CIL Calculator

The Winchester City Council (WCC) Community Infrastructure Levy (CIL) Calculator has been developed by officers to assist developers and homeowners in calculating an indicative charge for CIL. It is not intended to provide a definitive answer; this will be calculated by WCC officers when the application is submitted for approval or prior approval.

Winchesters' CIL does not apply to the part of the District that is within the South Downs National Park. The National Park will be developing their own CIL Charging Schedule for the whole of their area.

Please Note:

  • Please enable macros to use the calculator, or use the sheet tabs at the bottom of the spread sheet to navigate between pages. 
  • The calculator may not be compatible with software used on Macs; if this is the case please refer to the CIL Regulations 2010 (as amended) for the calculation method.  Links to the CIL Regulations can be found on the following web page:  
  • Calculation of Charge

    CIL is charged on the net additional gross internal floor area of a development.
    Where buildings are demolished, the total of the demolished floorspace will be off-set against the floorspace of the new buildings, providing the buildings were in lawful use prior to demolition.

    In this context, a building is considered to be in lawful use if a part of that building has been in use for a continuous period of at least six months within the period of 3 years* ending on the day planning permission first permits the chargeable development.

    * This definition of lawful use is proposed in the CIL (Amendment) Regulations 2014 which has not yet come into force, but are expected to be in place by the time Winchesters’ CIL charge is brought into effect in April 2014.

  • You need to know:
    • The charging zone in which the development is proposed; a map is provided to help.

    • The gross internal floor area (sq m) in lawful use:-

      • To be demolished
      • To be retained for different uses

    • The gross internal floor area (sq m) proposed for different uses; definitions of the different uses are provided to help.

    The calculation of the chargeable amount of CIL to be paid for a development proposal is set out in Regulation 40 of the CIL Regulations 2010 and the Amendment Regulations 2011, 2012, 2013 and 2014. For details of the charge calculation, please refer to these Regulations.