None. The house was built like a ship. Every inch had a purpose - sometimes two.
The artist who thought of transforming the little coat closet by the front door into the half bath had owned this house prior to my buying it. A carpenter - he had lovingly restored the house to its former glory, and had transformed some spaces (like the kitchen) into highly functional works of art.
So I contacted some plumbers who, after seeing the available space, said I would need to get a plan approved by the City or they wouldn't touch the project. I think they may have had doubts... I persevered. I found a corner toilet on line. I found a cute little sink on Etsy. I found an adorable faucet on Amazon. I made a plan. I went to the City.
Plan approved! All I needed was to get a building permit, a plumbing permit, an electrical permit, and - get this - a warm air permit. Seriously. For the bath vent. Whatever. Work commenced, inspections happened, the little bathroom took shape. OMG it's cute! Truly. I'll admit I went a little overboard with the cute factor, but the room is tiny, so it works.
And so it works. New little bathroom, tucked away in what had been meant to be a coat closet. The coats will get over it.