Housing Justice provides a range of resources for churches running their own Homelessness Sunday service on this theme via their website. These are added to in the weeks leading up to Homelessness Sunday.
You could also explore some of these resources before Homelessness Sunday:
Coming Home (2021) is a report of the Archbishops’ Commission on Housing, Church and Community. It re-imagines housing policy and practice, providing a Christian vision for 'good' housing, based around five core values
More than Bricks and Mortar? (2019) is a resource from the Joint Public Issues Team (JPIT). It gives key information, suggests action, and provides questions for reflection
A Place to Call Home (2017, also from JPIT) is a series of six bible studies for group discussion around a range of housing issues
Beyond the Justice and Peace section of Singing the Faith there are other striking texts to be found e.g. Allan Dickinson’s Where can we find you, Lord Jesus our Master? (StF 672) and Damien Body’s engagement with tough issues of prostitution and poverty in Dressed up on the kerbside(website only).