Part L
Air tightness testing
Pressure testing to measure air leakage against the design target, with a certificate for building control.
TestingView service
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Energy & performance calculations
SBEM and BRUKL calculations
An accredited energy assessor models a new non-domestic building with SBEM or other approved software to compare it with the Part L targets. You receive a design-stage BRUKL report before work starts and an as-built BRUKL report at completion.
When you need it
Part L asks for a new non-domestic building’s primary energy and emission rates to be no worse than targets set by a notional building of the same size and shape. These are calculated under the National Calculation Methodology using SBEM or other approved software, and the design figures go to building control before work starts. Some extensions to non-domestic buildings also need a model, depending on the work; we confirm this when we scope the job.
The calculation is updated at completion with the tested air permeability and any changes made on site. The Future Buildings Standard updates come into force on 24 March 2027, subject to transitional arrangements, and the BRUKL report remains the compliance output under the new edition.
What is included
Included
- Design-stage SBEM model and BRUKL report
- Advice on fabric, services or renewables where a target is missed
- As-built model updated with tested results and site changes
- As-built BRUKL report for building control
Priced separately
- Air tightness testing
- Commercial EPC lodged from the as-built model
- Dynamic thermal modelling for overheating or comfort
- Recalculation after major specification changes
Your written quotation confirms the exact scope, what is included and any limits for your building.
What you receive
A design-stage BRUKL report for building control before work starts, and an as-built BRUKL report at completion showing the building rates against the targets.
Sent as a PDF. We can send it to your building control body or agent on request.
Our reports and testing support the compliance process. Approval and completion decisions remain with your building control body: the local authority, a registered building control approver, or the Building Safety Regulator for higher-risk buildings.
How to prepare
- Plans, sections and elevations
- Use of each space and expected occupancy
- Wall, floor, roof and glazing specification
- Heating, cooling, ventilation, hot water and lighting details
- Any planned renewables, such as PV or heat pumps
- Site location and orientation
Send what you have. Missing details will not stop an enquiry; we will tell you anything still needed.
How it works
Tell usChoose the service or describe the job.
Written quotationScope, deliverables and price, confirmed in writing.
We manage the workArranged and coordinated by RegulaBuild. Technical work is carried out by appropriately qualified professionals.
Your reportThe output named in your quotation, with any follow-up.
Questions
What is the difference between SBEM and SAP?
SAP is used for dwellings. SBEM, or other approved software under the National Calculation Methodology, is used for buildings other than dwellings.
What is a BRUKL report?
The Building Regulations UK Part L compliance report. It sets out the target and building rates and the key specification, and building control uses it to check the calculation.
Will the Future Buildings Standard apply to my project?
It comes into force on 24 March 2027. It does not usually apply where the building control application or notice was given before that date and work starts before 24 March 2028, with different dates for higher-risk buildings. We confirm which standard applies when we scope the job.
Often booked with
Combine them in one quote request
EPC
Commercial EPC
Non-domestic EPCs for commercial premises being sold, let or built.
Energy certificatesView service
Planning
Energy statements
Energy and carbon statements for planning applications, written to the local plan policy that applies.
Energy calculationsView service
Where we work
SBEM and BRUKL calculations across England
Request a quote
Discuss sbem and brukl calculations
Start with this service and add anything else you need. If you are unsure, say so and we will advise.