Non-Domestic energy assessments are carried out using the government's Simplified Building Energy Model (SBEM). Far more information is required by the assessor, than with a residential house survey and so takes longer to compile and write up. The EPC is also accompanied by a recommendation summary with short, medium and long term payback measures that could be incorporated to improve the energy efficiency.
Assess Energy Solutions UK produce SBEM EPCs and reports using Design Builder 3D CAD software; used by leading design and architect companies to model new build commercial projects.