"Not one for the Ladies!" (yet)
Well maybe for some of the more adventurous ones; there aren't too many private houses with urinals fitted, but don't let that put you off; public houses have them!
The house does need some renovation anyway so the loo is probably one of those things you were going to do regardless of its current deficiencies or the fact that it's in the patio. I can hear a few men saying so what; I've peed in stranger places! Probably even including a wardrobe whilst still a student!
A little imagination and investment will see this house transformed into a former glory it perhaps never had, but had always aspired to. You could be the one to realise its dream!