The dimension that you are mentioning is quite big. Ensure that you place the couch atleast 20ft from the television. That distance will leave a visual impact and you will enjoy the viewing experience and also ensure that your eyes don’t get affected.

What can we do to improve the wall which goes through the stairs. Can we have a projector for the wall with white screen railing ? How does it look. Or any other better ideas to do something ? We have some place after climbing stairs for a small sofa.

Hi Biplab! It seems you're asking "professionals" to do their job for free! This is a complete home design, not just a design dilemma. Request you to hire someone locally near your place who can personally visit the site and can help you out in a comprehensive way! Cheers and good luck! 🙂

Hi Riya You can use the existing slab on the left and create a crockery unit with a glass door. I would suggest that you float this unit a few inches above the slab so that the slab top is also usable for keeping kitchenware. You may also create open floating shelves or an appliances cabinet if you plan for electrical provisioning on that wall.