BREEAM New Construction: Scheme Structure and Assessment Mechanics
BREEAM New Construction assesses the design and delivery of new buildings across technical categories such as Energy, Health and Wellbeing, Materials, Water, Land Use and Ecology, Pollution, Transport, Waste, and Management. Candidates must understand the two-part scoring model: credits are awarded within categories, then category scores are calculated as the percentage of credits achieved against credits available, weighted by category, and finally combined into a single overall score that maps to a rating band (Pass, Good, Very Good, Excellent, Outstanding).
Key mechanics to master: weightings differ by building type (offices, residential, schools, etc.), so the same credit set produces different overall scores. Minimum standards (mandatory credit thresholds) apply at rating levels - for example, certain Energy and Water credits must be achieved to reach Very Good or above. Questions often test that a high overall score alone does not guarantee a rating if minimum standards are missed.
Traps: confusing credits available in a category with the weighted category score; assuming all credits are equally valuable across building types; and forgetting that exemplary-level performance can earn additional innovation credits. Also watch for the distinction between the design-stage certification and the post-construction review.
Rule of thumb: compute the weighted contribution of each category first (category score × category weighting), sum them, then check minimum standards before announcing the rating. A project scoring 60% overall but failing a mandatory Water credit may be capped below its apparent band.