replace only the narrow hallway vanity located in the central corridor directly across from the front entry door and outside both bathrooms do not modify either bathroom remove the hallway sink cabinet and install a side by side washer and dryer in that exact hallway niche the washer and dryer should face left toward the interior wall keep all bathrooms unchanged maintain existing flooring and wall finishes add a countertop above the machines and upper cabinets for storage preserve hallway clearance and scale add the doors in front of the washer and dryer