I had one of these in my home and bricked in the door way leading from the master bedroom. My thoughts 1. I didn't want to see a messy bathroom from my bedroom.  2.  I didn't want visitors peeking into my bedroom when they were in the bathroom.

I haven't sold this property on yet but don't see how bricking in one door way would decrease value.  (I don't think the decision would add value either, just aesthetics really.) 

I may consider adding an ensuite bathroom to the front of the house (where the master bedrrom is) and extending the roof line prior to sale.