Keep it very simple. Avoid a mantel since the fireplace is off center. You might be able to avoid all the tile on the floor if you use only gas logs. That would be a much sleeker look.

These might give you some ideas.

Don't mess up the look by using a porcelain tile with natural stone. You don't need any borders or pencil tiles or outlines to distract. Continue up the wall to use the height in the room. But don't think you need to go all the way to the ceiling.

Do check with codes to find out if you can skip the tile on the floor by using gas logs.

Since your fireplace is off center fill in the blank area with a comfy chair with an ottoman to help balance the whole wall.

I wish you could post more photos of the whole room, and tell us about furnishings. I like the dark stone for sure. Agree, no mantel. I don't think you need a stone hearth with gas fireplace but I have several gas ones, and the fake coals and stuff they put in it to make it look real, does come out sometimes and it can get a bit messy. Nothing pops out, just from moving screen, etc., so for that reason, I think a 18" stone flat hearth would probably be a good idea. I need to think about how high to do the stone. It is a dilemma due to the off center issue. So, the question is "where do you stop"? Plus no mantel creates some questions. I do think you might be able to do some "floating" shelves in an asymmetrical pattern that would allow some simple décor if you wanted to introduce some wood. I would want it a bit darker than the samples you show.

In thinking about this, perhaps you could just do the floor right up to the fireplace wall and then come back in and put the stone on top of the floor?! It wouldn't be that much extra wood and you wouldn't have a interface that is difficult to get right. You can get large slabs for this purpose from pool stone places. Even black would work. That way you could do the floor and then do the stone later so you could plan out the fireplace wall in a more relaxed fashion. Fast, usually results in trouble, so be careful.

The posts above are on the modern side. If you wanted a more traditional look then you could do something more like this. This is El Dorado artificial stone so it's much lighter weight than stone. Looks very real.

I've never had any problems with particles coming out of a gas fireplace. It would look much better to have all wood floors if no hearth is really needed. Even if you prefer a hearth there's no need to extend it to the size of the original tiles you now have.

I agree with Flo, it would be helpful to see the rest of the room and how the fireplace will relate. I noticed that you have plantation shutters, which are typically pretty traditional. Are you steering towards a more contemporary look? The charcoal tile will give you this. (It's gorgeous BTW!). Not having a surround, it makes sense to to tile the entire wall to the ceiling. Visually, tiling the whole wall the darker tile will help disguise the fact that the fireplace is off center. Good luck!

Another thought, (sorry you got by brain going!) you could do a wood and stone asymmetrical approach to the wall that would be really neat. Something like this:

...Something like this: ???

Here is little rough sketch of doing the wall (colors are way off with camera, but imagine a nice wood of your choice on the left side and stone of your choice on the right) to make the "off center" fireplace feel "intentional" and part of a unique design.

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Then, a nice tall piece of sculpture or simple very tall, thin pot would decorate hearth and side of fireplace and balance the placement of the firebox.

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If you can get away with it I would eliminate the hearth in tile and just do the hardwood up to the wall. Flo has a great idea for handling the offset in the wall just need to ensure how close you are allowed to go to the fireplace with a flammable material. As for how high to go I think you should go all the way to the ceiling. Hope this helps

Right, I left about 18" (estimated of course) between stone and wood in my little sketch. The layout would have to be done with precise measurements of course. But totally doable. I would use thin stone but real stone, not tile. Unless you can find something that is really close to natural stone.

thank you everyone for posting. It kept telling me that it couldn't post at this time so I did not know it had gone through. I agree that the asymmetry of the fireplace is odd. I had thought about tiling the entire wall but then thought it might be too big of a statement in the room plus I wasn't sure what to do with the other sides and back of that wall. I love the high ceilings and want to keep a light and airy feel to the room. The fireplace faces the main part of the room and there is a pretty good sized area behind the fireplace also. I will try to post some pictures that give you a better feel of the room. Just keep in mind it is a complete mess right now with the wood, tools and stuff we have been storing there. The house has fairly traditional style however my personal preferences are more modern so I am hoping to blend the two. The house is great but needs pretty extensive updating which will take place gradually. The shutters were original to the house and are in good enough shape to use for now. The room is basically a blank slate. We have been using a smaller bedroom while waiting to do this room (took longer than I expected) and so I don't have furniture really planned out. My current bed and dressers are dark wood and not at all modern but will be used for the time being.

