We have a housing association in every county, some are really big now. I had to visit the industrial estate locally where one HQ complete with warehousing and garages are located. Monday morning there were 10 big shiny Mercedes vans loading up with gear for onsite jobs.
We have building firms who only build repair social/sheltered housing. It's big business.
All the new properties are built to be passive Haus with solar panels, heat pumps, triple glazing etc
Don't forget we're a socialist principality, for 27 years have been learning to organise ourselves after a fashion.