I don't think you would want to transition to a stone for the family room since that will stop your eye on the floor and make both rooms appear smaller.

I think if you can't get a close enough match, I'd probably opt for new wood, though that seems like a bit of a shame with a floor only 5 years old. Your current floor is gorgeous, btw.

Unless you can get an exact match for the existing wood, don't do it!

I can't tell where you would be changing/adding new flooring from the photos, or maybe it's there and I just don't know where, but you might get away with running the new flooring at 90 degrees to the existing flooring, using a wide transition piece. It probably wouldn't be noticeable then, because the wood would be reflecting the light differently.

I'm with Emily and she's quite right , the eye notices everything and that breaks the flow and continuity of a space if you went ahead with tiles ; But if you still go ahead with tiles do use the wood finished ones with a colour that is closest your existing floor colour , some days back In a Post by Emily she gave the reference of a wonderful Vinyl for Transition , that can also do the Trick
God Bless you
Vikrant Sharma Homez

These are old photos. The extension will be where the sliding glass doors are. My photos aren't the best, but they have started construction so I can't take new images.

I've attached a layout of the room. Brown is existing wood, white box is extension.

I think we will skip the stone idea. We are thinking about the 90 deg. idea.

- Do we use same wood with the slight changes?
- Can we use a different wood.
- Do we make the transition at the kitchen, or the edge were the two hallways are?

Thank you for any advice!!

I think that you should try to find a wood artist or restoration specialist who would design an interesting floor using your existing wood and the added/slightly different wood and perhaps another for contrast. Some design that would look intentional. For example, old apartments often had wood borders that ran perpendicular to the center--maybe you could salvage enough from the edges of what you have to so something like that. I've also seen beautiful designs, such as a starburst or compass, in different woods in floors--perhaps you could do this as a "rug" under your dining room table. However, a real artist would come up with a better idea. You would also need to consider where you think furniture would be.

An alternative is to search the net to find out if anyone has any of the original wood available for purchase.