1) Green belt policies prevent the expansion of cities outwards. Compare the footprint of London to other major European cities and you'll see it's barely moved at all for decades.
2) Discretionary planning policies that mean local councils can turn down development, even when it adheres to stated rules. See for example this brownfield development in Brighton, a city that has one of the worst housing delivery records in the country: https://www.bbc.co.uk/news/articles/cwygkz57k1vo
The professional planning board recommended it for approval, but it was turned down by the political committee because of local complaints. A well specified zoning system would avoid this. Reduced uncertainty would make it possible for smaller builders to enter the market
3) affordable housing mandates (known as Inclusionary Zoning elsewhere). These specify that some amount of the new building must be offered at below market rates. Although there's a strong moral case for capturing some of the value produced by giving planning permission, this effectively acts as a tax on building homes in places with shortages. Ideally, people would be most incentivised to build where prices are highest, but this policy removes that incentive.
1) Green belt policies prevent the expansion of cities outwards. Compare the footprint of London to other major European cities and you'll see it's barely moved at all for decades.
2) Discretionary planning policies that mean local councils can turn down development, even when it adheres to stated rules. See for example this brownfield development in Brighton, a city that has one of the worst housing delivery records in the country: https://www.bbc.co.uk/news/articles/cwygkz57k1vo
The professional planning board recommended it for approval, but it was turned down by the political committee because of local complaints. A well specified zoning system would avoid this. Reduced uncertainty would make it possible for smaller builders to enter the market
3) affordable housing mandates (known as Inclusionary Zoning elsewhere). These specify that some amount of the new building must be offered at below market rates. Although there's a strong moral case for capturing some of the value produced by giving planning permission, this effectively acts as a tax on building homes in places with shortages. Ideally, people would be most incentivised to build where prices are highest, but this policy removes that incentive.