Drove by last year's nest site yesterday afternoon, no sightings but did ask a workman about work being done. Window washers were at the highest windows on one side. Apparently roofing had just finished on a nearby building, more roofing to be done on a larger flat-roofed area nearby, and bids were in for other buildings including nesting one. Bidding to working takes time and owners have been co-operative, so just keeping you up to date on what a worker told me.