Part L BRUKL & SBEM
SBEM Calculations & BRUKL Reports for Commercial Buildings
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We provide fast, accurate SBEM calculations and BRUKL reports to demonstrate compliance with Part L of the Building Regulations for new build and major commercial projects across the UK.
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Supporting architects, developers and contractors from design stage through to completion.
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Discuss your project with us here
Part L Reports & SBEM Calculations
SBEM (Simplified Building Energy Model) calculations are required to demonstrate that a non-domestic building complies with Part L of the Building Regulations.
They form the basis of the BRUKL report, which confirms whether a proposed building meets required energy and carbon performance targets.
We help ensure your design achieves compliance early in the process, reducing the risk of costly redesigns or delays during construction.
What are SBEM calculations?
SBEM is the UK Government-approved method for assessing the energy performance of commercial and non-domestic buildings.
The calculations evaluates:
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Building fabric (walls, roof, glazing, insulation)
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Heating, cooling and ventilation systems
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Lighting and controls
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Hot water systems
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Renewable technologies
What is a BRUKL report?
A BRUKL report is the official output of SBEM calculations.
It is submitted to Building Control and confirms that a building design meets Part L2A (new builds) requirements.
A BRUKL report is typically required at:
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Design stage (before construction begins)
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As-built stage (on completion of the project)
We ensure both stages are fully supported, from initial modelling through to final EPC sign-off.
When are SBEM calculations required?
You will need SBEM calculations for:
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New commercial buildings over 50m2
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Extensions or major refurbishments
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Change of use projects
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Shell & core / fit-out developments
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Buildings requiring Building Regulations approval
We always recommend completing SBEM at the earliest design stage, so compliance issues can be resolved before construction begins.
Why early stage SBEM matters
Completing SBEM calculations early allows potential issues to be identified before construction starts.
This can help:
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Avoid redesign costs
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Prevent delays in Building Control approval
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Improve energy performance outcomes
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Reduce expensive on-site changes
Most compliance issues are significantly easier - and cheaper - to resolve at design stage.
Our SBEM & BRUKL service
We provide a structured, practical approach to compliance:​
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Initial Review - We assess your drawings, specifications and project details
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Design Stage SBEM - We model your proposed building and identify any compliance risks early.
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Recommendations (if required) - We advise on practical improvements to help achieve compliance.
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BRUKL Report Submission - We produce and submit your compliance report for Building Control approval
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As-Built Assessment - We update the model post-construction and produce final certification and EPC.
Who we work with
We support a wide range of commercial clients, including:
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Property developers
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Architects and design teams
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Main contractors and M&E consultants
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Commercial landlords
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Public sector estates (schools, universities, NHS)
Turnaround times
We understand that project timelines are critical.
We aim to provide:
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Fast initial assessments
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Responsive design-stage feedback
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Efficient report delivery to meet programme deadlines
Why choose kW Energy Consultants?
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Experienced Level 5 accredited assessors
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Practical, design-focused compliance advice
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Fast and reliable turnaround times
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Support from design stage through to completion
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Trusted by commercial and public sector clients
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Nationwide coverage​​
Need SBEM or BRUKL support for your project?
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Send us your drawings or project details and we'll provide a fast, clear quotation and compliance review.
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Call us on 07837 941220
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Email us at james@kwenergyconsultants.com
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Or fill out the form below
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