Is there a way to group/combine tiles?

I’m quite new to Defold and game dev in general so I want to know if there’s a way to group tiles together so that when I used it in a set_tile function, all the group tiles will be used instead of just one tile?

This is the tilesource I have for one of my building.

I currently do this to generate my tilemap.
set_tiles

Is there a better way to do this? The tilemap is generated at runtime using data I pulled from a database.