Milk for £10 and chicken for £51- what if food prices rose in line with house price increases? The charity said that the typical value of a house had increased by just over 43 times since 1971, from £5,632 to £245,319. Applying the house price rate of inflation to everyday food and drink items means that a bunch of six bananas would cost £8.47, a four-pint carton of milk would cost £10.45 and a leg of lamb would be £53.18, Shelter said.