Hello Lina! I can’t wait to see what you end up choosing for this space - it is lovely. I agree that neutral upholstery is the way to go, introduce colour with color with throws and cushions. A vintage French leather club chair or two would look wonderful in this space too. I love this look by Brooke Giannetti at Patina Farm. Cheers, Susannah

take the lamp with the yellow shade and set it on your end table. It will give you a feel for size. Im not sure you can go much larger on the end tables might start to get stuffy. Also, do you have floor out lets? IMO, not at pro. But I think that whole back wall could be better sorted. maybe a sofa table behind the could be a better place for lamps? OR maybe a long narrow console table on the back wall. move your art around and put lamps there?

Thanks for the replies! I've updated the floor plan in the original post to have the windows. Here's a link to a video walkthrough of it in its current state. https://photos.app.goo.gl/hf2117gjeGXEs42Y6 The building was built in 1986, so building code was much less stringent then. On the kitchen side there is roughly 30" between the two properties, but there is an overhang on the upstairs unit that covers the area where the windows on that wall are, so very little light gets in. There may be more than 1' on the other side, but it's so close that minimal light gets in as the other property is also two stories high. Skylights won't work as this is the lower unit with an identical layout above.

Nice size room! I’d move the sectional and rug closer to the TV. Then on the part of the wall between the sofa and patio doors, you could put a unique tall cabinet or a sideboard with a large mirror or painting on it. You could even leave the decor on your wall, just move it where the mirror is now. You could also add a slim desk and a chair with a lamp behind the sectional or with a couple cubes underneath to fill the space / add extra seating.