Best way to tidy up this CAD Import?

Bellway Thornhills Phase 1 - Alternative Layout.skp (6.9 MB)
Afternoon folks - looking for some advice on how best to tidy this import up that I received from an applicant… It appears a bit of a mess - given that i’ve used tools like DropGC and Eneroth Make Faces to try and get it all on one level and make the faces etc that are required. Any help would be greatly appreciated - just getting back into SketchUp - the last time I used it was in 2015!

Kind regards,

G

First thing I would do is turn on all the tags and look for unneeded content–stuff that doesn’t help with the work you need to do. Delete the stuff so it’s not bogging down your model. Move the remainder closer to the model origin. Also fix incorrect tag usage. Then purge unused content from the model