Can a quantity surveyor estimate construction costs for Division 43?
Published 26 June 2026 · Last updated 26 June 2026
Quick Answer
Yes, where actual construction costs are not available, a qualified quantity surveyor may estimate eligible construction costs for Division 43 capital works. This is one of the key reasons investors use a tax depreciation schedule.
Many investors do not know the original construction cost of their property.
This is common when:
The property was bought second-hand
The property was built years ago
Renovations were done by a previous owner
Invoices are missing
The property is part of a strata complex
The investor inherited the property
The property has changed use
A quantity surveyor can estimate eligible construction costs using:
Property inspection
Plans and drawings
Building type
Construction quality
Size and area
Age of works
Building cost data
Renovation evidence
Strata information
Photos and listing records
This can support Division 43 capital works claims and CGT cost base records.
Frequently Asked Questions
Why can't I just estimate it myself?
A qualified quantity surveyor provides a more supportable construction cost estimate.
Do I need original invoices?
They help, but if unavailable, a QS may estimate eligible costs.
Can previous owner works be estimated?
Yes, where there is enough evidence.
Does this help with CGT?
It may support capital works and cost base records.
Can Koste.ai organise this?
Yes. Koste.ai can collect the information needed for QS review.