Professional Indemnity Insurance for NSW Builders — DBP Act Requirements

Last updated 6 July 2026 — reflects the NSW Government’s latest extension of the PI exemption.

NSW is making professional indemnity insurance mandatory for registered building practitioners under the Design and Building Practitioners Act 2020 (DBP Act). The exemption that has delayed the requirement has now been extended for a third time and currently runs to 30 June 2027 — meaning registered building practitioners must hold adequate PI cover from 1 July 2027, unless a further extension is announced.

If you sign building compliance declarations on class 2 buildings (or mixed-use buildings with a class 2 part) in NSW, this applies to you. Silverback is a specialist construction insurance broker that arranges professional indemnity for builders and design and construct PI across Australia — and we recommend NSW builders get their PI position sorted well before the deadline. Here is why, and how.

What the DBP Act Actually Requires

The DBP Act requires registered building practitioners who provide building compliance declarations for regulated work to be “adequately insured” — holding a professional indemnity policy that, in the practitioner’s reasonable opinion, provides an adequate level of indemnity for the liability they could incur. There is no fixed dollar minimum in the legislation: you are required to form a defensible judgement about what is adequate for your project types, contract values and design exposure. That judgement is precisely where a construction-specialist broker earns their keep — an “adequate” limit for a $2M duplex builder looks nothing like adequate for a practitioner declaring class 2 remedial work.

Registered design practitioners and professional engineers under the Act already carry the PI obligation. The building practitioner exemption is the piece that has been repeatedly deferred — from 2023, then 2025, then 30 June 2026, and now 30 June 2027.

The Deadline Has Moved. Waiting Is Still the Wrong Move.

1. Your contracts already require it. Principals, developers and financiers on class 2 and remedial projects increasingly write PI requirements into contracts regardless of the statutory exemption. If your next tender specifies PI and you have never held it, you are arranging cover under deadline pressure — the most expensive way to buy insurance.

2. Retroactive dates reward early buyers. PI policies cover claims made during the policy period for work done after your retroactive date. Start cover in 2026 and by the time the mandate lands your policy already reaches back over a year of declared work. Wait until mid-2027 and your first policy starts with zero retroactive protection — the work you signed off this year would never be covered.

3. Capacity will tighten near the deadline. When thousands of NSW building practitioners seek PI in the same quarter, underwriters get selective and premiums firm. Builders with claims history, defect exposure or cladding-adjacent work risk landing in the hard to place end of the market at exactly the wrong time.

4. The DBP declaration itself is a design exposure. Signing a compliance declaration that designs comply with the Building Code of Australia is professional judgement — the exact liability PI exists for. Builders who amend designs, coordinate consultants or build under design and construct contracts are already carrying this exposure uninsured if they hold no PI today.

Get a NSW Builder PI Assessment →

Who Is Caught by the Requirement

• Registered building practitioners providing building compliance declarations on class 2 buildings and mixed-use buildings with a class 2 part
• Practitioners on remedial work — the DBP Act’s expansion to repair, alteration and renovation of existing class 3 and 9c buildings commenced 1 July 2026, widening who needs registration (and, from the deadline, PI)
• Builders taking design responsibility under D&C contracts — where standard PI wordings often exclude construction activity, and a design and construct PI structure is usually the right answer
• Design practitioners and professional engineers — already required to hold PI under the Act now

What “Adequate” PI Looks Like for a NSW Builder

When we assess adequacy with a builder we work through: contract values and the realistic worst-case design claim on your project types; whether your declarations cover your own design input or consultants novated to you; run-off — design claims commonly surface years after completion, so continuity of cover and your retroactive date matter more than the headline premium; exclusions that quietly gut a builder’s PI (construction activity, cladding, waterproofing); and how the PI limit interacts with your contract works and public liability program so claims cannot fall between policies. We document the reasoning — because “in the reasonable opinion of the practitioner” is a test you may one day have to evidence.

How Silverback Helps NSW Builders Get This Right

Silverback’s director spent years inside a leading Melbourne builder as a contract administrator before returning to broking — reading D&C contracts, compliance declarations and consultant deeds from the builder’s side of the table. We arrange builder PI and D&C PI with insurers who understand construction risk, structure retroactive dates and run-off properly, and put the adequacy reasoning in writing. And because we broker the full construction program, your PI is placed to work with your contract works, liability and NSW home warranty arrangements, not alongside them.

NSW Builder PI — Frequently Asked Questions

When does professional indemnity insurance become mandatory for NSW builders?

Under the current DBP Regulation, the exemption for registered building practitioners runs to 30 June 2027, making PI mandatory from 1 July 2027. The deadline has been extended three times, so check the current position with Building Commission NSW — and remember your contracts may require PI much sooner.

Is there a minimum amount of PI cover required?

No. The DBP Act requires cover that is adequate in the practitioner’s reasonable opinion for the liability they could incur. That makes the limit a documented professional judgement — we help builders form and evidence it.

I only build houses (class 1). Does this affect me?

The DBP Act’s PI requirement attaches to regulated work — primarily class 2 buildings, mixed-use buildings with a class 2 part, and now remedial work on class 3 and 9c buildings. Class 1 house builders are generally outside the DBP PI mandate, but PI can still be contractually required and is strongly worth considering where you take on any design responsibility.

Does my public liability or home warranty insurance cover design errors?

No. Public liability responds to third-party injury and property damage; home warranty protects homeowners if you cannot complete or rectify. Neither covers financial loss from defective design or a wrong compliance declaration — that is what professional indemnity is for.

What will PI cost a NSW builder?

Premiums vary with turnover, project types, design involvement, claims history and the limit chosen — there is no meaningful flat figure. Builders with clean histories buying ahead of the deadline will generally see better terms than late buyers in a crowded market. We can give you an indication quickly from your last financials and project profile.

What should I do now?

Get an assessment of your exposure and an indicative price well before 30 June 2027. If cover makes sense now (it usually does once contracts and retroactive dates are considered), you start protected; if not, you have a documented plan for when it will.

Speak to a Construction PI Specialist

Request a quote or call 0410 152 835 — Monday to Friday, 8:00am–5:00pm. Australia-wide, NSW builders a specialty.

Related Cover

• Professional Indemnity Insurance
• Design & Construct Insurance
• Home Warranty Insurance NSW (icare HBCF)

General advice only. Legislative requirements and dates are subject to change — confirm the current position with Building Commission NSW before relying on them. This information does not take into account your objectives, financial situation or needs. Silverback Insurance Pty Ltd (CAR 1283436 | ABN 74 643 561 746) is a Corporate Authorised Representative of Australian Broker Network Pty Ltd (AFSL 253131 | ABN 89 062 882 080).

Further reading: Professional indemnity for NSW builders: what the DBP Act requires

Related service: Subcontractor insurance management for builders