Comment by ParrotyError

All kinds of things. Large organisations (supermarket chains like Tesco) holding onto vast "land banks," new property being bought up and left vacant by foreign investors as fast as it can been build (a big problem in London and Cambridge), construction companies and their investors who want to restrict the supply to keep prices high, a lack of suitable places to build new housing (lack of infrastructure, protected countryside...). Everywhere I look I keep seeing new flats (apartments) being built where offices used to be but they are empty, so it's a bit of a mystery. Maybe these are of the wrong type or these are examples of the ones the foreign investors are buying?