In some subdivisions, the developer's landscape guideline would even监管後园绿化,有些也要求有草坪才作合格论,better check details of the guidelines if you wanna successfully get the deposit back.遇著有等LANDSCAPE INSPECTORS非常刁难,you will have a hard time.
Just make sure the grading is fine ,if not, you have to re-do the grading/sod. It is always the responsibility of the homeowner to keep grading in accordance with the city's requirement, so it makes no difference wether settlement happens in 1, 2 or 3 years.