The following are websites/resources that may be helpful.

Community Led Homes – a central resource for all things relating to community-led housing which is a partnership of the four organisations directly below:
National CLT Network
UK Cohousing Network
The Confederation of Co-operative Housing

Self-help Housing – involves groups of people, often in housing need, bringing empty properties back into use

Community Self-Build Agency – helping people in housing need to build their own homes

Community-led Housing Toolkit – a toolkit for getting a project up and running published by Locality

Delivering a community-led housing enabling service: experience and lessons from existing practice (Power to Change, authors P Duncan and J Lavis, Jun 2018)

Community-Led Housing: a Key Role for Local Authorities (produced by Cooperative Councils Innovation Network, Nov 2017). This document is aimed by local authorities.