TMS Builder & Ton Mar Cleaning
Built on Craft, Driven by Quality
A GTA-based team of builders, plasterers, and cleaning professionals with over 15 years of experience delivering premium results for homeowners and businesses.
Our Story
TMS Builder was founded in Oshawa, Ontario with a simple belief: every project deserves the same level of care and craftsmanship, whether it's a single crown molding installation or a full commercial build.
Over 15 years, we've grown from a small finishing crew into a full-service construction materials and specialty plaster company — adding Ton Mar Cleaning as our dedicated cleaning division to serve clients from the first nail to the final polish.
Today we serve the entire Greater Toronto Area, bringing the same hands-on attention to detail that built our reputation in Oshawa to clients across Toronto, Mississauga, Brampton, Vaughan, Markham, Pickering, and Ajax.
15+
Years in Business
500+
Projects Completed
8
GTA Cities Served
2
Specialist Divisions
What We Stand For
Our Values
Craftsmanship First
We never cut corners. Every installation, every plaster coat, every clean is done to the highest standard — or we do it again.
Honest Pricing
Clear, detailed quotes with no hidden fees. You know exactly what you're getting before we start.
Reliability
We show up on time, communicate clearly, and finish what we start. Your project timeline matters to us.
GTA Expertise
15+ years working across the Greater Toronto Area means we understand local building standards, styles, and client expectations.
Two Specialist Divisions
TMS Builder
Construction Materials & Specialty Finishes
Crown molding, decorative trim, Marmorino Venetian plaster, ceiling medallions, and specialty construction materials — supplied and installed across the GTA.
View ServicesTon Mar Cleaning
Post-Construction, Residential & Commercial Cleaning
Professional cleaning services for new builds, renovations, homes, and businesses. Trained teams, eco-friendly products, and flexible scheduling.
View Cleaning ServicesServing the Greater Toronto Area
Based in Oshawa, Ontario, we serve clients across the entire GTA — from Toronto's downtown core to the surrounding cities and suburbs.
Based at
2550 Simcoe Street North
Oshawa, ON L1L 0R5
Phone
437-314-2315Hours
Mon–Fri: 8am–6pm
Sat: 9am–4pm
Let's Work Together
Ready to start your project? Get in touch for a free consultation and quote.