SBEM stands for Simplified Building Energy Model. It is a government-approved methodology used in the United Kingdom to assess and demonstrate the energy performance of non-domestic buildings, both new and existing, in compliance with Building Regulations Part L.

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Purpose of SBEM Calculations

SBEM calculations are primarily used to:

• Demonstrate compliance with Part L2A (new buildings other than dwellings) or Part L2B (existing buildings other than dwellings) of the Building Regulations.
• Generate Energy Performance Certificates (EPCs) for commercial buildings.
• Model energy consumption and identify opportunities for improvement.
• Support BREEAM assessments and other environmental certifications.

 

Key Outputs

SBEM calculations produce the following key outputs:

• Building Emission Rate (BER): Predicted CO₂ emissions per m²/year.
• Target Emission Rate (TER): Benchmark CO₂ emissions set by Building Regulations.
• Asset Rating: Expressed via a Commercial EPC (A-G rating).
• Recommendations: Measures to improve energy performance and reduce emissions.

To comply with Building Regulations, the BER must be equal to or less than the TER.

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When SBEM is Required

SBEM calculations are required:

When a non-domestic EPC is needed (e.g., sale or lease of a property).

• At design stage: To demonstrate compliance before construction begins.
• At as-built stage: Finalised assessment based on actual specifications.
• For refurbishments or extensions to existing non-domestic buildings.
• When a non-domestic EPC is needed (e.g, sale or lease of a property)