Getting a BAL assessment before you buy

Most people find out their property's BAL rating after they have bought it, when the builder or council asks for a report. By then the number is what it is. A pre-purchase BAL assessment moves that step earlier, so the rating is part of your buying decision rather than a surprise afterwards.

Why it matters before you sign

Your BAL rating has a direct dollar impact in three places:

• Build cost. A block that sits at BAL-29 or BAL-40 can add tens of thousands to a new home compared with BAL-12.5. The difference between two blocks that look similar on a listing can be significant once you price the glazing, cladding and decking.
• Insurance. Insurers factor bushfire exposure into premiums, and rebuilding after a fire has to meet the BAL standard, which pushes up the sum you need to insure for.
• What you can actually build. At BAL-40 and BAL-FZ, approval is not guaranteed and the CFS may impose conditions on where and how you build. That is worth knowing before you fall in love with a floor plan.

What a pre-purchase assessment involves

The process is the same as a standard BAL assessment: we visit the site, classify the surrounding vegetation, measure setback distances and slope, and calculate the rating under AS 3959-2018. The difference is what you do with the result. Instead of submitting it to council, you use it to negotiate, budget, or walk away.

If there is no dwelling on the block yet, we can assess the likely building envelope, or run a couple of positions so you can see how much the rating changes depending on where the house sits.

Can you use the report later for council?

Sometimes. If you go on to build a new dwelling in the High overlay, the CFS will do its own assessment through the mandatory referral regardless, so the pre-purchase report is for your decision-making rather than for council. For projects that do not trigger a referral, often yes. If the building position and vegetation have not changed, the same report can support building rules consent. If you end up building somewhere different on the block, the assessment would need updating, because the rating is tied to the specific building footprint.

Is it worth it on every property?

No. If the block is in the Medium bushfire risk overlay, the Planning and Design Code deems it BAL-12.5 for planning purposes and council generally does not require a report, so a pre-purchase assessment adds less there, unless the block is within 100 metres of the High overlay, in which case a site assessment will be required anyway. It is worth it when the property is in the High bushfire hazard overlay, has forest or woodland close to the likely building position, or sits below vegetation on a slope. If you are not sure which category applies, send us the address and we will check the overlay for free before you spend anything.