Filming troubles

For one of our scenes we wanted to film in in a flat however we do not have access to a flat. So to try and recreate a flat scenery to do this we have asked to use a friends bungalow which will look similar to a flat as all of the rooms are on one floor like a flat. With this problem comes another as we also need a flight of stares so to try and recreate a block of flats flight of stares we will be using a multi story car park as the flight of stares are similar so we can make it look like the character are in a block of flats. to further create the illusion that our characters are in a block of flats is by filming scenes of a block of flats and then cutting to the bungalow this should give the impression that you are in a flat