House prices have risen in proportion to discretionary income growth for a generation or more.
locations generally deteriorate over time whilst building amenity increases. as resources dwindle the building compenent may inflate too. the location of a 'median' home will continue to move outwards from the GPO probably to the point where people just move to a new town.
so we are not talking about the same home over the duration of time. house prices can and will rise even if wages hold constant