In a smallish bathroom it makes sense to align all the plumbing fixtures along one wall.

Thank you all for your reply ,much appreciated. Since the size is rectangular I feel more of modern look. I would love to have a Victorian or a classy look though. Also I am allowed to construct roughly around 1800 to 1900 sqft. The plot entry is from the width(10sqmtr) side, so some more restriction. I am from Mumbai (India ) , the climate here is kind of extreme.Though the coolest can go max to 10 degree Celsius and the hottest can go max 45 degree Celsius. This will be my dream place where I would like to call in friends and family, though there is no pool , I would like to have a plunge pool kind of at the rooftop.A small sitting lounge to entertain guest. Sine it a small size , I am limited to doing all this stuff mostly at the roof top. Please advice.Thank you

Put the sofa on the 12' wall, and the TV on a credenza against the 8' wall. My living room has an 8' wall where the room extends out creating a covered entryway. The room is 13' wide and 16' long so our TV has always been on that wall, and it's worked very well. The couch is in the middle of the 16' wall.

See Houzz Photos for "row house" or "townhouse" for ideas of how to fit living into relatively narrow spaces.