SBEM Calculations

SBEM Calculations are used to demonstrate the energy performance of new and extended ‘non dwellings’ (that’s anything other than residential schemes).

IMG_3384Build Energy is vastly experienced in producing SBEM Calculations to meet Part L2 requirements.

Calculations are performed in-house by our energy assessors who are on hand to offer as much advice and guidance as you need throughout the process.

What are SBEM Calculations?

SBEM, ­or the Simplified Building Energy Model ­is a government approved methodology which can be used to calculate the energy required to heat, ventilate and light a building over a 12 month period when used under ‘normal” circumstances.

In commercial buildings compliance with Part L (England & Wales), Part F (Northern Ireland) and Section 6 (Scotland) is demonstrated using an SBEM Calculation. However it is worth noting that compliance can also be carried out in more sophisticated DSM (Dynamic Simulation Modelling) software.

IMG_3382 DSM performs a much more detailed and accurate assessment, allowing the assessor to analyse a 3D model of the building and simulate the effects of daylighting, overheating and sunlight for example.

Factors such as construction type­ including specific u-values for walls, roofs, floors and windows are all considered. The efficiency of heating systems, hot water and ventilation systems and other factors affecting energy consumption are all measured.

There are two stages to the assessment – design (required for permission to build) and ‘as built’ which is required for a completion certificate and EPC to be issued.

Why us for your SBEM Calculations?

Build Energy uses state-of-the-art software tools for checking building energy, carbon, lighting and comfort performance.Overheating Analysis1 Our process of building simulation allows us to rapidly compare the function and performance of building designs and deliver results on time.

The output of the report is a simple pass or fail. Our experienced assessors will work with you to provide the most practical solutions to achieve a pass while maintaining complete design flexibility.

BE can also take care of any extensions, conversions or change of use projects, where an SBEM Calculation would also be required.


Do you need SBEM calculations for a BREEAM Assessment? We can take care of the whole process including full assessment itself. Using SBEM modelling we can secure many of the credits for issues such as energy, thermal comfort, and daylighting.

Need to discuss SBEM Calculations?

Just give us a call on 01202 280062 or send us your enquiry - we’ll get straight back to you.


We used Build Energy as a central point for all of our SAP, EPC air and sound testing requirements as they offered everything under one roof......this made coordinating the various tests and assessments easy.

Ajmal Ayub – Director, Chance Ltd