Outside the United States, you might see a bathroom designated as a “WC.”

The abbreviation stands for “water closet,” a 16th-century concept making a comeback in contemporary construction.

The enclosed space separates bathroom fixtures, offering an attractive feature for homeowners who desire privacy and practicality.

water closet toilet room in neutral bathroom

Credit:Paul Dyer

So what exactly is a water closet, and how is it different from a bathroom?

What Is a Water Closet?

A water closet is a small room within a bathroom that houses the toilet and sometimes the sink.

water closet toilet room in bathroom

Credit:Emily Minton-Redfield

by a wall or hallway.

Awater closetis a small room or enclosure with a toilet.

Water closets are typically located within a bathroom and separated from the sink, tub, and shower.

bathroom with mural painted behind toilet

Credit:Emily Followill

Why Is It Called a Water Closet?

When the water closet was invented, it was called the “wash-down closet.”

Over time, the name was shortened to “water closet.”

black white bathroom sleek shower

Credit: Emily Followill

The meaning eventually got lost as water closets and bathrooms were merged in modern home construction to save space.

Because of this, the two terms are commonly used interchangeably but still aren’t quite the same thing.

Is a Water Closet the Same as a Half-Bath?

toilet room with red wallpaper

Credit:Kim Cornelison; Interior design: Tish Key

Privacy

A water closet is a huge privacy bonus for avid hosts or those with large families.

Having discrete spaces facilitates increased comfort for those in need of the loo.

A water closet affords a much more efficient use of the bathroom space.

Other practical details, such as a water-efficient toilet, should also be factored intoyour project budget.

Remember, any major changes to your plumbing will need to meet building codes and regulations.

Check with local authorities and home contracting experts in your area before breaking ground on your water closet.

It might be small, but it’s capable of making an outsize design statement.

Don’t just settle for painting the walls the same color as the rest of the bathroom.

Instead, try abold, saturated colorthat complements the rest of the walls in the space.

A water closet is also a good spot for awallpaperyou love.

“A Brief History of The Flush Toilet.

“The British Association of Urological Surgeons.

Roller, Zoe et al.

“Closing the Water Access Gap in the United States: A National Action Plan.”

2019, Dig Deep and US Water Alliance, pp.

Goforth, Madison et al.

“American Journal of Infection Control (AJIC), vol.

2, 2024, AJIC.