Jersey Police Headquarters is a new build project on the site of the open section of Green Street Car Park in St Helier. The four storey superstructure is a reinforced concrete frame with masonry infill walls where required. There is a transfer structure at ground floor level over a car park grid to the basement under. Vehicle access off Rue de Fort is provided both to the custody suite at ground floor level and to the basement parking. As part of the project an extension to the top level of Green Street Multi-Storey Car Park has been constructed to replace open car park area.