Of course we need houses. There aren't enough houses currently which keeps prices of rent and ownership artificially high. Overcrowding and homelessness is not preferable to some people losing their view of fields. However the government could -
Stop or reduce foreign ownership of uk housing to use as holiday homes (or tax this enough that they could build quality housing from the proceeds) - some high end blocks in London are 75% empty at any one time
Do the same with second/ holiday homes
Encourage more investment in under populated areas to divert population growth from overcrowded areas
Make it harder for people to develop on greenfield sites and easier on brownfield sites. In my city there is loads of waste land near the city centre, some with old factories etc sitting vacant for years and years. They should ensure its sold or developed not just kept in a run down state
Change the right to buy scheme which is depleting housing stock
Improve the laws and recourse around quality of housing (eg you can withhold your rent if the house is mouldy) so more current housing meets minimum standard
Ensure that any new developments actually have to implement the actions recommended in an independent flood risk assessment and build in flood resilience measures as standard, rather than let developers get away with a flood assessment as a tick box, and find a way to ensure these developments can access insurance,
Ensure there is enough infrastructure in places with building e.g. traffic planning, schools, doctors, and green spaces
Not sure what can be done about the UK culture where people are reluctant to live in apartments (outside London and selected other pockets of the UK). In many other countries its the norm but in the UK its seen as settling or a stepping stone, rather than a valid long term choice