I can't see from the pictures but look at the grain and natural coloring. You can find species pictures online.

Each wood takes stain differently so be sure to test first.

Thank you for the tip. I am going today. I'll try and get a decent close up to compare.

So what does the type of wood have to do with it?

Geoffrey, I don't know if it does or doesn't. This is all new to me. I know that the floors need to be sanded or buffed and protected. Maybe a stain.
I didn't know if different woods act differently, prefer different stain and prep.

More photos of the floor. First two are the fancy living room. Last one is the master. All three bedrooms look pretty much like each other..
The front rooms are bleached and stained a lot.

Youre floors are Red Oak. Was there carpet at one point covering the floor?
Id be very cautious of doing just a buff n coat. Mainly thinking whatever finish is on currently wont adhere properly. Plus wont take of any deep scratches.

Red Oak sands and stains nicely. Will probably require some elbow grease to remove old finish as in my experience will probably gum up the paper pretty easily.

Nice looking floors. Somebody put somevreal effort in installing it.

Thank you for the identification.
Now I know what I'll be working with.
I am unsure if there was ever carpet on them. The house has been empty a few years. We are about to put in a bid and hopefully buy it.

I like to know what I have to do before I make final decisions. :)

Our current living arrangement allows for us to do the floors over several weeks before moving in. Or any other work that would be better done with no occupants.

Do you think we should go for the stain color that the mantel is exhibiting?

Youre mantel looks like whiteoak to me. So going natural on the floor will look close but not perfect. Your floors are going to exhibit more color variation.

You could stain it. Its up to you. But if you have the budget/time sand the floors. Start fresh in your new home!

Be aware that in some pics it looks like you might have some stains in the wood. That may or may not sand clean.

From a distance the wood looks like White Oak, based on the amount of color variation. In the closeup it look more like Red Oak. Dura Seal Golden Oak or Chestnut would look nice. Freshly finished Red Oak looks nice in natural color. If you use oil poly, I'm not crazy about how Red Oak turns orange/yellow with age. If you're curious whether it ever had carpet over it, look for tack strip holes on the perimeter.

It looks like a very nice floor but it would be best to resand it while you're not living there. I am a bit worried about the splintered edge at the corner in picture 5 and whether the stained areas in the dining room (?) would sand out. You might want to see if you can get some carpenters glue under that splinter before sanding. If the stains don't sand out, staining the floor might help obscure them. Once the furniture is in place, it will be a minor issue overall.

Yes, I noticed the splinter in the photo..didn't notice it on the floor though when looking at it.

Thank you all for your advice and information!

I know it will be a ton of work, some long weekends and after work hours.
Before we move in. But worth it to bring those amazingly crafted floors back to life!

I don't think the mantel is original to the house.

It's definitely not the 1940s-50s style.