Better two-storey building

It is more economical to building up two-storey than to build consuming more real estate.

If your plot will not accommodte the space you need in one storey, youmaynot have any laternative but to cnstruct a two-storey home.

Also, these days, because of earthquakes, many cities fall into seismic zones. We need to factor that in. It is better to be safe than sorry.