The fireplace is gas. The other fireplaces in the house have the gas logs but this one is empty. We would use a gas log or I don't know if we can switch to glass stones or something more fun. Right now they have a 2 foot tile hearth going the length of the wall. Way overkill but I think we need to have some hearth. I just don't know if we keep it right in front of the fireplace or extend the length like it is now. My husband thought it looked better in front of the entire wall. I am trying to find a house picture to show what I meant about a wood shelf type mantle but am not finding a good example. Similar to the 3 shelf picture posted above but a single shelf. I thought it might help balance it somehow. I'm going to post the pictures from my phone is a separate post

Yes, you could paint the wall the darker color and just do the stone but if you do that, I would minimize the stone and just do around the fireplace itself. Otherwise, it is going to look like you didn't want to spend the money on the stone, which won't be the best look! I don't think the wood "shelf" is a good idea. It is a more "traditional" look so if you want to lean modern/contemporary, clean surface is better. The ceiling isn't that high and if you did asymmetrical design you would not need as much stone, but that wall is screaming for all stone! I think your instincts (or your hubby) to do the hearth across the full wall is good, however, you will possibly get corner breakage so think about that. What would be really cool is a cantelievered hearth! But now we are talking money! It looks like your "passageway" will have folks possibly hitting those corners? Just think about that. The corners of tile or stone have a strong tendency to break. Even inlaid. It happens.

When you say asymmetrical design do you mean taking the tile up to the ceiling but not the full wall? Just the width of the fireplace? I am intrigued by the idea of adding wood on the other side but I am not sure about it. I like the charcoal colored tile but I think it is too much for the entire wall--too dark. I had only considered tiling either the entire wall or just a small frame around the fireplace. What about this other marble tile (posted below) for the wall or just around the fireplace. It is a lot of tile though if I have to wrap it around and do the other side as well. Not to mention there will probably be a TV hung on the other side. I don't have the sample anymore so I can't post a picture by the wall. And what about this other houzz picture with just a simple metal surround? I'm not sure about the wood going all the way to the wall though. I think that since I do not have a glass insert that I need tile on the ground. Its not the same statement as a floor to ceiling tile wall but still nice. I love the bottom houzz picture for a tile that looks great on the entire wall without overwhelming the room. The white oak limestone that I have seen before is darker than this looks though. In fact it is white oak limestone on the floor of the first picture I posted in this post. Does it look ridiculous if I tile the entire face of the fireplace wall but do not wrap it around and do the entire 4 sides? I'm guessing so.

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The natural edge on stone makes corners and edges easier too. There will be lots of options in stone in the colors you prefer. Quiet stone / low natural variation is available. Your room is contemporary because of the floating fireplace .. you could use your flooring wood up the left side as Flo suggested above and use the charcoal stone on the right . .that would be classic, stunning and a quick mock up would tell you if the wood and stone work well together.

There is nothing saying you have to wrap all 4 sides. You could just do the front or the front and 2 sides.

that is clearly an option, however, the dark would be much more dramatic. On the wood/stone combo, 15" is fine. Try to forget the current tile surround. You would have 15" either side and then it looks like about 24" more inches from that point to the left? Would you measure the distance left to right? Then I could do a scale drawing for you. If you want to. If you do the light stone, I would do it all stone. And you can do front and just sides. No problem, as Intrique Builders, Inc. has stated.

Just the face would be fine.

I think the face would be preferred to me.

I would not do the marble in the size you posted in the first set. I have seen it done (white marble like you showed), and, frankly, it looks like somebody slapped floor tiles on the wall. If you're going to use marble, use really large pieces, otherwise it looks like you got a deal in the bathroom section of the store.

I'd go with the dark grey porcelain ones. And don't forget to look for tiles with finished edges; you don't want to have to deal with raw edges.

Think twice about doing anything that makes the asymmetry more obvious.

If you do stone go face floor to ceiling.

Okay, I'm still looking. I found this option.

Looks good. Are you thinking of this with the wood or just by itself?

If you are doing this stone, you will have dust on every little piece that sticks out. I prefer the flat surface and it is more contemporary as well in design appearance. I like the colors though.

OK, progress! The stacked stone are kind of going out. So the flat limestone look is more contemporary look, which I believe would be more "lasting" look. The biggest challenge with the long tiles is "lippage", but since you are doing it on a wall, that might not be as big an issue. However, getting a really flat surface is essential to getting the grout lines thin and joints right. Check the manufacturer's recommended layouts because generally they don't want a "brick" layout but rather a random or a 1/3; 1/3; 1/3 type layout. This help conquer the warping you get with long tiles. Also MAKE SURE THE TILES ARE 'RECTIFIED'. That means very straight side edges. Good luck! That is very pretty tile! (the bottom one not the stacked thin ones.).