Changes to BAMS BPN application fields 2026

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All fields related to Cost of Work (COW) will be updated in line with the new method for calculating the cost of the building work.
The ‘Number of Storeys’ field will be renamed to ‘Rise in Storeys’.
Three new fields will be introduced:
- Storeys Contained.
- Is the Builder an Architect
- Builder Email.
Necessity and condition updates to Certificate of Consent and Builder Registration fields.

Current field name	New field name – March 2026
Estimated Cost of Works For This Permit	Cost of Works For This Permit
Estimated Total Levy Amount	Total Levy Amount
Total Estimated Cost of Works	Total Project Cost of Works
Total Estimated COW - Class 2 to 8	Total Project COW - Class 2 to 8
Total Estimated COW - Class 1 or 9 or 10	Total Project COW - Class 1 or 9 or 10
Estimated Cost of Works for 1st reported BCA Class	Cost of Works for 1st reported BCA Class
Estimated Cost of Works for 2nd reported BCA Class	Cost of Works for 2nd reported BCA Class
Estimated Cost of Works for 3rd reported BCA Class	Cost of Works for 3rd reported BCA Class
Estimated Cost of Works for 4th reported BCA Class	Cost of Works for 4th reported BCA Class
Estimated Cost of Works for 5th reported BCA Class	Cost of Works for 5th reported BCA Class
Number of Storeys	Rise in Storeys

Note: There is no change to the necessity or conditions of these fields.

Storeys Contained
When applying for BPN or amending a permit, users may optionally include the 'Storeys Contained'. This field represents all storeys within the building, regardless of their position.
(This differs from the ‘Rise in Storeys’ field, which represents the number of storeys contributing to the building’s rise above ground level).
Is the Builder an Architect
When applying for BPN or amending a permit, users will be mandatorily required to nominate whether the builder is an architect. This supports BAMS in builder registration validation.
Builder Email
When applying for BPN or amending a permit, users may optionally include the builder’s email address. This supports BAMS in builder validation and matching.

Field Name	Changes – March 2026
Is Certificate of Consent Required?	This field is now only required if ‘Owner Builder Indicator’ field is ‘Y’.
Certificate of Consent Number	This field is now required if ‘Is Certificate of Consent Required is ‘Y’.
Builder Registration Number	Now required if: Regulation 268 Exemption does not apply and Owner is not the Builder and Cost of Works is greater than $10,000. or Regulation 268 Exemption does not apply and Owner is also the Builder and Cost of Works is greater than $16,000 and ‘BCA Classification 1 or 2 or 3 or 4 or 5’ equals ‘Building with 2 or more sole-occupancy units’.

Note: All changes are reflected in the BAMS Technical Specifications Spreadsheet on the BAMS web page.

Last updated 30 June 2026

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