BAL Assessments | Bushfire Attack Level (BAL) Reports for Perth & Surrounding Areas
A BAL Assessment is required for new builds, renovations, home businesses and outbuildings located within a designated Bushfire Prone Area. At Engineering On Demand, we provide fast, council-ready BAL reports tailored for Perth Metro and selected South-West regions.
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What Is a BAL Assessment?
A BAL Assessment (Bushfire Attack Level Assessment) evaluates the potential bushfire risk to your property by assessing:
Surrounding vegetation & fuel load
Distance to vegetation
Slope and terrain
On-site conditions
The result determines your BAL Rating, which specifies the construction requirements for your project.
Learn more about bushfire-prone land from DFES here:
https://www.dfes.wa.gov.au/hazard-information/bushfire
Common projects requiring a BAL Assessment:
✔ New homes
✔ Renovations & extensions
✔ Sheds, granny flats & outbuildings within 6m of a dwelling
✔ Home business change-of-use
✔ Commercial use of a residential lot
✔ Planning approval & building permits
What’s Included in Your BAL Report
1. Site Information
Property address & legal description
Lot boundaries & dimensions
Existing structures
Slope & terrain details
Site photos
2. Vegetation Assessment
AS 3959 vegetation classification
Distance to vegetation
Exclusion clauses
Managed vs unmanaged vegetation commentary
3. Slope Assessment
Slope under classified vegetation
Surrounding slope within 100m
Contour references where available
4. BAL Determination
- Full AS 3959 methodology
- BAL rating (BAL-LOW → BAL-FZ)
- Mitigation measures if required
5. Maps & Appendices
Aerial map
Vegetation classification map
Slope/contour information
Distance measurement diagrams
Site photos
BAL calculation table
Our Service Areas
We provide BAL Assessments across:
✔ Perth Metropolitan Region
✔ Limited South-West areas
(Bunbury, Busselton, Dunsborough, Margaret River — contact us for availability)
If your property is outside these areas, contact us to confirm if we can attend.
Optional Add-On Services
(Quoted case-by-case depending on LGA requirements)
Bushfire Management Statement (BMS)
A concise A3 document addressing the Bushfire Protection Criteria.
Required by some LGAs including Mundaring, Swan, and Armadale.
More details here:
https://www.wa.gov.au/government/document-collections/bushfire-protection-guidelines
Bushfire Management Plans (BMP)
For more complex developments and planning applications including:
APZ design
Driveway & access compliance
Water supply & hydrant requirements
Ongoing maintenance responsibilities
Bushfire Hazard Level (BHL) Assessment
A pre-development bushfire risk assessment used when lot layout is not known.
Helps identify constraints and shape subdivision design.
BMP BAL Contour Map
Shows indicative BAL ratings for different building envelopes or proposed lots.
Used for:
Subdivisions
Large sites
Planning siting decisions
Relocating structures out of BAL-40 or BAL-FZ zones
Why Choose Engineering On Demand?
Fast turn-around times
Qualified assessors using AS 3959:2018 methodology
Council-ready documentation
WA-based team with local vegetation knowledge
Clear communication & practical advice
Access to additional bushfire-planning services
