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SAP & SBEM Calculations

As designed and as built energy calculations for new build dwellings, extensions and commercial buildings.

SAP Calculations

SAP or Standard Assessment Procedure is the Governments, is the approved method for assessing the energy rating of a dwelling. It is a required to comply with Building Regulations when you are:

  • Building a new dwelling
  • Converting any existing property into a dwelling
  • Creating an extension to a dwelling where the glazing is more than 25% of the floor area being added

The SAP assessment process is split into two stages:

Design Stage – the initial production of all the SAP documentation which needs to be carried out at the same time as the design of the dwelling or extension, this is where any tweaks to the building design can be made before a planning application is submitted.

As Built Stage – once the project build is completed, any final adjustments to the SAP can be made and the final Energy Performance Certificate (EPC) issued for sale or letting.

SBEM Calculations

For commercial non-dwellings SBEM, or Standard Building Energy Model, is the Governments approved method for assessing the energy rating of the property. Nearly all new commercial buildings over 50m² must be shown to pass SBEM calculations. This also applies to most extensions, conversions and renovations of commercial non-dwellings.

It is vitally important that if you are considering building, converting or extending any building you consider the implications of SBEM or SAP as early as possible in your design process – do not leave it too late! Once a building is built it is far more difficult and costly to fit retrospective measures in order to pass your energy assessment and obtain that vital final EPC. Talk to us now and see how we can help.

Events ›


FBE Chairman’s Dinner & Awards 2017

Thursday 12th October 2017

The City Rooms, Hotel Street, Leicester, LE1 5AW

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