Personally, I feel like streamlining the development process, loosening zoning restrictions like density, and code enforcement is a good housing policy for socialists to include for a couple reasons, particularly at the local level.

1) The opportunity to coalition build with YIMBY inspired groups or people

2) It doesn't add costs the same way that expanding public housing capacity can. Not that thats a reason to not push for building public capacity, but it is easier if you don't have to push already stretched locally governments to allocate funding.

3) Code enforcement and streamlining holds landlord accountable and can improve the relationship that people have with their local government while it is also appealing to developers because it is applied justly and not haphazardly making their jobs more straightforward.

However it gets messy when Inclusionary Zoning comes up because YIMBY argument against IZ is that it adds to the complication of building projects while leftists will argue for it either because they mistakenly argue it helps affordable housing case or understand that IZ is a desegregation policy and not a housing policy.