INSIGHT · RISK & FINANCIAL VISIBILITY

One gate before the occupation certificate.
Two securities.
About seven to eight years between them.

20 September 2026

There is a single moment in a NSW apartment project when a developer has to hand something over to the state before an occupation certificate can be issued. What gets handed over is a choice between two instruments. They satisfy the same gate, but not the same duration - and the gap between their published durations is approximately seven to eight years. Which one was chosen sets how long that project's defect evidence has to stay retrievable.

Rows of archive drawers in a records room, holding documents kept for the long term

Analysed 20 September 2026 · Fair Trading and Building Amendment Act 2026 assented 14 August 2026 and commenced 20 August 2026 · Building Commission NSW DLI page last updated 28 August 2026 · all pages read 20 September 2026.

Key takeaways

Two instruments, one gate: Building Commission NSW describes decennial liability insurance as an alternative, not an addition: obtaining a DLI policy in a form acceptable to the Secretary is an alternative to taking out a building bond. Both are provided by the developer before an occupation certificate is issued.
The durations are not comparable: The bond scheme runs its inspections at 15 to 18 months and 21 to 24 months measured from the occupation certificate, and places the bond's resolution 2 to 3 years after the building work was finished. DLI covers relevant defects of critical building elements in apartment buildings over 3 storeys for up to 10 years. The gap is approximately seven to eight years - an approximation, because the two endpoints are measured from differently-worded events.
The obligations surface at opposite ends of the programme: A developer choosing DLI must notify Building Commission NSW of their intention prior to commencing construction. The bond is lodged in the run-up to the occupation certificate application. One record begins before the first slab is poured; the other at the end of construction.
The identity of an instrument is a function of dates and versions, not of its name: Between August 2022 and 24 October 2024 the same insurer's near-identically named product was approved as an acceptable form of bond and was not decennial insurance within the meaning of the Act. DLI's scope was narrowed on 20 August 2026; the bond sits at 2% until a deferred increase currently published for 1 July 2028; and as at the DLI page's last update of 28 August 2026, one policy version is listed as confirmed acceptable.
We would treat the choice as a retention decision, not a financing one: The two instruments put a building's defect exposure on very different timescales. We would use the instrument and its published duration to set an operational evidence-retention target for the project - a system-design recommendation, not a statement of any statutory document-retention period.

The building bond

The Strata Building Bond and Inspections Scheme requires the developer - the glossary is explicit that it is the developer, not the builder - to give the Secretary a security before an occupation certificate is issued, at 2% of the total price paid or payable of all contracts for the building work.

Two wordings sit side by side across the scheme's own pages: the overview measures surrounding steps from the building work being finished, while Stage 3 and Stage 5 measure the inspections from the occupation certificate being issued. The pages do not reconcile the two, and we do not either.

A short instrument with a defined end: The scheme overview describes a building inspector appointed within 12 months of the building work being finished, and an indicative rectification period 18 to 21 months after the building work was finished. The bond is then paid or returned, which the overview places at 2 to 3 years after the building work was finished.
Two fixed inspections in between: The Stage 3 page states the interim inspection is carried out 15 to 18 months after the occupation certificate is issued, and that it cannot be performed earlier than 15 months. The Stage 5 page states the final inspection is carried out 21 to 24 months after the occupation certificate is issued.
The return is explicit: If no defects are identified, the overview states plainly that the bond is returned to the developer; where rectification costs less than the bond, the balance is returned to the developer.

Decennial liability insurance

Building Commission NSW describes DLI as an insurance product for residential strata apartment buildings over 3 storeys, and states that it enables owners corporations to have a relevant defect fixed up to ten years after an apartment building is first occupied. It is taken out by a developer prior to an occupation certificate being issued.

First resort, strict liability: The regulator describes the product as first resort, with fault not needing to be proven, and states that the policy attaches to the building, not the developer - in favour of the owners corporation, covering critical elements of common property such as the structure, fire safety systems and waterproofing.
The relationship to the bond is stated in one sentence: Obtaining a DLI policy in a form acceptable to the Secretary is an alternative to taking out a building bond. A developer needs one or the other, not both.

What changed in August 2026

The Fair Trading and Building Amendment Act 2026 received assent on 14 August 2026 and commenced on 20 August 2026. Building Commission NSW describes the effect as clarifying the intended scope of DLI.

The defect test is now documentary: Cover applies where non-compliance related defects - defects that are the result of non-compliance with the Building Code of Australia, Australian Standards, or approved building plans - cause or are likely to cause damage or risk of death or serious injury.
The market is thin, and the regulator says so: The Commission states it will work with various prospective DLI providers to help align their policies with the new legislative requirements. As at the page's last update of 28 August 2026, one policy version - Resilience Insurance's Latent Defects Insurance Policy, version LDI.9.5.NSW.C2 June 2026 - was listed as confirmed acceptable. We note that as a fact about market availability, not as a recommendation, and we have no view on the product.

Dates that moved

In an update published on 26 June 2026, Building Commission NSW listed four amendments to building regulations.

