Check out the following websites for more information about affordable housing and legislation impacting affordable housing:

Non-Profit Housing Association of Northern California (NPH)	NPH works to advance affordable housing as the foundation for thriving individuals, families and neighborhoods.
Housing California	Our mission is to prevent homelessness and to increase the amount of decent, safe, permanently affordable and accessible housing available to homeless and low-income families and individuals in California.
National Housing Law Project	The National Housing Law Project (NHLP) is a national housing law and advocacy center. The goal of NHLP is to advance housing justice for the poor by increasing and preserving the supply of decent affordable housing, by improving existing housing conditions, including physical conditions and management practices, by expanding and enforcing low-income tenants' and homeowners' rights, and by increasing opportunities for racial and ethnic minorities.
National Low Income Housing Coalition	Dedicated solely to ending America's affordable housing crisis
Western Center on Law and Poverty	Western Center advances and enforces the rights of low-income Californians in health, housing and public assistance by working statewide for systemic change.
National Alliance of HUD Tenants (NAHT)	A multi-cultural, tenant-controlled alliance of tenant organizations in privately-owned, multifamily HUD-assisted housing. Hundreds of tenant associations representing thousands of tenants in every region of the country are already involved, with affiliated coalitions in 32 states, working together to: Preserve affordable housing * Protect tenant's rights * Promote tenant ownership and control
Center for Community Change	Helping low income people, especially people of color, build powerful effective organizations through which they can change their communities and public policies for the better.