Being able to build your own house is a wonderful opportunity, and when you should be able to customize it best to your own personal needs. So you'd need to be more specific about your family & lifestyle .. how many bedrooms & bathrooms do you want/need? How old are each of the family members? Will the house be detached, semi-attached or attached .. which controls window placement? Do you have a casual or formal lifestyle, want individual rooms, or open concept? Does family do a lot of cooking, and have activity revolve around the kitchen? Does that "triplex" include a basement and/or garage? Bottom line, is that "the best ever designed plan" might be totally different for you, than me, so a designer needs more details from you!

like so (sorry took liberty with your pic using paintbrush app). in second tv be installed on an island of a solid wall, remaining wall be of glass: use frosted tempered glass for doors n all.. this way you get another expanse of wall to do loads with n utilize full potential (area) of room.. also providing a wall surface on the back of the tv 'island' wall to the sitting area for say a painting, maybe? plus tehre won't be glare on the tv screen either if it's on teh wall-glass partition.. only issue being the slightly longer approach (i-e through dressing room) to bathroom area, which ain't so bad either.. in ur original plan i don't like how a door is sprouting out in the middle of a great expanse of wall... what a waste..

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Hello Monika, I must say that concrete wall is fantastic! I see a large planter with a large leaved plant there.. I like Jonathan's idea, off white or shades of cream for the remaining walls and ceiling or even a subtle stone colour.. Then we need to talk textures! I think the sofa could work if you move it out a bit from the wall and layer it up with throws and add a couple of lovely cushions.. Warm woods would be nice too to balance the room.. Have you considered adding concrete to other areas of the home? There are some fantastic concrete chairs available both as a chair and bar stool.. Could be fabulous to compliment this room.. Cox and Cox did some pendant lights that were concrete with a warm edge detail.. You could create your own arrangement with a 5 wire ceiling rose and hooks.. A glass topped coffee table could be nice too.. Have a look at eBay or vintage shops.. Oh and one more thing... You can if you like the concrete wall find wallpaper for another room say that resembles what you have in the living room or even marble! It's fabulous and a feature you want to make the most out of! :))