Modeling modular enterable houses?

Hi,

currently I am moddeling a house and came up with a question which I couldn’t answer myself. Is it usefull or a well known manner to model a modular house which is enterable ? For instance If you are planning an mountain scene with some alpin huts scattered around the landscape.

So maybe I could then easily build up new houses inside unreal to save up some modeling + texturing time, but increasing the variety of houses.

Regards