Sudhir, the dimensions you've posted say things about the interior...but your title asks about the outside of the house. Pictures and floor plans help us help you. Please post some, OK?

I agree with divadeva. More lights. If you can add pot lights do it. If they're already there add task lighting and up the wattage on the bulbs on the pot lights (replace with LED and you can make them brighter because the wattage on LED is lower for brighter light). If you have all of that add decorative lighting. If ventilation is an issue find a way to move the air around or add air filtration. Maybe the HVAC is deficient. Maybe you can add a HEPA filter instead of the standard one that comes with the unit. Call an HVAC specialist to see if there is a way to boost air flow in the room.

Thanks One Plan for your recommendation. Would it be good to go for Herringbone pattern in hallway and in the open plan vinyl straight planks and then matching tile in the decking area. We have shortlisted karndean vinyl for open plan (Von Gogh Distressed Oak) althought not sure. Also what type of anti-slip material should I go for if I had to matching wooden look vinyl ?

hi I am buying a house n I need some vaastu tips on the floor plan .kindly help