How Much Does it Cost to Add a Bathroom?
- On average, adding a bathroom to an existing space costs $15,000 or between $5,000 and $35,000.
*Using existing space costs 40% to 60% less on average than adding space on.
- Adding onto your home with a finished bathroom costs $20,000 to $50,000 on average.
- High end additions, like a master bath or with more space for a spa like feel, can run $75,000 to $90,000.