One announcement, three postponements and one deletion of an expiry date. Any system that stores these as fixed facts rather than as dates with a source and a read-date is storing something the regulator has already demonstrated it will rewrite.

What changed	As published
Design and Building Practitioners Act expansion to class 3 and 9c work	will now commence on 1 July 2028
Professional indemnity insurance exemption	extended by 12 months to 30 June 2027
Strata building bond percentage rate	defer the increase from 2% to 3% until 1 July 2028
Cladding exemption expiry date	continue to operate with no expiry period

The choice surfaces earlier than the gate

Both instruments clear a gate at the occupation certificate, but the obligations do not appear at the same time - and that matters for who ever sees the decision. A developer choosing DLI must notify Building Commission NSW of their intention prior to commencing construction, through the NSW Planning Portal, attaching a certificate of currency setting out the issuer, the insured, the covered amount, the policy terms including the commencement date, and the premium deposit and its payment. For a DLI project the record exists - with a named issuer and a policy reference - before there is a building. For a bond project the security is assembled and lodged in the run-up to the occupation certificate application, at the other end of the construction programme. One portfolio can therefore hold projects whose security record was created years apart in the lifecycle, by different people, filed in different places. A system that only looks for the security at handover will never see the DLI notice: it happened before construction started, in a planning portal rather than a settlement pack.

A name is not an identity:
the same product, two date ranges.

One detail on the regulator's own page makes the record-keeping point better than any hypothetical could. Between August 2022 and 24 October 2024, the same insurer's product - Latent Defect Insurance, essentially the same name as the policy now listed - was approved as an acceptable form of bond under the SBBIS. The page states that during that window the product was not decennial insurance within the meaning of the Strata Schemes Management Act 2015, and that a developer who obtained it in that window can submit the policy as a form of building bond.

The title does not tell you which regime the project is under: A document titled Latent Defect Insurance, from the same insurer, is a building bond if obtained inside one date range and a ten-year decennial policy if obtained inside another. Only the combination of the instrument, its version and its date of obtaining does. A field that stores "we have LDI" without a date range has stored a word, not a fact.

Why the choice lands in your records,
not your balance sheet.

The natural way to read a bond-versus-insurance choice is as a financing question: two per cent of contract price tied up for two to three years, against a premium. That framing is not wrong, and it is not ours to advise on. It is also not where the operational consequence sits. Under the bond, the project has to survive a bounded, close-at-hand inspection sequence; under DLI, a relevant defect can be raised up to ten years after first occupation, and since 20 August 2026 the defects in scope are defined by reference to non-compliance with the Building Code of Australia, Australian Standards, or approved building plans - a documentary test. Answering it in year eight means producing, for one element of one building, which plans were approved, which standard was called up at which edition, what was actually installed, and what changed between consent and completion. Three things go wrong across that distance in ways they do not across two years.

Entity turnover: Projects are frequently run through project-specific entities. Across ten years, the entity that gave the security, the builder, the certifier, the consultants and the suppliers will not all still exist in the same form. The two instruments diverge here in a way the regulator states directly: the bond is returned to the developer, while the DLI policy attaches to the building, not the developer, in favour of the owners corporation. After a project entity is wound up, what remains outstanding, and against whom, is different under each instrument.
The applicable edition moves: The defect test refers to the Building Code of Australia and Australian Standards. Which edition applied is a function of when the project was approved, not of what is current when the claim arrives. Building Commission NSW currently records that the current edition for NSW is NCC 2022 Amendment 2, effective 29 July 2025, and that NSW adopts NCC 2025 on 1 May 2027. A ten-year window will therefore span several editions. A record that stores "complies with the NCC" without storing which edition has stored an assertion that cannot be re-tested later.
Nobody owns the field: The choice between bond and DLI is made once, by the developer. A DLI decision surfaces before construction begins; the bond decision lands immediately before the occupation certificate, at the exact point when a delivery team is winding down. In our experience, that choice is recorded in a finance ledger or a settlement checklist rather than in the project's document management - so the record retention horizon is set by a decision the people responsible for the records never see. For a group running several entities, a portfolio can easily contain buildings whose defect exposure closes at year three alongside buildings whose exposure closes at year ten, with no field anywhere that distinguishes them.

What we would put in a system

The useful output of this is small and concrete. For each completed strata project, we would test for four fields.

Where agents help here is narrow and worth stating precisely. A document intelligence agent can read a settlement pack or a planning-portal notice, extract the security type, the policy or bond reference, the version, the date obtained and the occupation certificate date, and draft the record - and a person confirms it. No agent decides whether a project is captured by the scheme, whether a policy is in a form acceptable to the Secretary, or whether a defect is a relevant defect. Those are determinations for the relevant authority, the insurer and your advisers.

Field	Why it is load-bearing
Which security was given	Bond or DLI, together with the date it was obtained - the same product name has already meant two different instruments in two different date ranges.
The date the occupation certificate was issued	Every timing in the bond process and the ten-year DLI window is measured from an event, and the scheme's own pages describe that event in two different wordings.
The document itself and its version	Held by the group rather than by the party that procured it.
The resulting evidence-retention target	Stated as a date, so the archive policy for that project is a consequence of the record rather than of a default. Derived from the instrument and its published duration; an operational design choice, not a statutory retention period.

