You could face higher water bills
Modern homes come with water meters that actually show how much water you use, meaning you’re only billed for that amount. That also means you can keep bills low by installing efficient appliances and taking care not to waste water.
However, some semi-detached and terraced homes built before the 50s can’t have these smarter meters fitted because the water inlet is joined to the houses on either side. That means the water company will estimate how much you’re using and bill you accordingly, which will be pretty annoying if you’re careful not to waste any.