Nice job! Being on the last leg of the reno of the 3rd (and last) bathroom in my house, I can appreciate that sometimes there are things that do not get the attention they should have initially. Like not noticing that the old toilet was centered 16 in from the wall and to remedy that the sick had to move which meant that the door wouldn't close etc etc etc.
However, having looked at your pics and consulted with my project manager, we thought that you could look for something to put where you have the little freebee. It could be a one piece unit or a base either cupboard or drawers and a top that matched style wise. You could even place the little one you have on top, with or without the legs. Paint it whatever colour suits you. You could even hang the little one over the toilet tank ( too crowded for me ) or on the adjacent wall , if it didn't interfere with the toilet. In any event, I think the space between the windows is perfect as long as its clean , neat and eyepleasing as I infere from the pics that that is the first thing you are going to see when you enter. IT's amazing what a non-descript bureau or cupboard can look like with a couple of coats of melamine paint !
The Boss offered the suggestion that if you need storage for hair products, portable hair dryer etc, after years of struggling with cupboard storage, mess, things falling over, etc, she finally started using a large basket that she keeps in the closet in the adjoining room ( sometimes ) . Everything is close to hand, easily portable and actually doesn't look bad if left out .
Good luck with the rest of the transformation

How come I never find things like that sitting on the street? It's cute. I agree that the space between the windows is the best spot for an attractive storage unit.

where are the towel bars? You could add hooks or bars on the back of the door.

I love what you have done with your bathroom. Shows how far some ingenuity will go! Congrats.

As in many bathrooms the floor space is limited so look up. You can do a series of open shelves up the wall behind the toilet. Higher shelves with nice baskets can hold extra paper products etc. Towels can be stacked and lower shelves hold a basket or two for cosmetics, hair product etc.
Hard to tell what space there is along the wall to the right of the sink- but assuming there is at least 2 feet you can install a railing (Ikea) system generally used in kitchens to hold utensils, paper towels etc . You buy a metal rail attach it to the wall and then get S hooks to hang things from. My daughter has one in her bathroom and used the hooks to hang 4 pretty metal pots (originally intended to be flower pots. Each pot holds a different category- one for hair things one for eye makeup etc. Very cute and only intrudes into the room a few inches.
Finally you have tall ceilings so don't overlook the space above the door. A shelf running the length of the room above the door is perfect for extra linens or other seldom used stuff.

On your sink wall, I'd have done a wall cabinet that runs the entire width of the wall, with a light fixture in the wall over the sink, above the cab.

You can also get taller cabs that are still only 10" deep, to replace the shorter one you have by the window. Use an L-bracket to bolt it to the wall to prevent tip-overs, though - very important!

I agree with blueberry- floating open wall shelves over the toilet to hold folded towels and basket of "stuff". that's what we're planning in our master bath reno.

Also- I'd build a custom unit between the windows, with open shelving above and a cabinet below. We did this in our oud house (1926 foursquare) using inexpensive materials, just lumber and the same beadboard as we had on the walls. In your case I'd make it shallow- like 12" or less, probably!

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Hey, we are bathroom twins! Ours needs some finishing touches, but we also used unglazed white hex with black accents, white beadboard, and blue wall paint. As if that wasn't similar enough - we found our clawfoot tub on Craigslist, too!

As for storage, I have been keeping my eyes peeled for antique shelf brackets. My plan is to mount some shelves above our toilet for towels, extra TP, etc.

Thanks for the suggestions -- I'll definitely look into installing some shelves above the toilet. I particularly like the suggestion to use antique shelf brackets; I always thought of floating shelves as sort of too modern looking for the era of the house, but adding older brackets will give it that period look.

Stacey - I love that built in. Great idea to use the beadboard for the cabinet door.

We still need to get a towel rack and a toilet paper holder. Among that last nagging 1% that we haven't been able to quite finish. I've been trying to find something to put between the sink and the wall (to the right of the sink) but there is only about 10" of room. The entire bath is pretty small; I want to be careful about it starting to feel crowded.

What about something like this:

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or

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This site is pretty expensive, but you can find similar elsewhere, including craigslist and ebay.

Here is a link that might be useful: Rehab Vintage