Elon Musk’s firms have introduced solar roof, individual tiles/slates so when you build a new housing estate you could roof them all, from scratch with lovely looking individual solar tiles.
Or if the house was say, 100 years old and needed a new roof, you could strip and replace.
Obviously they are expensive that normal tiles but you don’t have the ghastly looking solar frames on your roof and if a tile gets broken, you just replace the single tile.
If the roof needs work, you do not first have to remove the solar frames.
Some time ago Graphene was discovered. One of the possible uses is in Graphene Photovoltaic windows.
So you could have both Photovoltaic windows and roof, that just leaves the walls?