New Build SBEM Calculations and EPCs
All new build properties require a Part L document to be compiled as part of the process to meet building regulations. A design stage SBEM calculation is required to be submitted to Building Control before any work commences on site. An on construction SBEM calculation is required within 30 days of completion of the building. This must be done by a qualified assessor and is required within 30 days of completion of the building along with an on construction EPC.
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Frequently Asked Questions…
What is Part L?
Part L covers the energy efficiency requirements of the building regulations:
- Part L1A (New Dwellings)
- Part L1B (Existing Refurbishment & Extensions)
- Part L2A (Non Domestic New Buildings)
- Part L2B (Non Domestic Refurbishment & Extensions)
What is the 'Design Stage' SBEM Calculation?
The energy assessor will complete the compliance assessment via plans and specifications developed by the architect or construction developer.
Should compliance with Building Regulations not be achieved initially, the energy assessor will give advice on what can be improved to ensure compliance is achieved in the most cost-effective manner.
When this process is completed, the energy assessor will issue a series of reports which can be passed on to building control and construction can then begin.
What is the 'On Construction' SBEM calculation?
Once the construction of the building is complete, a second assessment will be undertaken by the energy assessor to ensure any deviations from the ‘design stage’ calculation are modelled and to check compliance with regulations has been achieved.
The energy assessor will be required to visit the property and will usually ask for confirmation of items such as the actual boiler installed, air pressure test score and any other changes that may have occurred during the build process. At this point the energy assessor will be able to complete the EPC for the building. The energy assessor will feed all of this data into the assessment software and then produce the EPC.
Certain buildings are exempt from needing an EPC. These include:
- Buildings primarily used as places of worship.
- Temporary constructed buildings which have a lifespan of less than 2 years.
- Industrial and agricultural sites that have a low heating demand.
- Standalone buildings which have a floor area less than 50m2.
- Protected buildings that have a designated environmental or historical merit.