Turn unfinished basement space into a fully finished bathroom your home actually needs. Properly waterproofed, built to last below grade, and finished by a dedicated in-house crew from start to finish.
A basement bathroom is one of the most useful upgrades a Mississauga home can have, whether it serves a finished rec room, a guest space, or a separate basement unit. But below-grade bathrooms face challenges the rest of the house never sees: concrete floors, lower ceilings, higher moisture, and drainage that often sits below the main sewer line.
Bathroom Renos has been building basement bathrooms across Mississauga, Port Credit, Etobicoke, and the wider GTA since 2004. Every project is handled by our own crew from start to finish, with no subcontractor handoffs, and every shower is waterproofed with Schluter Kerdi behind the walls and Schluter Ditra under the floor tile. What goes in under your stairs is built to last.
Whether you have an existing rough-in or you are starting from concrete, here is what we take care of.
If your builder left a three-piece rough-in under the slab, we take it from bare pipes to a fully finished bathroom: framing, plumbing, electrical, vanity, tile, shower, and glass. One crew, one fixed price, one timeline.
No existing drain? We design and install up-flush and sewage ejector systems so a full bathroom can go almost anywhere in the basement, under the stairs, in a corner, or as part of a basement unit, without tearing up the entire slab.
Basement bathrooms see more moisture than any other room in the house. Every shower is built with Schluter Kerdi membrane behind the walls and Schluter Ditra under the tile, tied into proper venting so dampness never becomes next year's problem.
Finishing a basement for family or a separate unit? We handle the full bathroom build with durable, easy-care finishes and a layout that makes the most of tight below-grade space.
Most finished basement bathrooms in Mississauga land in this range. Where your project falls depends on whether you have an existing rough-in, the size and type of shower, fixture choices, and whether an up-flush system is needed.
You get a detailed, fixed-price line-item quote before any work begins. No surprise change orders. See our full bathroom renovation cost guide for current ranges.
A few examples of below-grade work completed for Mississauga homeowners.
A full bathroom for a basement unit in a three-unit property. We replaced all the water supply lines and ABS drains, installed a new tub and a custom vanity, and finished the space in tile from SS Tile and Stone.
An underused basement closet became a sleek, modern walk-in shower. A tight, awkward footprint turned into a clean, fully waterproofed shower that fits the space perfectly.
An older basement tub was replaced with an open walk-in shower set over a linear drain, opening up the room and making the space far easier to use day to day.
A look at the walk-in showers, linear-drain installs, and compact-space builds we finish below grade.
"We couldn't be happier with our bathrooms and basement remodel by Nestor at Bathroom Renos. The craftsmanship and attention to detail in the finished space are truly impressive. Our new reno exceeds our expectations."
"Nestor Campos and his colleagues are talented and delightful people. Their attention to detail and quality of work are exceptional. He is organized, timely, and a great problem solver on site. We recommend them highly."
"They are amazingly professionals, always on time, and pay attention to a lot of details to end with a beautiful renovation. Also a really good price. Best company I ever hired to do something in my home."
Get a free in-home walkthrough and a detailed, no-obligation fixed-price quote within one business day.
