Interesting idea! (Although our bodies will never be digitized -- and they'll need some protection from cold and a way to sleep...)
The closest thing I've heard to a tech solution for housing is the 3D printed house that went on the market. That raises the question of whether there's some way to radically reduce the cost of creating housing. (Maybe interchangeable parts, like what revolutionized mass production?)
The only role I can even imagine for digitalization would be digital pictures of available properties -- maybe automating some kind of drone fly-by at addresses where properties are for sale, and then creating a better web site for browsing them?
Of course, there might be other fixes for housing too. (Encouraging employers to let people work from home, or at least creating jobs in a wider variety of places.) Someone once tried to convince me the solution was just to encourage people to have fewer children, because over the time the resulting population decrease would do a lot to improve the availability (and thus the affordability) of housing.