You don't pay extra on your mortgage. A mortgage is a loan to buy the house with the title to the bank as collateral plus some bundling like insurance. Otherwis

You don't pay extra on your mortgage. A mortgage is a loan to buy the house with the title to the bank as collateral plus some bundling like insurance. Otherwise people wouldn't walk away from "underwater" mortgages. It may come with inconveniences of linked job changes and relocation but that is a real gain of wealth. The locational value has gone up - which is why they can even afford to "displace". Assuming that buying a home elsewhere will automatically have comparable price or displacing is also a bad assumption. Despite the rhetoric a single person with a collegd degree in a neighborhood won't cause appreciable rises in real estate value.