When I did some, I used a 19-35 and a 24-70.
The lenses were specific for the effect aspect and alot of lighting capture. Ergo: wide angle for interior shots to make the rooms look spacious and the exterior for specifics of selling the home's attributes.
if you get serious, and want to make money, you'll want to eventually get a Tilt-Shift lens.
But that's a whole different world.
if your out to build a portfolio I would seriously recommend certain other lenses and setups but again that would be for higher end pro work.