I own the 1st floor of a 2-storied building. The ground floor being occupied by one of my close relative. We had been sharing the same entrance to the house till now. But due to some personal problems there has been a need to change the entrance to my house (i.e. the 1st floor). I have to construct a staircase in the front side towards the left side of the building. I am also planning to extend the existing drawing-room ( to the extreme left side of the building, as seen in the Photograph, attached) filling-up the open space, as seen in the photo. Please help me out to redesign the entrance and the extension of my Drawing room.

Photos of the exterior and then the dilemma of living, kitchen, master bedroom would be the way I'd tackle it. Paint all walls in a simple background color that works with everyone's furniture - a warm off white would do it. Scrubbable paint in the kitchen and baths is a must. Do you have carpet or hardwood or other flooring? Carpet is acceptable for most rentals but will have to be cleaned after each departure. Don't forget safety requirements like smoke detectors and fire extinguishers.

Awesome! Hire an architectural design firm in your area.

As it's a North facing house, I would suggest keeping most of the openings to the north, will illuminate your house beautifully and will lessen your electricity bill. A duplex will be suitable according to the area and requirement. That will allow keeping a lot of open space which will give the feeling of being in even larger space than it really is. I hope it helps. I could have suggested more if I knew more about the project.