Latest version: v1.0, July 2026
Guidance Note 50 (GN50) describes the calculation methodologies that underpin the natural light issue (Hea 01) within BREEAM V7. Guidance is provided for methodologies relating to the daylight criteria and the evaluation of glare from daylight criteria. All the calculation methods outlined in the technical manual for these criteria are described in this guidance note.
View all Guidance Notes on BREEAM Projects (licensed assessors only)
15-Jul-2026 - Updated version released (v1.0)
