I’m not a designer but the fireplace seems very undersized/overwhelmed for the space.

Bumping this up so hopefully a professional will weigh in.

Looks like it was planned to be both living room and dining room. dining room adjacent to the kitchen to divide the kitchen from living room.

Impossible to make suggestions without seeing the style of the home. Looks like it might be contemporary farmhouse style.

If you're going to watch TV in this room then you only have one location for a large TV.

An arrangement like this might work for the room.

I would not keep the shelving units white. I would paint them out with the walls.

Some option for layout

Replace fan with a chandelier and it will reflect in the mirror.

Using the 13' x 17' measurements the room can handle a 30" mirror.

Paint the bookshelves the wall color in semi-gloss. That will help disguise the different in size.

When you get your rug and furniture paint the mantel something other than white. Using @Celery. Visualization, Rendering images, I would consider a black mantel.

The mirror is doing you no favors.

Or do not block the windows

Or sofa, facing TV

I think smaller wall art would look better

Thanks everyone for the suggestions!! The fireplace is double sided so removing it is not an option. We’re just finishing up the other side and this is an image of that one — it’s an extremely slim mantel/side profile because the opposite room is quite narrow. Style of the house is definitely black and white with natural wood tones throughout, some light grays in certain rooms and lots of greenery. Agree the fireplace is far too small and that mirror is way too large. We’ll likely extend the mantel to the sides of the built ins so it looks more suited for the space.

The other thing that may be hard to tell from photos is the mirror is recessed a few inches back. So we’ve toyed with the idea of having the mirror removed, then painting the cutout part black and doing a natural wood chunky mantel below. Art in the space above. Any thoughts on that?

Would be hard to do a sofa on the side opposite the windows as it’d block the walkway. Love love the ottoman idea as it provides more seating if necessary without feeling massive on that side. Also agree with the TV needing to go on that wall opposite the windows, thinking of doing the frame TV so it’s super matte and can be turned into art when not in use.

Wall color will be off white throughout this room because the kitchen is connected and we’ll be doing darker cabinets in there.

Appreciate all of you taking the time to help :)

the mirror reflections may be too busy visually