Construction sites that sit adjacent to third-party property, whether residential neighbours, commercial premises or public infrastructure, carry specific insurance considerations that inland or greenfield sites do not. Scaffold that overhangs, ties to, or works adjacent to third-party structures creates liability exposures that need to be understood and covered before mobilisation.
Specific third-party exposure risks on adjacent property sites
The specific issues include physical damage to the adjacent property from scaffold contact or from dropped materials, damage from vibration or movement transmitted through the ground or through tied connections, ingress of water or debris into the adjacent property from work above, and consequential loss (business interruption, tenant displacement) resulting from any of the above.
Standard public liability insurance held by scaffold contractors typically covers physical damage claims within limits that vary by policy. Where the adjacent property is high value or where consequential loss exposure is significant, the standard cover may be inadequate. Enhanced cover or project-specific insurance can be arranged where the exposure justifies it.
For developers and principal contractors, the specific question at tender stage is what the scaffold contractor's public liability cover level is and whether it is adequate for the site's specific exposure profile. A contractor with ten million pounds of cover working next to a fifty million pound heritage building is under-insured for that site regardless of how good their general safety record is.
Enhanced public liability arrangements
Globe Cambridge's insurance arrangements include enhanced public liability cover for sites with meaningful third-party exposure, arranged either as standing cover or on a project basis depending on the site. The cover level is documented in the pre-start documentation and confirmed with the principal contractor before scaffold erection begins.
There is a specific consideration around party wall arrangements worth flagging. Where scaffold ties to a party wall shared with a neighbouring property, the Party Wall Act 1996 may apply and specific notices and agreements may be required with the neighbouring owner. These are legal requirements separate from insurance but interact with the insurance arrangements because a scaffold operating without proper party wall consent may compromise the insurance cover if a claim arises.
For urban infill and inner-city sites, the party wall considerations often apply on multiple sides of the site. The scheme's legal advisor should be consulted at design stage to identify which walls require party wall notices, and the scaffold design should be finalised in light of any restrictions that flow from the party wall process.
Access for third-party inspection during scaffold works
There is also a specific issue around access for third-party inspection worth mentioning. Some neighbouring property owners request permission to inspect their side of the party wall or their property during and after scaffold works to document any changes or damage. Where these requests are anticipated at pre-start, the arrangements are straightforward. Where they emerge mid-programme, they can produce access disputes.
For QSs pricing scaffold on sites with significant third-party exposure, the specific line items to consider include enhanced public liability cover, party wall notice and agreement costs, third-party property surveys before and after works, and any specific protection measures required by neighbouring owners or by the local planning authority.
For developers, the practical implication is that adjacent-property scaffold pricing is not directly comparable to greenfield scaffold pricing. Attempting to negotiate the rate down to greenfield levels without addressing the additional exposure produces a contractor who has priced for exposure they are not adequately covered for. When something goes wrong, the developer's liability position is worse than it should be.
Talk to Globe Cambridge
To discuss insurance arrangements for scaffold on your third-party adjacent site on your scheme, contact Globe Cambridge on 01223 890727 or email enquiries@theglobegroup.co.uk.
