Self-build housing is where individuals or groups of individuals directly organise the design and construction of their own homes. This covers a wide range of projects including a traditional DIY self-build, to projects where self-builders employ someone to build their homes or a group of people build their own homes together.
Custom build housing is where you work with a developer as an individual or a group to help deliver your own home. The developer may help to find a plot, manage the construction and arrange the finance for your new home. This is more of a hands-off approach, but homes can be tailored to meet individual requirements with different levels of customisation.
Community-led housing is where people and communities play a leading role in addressing their own housing needs. It has many overlaps with group self-build and custom-build, but also considers the long-term ownership or management, and where any benefits (such as affordability) are legally protected.
The Self-build and Custom Housebuilding Act 2015 places a duty on all local councils to maintain a register of individuals and associations who are interested in acquiring serviced plots of land for self and custom housebuilding.
You can get more information on the Council website.