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Scheme-specific evidenceNo rating award

BREEAM Score
Estimator

Compare a score produced by the applicable BREEAM assessment process with a verified target threshold, while keeping mandatory minimums and formal certification explicit.

Who it's for: sustainability consultants and architects comparing a BREEAM assessor's interim score with a project target at design development. Use only with: a registered project's exact scheme, version, assessment stage, assessor output, and current scheme guidance.

Assessment evidence
entered values only

How to use this calculator

1
Identify the exact scheme
Record the registered scheme, version, country scope, assessment type, and stage.
2
Use the assessment output
Enter a score calculated through the applicable BREEAM assessment process rather than recomputing category weightings here.
3
Verify the target threshold
Use the threshold and mandatory-minimum requirements that apply to the exact scheme and stage.
4
Keep the formal outcome separate
The worksheet reconciles entered evidence; the licensed assessment and certification process establishes the rating.

The formula

Score margin = entered assessor/export score − entered verified target threshold.

A nonnegative margin shows only that the entered score reaches the entered threshold. It does not satisfy mandatory minimums, validate credits or evidence, or award a rating.

Worked example

Example
An assessor export shows 72.0% and the project team enters a verified 70.0% threshold. The worksheet reports a +2.0-point score margin. If mandatory minimums are not confirmed, the target remains unresolved.

When this estimate will be off

  • Does not calculate category scores, credit achievement, weightings, innovation credits, or assessment-stage adjustments.
  • Does not select the applicable scheme, version, country, building scope, target threshold, minimum standards, or evidence requirements.
  • A score at or above an entered threshold is not a rating when mandatory minimums, prerequisites, or evidence remain unresolved.
  • The BREEAM manual is intended for trained, qualified, licensed assessors; non-assessors use it for reference only.

Frequently asked questions

A common mistake: Does not calculate category scores, credit achievement, weightings, innovation credits, or assessment-stage adjustments.

The applicable scoring method depends on the registered scheme, version, country scope, assessment type, project issues, innovation treatment, and current guidance. The official assessment process should calculate the score.

No. Mandatory minimum standards, prerequisites, evidence, assessor review, and certification remain separate requirements.

No. It records and compares project evidence supplied by the responsible assessment team.

Sources

This free BREEAM Score Estimator is built and maintained by DataDrivenAEC, using the relevant codes and standards. It does not substitute for professional judgment.