Full bathrooms have a toilet, sink, shower, and bathtub/shower combination or a separate bathtub and shower.
Most homes will have at least one full bathroom. A full bathroom is versatile and valuable, packing many functions into a relatively small space. It is common for low- to mid-priced two-bedroom homes to have one full bathroom.
A master bathroom is one that is connected to the master, or largest, bedroom in the house. A master bathroom is also called an en suite bathroom or an attached bathroom. Typically, the master bathroom is a full bathroom or a three-quarter bathroom.
A door permits entry to the master bedroom, then a second door opens up into the bathroom. In a few instances, that second door is left off. If this is the case, the toilet is enclosed in its own space with a door for privacy.
Three-quarter bathrooms have a toilet, sink, and either a separate shower or a separate bathtub.
As more bathrooms are being built and remodeled without bathtubs, this third component tends to be a shower. In this sense, the three-quarter bathroom and the full bathroom designations have begun to merge with each other.
Half-bathrooms are also called powder rooms or guest bathrooms. Half-baths allow more privacy to the homeowner, as visitors can use the toilet and wash up without entering the bedroom areas. Also, since full bathrooms tend to be more personal spaces with garments and medicines, visitors never need to see those items.
Since half-bathrooms are more for brief and limited use by visitors, they usually have only a minimum amount of storage space.