I think the previous posters have got most things covered.
As to street lights, if its a new estate the local council will have all the plans online inc road layouts etc.
A few extras to consider, shed, does it come with one, if not try and get them to put down a hardstanding for one.
Our TW has kitchen units by Hewsons, I'd like some extra shelves, but Hewsons only deal with builders, try and get some extra shelves.
Has it got any paved areas ie patio, ours has and we've got a few cracked slabs, try and get some spares as you may not be able to source any if they need replacing.