We've seen a house this weekend that we like, but the back garden seems to be falling into the (commercial) neighbours parking lot. My appraisal is that there are few trees (one huge) that need removing, ground cleared and a retaining wall put in on the neighbour's side (then new fencing for us which isn't falling over!). I've no idea who to talk to - builder, gardener, structural engineer? Obviously we'd need to know how much it'll cost to put right before we consider putting an offer in! Any ideas greatly appreciated!