Need Service or Have an Emergency? Call: 800 727 0750Rebates & Promotions

Commercial Overview

Hy-Mark is a leading multi-trade contractor in Ontario for commercial buildings. We offer design-build, plan-and-spec, and construction management for new construction and retrofit services for construction projects, commercial hydronic systems and much more.

Known throughout the industry for our professionalism and dependability, Hy-Mark has been offering industry leading HVAC systems and plumbing services to the Ontario business community for over a decade. We can handle builds and retrofits of any size and scope for public and private ventures.  Including Hy-Mark in your building process will ensure optimal and efficient results. We work with general contractors and commercial real estate developers all over Ontario to ensure they deliver on your comfort requirements, on-time and on-budget.

Get in touch by contacting


image of commercial worker referencing blueprint

24 Hour Service

Hy-Mark offers 24/7 Emergency Service for no-heat, no air conditioning and plumbing needs!*
Toll-Free: 800 727 0750

Head Office

5068 Whitelaw Road, Unit #4
RR6, Guelph ON N1H 6J3
Phone: 519 822 6656
Toll-Free: 800 727 0750

Owen Sound Office

105 Shane Street
Units 2 & 3
Springmount Business Park
Owen Sound ON N4K 5N7
Phone: 519 376 1678
Toll-Free: 800 727 0750

London Office

179 Exeter Road, Unit C
London ON N6L 1A4
Toll-Free: 800 727 0750