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Scoring and Rating BREEAM assessed buildings

There are a number of elements that determine the overall performance of a new construction project assessed using BREEAM, these are as follows:

  1. The BREEAM rating level benchmarks
  2. The minimum BREEAM standards
  3. The environmental section weightings
  4. The BREEAM assessment issues and credits

How these elements combine to produce a BREEAM rating is summarised on the following pages. This is followed by a description and example describing the methodology for calculating a rating.

The BREEAM rating benchmarks for new construction projects assessed using the 2011 version of BREEAM are as follows:

Table 1 BREEAM rating benchmarks

BREEAM Rating % score
OUTSTANDING 85
EXCELLENT 70
VERY GOOD 55
GOOD 45
PASS 30
UNCLASSIFIED < 30

The BREEAM rating benchmark levels enable a client or other stakeholder to compare an individual building’s performance with other BREEAM rated buildings and the typical sustainability performance of new non-domestic buildings in the UK.

In this respect each BREEAM rating level broadly represents performance equivalent to:

  1. Outstanding: Less than top 1% of UK new non-domestic buildings (innovator)
  2. Excellent: Top 10% of UK new non-domestic buildings (best practice)
  3. Very Good: Top 25% of UK new non-domestic buildings (advanced good practice)
  4. Good: Top 50% of UK new non-domestic buildings (intermediate good practice)
  5. Pass: Top 75% of UK new non-domestic buildings (standard good practice)

An unclassified BREEAM rating represents performance that is non-compliant with BREEAM, in terms of failing to meet either the BREEAM minimum standards of performance for key environmental issues or the overall threshold score required for formal BREEAM certification.

Minimum standards

Environmental section weightings

BREEAM assessment issues and credits

Calculating a building's BREEAM rating

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