SBEM Calculations
SBEM Calculations for new Commercial Buildings
Understanding SBEM Calculations
Simplified Building Energy Model (SBEM) calculations are a key requirement for demonstrating compliance with Part L of the Building Regulations in the UK. They assess the energy efficiency of non-domestic buildings by calculating their energy consumption and carbon emissions.
What Are SBEM Calculations?
SBEM is a government-approved methodology used to evaluate the energy performance of new and existing commercial buildings. It provides an energy rating based on factors such as:
Building fabric and insulation levels
Heating, cooling, and ventilation systems
Lighting efficiency
Renewable energy integration
SBEM assessments generate a Building Emission Rate (BER), which must be lower than the Target Emission Rate (TER) to achieve compliance with Part L.
When Are SBEM Calculations Required?
SBEM calculations are needed at key stages of a building’s lifecycle:
New builds: Required at the design stage and upon completion to obtain a BRUKL report and an EPC.
Extensions and refurbishments: Necessary for large extensions or major renovations affecting energy performance.
Change of use: Needed when converting a building to a different usage category.
Why Are SBEM Calculations Important?
SBEM calculations ensure that buildings meet energy efficiency regulations, supporting the UK’s net-zero carbon targets. Benefits include:
Regulatory compliance with Part L and planning requirements.
Lower operational costs through improved energy performance.
Enhanced sustainability credentials for property owners and developers.
Higher EPC ratings, increasing marketability and asset value.
Why Choose Generation?
✅ Elmhurst Approved Assessors - accredited and qualified to produce compliant SBEM reports
✅ Early-stage involvement - we work with architects and developers from design stage so you avoid costly late changes
✅ Fast turnaround - we understand project timelines and deliver to them
✅ Plain English advice - we translate the technical output into clear recommendations your team can act on
✅ London specialists - experienced across a wide range of commercial building types across all London boroughs
Our SBEM Calculation Process
1. Initial consultation
Send us your drawings and project details. We'll review them and confirm exactly what's needed.
2. Design stage calculations
We model your building using the approved SBEM software and produce a compliant L2A or L2B report for your planning and Building Regulations submission.
3. Guidance on compliance
If the design doesn't hit the required targets, we'll identify the most cost-effective changes - fabric improvements, lighting specifications, mechanical systems - before work begins, not after.
4. As-built calculations
Once construction is complete, we update the model to reflect what was actually built and issue the final compliance report for Building Regulations sign-off.
SBEM Calculations FAQs
What's the difference between L2A and L2B?
Part L2A applies to new commercial buildings. Part L2B applies to existing commercial buildings undergoing major refurbishment or extension. We handle both.
How early in the project should I get SBEM calculations done?
As early as possible. Getting us involved at design stage means we can flag compliance issues before they become expensive problems on site.
How long does it take?
Design stage calculations typically take 3-5 working days once we have all the required information. We'll confirm timescales when you get in touch.
What information do I need to provide?
Architectural drawings, building specifications (insulation, glazing, heating/cooling systems), and any engineering design information. We'll send you a full checklist when you book.
Can you help if my design is currently failing compliance?
Yes - this is one of the most common reasons clients come to us. We'll identify what's dragging the score down and work with your design team on practical fixes.
Get Your SBEM Calculations Underway
Working to a tight planning or Building Regulations deadline? Don't leave SBEM calculations to the last minute. Get in touch now and we'll confirm turnaround times for your project.
📞 Call: 07453 249 591
✉️ Email: enquiry@generation.co.uk
Address:
124 City Road
London, EC1V 2NX
Registered in England no: 08900037
Contacts
+44 (0) 7453 249 591
enquiry@generation.co.uk
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