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.

Hi Prabha. Thanks for the reply. Please see rough sketch as attached. Plot is 22 x 10 m.

you said its east facing, i assume the entry in that plan is facing east. structurally, vastu is ok, but there are errors in room placement. bedroom must be in sw corner and kitchen must be in se corner.bif its not master bed room, then dining can be moved to sw, but kitchen must be moved to se.

first thing, after you enter the door obstruct the stair and circulation, then the single seater sofa also is lying just in the middle of the main passage, then the toilet just adjoining the dining will affect the ambience by the foul smell, and the kitchen as well needs rethingking since there is no space for preparation.......so in short there are small things that needs to be considered functionally along with the planning.....