SBEM calculations for non-domestic projects

The Simplified Building Energy Model (SBEM) is a method for assessing the energy performance of many non-domestic buildings. It uses building geometry, fabric, lighting and building-services information. Depending on the project, the model can support building-regulations compliance and related non-domestic energy documentation.

A new or altered non-domestic building may need energy calculations to demonstrate compliance with the applicable building regulations. SBEM can compare the proposed and notional buildings and help identify specification gaps. The required method and outputs depend on the project, jurisdiction and regulatory route.

Start discussing the model while the design can still change, then update it when the design and as-built specification are known. Leaving the calculation until completion can expose missing evidence or performance shortfalls late in the project. Share the project stage and building-control requirements at the outset.

SBEM is project-based; it is not a certificate that renews every year or every ten years. A model may need design-stage, revised and as-built outputs as the project develops. A separate non-domestic EPC may be required at completion or for a later sale or letting.

Building control may be unable to confirm that the relevant energy-efficiency requirements have been met, which can delay sign-off and require design or construction changes. The consequences depend on the work and the regulations that apply. Establish the required calculations and evidence with the project team early.

There is no standard on-site survey for every SBEM commission. Modelling time depends on drawings, floor area, zoning, building services, design changes and the quality of specifications. We review the available information and agree deliverables and a timetable in a bespoke quote.

Send plans, building use, floor area, project stage and the current fabric and services specification. We can identify the appropriate modelling scope, explain missing inputs and prepare a tailored quote for design-stage or as-built SBEM calculations.