The phrase "bathroom apartment" refers to an apartment or living space that only has a bathroom, but no other rooms like a bedroom, kitchen, or living room. Full definition
2 Bedroom / 2 Bathroom Apartment with full kitchen / laundry facilities, separate lounge / dining area, balcony and ensuite. (world-blue.com)
A well appointed two double bedroom, sitting / dining room, two bathroom apartment in an 18th century building, with external patio, table and chairs. (romanhomes.com)
This 2 Bedroom 2 Bathroom Apartment features a stylish and roomy lounge and dining area flowing onto your private balcony. (mantrahotels.com)