what is the minimum area needed for a full bathroom
7 Awesome Layouts That Will Make Your Small Bathroom More Usable Small Full Bathroom. Dimensions: 40 square feet (5â x 8â) Fixtures: Sink, toilet and tub shower combo or luxury shower. A full bathroom usually requires a minimum of 36 to 40 square feet. A 5â x 8â is the most common dimensions of a guest bathroom or a master bathroom in a small house. If you happen to have this standard-sized small bathroom, there are two different layouts you can consider.