Tnarayan, there are a number of online services providing house plans and elevations........Google is your friend. Most of these provide stock plans and elevations that you can have modified for an extra fee. Some even provide custom designs, working with you for a truly custom plan...........however, none of them are free and you'll spend close to the same amount of money for custom services that you would spend with a local home designer or architect who will work hand in hand with you. Part of the design process is getting to know the client, their needs and the normal functions and working back and forth to refine the concepts........while it's not impossible online, it's more complicated. Another consideration is that while the packages on line are fairly complete, they are basic boiler maker packages and very generic. Your local designer will be able to include any special details or information required by the local permitting authorities as hopefully they already have a working relationship with the authorities.

Need to know the setbacks.

Best to consult an architect as I have said. Plot is a bit small to fit all your requirements in a single floor.