Part OPart O simplified methodGlazing limits, free areas, the London postcodes, and when a scheme needs TM59 modelling instead.Read the guide Part L2Why BRUKL reports failEmission and primary energy targets, limiting values, solar gains and air tests, with the usual fixes.Read the guide PlanningLondon Plan energy hierarchyBe lean, be clean, be green, be seen: the 35% on-site target, be lean targets and carbon offsetting.Read the guide SchoolsBB101 overheating criteriaThe 40-hour limit, the three TM52 criteria, the weather files and the DfE 2026 Technical Manual rules.Read the guide
If your project raises a question these guides don't answer, send us the drawings and we'll tell you which assessment it needs.
