New Commercial Building Energy Assessments
L2A SBEM Calculations London
Professional design-stage and as-built SBEM calculations for new commercial and non-domestic buildings throughout London and Greater London.
L2A SBEM Assessments in London
If you are constructing a new commercial building in London, an L2A SBEM Calculation is required to demonstrate compliance with Part L of the Building Regulations.
One Stop Consult provides fast, accurate and fully compliant SBEM assessments for developers, architects, contractors and property owners working on new non-domestic developments.
Our assessors work on projects ranging from small offices and retail units through to warehouses, schools, healthcare facilities and larger commercial schemes.
L2A SBEM Calculations Across London and Greater London
We support projects throughout Central London, Westminster, Kensington, Chelsea, Camden, Islington, Southwark, Lambeth, Greenwich, Stratford, Wimbledon and Ealing.
Nearby coverage also includes Croydon, Bromley, Barnet, Enfield, Harrow, Hounslow, Romford and surrounding Greater London areas.
What Is an L2A SBEM Calculation?
An L2A SBEM Calculation is the energy assessment required for new non-domestic buildings under Part L of the Building Regulations.
SBEM, or the Simplified Building Energy Model, uses Government-approved software to assess the predicted energy performance of a commercial building.
The assessment is normally completed during design and updated after construction so the final Building Regulations report and commercial Energy Performance Certificate can be produced.
What Does the SBEM Assessment Consider?
SBEM assesses the building as a complete energy system, considering the fabric, services and expected operation.
Accurate architectural and M&E information helps the assessor model the design correctly and identify the most practical route to compliance.
External walls, roofs and floors
Windows, doors and rooflights
Heating and cooling systems
Mechanical ventilation
Lighting efficiency and controls
Hot-water systems
Air permeability
Renewable technologies
L2A SBEM Services
What Our London Service Can Include
01
Design-Stage SBEM Calculations
Assessment of the proposed commercial building before construction to confirm the design can satisfy Part L.
02
As-Built SBEM Calculations
Final assessment based on the fabric, HVAC, lighting and systems actually installed.
03
Commercial EPCs
Energy Performance Certificate preparation following the completed as-built assessment where applicable.
04
BRUKL Reports
Building Regulations compliance reports prepared for Building Control.
05
HVAC Energy Assessments
Review of heating, cooling and ventilation systems within the proposed design.
06
Lighting Compliance Assessments
Assessment of lighting efficiency, controls and system power within the SBEM model.
07
Renewable Technology Advice
Review of solar PV and other suitable measures where they form part of the compliance strategy.
08
Technical Design Support
Practical guidance where the initial design does not achieve the required performance.
09
Building Control Support
Assistance responding to relevant energy-compliance queries during design and completion.
Design-Stage SBEM Calculations
The design-stage assessment should ideally be completed before construction begins or before the building-services design is fixed.
This allows the fabric, glazing, HVAC, lighting and renewable systems to be reviewed while changes remain practical and cost-effective.
Where the initial model does not comply, the assessor can identify the areas having the greatest effect on performance.
As-Built SBEM and Commercial EPC
At completion, the assessment is updated to reflect the actual fabric, glazing, HVAC, lighting, hot-water systems and renewable technologies installed.
Changes made during construction should be reported to the assessor so the final model accurately represents the building.
Following a compliant final assessment, the commercial EPC can be prepared and lodged where required.
Typical London Projects
Commercial Buildings We Commonly Assess
Improving the SBEM Result
Practical Compliance Measures
Where the first model does not comply, the assessor can review practical changes with the design team.
Improved Building Fabric
Better wall, roof, floor and glazing performance can reduce heat loss and energy demand.
Efficient HVAC Systems
More efficient heating, cooling and ventilation equipment can significantly improve the result.
Improved Lighting
Efficient fittings and suitable controls can reduce predicted electrical demand.
Reduced Air Leakage
A sensible air-permeability target can support compliance when coordinated with the ventilation design.
Improved Controls
Zoning, time controls and demand-based operation can improve system efficiency.
Renewable Energy
Solar PV or other suitable technologies may support the chosen compliance strategy.
Our L2A SBEM Assessment Process
We coordinate the assessment from the initial design review through to the final BRUKL report and EPC.
Send us the architectural and M&E design information.
The assessor reviews the fabric, glazing, HVAC and lighting.
The design-stage SBEM calculation is completed.
Any required compliance improvements are identified.
The model is updated as the design develops.
Final as-built information and test results are supplied.
The as-built SBEM, BRUKL report and EPC are completed.
1
Project Review
Review the building type, drawings, use and current design stage.
2
Information Check
Confirm the fabric, HVAC, lighting, hot-water and renewable-system information.
3
Design-Stage SBEM
Model the proposed building and assess Part L compliance.
4
Design Advice
Recommend practical improvements where required.
5
As-Built SBEM and EPC
Complete the final model, BRUKL report and commercial EPC where applicable.
Why Choose One Stop Consult?
Our assessors work on projects ranging from small commercial units to large and complex non-domestic developments.
We provide clear calculations, practical advice and responsive support throughout design and construction.
Experienced SBEM assessors
Fast turnaround times
Fixed competitive pricing
Current Part L compliance support
Design-stage and as-built service
Commercial EPC support
Practical M&E design advice
London and nationwide coverage
Information Required for a Quotation
Provide the full London project address, building use, approximate floor area and current design stage.
Please upload the architectural plans, elevations, sections, site plan and available building specification.
Glazing, HVAC, ventilation, lighting, hot-water and renewable technology information should also be supplied where available.
Related London Services
Other Services Your Project May Require
Important L2A SBEM Information
SBEM results depend on the accuracy of the architectural, construction and building-services information provided. Changes made during construction can affect compliance and should be reported to the assessor.
Final assessments may require as-built drawings, product data, commissioning information and air-test results. One Stop Consult provides consultancy and coordination support through experienced SBEM assessors.
Frequently Asked Questions
L2A SBEM Calculations London FAQs
What is an L2A SBEM Calculation?
It is the Part L energy assessment required for new non-domestic buildings.
What is the difference between SAP and SBEM?
SAP is generally used for residential dwellings, while SBEM is used for commercial and other non-domestic buildings.
When should the assessment be completed?
The design-stage SBEM should ideally be completed before construction or before the M&E design is finalised.
What information do you need?
We normally require architectural drawings, the building specification, glazing, HVAC, ventilation, lighting and hot-water information.
Will I receive a commercial EPC?
Where applicable, the EPC is prepared following completion of the compliant as-built SBEM assessment.
Can you help if the building does not comply?
Yes. The assessor can recommend practical improvements to the fabric, HVAC, lighting, controls or renewable systems.
Do commercial buildings need air testing?
Many new commercial buildings require an air permeability test for the final as-built assessment, subject to the applicable rules and project size.
Do you cover all of London?
Yes. We provide L2A SBEM calculations throughout London, Greater London and surrounding areas.
What information is needed for a quotation?
Provide the address, building use, floor area, drawings, design stage and available M&E information.
Request Your Free L2A SBEM Calculations Quote
Complete the form below with the London project address, building use, approximate floor area and current design stage. Upload the latest drawings, building specification and available HVAC, ventilation and lighting information so our team can review the requirement and provide an appropriate quotation.