Why aren't you showing us a current pic with all your changes?

Agree with posting current photos.

Are you planning to install a wood burning, gas or electric fireplace?

Your inspiration photo with a floor-to-ceiling chimney doesn’t work with the existing window imo. Consider eliminating the window. Or leave the window and go with a fireplace design that doesn't go to the ceiling as suggested by @la_la Girl.

Hi , give me a new picture

What are the dimensions in that space. It looks tight. Share more pics please.

Without specific measurememnts I don’t believe it can be done with the window there. I have the same question as la la girl ….. why don’t you want to cover the window? Seems like a very random location for a window.

Since none of the seating is facing a possible fireplace, why not put a large dramatic skyskape art work there instead since the window is also a problem? This palette would work since it echoes the rug. The blue above dramatically pulls the eye skyward to the window.

Across the Expanse, Original, Painting · More Info

More of the overall space would need to be seen, and a floor plan is greatly beneficial for good advice. A fireplace will "solidify" your furniture layout, whereas without it you have more options to move furniture around. So seeing circulation availability and proportions (both in footprint and more of the vertically skinny Living Room) to understand how a masonry fireplace with a hearth extension will jut into the space and also draw your attention to the space's verticality.

If you’re not willing to get rid of the window, which I get for light purposes, why not put in a clerestory window centered over the new fireplace.

If your reasoning is because changing exterior involves too much expense, you can cover over the window on the interior and still leave the exterior showing a window.

don't close off the window and do a regular FP with a mantel and add balance for the window with something on the mantel.

This abstract landscape comes from Great Big Canvas and the palette works well with your walls, furnishings, and rug.

You might make the entire wall your chimney: clad the entire wall in limestone tile or natural stone veneer, if the wall can take the added weight of the stone. That would give you the texture and color variation of the chimney but the fireplace and window would both be squares in the wall and wouldn’t fight each other. You could have a wood mantel across the whole stoneclad wall, and panel both the small half-wall at end of the wooden railing and the soffit. Bes Best wwishes for your projec!

The challenge, is the proportions if you go with a really wide fireplace. It will draw your eyes acroos not

If you want to go high you will need to cover or remove the window

Here is a few options for a cozy fireplace

Another option is to not do stone but a beautiful stucco. Like the arched fireplace adding texture and intrest

A fireplace in this location might be ill conceived.

Are you planning to watch TV in this area also?

If it's not a wood burning fireplace the FP can be vented directly out of the wall. No chimney required. You don't even need stone above the mantle if you prefer.

That window has to go in my book.

The fireplace doesn't have to be the same width all the way up to ceiling/roof. You only need to accommodate the flue up at the height of the window. So, your fireplace could be asymmetrical and bypass the window although it might be rather right. In other words the upper portion of the fireplace could slope on one side so as to bypass the window.

I actually wouldn't let the small window stop you. A floor-to-ceiling fireplace can still work if it's designed as part of a larger feature wall rather than as a standalone element.

I'd consider using textured stone or large-format panels around the fireplace and then adding subtle accent lighting to highlight the texture in the evening. That usually creates a much more expensive and dramatic look than relying on the fireplace alone.

I recently compared several statement lighting ideas and before/after living room transformations that might give you some inspiration for creating a luxury focal wall:

https://youtu.be/g-R98L8EdII