Adding Bathroom To Outbuilding . H901, 25 feb 2016 #7. This is ideal when you want to use your building all day as a garden office, art studio or hobby room and if it’s a fair distance to the house. 30+ Enchanting Bathroom Ideas By Adding Wood Accents Rustic bathroom from www.pinterest.com Joined jan 30, 2012 · 10 posts. Pump stations start at about £400. As that pressure drops, the pump switch at the pressure tank will turn on the pump.