Questions worth asking
of your own portfolio

For a developer: which security was given before the occupation certificate - and is it recorded anywhere other than the settlement file?

That is the single field the whole article points to. If the answer lives only in a settlement checklist, the retention horizon for that building was set by a decision the people managing the records never saw.

For a multi-entity group: which buildings' defect exposure closes at around year three, and which runs to year ten?

The question is not whether the answer is knowable - it is - but what field you would query to get it. If no field distinguishes the two instruments, the answer has to be reconstructed project by project from settlement documents.

For group finance: after a project entity is wound up, which residual obligations follow the entity and which follow the building?

The regulator's descriptions of the two instruments give different answers: the bond is returned to the developer, while the DLI policy attaches to the building, not the developer, in favour of the owners corporation.

For a project or development manager: if a compliance question arrives in year eight, can you produce which plans were approved, which standard applied and at which edition, and what was actually installed?

That is a documentary test against a nominated element of a nominated building. Whether it can be answered in year eight depends on what was stored in year one, and by whom.

For anyone storing the 1 July 2028 bond percentage change as a fact: is it stored as a date with a source and a read-date, or as a constant?

That date has already been moved once. A constant is a decision the regulator has already demonstrated it will rewrite; a dated record with a source is not.

What this analysis
does and does not show.

Evidence note

What it shows: That two instruments clear the same occupation-certificate gate on very different published durations - the bond resolved 2 to 3 years after the building work was finished against DLI covering relevant defects up to 10 years after first occupation - and that the instrument chosen sets how long a project's defect evidence has to stay retrievable. All facts are as read on 20 September 2026 from Building Commission NSW and NSW Government pages.
Key facts quoted: Bond at 2% of total contract price; Stage 3 at 15 to 18 months and Stage 5 at 21 to 24 months after the occupation certificate; DLI up to 10 years after first occupation; DLI scope narrowed 20 August 2026 to non-compliance with the BCA, Australian Standards or approved plans; bond increase from 2% to 3% deferred to 1 July 2028; NCC 2022 Amendment 2 effective 29 July 2025; NSW adopts NCC 2025 on 1 May 2027; one policy version listed as acceptable as at 28 August 2026.

We did not read the legislation. Every statement is taken from pages published by Building Commission NSW and the NSW Government. We quote the regulator's description of the scheme and do not quote, paraphrase or characterise the words of the Act or the Regulation, including the instrument behind the June 2026 deferral of the bond percentage.
We did not establish the statutory storey threshold. "Over 3 storeys" is the regulator's description of DLI, not a statement of the bond scheme's application provision.
The two inspection anchors are worded differently across the scheme's own pages, and we did not resolve the difference against the legislation.
One acceptable policy is not the same as one available policy. We make no claim about cost or take-up, no cost comparison between a bond and a premium, and no statement about which instrument is more common or preferable.
This is one jurisdiction (NSW). Groups operating across states hold projects under several different defect and security regimes at once.
Nothing here is legal, financial or insurance advice, and it does not determine whether any defect is a relevant defect.

What to watch next

The only statements about the future in this article are the regulator's own published dates.

The DLI page itself: The count of acceptable policies is a snapshot dated 28 August 2026. If further policies are listed, the thin-market observation above needs rewriting, not renumbering.
1 May 2027: NSW adopts NCC 2025, per the industry-changes page read 20 September 2026. This is the scheduled edition change that makes "which edition applied" a live field in any ten-year window.
30 June 2027: The professional indemnity insurance exemption's current end date, which has already been extended once.
1 July 2028: The deferred commencement of the bond's move from 2% to 3%, and of the Design and Building Practitioners Act expansion to class 3 and 9c work. Both are published intentions from an announcement that moved three dates at once. If the increase lands on schedule, projects either side of that date within one portfolio sit under two different percentages - another field that needs a date attached.

Bring us one completed apartment project.

Tell us which security was given before the occupation certificate, who holds the document today, and where the defect evidence for that building is stored. We will show you what a ten-year retrieval request against that project would actually return.

This article is general information about published regulatory guidance. It is not legal, financial or insurance advice, it does not determine whether a particular project is captured, and it does not determine whether any defect is a relevant defect. All figures and quotations are as read on 20 September 2026 from the sources listed, and describe NSW only. The two inspection anchors are reported as the scheme's own pages word them, without reconciliation.

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Sources

Suggested citation: Building Commission NSW and NSW Government Strata Building Bond and Inspections Scheme pages, as read 20 September 2026. The Stage 3, Stage 5 and glossary pages did not display a last-updated date to us. Only one figure is derived rather than quoted: the approximately seven-to-eight-year gap, stated as approximate because the two endpoints are measured from differently-worded events.

One gate before the occupation certificate. Two securities. About seven to eight years between them.