Adding a bathroom to a basement in Ontario: cost and plumbing
Adding a bathroom to a basement in Ontario costs about $15,000 to $22,000 for a finished 3-piece and $20,000 to $35,000 for a 4-piece in 2026.
Basement Renovation
Adding a bathroom to a basement in Ontario costs about $15,000 to $22,000 for a finished 3-piece and $20,000 to $35,000 for a 4-piece in 2026.