Custom Plumbing
“Excellent service and performance - they are responsive and stand behind their work - only plumber we use in Sarnia”
Best Bathroom Renovation Contractors in Sarnia, ON
10 companies listed · 9 in Sarnia · 4 open weekends · 8 rated 4.5+ · 2 show a licence
Data verified October 19, 2026
Anderson Braga Drywall Service & More
“Pleasant to be around, and treats you with the up most respect.”
Diamond Care Renovations
“All I can say is that I was impressed with this team from our first conversation to end results.”
I Hate My Bathroom
“I had my bathroom redone and couldn't be happier!”
Boase Design Interiors: Renovation Design and General Contractors
“They transformed our kitchen/great room with a stunning island, hardwood flooring, kitchen ceiling and installed wooden ceiling beams in the great room.”
Barker Renovations
“Barker was amazing on Job .”
Listed for homeowners in and around Sarnia, ON, these 10 companies remodel bathrooms, including basement bathrooms and the venting problems that come with them. Each card repeats what the company says about itself on its own site, and the reviews underneath it were left by customers.
Area overview: Sarnia, ON
9 of the 10 companies we list are based in Sarnia; the other one serves Sarnia from Chatham-Kent (45 km). The companies on this page are rated from 4.0 to 5.0 across 116 reviews; 1 has 50 or more reviews and 8 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (93%), responsiveness (85%) and punctuality (83%). 4 are open on Saturdays and 2 on Sundays. 2 show a licence on their websites. 1 offers emergency call-outs; 2 give free estimates and 1 is family- or locally-owned. We have a website on file for 6 of the companies on this page; 6 publish a contact page and 3 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Do any of these crews work on Saturdays?
Saturday or Sunday hours show up on 4 of the 10 listings here. That often means the office answers, not that tile is going down. It matters most in a one-bathroom house, where a Saturday of curing time can pull the whole job forward by days.
Custom Renovations
“Great communication and a very timely finish.”
Royal Renovations Sarnia Inc
“I had a shower put in my bedroom closet it was done first rate in love it steve and his staff were very professional and nice did an awesome job”
Ultimate Bath Systems
Kevin Vreman Construction
“From start to finish, Kevin and his entire crew did a wonderful job completing the near demolition of our existing "cottage" to transforming it into our beautiful home”
Why these companies made our list
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