Community-Scale Assessment With Mixed Land Uses
A 22-hectare brownfield site is being masterplanned under BREEAM Communities. The outline masterplan proposes 480 homes, a primary school, a local centre with retail, and a 3-hectare green corridor. The local planning authority has not yet adopted the masterplan, and the affordable housing tenure mix is still under negotiation (currently 20%, target 30%). The developer wants to certify at the outline stage to strengthen the planning application. Several credits depend on the final tenure mix, the school's travel plan, and the green corridor's management arrangements, none of which are fixed. The assessor is asked to assess against the current outline and 'assume' the target tenure mix and a school travel plan will be delivered.
1. Can the assessor assess against assumed future commitments?
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BREEAM Communities is designed to be applied iteratively through the masterplanning stages, but credits must be supported by evidence appropriate to the stage. The assessor should:
- Assess against what is evidenced in the current outline masterplan and planning documents, not against aspirational targets.
- For the tenure mix, use the currently agreed position (20%) unless a signed commitment to 30% exists; 'assuming' the target is not acceptable evidence.
- For the school travel plan and green corridor management, mark those credits as not yet demonstrated (or conditional) until the relevant documents exist.
- Record clearly which credits are achieved, which are provisional, and what evidence would be needed to confirm them.
This preserves the integrity of the certificate while allowing the developer to use the assessment to drive improvements.
2. The developer argues that certifying at outline stage with assumptions is normal practice. How should the assessor respond?
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Outline-stage assessment is legitimate, but it is not a licence to assume outcomes. The assessor should explain:
- BREEAM Communities rewards commitments that are documented and binding at the relevant stage (e.g. in the masterplan, design code, or planning conditions), not intentions.
- Where a credit depends on a future decision (tenure mix, travel plan, management body), it can be flagged as conditional and revisited at a later stage, but it should not be counted as achieved now.
- The certificate and any interim report must state the assessment stage and the basis of each credit.
The assessor's judgement is to distinguish 'committed and evidenced' from 'aspirational', and to document that distinction transparently.