SBEM Calculations

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

Build Energy is vastly experienced in producing SBEM Calculations to meet Part L2 requirements in the UK.

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 BE for your SBEM Calculations?

Build Energy uses leading edge 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 from the assessment is called a BRUKL report, which largely demonstrates how the building is performing against a carbon target, giving a pass or fail. The report also provides other information around the energy profile and energy costs. We will work with you to provide the most practical solutions to achieve a pass while maintaining complete design flexibility.

We can also take care of any extensions, conversions or change of use projects, where an SBEM Calculation may 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.

Would you like to discuss your project?

Call us for a chat on 01202 280062 or email

"We would consider Build Energy our first point of contact when we are working on a Design and Build contract. Build Energy have completed tasks to a high standard, on time and to a reasonable price for all projects we have worked on together. The Quality of the information presented is to the highest standard and contains all of the required detail. We will be happy to work with them again on future projects, and would recommend them to others without hesitation."  

Noel McPolin

Kane Group