If you want to highlight the staircase wall then your could use earthy colours such as a yellow ochre! The wall could be enhanced even more by using suitable frames and making a good collage composition for all the photos that you have (I can see many lying on the dining table). This colour would match well with wooden furnitures

The amazing thing is that you have the luxury of approaching the architect about these issues. Laminated glass should address the security along with any alarm or security system you plan on installing, though the laminated glass may have size limitations. Regarding the waterproofing you should contact the architect, contactor and waterproofing subcontractor, or see about hiring an independent waterproofing specialist who can detail and warranty the condition. As a design consideration, make the lower area a garden or gallery or sculpture area and upper should be all glass. Maybe a garden roof there too if accessible or visible. In any case looks like an amazing place!!

Hello there, The slate claddings needs wall washer illumination. Please do that first. Place a wooden block above washing machine and cover it with wooden slats. This will double up as an iron board and a curio desk as well. Coming to the basin it is best to put a half pedestal over the niche and install a vanity mirror with storage for daily essentials. Regards, Aurum Ideas and Spaces Bhubaneswar

If you like to keep the traditional look, bring in curtains, paintings and more lights. Repainting the walls will be a good idea as it can create more freshness. Try a feature wall with red or maroon paint or wallpaper that compliment the flooring. The book shelf can be changed to something wooden. Or If you want a contemporary look, choose wall mounted / floating book shelves.