Public liability insurance for NSW residential builders

What public liability insurance is

Public liability (PL) insurance covers third-party claims for personal injury or property damage caused by the builder's business activities. It is the policy that responds when a visitor is injured on site, when work damages a neighbour's property, or when something the builder did causes loss to a person or organisation other than the builder's own workers.

PL sits alongside contract works insurance, HBCF and workers compensation as the four common policies a NSW residential builder holds. Each covers a different category of risk. PL is the one for third-party claims.

What public liability covers

A typical residential builder PL policy covers legal liability arising from the builder's business activities for:

• Personal injury to a third party (a visitor, a delivery driver, a neighbour, a pedestrian) caused by the builder's negligence
• Damage to third-party property caused by the builder's negligence (an adjoining house damaged by a fallen scaffold; a neighbour's car damaged by debris)
• Legal defence costs incurred in defending the claim

The cover applies regardless of where the incident occurs (on the construction site, on a public footpath, in a council carpark) provided the loss arises from the builder's covered business activities.

What PL does not cover

Public liability is third-party only. It does not cover:

• Injury to the builder's own workers (workers compensation covers that)
• Damage to the works under construction (contract works insurance covers that)
• Damage to the builder's own tools, plant and property (contract works or asset insurance)
• Claims arising from defective workmanship or design that result in financial loss without third-party injury or property damage (professional indemnity covers some of this for registered practitioners)
• Pollution beyond a sudden and accidental event
• Asbestos liability beyond an incidental amount (subject to specific endorsement)
• Punitive or aggravated damages in many policy forms

Typical limits

Residential builders typically hold PL cover with a per-claim limit of:

• $10 million for most small to mid-size residential operations
• $20 million for larger volume builders, projects above $5 million in contract value or where principals or financiers require it
• Higher limits for specific projects on request

The limit applies per claim. The aggregate annual limit (the total payable across all claims in the policy year) is typically a higher multiple of the per-claim limit but should be checked on the policy schedule for the specific policy.

When public liability is required

Three pressures drive the PL requirement.

Standard residential contracts (HIA and Master Builders NSW forms) require the builder to hold PL insurance for the duration of the contract, typically at a $10 million or $20 million per-claim minimum. The builder must provide a certificate of currency before work commences.

Many NSW councils require PL evidence as part of issuing a construction certificate or for site access permits where the building site touches the public footpath. The required minimum varies by council but $10 million is common.

Principal contractor projects above the $250,000 WHS threshold often have PL requirements set by the WHS management plan, particularly for sites with significant public exposure such as roadside or footpath frontage.

Premium calculation

PL premium for a residential builder is typically calculated on:

• Annual turnover declared by the builder
• The nature of the work (residential general building, demolition, specialist trades)
• Claims history of the business
• The required limit of cover ($10M is cheaper than $20M)
• Any special endorsements (asbestos, working at heights, hot works extensions)

Premiums for small to mid-size residential builders typically sit in the range of a few thousand dollars per year at the $10M limit, scaling up with turnover.

Defective workmanship and the PL boundary

PL is not a substitute for warranty or defects rectification cover. If a defective tile falls in two years and damages a homeowner's furniture, the PL question turns on whether the homeowner has a third-party claim against the builder. Typically not, because the homeowner is a contractual party, not a third party. Most defective workmanship claims sit outside PL and inside HBCF, statutory warranties or the contract itself.

The exception is where defective work injures a third party (a visitor) or damages third-party property (a neighbour's car). Then PL responds.

Practical implications

Three habits keep PL cover useful.

Match the limit to the project. A $400,000 renovation in a busy Sydney street with multiple neighbouring properties carries different exposure from a $200,000 build on a regional acre block. Increase the limit where the project warrants.

Notify claims promptly. Almost all PL policies require the insured to notify any potential claim as soon as the builder becomes aware of it. Late notification is a common reason for claim denial. If a visitor falls and walks away saying they are fine, notify anyway.

Read the endorsements. Standard PL policies have several endorsements that materially affect cover, including asbestos exclusions, working at heights limits, hot works exclusions and pollution carve-outs. A builder doing asbestos removal or hot works needs to confirm those activities are within the cover, not excluded.

Related entries

Contract works insurance covered in the contract-works-insurance-residential-builders entry covers damage to the works themselves. HBCF in the hbcf-insurance-requirements entry covers consumer protection for builder default. Workers compensation in the workers-compensation-residential-builders entry covers injuries to the builder's own workers. The four policies are commonly held together; PL is the third-party slice.