There is a layout of housing about halfway down this
https://www.derbytelegraph.co.uk/news/local-news/homes-plan-derelict-derbys...
Having been at the crag recently, it looks like the houses will be quite a way from the crag, on the other side of the access road. The house nearest the right side of the crag may be an issue for the routes further right. If the crag isn't netted then I think climbing, in small groups, no loud noise, sensible toileting, and leaving well before dark might not be too intrusive, and possible. Obviously all it takes is one angry resident, a climber parking on their drive, pissing in their garden etc etc before it all kicks off, but I think climbers need to keep using this crag and try to set a sensible precedent.
I'm guessing access will be difficult whilst construction is ongoing as there may well be security on site to protect materials (?).