SBEM is a recognised calculation route for many non-domestic buildings. It turns geometry, fabric and fixed building services into a standardised energy model used for applicable Part L compliance evidence. The most productive time to think about it is while choices can still be changed.
At design stage, test the specification
Provide current plans, elevations and sections, orientation, U-values, glazing, air permeability target and the proposed heating, cooling, ventilation, hot water and lighting systems. Include relevant renewable technology. A design-stage model can show whether the proposal is likely to meet the applicable performance target and where the specification needs work. It does not replace coordinated design decisions.
At as-built stage, record what was installed
The final calculation should reflect the completed building, not an earlier drawing revision. Changes to glazing, plant, controls or lighting must be captured. The BRUKL report is part of the evidence presented to building control. Keep product schedules and commissioning records accessible so the final model can be checked against the works.
Check the applicable regulation
Part L guidance has multiple editions and transitional provisions. The standard that applies can depend on the project's application and commencement dates, so ask building control and the assessor to confirm the route. An SBEM report is not simply a commercial EPC under another name. Explore our SBEM Calculations service with the project stage and documentation ready.