I thought it was more of a cultural thing, or perhaps enforced by the building code ? Here in France I've never seen a house or flat without shutters. In Bangkok, when I was looking for a condo, none of them had shutters.
A cursory web search tells me shutters can influence the DPE ("diagnostic de performance énergétique".) A bad rating means you can't rent your property.
A cursory web search tells me shutters can influence the DPE ("diagnostic de performance énergétique".) A bad rating means you can't rent your property.