All builders have a tendency of delaying projects for some reason or the other. It has happened in the past. Hence, suggest one should keep about 6-8 months aside as buffer time.As far as I know, Kolte-Patil isn’t facing any legal issues and they’re known to provide fairly decent construction quality, generally within good time.
So no need to worry. I think one could trust Kolte-Patil when it comes to basic facilities like timeliness and quality.