On average, adding a shower to a half bath costs between $3,500 and $10,000. That’s a wide range, I know—like the difference between a pizza party and a lobster dinner. The final number depends on how fancy you get and what your bathroom is already hiding.
If your half bath is tiny (and they usually are), you might hit that lower end with a simple corner shower kit. If you want custom tile, a rain showerhead, or a steam feature, you’ll sail past the high end. Your wallet will weep, but your skin will thank you.
The Plumbing: Where the Magic (and Money) Happens
First up: plumbing. This is the biggest wild card. If your half bath already has water lines nearby, you’re in good luck territory. Adding a shower drain and hot water supply might cost $1,500 to $3,000.
But if the nearest pipes are a cross-country hike away? You could be looking at $4,000+ just for trenching floors and rerouting pipes. Imagine paying for a first-class ticket for water—that’s basically what this is. Pro tip: have a plumber scope it out before you buy any tile.
