TWYNN- Depending if you are in England, Section 9 of the Housing and Planning Act 2016 (which amends the Self-build and Custom Housebuilding Act 2015) defines custom and self build housing and the Government’s National Planning Practice Guidance provides further clarification (Ref ID: 57-016-20170728). The CIL Regulations also provide a definition for CIL purposes (Reg. 54A). Subject to your authority being satisfied that the initial owner of the home will have a primary input into its design and layout, which the developer/enabler should demonstrate in their application to you, your authority has a broad canvass to allow customised housing options (including shell finished housing), along the lines as you describe. We would advise however that any consent includes conditions or a unilateral undertaking/s106 provision which requires the development to comply with the Section 9 definition to avoid the development simply being built out for market sale once consent has been granted. Otherwise the opportunity to provide for people who want to build their own homes in your borough will be lost.