Hello Chetan We are practising architects from Mumbai, India and we have 100 readymade house plans on our website. You can check our site www.homeplansindia.com If you want we can even do custom house design for you and our Pricing is mentioned on our site. Thanks & Regards Ar. Rinka

Building a duplex house plan is a good way to start small in multifamily housing. The blog Guide to Finding Your Duplex House Plans is helpful in selecting your construction plans. http://www.houseplans.pro/blog/post/finding-right-duplex-house-plan

I have not specifically looked for modern, but you can try houseplans.com and you can filter your search. Also try a google search for contemporary house plans. I am sure there are multiple sites out there.

When you use the term "Duplex", you mean that it is a two story house, correct ? In the USA, the term "Duplex" means two separate living units side by side......but in other parts of the world it means a two story residence. Please clarily that you are talking about a two story single familly house...... If so, the footprint that your house will have on the ground floor will be approximately 1000 square feet. Do you need to park a car on the site or is parking offsite? If the parking is offsite, then you have lots of room for a two story, 1800 plus square foot house. The design will be dependent on your personal criteria, and it would be helpful if you could hire a local architect to help you with the layout of the rooms. It should be relatively simple once all of the factors are considered.