Demolition Insurance and Liability: Public Liability, COIDA and Adjoining Property

Demolition carries more third-party risk than almost any other building trade, because the work generates falling material, vibration, dust and the removal of support from things that were relying on it. Two covers matter: public liability for damage to other people's property and injury to other people, and COIDA registration for injury to the contractor's own workers.

The covers and what each does

Verifying a contractor before appointment

1. Public liability policy. Ask for the schedule, not a certificate summary. Check the cover amount and the expiry date.
2. COIDA letter of good standing. Current, not expired. This is the document that matters most and the one least often asked for.
3. CIDB registration and grade, where the work requires it.
4. Demolition-specific experience, evidenced by comparable projects rather than by general building work.
5. Confirmation the policy covers demolition. Some general contractor policies exclude it or price it separately.

Adjoining property

Damage to a neighbour's property is the most common liability event on a suburban demolition, and it usually involves cracking attributed to vibration or water ingress through a newly exposed wall. Two controls reduce it to near zero: a dated photographic condition survey of adjoining structures before work starts, and weatherproofing exposed party walls within the same programme as the demolition rather than afterwards. See party wall demolition and notice and neighbours.

Lateral support

South African law recognises a right to lateral support between neighbouring properties. Removing support that a neighbour's land or structure depends on creates liability regardless of what a demolition permit authorises, and regardless of whether the work was carried out competently. Excavation near a boundary and demolition of a bracing structure are the two operations that engage it.

Where liability actually arises on a demolition

Claims on demolition sites are not random. Five situations account for almost all of them, and each has a control that costs very little compared with the claim.

The condition survey is the highest-value item on that list by a distance, because cracking in an adjoining older Cape Town wall is usually pre-existing and almost always blamed on the demolition once one starts next door.

Securing the site outside working hours

A part-demolished building is an attractive nuisance: it draws children, scrap collectors and shelter-seekers, and it contains unstable structure, open excavations and exposed reinforcement. Liability toward a trespasser on an unsecured demolition site is real, and it does not disappear because the person had no right to be there.

• Perimeter closed and secured at the end of every working day
• Open excavations covered or fenced, not just marked
• Partly demolished structure left in a stable state, never mid-collapse
• Plant immobilised and keys removed
• Ladders and scaffold access removed or boarded
• Salvaged metal secured or removed from site, since it is the main theft target

Contractor or general builder

Demolition is frequently taken on by a general builder with a hired excavator, and the insurance position is where that shows. Three checks separate a demolition contractor from a builder doing demolition, and all three are documentary.

1. Does the public liability policy name demolition? Some general contractor policies exclude it outright, and others price it separately. A policy that excludes demolition is worth nothing on a demolition site.
2. Is the COIDA letter of good standing current? Expired is the same as absent when someone is injured.
3. Is there demolition-specific experience? Evidenced by comparable projects, not by general building work. Demolition is a sequencing discipline, and a builder's instinct to work bottom-up is exactly wrong.

What to keep on file as the owner

The owner submitted the waste management plan and holds the permit, so the owner holds the evidence trail. Keep all of it: the contractor's public liability schedule and COIDA letter, the dated condition survey of neighbouring property, the written party wall agreement where one applies, service disconnection confirmations, disposal records and weighbridge tickets, and the completion confirmation. That file answers every question that can arise afterwards — from a neighbour, an insurer, a purchaser's conveyancer, or the City. See the demolition process.

The gap owners miss

An owner's property insurance covers the building. The contractor's public liability covers damage they cause to others. Neither automatically covers the site itself once the structure is gone, and neither covers the owner's liability toward a trespasser injured on an unsecured demolition site. Both gaps are closed by asking the insurer directly before work starts rather than assuming existing cover stretches.

Cover during the gap

There is a period between the structure coming down and whatever replaces it going up, and a vacant site is a different insurance proposition to either. Open excavations, stockpiled material and unrestricted access all carry liability, and standard property cover written for an occupied building does not necessarily follow the site into that state. The gap is short, the exposure is real, and the conversation with the insurer takes ten minutes.