IMO we should probably reduce taxes on house builders. Maybe even give them tax exemptions. Do what we can to increase supply.
Speculators wanting to buy a house, redo the kitchen, and mark up the price 20% 6 months later though? We could just let older, unrenovated houses be cheap. That opens up deals to new home buyers. You can redo the kitchen after buying the house if you really care. You don't need some middle man to do it and mark up the house.