It wouldn't be safe to build on its a toxic site.(although that doesn't bother developers. ) As a GP, I'm aware genetic abnormalities in children seems very common from such areas, don't recommend living on them! If things drop out , may find the true worth is a lot less than £150000! Would be ideal for a Woodhead Electric museum now York is stopping been a railway museum as such, EM1,EM2 maybe the 306 dumped in storage and a more commercial short steam line?