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

How are the house plans coming along? I'd suggest planting trees and making a living wall so you have something beautiful to look out on instead of a 40 ft 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

If furniture is all against walls a room will tend to have a flat, square, uninviting appearance. Even when placing a sofa "on the wall" you would want 3" inches space so the sofa won't rub the wall. The important thing is that furniture groupings facilitate conversation. Try moving your sofa out from the wall, if you don't like it, you can always move it back. :D Best wishes!