The Community Infrastructure Levy (CIL) is a mechanism to allow local planning authorities to seek to raise funds, in the form of a levy. It is required from development in order to pay for the infrastructure that is, or will be, needed as a result of that new development. For details including the charging schedule view the CIL page
For some larger development , there may also be a requirement to enter into a legal agreement under Section 106 of the Town and Country Planning Act. This is usually to provide affordable housing and site specific local infrastructure such as open space and access roads. The planning service can advise developers what facilities need to be included in an agreement and developers will be asked to pay the council’s legal fees in drafting, negotiating and completing an agreement.