Balcony & Strata Concrete Repairs in Sydney
On a strata building the concrete is usually common property, the decision belongs to the owners corporation, and on a Class 2 building the work falls under the NSW registration scheme.
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What concrete cancer repair in Sydney actually involves
Most Sydney apartment blocks are Class 2 buildings, and remedial building work on a Class 2 building comes under the NSW Design and Building Practitioners scheme. In practice that means a registered design practitioner produces a regulated design for the work, and a registered building practitioner lodges it on the NSW Planning Portal before the work proceeds. It is a requirement on whoever carries out the job, and it is the main reason a strata repair takes longer to start than the same repair on a house.

How a strata repair actually proceeds
The money question is usually common property rather than cost. The structural slab of a balcony is generally common property even where one lot has exclusive use of it, which puts the repair with the owners corporation and funds it from the capital works fund or a special levy rather than from the owner. The boundary is set by each building’s own strata plan and by-laws, so it is established before the scope. The NSW Government’s common property memorandum lists balcony columns and railings, balcony ceilings and the original tiles with their waterproofing under the owners corporation’s responsibilities.
Access is the line that moves the number. Reaching a third-floor balcony safely means scaffold, a swing stage or rope access, and on a small repair the equipment can cost more than the concrete work. Where the scaffold or hoarding stands on the footpath, the council charges for the land it occupies, and each council’s schedule is different: the pricing page sets out two. It is also why scopes on older blocks are often written by elevation rather than by balcony, because once the access is standing, the other balconies on that elevation can share it.
What concrete cancer repair costs in Sydney
On a strata building the access equipment and, on a Class 2 building, the regulated design are separate lines from the repair itself. An owners corporation approving work valued at $30,000 or more must obtain at least two independent quotes, other than for emergency repairs, so lines that two quotes can be compared on help the committee.
The fees, thresholds and cost drivers that shape a quote are on the pricing page. A firm price comes from a site visit — call (02) 9072 0776 or use the quote form.
Concrete cancer repair costs and rules check
Balcony & Strata Concrete Repairs in Sydney — common questions
Does every owner have to agree?
The owners corporation decides, through the process its by-laws set out, and how the work is funded — capital works fund or special levy — is part of that decision. Your strata manager runs it; what a contractor supplies is the scope and the price it is decided on.
Can one balcony be done on its own?
Yes, and sometimes it is the right call — but check the cost of the access against doing the whole elevation while it is standing.
Does the owners corporation need a registered practitioner?
Yes, for remedial work on a Class 2 building. It is a requirement on whoever carries out the work, so it is worth confirming a contractor can meet it before a scope is priced.
Balcony & Strata Concrete Repairs by suburb
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