Infrastructure Scheme Split Across Phases
A 6.5 km light-rail extension is being assessed under BREEAM Infrastructure. The scheme is procured in two construction contracts: Phase 1 (3.8 km, four stations) is at detailed design and due to start on site in three months; Phase 2 (2.7 km, three stations) is at outline design only, with funding not confirmed. The client wants a single BREEAM Infrastructure certificate covering the whole 6.5 km to support a funding bid. The assessor notes that several credits depend on construction-phase evidence (waste, materials, site impacts) that cannot exist for Phase 2, and that the Phase 2 alignment may yet change. The client argues that 'the scheme is one project' and asks the assessor to register and assess it as a single entity.
1. Should the assessor register the whole 6.5 km as one BREEAM Infrastructure assessment?
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The assessor should not register Phase 2 as if it were at the same maturity as Phase 1. BREEAM Infrastructure assessments are tied to a defined project boundary and to evidence appropriate to the stage of the project.
- The appropriate approach is to register Phase 1 as the assessed project (a coherent, design-defined boundary), and treat Phase 2 separately when its design and funding are sufficiently advanced.
- Alternatively, if the client insists on a single boundary, the assessor must be explicit that credits requiring construction-phase evidence can only be claimed for Phase 1, and Phase 2 credits are provisional/not achievable until design is fixed.
- The assessor documents the boundary decision and the rationale, and flags the risk that Phase 2 alignment changes could invalidate any provisional claims.
A single certificate covering unconfirmed Phase 2 work would overstate what has been demonstrated.
2. The client wants the certificate to support a funding bid. How does that affect the assessor's approach?
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The purpose of the certificate does not change the evidential standard. The assessor should:
- Explain that BREEAM Infrastructure ratings reflect demonstrated performance against the scheme's criteria at the assessed stage; they are not a marketing forecast.
- Offer a staged pathway: certify Phase 1 now on its design and (later) construction evidence, and register Phase 2 when its design is fixed.
- Ensure any pre-assessment or interim statement clearly distinguishes demonstrated credits from provisional ones, so the funding bid is not misled.
The professional duty is accuracy over client convenience; an inflated single certificate would misrepresent the scheme.