SAP Calculations for Northern Ireland

SAP Calculations for Northern Ireland 

All New Dwellings in Northern Ireland must have a SAP Calculation before construction commences. 

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What is a SAP calculation?

Standard Assessment Procedure (SAP) is the UK government's national calculation methodology to demonstrate a building's compliance with Part F of the Building Regulations. Two SAP Calculations need to be performed: Design Stage (before the building is constructed) and As-Built (after construction).

A SAP calculation takes into account:

  • Ventilation characteristics
  • Thermal insulation
  • Materials used 
  • Fuel used to produce space and water heating
  • Efficiency and control of the heating system
  • Renewable energy technologies (if applicable)

Does my building need a SAP calculation?

All new dwellings, extensions and conversions which result in a material change of use of a property, must have a SAP Calculation in order to demonstrate compliance with Building Regulations. However, there are a few notable exceptions. 

Which new builds do not need a SAP Calculation?

Buildings containing rooms for residential purposes such as nursing homes, student accommodation and similar structures are not considered as new dwellings and therefore do not need a SAP calculation.  


What do I need to provide?

Before we can start your SAP Calculation we will need the specifications of your proposed property. You can send these in yourself or instruct your architect to send them to us. Please provide: 

  • Floor Plans
  • Sections and Elevations
  • Orientation e.g. site plan 
  • Construction specification of walls 
  • Specification for all windows primary & secondary heating systems
  • Renewable technology (if applicable)

If you would like to find out more information about a SAP Calculation for your property, please get in touch using the contact details provided. Our expert consultants will be happy to advise you. 





Related Links

SAP Calculations > Building Regulations Part F (Northern Ireland) >

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