Disability access in a heritage-listed building is usually achieved through a BCA performance solution, an alternative compliance pathway that demonstrates an equivalent accessibility outcome without altering protected historic fabric. Instead of widening a heritage doorway or removing an original threshold, the design is assessed directly against the NCC’s Performance Requirements.
What Counts as an Acceptable Alternative Solution on a Heritage Site?
An acceptable alternative typically achieves the same functional outcome through non-invasive or reversible methods, such as a removable ramp over an original step, a portable hoist for a short level change, or signage and staff assistance where a permanent physical change is not viable.
When documenting a performance solution, an access consultant must supply:
- Evidence the alternative delivers a safe, dignified level of access, not just a technical workaround
- Comparison against what the standard Deemed-to-Satisfy provision would have achieved
- Sign-off from a suitably qualified assessor, referencing the specific heritage constraint
Do You Need Heritage Approval as Well as a Performance Solution?
In most cases, yes. A performance solution satisfies the building surveyor that the NCC’s access requirements are met, but any physical change to a heritage-listed building or feature separately needs heritage approval from the relevant authority. The two approvals run in parallel, not one instead of the other.
When Is a Structural Change Unavoidable?
A structural change becomes unavoidable when no alternative method can deliver a safe outcome, such as a fire egress path that cannot be made safe any other way. In those cases, the performance solution shifts from justifying an alternative to justifying the minimum structural intervention needed.
What if the Heritage Authority and Building Surveyor Disagree?
Occasionally a heritage authority and a building surveyor will have different views on how far a design can go, particularly where a proposed ramp or lift shaft affects a protected element. In that situation, the access consultant’s role is to keep providing evidence for the least invasive option that still delivers access, so both authorities are assessing the same clearly documented alternative instead of two different proposals.
When Should the Access Assessment Start?
Starting the access assessment early alongside the heritage application usually saves the most time, because any conflict between the two sets of requirements can be resolved in the design stage.
Domatic Access prepares performance solution reports for heritage and adaptive re-use projects across Melbourne, Victoria, and the rest of Australia. Call 03 8375 9622 or email info@domaticaccess.com.au to discuss your site.
