Level 3
Simpler commercial buildings: small offices, retail units, warehouses without complex HVAC. Standard SBEM software.
Greens Surveyors provides Level 3, 4 and 5 SBEM assessments for non-domestic new builds, extensions and changes of use across the UK. Fast, accurate and fully accredited.


SBEM (Simplified Building Energy Model) is the UK Government's methodology for assessing the energy performance of non-domestic (commercial) buildings. It is used to demonstrate compliance with Part L2a (new non-domestic buildings) and Part L2b (existing non-domestic buildings) of the Building Regulations 2010. The calculation models your building's heating, cooling, lighting, hot water and ventilation systems against a 'notional' benchmark building. Your design must achieve a Target CO₂ Emission Rate (TER) and Target Primary Energy Rate (TPER) that meets or beats the notional model.
SBEM assessments must be submitted at design stage and post-construction. Greens Surveyors handles both, minimising the risk of late-stage redesigns.
Simpler commercial buildings: small offices, retail units, warehouses without complex HVAC. Standard SBEM software.
More complex buildings with air conditioning, mechanical ventilation or central heating zones. Offices, hotels, large retail. Most modern commercial developments.
Unconventional buildings — large atriums, curtain walling, complex renewable integrations. Requires Dynamic Simulation Modelling (DSM).
Join thousands of developers and architects who trust Greens Surveyors for precision environmental modelling.