Icon: Efficiency Services

The Standard Assessment Procedure (SAP)

The Standard Assessment Procedure (SAP) is adopted by Government as the UK methodology for calculating the energy performance of dwellings within Approved Document L1A - Conservation of fuel and power in new dwellings and Approved Document L1B - Conservation of fuel and power in existing dwellings.

The calculation is based on the energy balance taking into account a range of factors that contribute to energy efficiency:

  • Materials used for construction of the dwelling    
  • Thermal insulation of the building fabric

  • Ventilation characteristics of the dwelling and ventilation equipment

  • Efficiency and control of the heating system(s)

  • Solar gains through openings of the dwelling

  • The fuel used to provide space and water heating, ventilation and lighting

  • Energy for space cooling, if applicable

  • Renewable energy technologies

We are now in a position where we can offer to carry out your SAP calculation for an additional cost starting from £100 including VAT

If you need further information please contact the Building Control team by telephone or email. Alternatively you can write to or visit a Building Control Officer at our Sleaford Offices: Building Control Services, North Kesteven District Council, Kesteven Street, Sleaford, Lincolnshire, NG34 7EF