CALON provides independent pre-tender assurance for infrastructure owners, identifying the scope, commercial and design risks that experienced contractors will find once a project reaches market, while there is still time to act on them.
They fail because scope was unclear before tender, risk was misunderstood, design decisions created avoidable cost, or contractual obligations were never properly aligned. Before a tender is issued, these are corrections. Once a contractor is appointed, the same issues become variations, claims, delay and dispute, and the opportunity to prevent them has passed.
CALON exists to provide independent scrutiny at the point where clients still have choices, before a contractor is appointed and before those choices close.
CALON advises the organisations that commission infrastructure, never the contractors who build it. Our team sits on one side of the table only, the client side, and will not take work that places us in a delivery supply chain.
We know how contractors assess uncertainty, price risk and find weaknesses in tender information, because our team has done exactly that from the other side of the table. The practice is built around chartered, director-level professionals with decades of contractor-side delivery and framework-director experience across the public sector, energy, water and transport, applied on the client's side before a contractor is ever appointed.
CALON's engagement window sits at tender preparation, the last point before procurement where a client still has a free hand to fix what's wrong.
Everything after procurement, delivery, commissioning, closeout, is outside CALON's scope by design, not by omission, because that is also the point where a fix stops being a redraft and starts being a claim.
Four lenses, five maturity levels, three possible decisions. The same framework, applied consistently to every engagement.
Each review is scored against its relevant lens on the same five-level scale, from Absent at the outer edge to Robust at the centre. The bold ring marks Level 3, the minimum pass for every lens.
Every engagement is agreed against a defined scope and outcome before any work begins, and answers one question a contractor will ask anyway, before it costs you to find out the hard way.
Scope, specification, drawings and site information reviewed for gaps before tender.
From £3,000Contract particulars, scope and pricing documents checked for contradictions and risk transfer before the contract goes to market.
From £2,000Independent check that a consultant's design can actually be built efficiently as drawn.
From £3,500Expensive-to-build design elements identified, with cheaper equivalent solutions that preserve design intent.
From £2,500Local authorities, government bodies and publicly funded capital programmes, across transport, housing, regeneration and public-realm infrastructure, seeking assurance before procurement.
Asset owners preparing complex water and energy network investment for the market.
Teams responsible for major capital programmes requiring independent challenge before committing to delivery.
The boundary is the point. CALON never crosses from advising into delivering.
Every engagement follows the same process. Scope and fee agreed in writing before any work begins.
A short message is enough. Not sure which review fits? Take the free Project Confidence Check first, five questions, no sign-up, an instant recommendation. A member of the team will reply within one working day.
Or email enquiries@calon-infrastructure.co.uk