This case study is an anonymised composite based on publicly reported PI claim patterns. It is not actual Apex client data and does not constitute legal or insurance advice. Names, locations and identifying details have been changed. Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority, FRN 724952.
A six-architect practice in a southern county town, fee income around £2.1m. A regional practice with strong relationships in the local authority and education-trust client base, undertaking school extensions, library refurbishments and smaller community projects on traditional JCT contracts with the practice acting as contract administrator and lead designer.
The project was the extension and partial refurbishment of a state-funded primary school, value approximately £2.8m, procured on a standard JCT Intermediate Building Contract with the firm as Contract Administrator. The practice undertook the design through to detailed design and provided contract administration through construction, including the issuing of architect’s instructions and the certification of interim payments.
The project ran broadly on programme through to the final third, when a series of late-stage variations was instructed. The variations arose from the school’s evolving operational requirements — adjustments to the safeguarding-related sightlines through the building, additional acoustic separation between teaching spaces, and a re-specification of the mechanical ventilation following late occupational health input from the trust.
The firm issued the variations as architect’s instructions to the contractor. The contractor priced them; the prices were accepted by the firm on behalf of the client; the works were carried out. The variations added approximately £340,000 to the contract sum.
The issue arose at financial close. The trust’s project manager identified that the firm had not, at any point in the variation process, obtained the trust’s prior written instruction or approval for the variations beyond a value threshold of £25,000 individually or £100,000 cumulatively, as required by the firm’s terms of appointment with the trust. The firm had acted under the assumption that the school’s site representative — a deputy head with day-to-day liaison responsibility — had authority to instruct, and on a reasonable construction of the day-to-day arrangements, this had not been the case.
The trust faced an unbudgeted overspend on the project that it had not internally approved or provided for. Internal audit and the trust’s funding body opened questions about the procurement and approval process.
The trust’s claim against the firm was framed as breach of the firm’s appointment — specifically, the breach of the contractual approval thresholds — and in the alternative as breach of the architect’s duty of care in the conduct of the contract administrator role. The principles in John Mowlem v Eagle Star Insurance Co and the line of cases on the architect-CA’s duty to act fairly and in accordance with the contract, were the framing. The point that engaged the dispute was the practical authority that the trust’s day-to-day representative had — or did not have — to instruct variations on behalf of the trust.
The trust did not seek to refuse the variations or to cause them to be removed; the building was in use. The pleaded loss was the unbudgeted spend, plus the trust’s costs of dealing with the procurement audit, plus an element for the management time and disruption.
Pleaded loss was approximately £375,000. The architect’s defence engaged the practical reasonableness of the firm’s reliance on the deputy head’s apparent authority, the trust’s contemporaneous knowledge of the variations through correspondence on which the trust’s CFO and head teacher had been copied, and questions about whether the trust had affirmed the variations by its own conduct.
Section 5 notification was made on receipt of the trust’s pre-action letter. The wording responded subject to the firm’s £25,000 excess. The £2m limit was comfortably sufficient.
A coverage question arose on the firm’s wording’s treatment of contractual penalties and liquidated damages. The trust’s claim included an element of additional financing cost; the wording’s typical exclusion of “any agreed sum or liquidated damages payable under the firm’s contract” was carefully considered. The financing cost element was characterised as a consequential loss of the breach rather than an agreed sum and the exclusion was not engaged.
A second question arose on the dishonesty exclusion. The trust’s pleadings carried no allegation of dishonesty against the architect; the matter was framed in negligence and breach. The exclusion was untroubled.
The matter resolved through mediation at approximately £165,000 inclusive of the trust’s costs, reflecting the trust’s partial knowledge and the practical reasonableness of the firm’s reliance on the deputy head’s apparent authority.
The settlement was paid. The firm undertook a structured review of its variation-approval protocols on all contract administrator appointments; a documented variation-approval matrix is now applied on every appointment, with thresholds, named approvers and a written-approval requirement for any individual or cumulative variation above threshold. The firm’s PI premium rose by approximately 24% at renewal.
Architect-CA claims are a slow-burning category but common. First, the variation-approval framework in the architect’s appointment should be reviewed at the start of every project with the named approvers explicitly identified to the firm and the contractor. Second, day-to-day client representatives often lack formal authority to instruct beyond a threshold — the practical reasonableness of accepting instructions from them does not displace the contractual approval framework. Third, the firm’s PI wording’s treatment of agreed sums, liquidated damages and consequential losses on the firm’s own contract should be carefully understood; these are areas where exclusion language varies and matters. Fourth, on substantial variation streams late in a project, the firm should consider whether a brief written briefing to the client at the level above the day-to-day representative is warranted, even where this might initially feel uncomfortable. Fifth, the renewal disclosure on CA appointments should engage with the firm’s CA workload and approach to variation management; this is a substantive part of the underwriter’s view of an architect’s risk profile.
For practices with meaningful contract administration work, we benchmark the firm’s PI wording specifically against the exclusions that affect CA risk — agreed sums, liquidated damages, consequential losses on the firm’s own contract — and identify the markets that handle these claims best. On notification, the careful framing of a CA dispute through the lens of professional negligence (covered) rather than breach of an underlying client contract requires care. At renewal, the firm’s revised variation-approval protocol and the documented approval matrix are the documents that build the underwriter’s confidence in the firm’s CA discipline.
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