Thank you roj leather and Simon for your recommendations. I like the hanging chair and the almanda creeper on the wall. This will certainly liven up the patio.

There is contrast between the traditional furniture and the focal point of the floor which pops, draws attention. I would recover the sofas in cream colored soft fabric - suede. I would leave the curtains grey, and put down a large neutral area rug. The edges of the room would show the pattern of the floor. I would color the wall and add texture to it, but not too dark as the room will appear smaller. Add a picture and put a nice plant holder, large vase in the left corner of the room - an oriental-style vase. Or, a cream-stripe fabric on the sofas. You could go soft or bold in this room - depending on your taste.

Consider composite decking material which are more durable.

Hello Mr.Rahul. in my opinion Its absolutely a perfect idea to have small or mid size pool on terrace . if your ok try this company called.. Smart pools. They have a Pre fab pool system which can be placed on existing terrace areas without any hassle of civil works. if not even a conventional small sized swimming pool with deck can be built with Proper planning and execution. Existing building structure should be analysed for the right placement. i dont forsee any major structural issues if designed well. Thanks