Pergola query

Structurally, yes as it's bolted, but the important thing is how the flashed it so that the rain is kept out, how did they do that?

The last thing I'd want from a pergola is a gap between its roof and the wall letting rain off the fall on me while I passed under the gap. I'd consider that a fail.

Yes if it has a roof it's not a pergola, pergolas are open.

that name has crept it we know what the OP is talking about, its a lean-to, no doubt its one of those eyesores with the perspex roof, your advice is spot on i was just being pedantic for the laugh.