The King's School's 2020 development plans are designed to close the two existing school sites in Macclesfield and open a new single site school in Prestbury, near Macclesfield. The development plans involve selling off the two existing school sites for housing development to fund the new school site. The school acquired greenbelt farmland adjacent to its Derby Fields site for which it subsequently sought planning permission in order to develop the existing school site and the farmland for housing. Planning permission was granted to the school to build more than 250 houses on the greenbelt land in Macclesfield in July 2016. The proposed new school will also be built on green belt land in nearby Prestbury. Planning permission for all sites was confirmed when the Secretary of State declined to call in the plans for further scrutiny in September 2016.