It's maddening that property owners can vote against new construction, when they have a deep conflict of interest. The community may require housing, but the homeowner has an interest in seeing housing prices go up forever. It's similar to this ridiculous notion that expensive housing is a good thing. We give absurd tax breaks to homeowners (why can't I deduct the lost interest on my rent?), and people lament falling…
What? London is full of new housing under construction. Many of the flats will be tiny as well. The problem (for those trying to live in the city) is that the houses will be hugely expensive. For London in particular, the problem is that there are too many people who want to own a house there. That's why the prices are high. You can't call the place underdeveloped, it's not a lack of supply due to regulations. If you…
Obviously there's the issue with green belts, but even beyond that there's massive potential for increasing the housing density of outer London. Both because of its current low density, and because a lot of the existing housing stock is made up of grey suburban estates which would be more or less unmourned if redeveloped. Look up 'densification' for more information.
Also, of course, it is important to try to reduce demand by making the Northern cities an alternative centre of gravity (HS2, HS3, new local powers for unified city mayors in Manchester and Birmingham, and so on).
[1] - https://www.gov.uk/government/uploads/system/uploads/attachm...