each patch of vegetation near it, then classify each patch.
  3. Check the slope and see the result. The slope under each patch comes from elevation data. Press Complete to see the indicative BAL, how it was worked out, and how far the building would need to move for a lower level.

Questions people ask

Can I use the result for a building or planning permit?

No. Use it to understand your site and plan ahead. A permit application needs whatever your building surveyor or council asks for, which is usually a BAL assessment by an accredited bushfire practitioner.

Where does the slope come from?

From public elevation data, sampled under each patch of vegetation you draw. The data varies in detail from place to place, and the summary says which source was used and how fine it is.

What do I need to know about the vegetation?

Its type, judged mostly by its structure: how tall it is, how much of the ground its canopy covers and what grows underneath. The vegetation guide describes each class in plain words, with photos by region where available.

Does it work everywhere in Australia?

It applies the same national method to any site in Australia. Whether your land is in a mapped bushfire prone area, and what your state requires, are separate questions: check them with your council or the state's own maps.

What if my site is steep or unusual?

Very steep ground under the vegetation is outside the simplified method, and BAL Buddy says so instead of giving a result. Sites like that, and anything you're unsure about, need an accredited bushfire practitioner.

What does it cost?

You can try it free, then pay per run, buy a pack or subscribe. See the pricing page for current prices.

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