Hello Sir, I do not understand- what do you mean by "changing the wall Designs." For coloring/wall papers/textured painting it is better to have finished wall. For wall cladding/tiling it is OK to have a non finished wall as well as they require a rough surface. For changing the tiles, its quite a messy, and wasteful expense. Rather, you can give the tiles of your choice to builder to install on the first go itself. Some builders don't allow such requests but others would happily do so. Some others may even offer a discount for not using their tiles. Same thing with paint as well you can give your colors to them to paint if you are not happy with white. Thanks, Nitin CORNERSTONE DESIGNS Bangalore.

I mean cost efficient way can be adopted to finish room floor and wall

Ashish That is a nice idea. However if you are going with light walls, I would say go darker with your furniture colour. If you use white or off white wall colour, go with a darker grey sofa. Though not very dark but at least 2-3 tones darker than your walls. Go with khadi texture on sofa covers. It looks very nice and is quite trendy. https://www.houzz.in/photos/vikram-phvw-vp~280 Something like this is a good option (regarding colour and texture) Mounting the tv on the wall is also a good option. What i will ask you to change is your coffee table. Replace it with with a glass or a wooden nesting table. Go for a set of 2 round ones with walnut polish (if it is wood) .Keep a small dari rug under it. use you wall paper on the wall on which you are mounting your tv or on the wall directly adjacent to it. separate your dinning and living areas.

You can remove the tiles first, then you can do 3d epoxy flooring on your floor. From CHATTERJEE WALLPAPER Contact no- 9038442716 Kolkata, West Bengal