Call Now
Website
Call
Business Details
50+ Years
experience
Emergency
services
Your Trusted Partner for Construction Solutions in Mississauga
De Man Construction has been a trusted name in the construction industry for over 60 years, serving clients across Southern Ontario. Our expertise spans industrial manufacturing facilities, food production plants, medical and veterinary clinics, retail centers, corporate offices, and transportation facilities. With a commitment to precision and integrity, we deliver projects ranging from $500,000 to $15 million, ensuring every client receives dedicated attention to detail. Our service division handles smaller projects between $500 and $500,000, maintaining the same high standards. Headquartered in Mississauga, our skilled team consistently meets tight deadlines while prioritizing customer satisfaction.

We pride ourselves on a long history of successful projects, including partnerships with major brands like Shoppers Drug Mart and CN/CPR Railway. Our diverse portfolio demonstrates our ability to tackle projects of any scale, from recreational centers to automotive dealerships. Backed by a 1955 founding legacy, we remain a leader in design-build and general contracting services. Our clients benefit from transparent communication, proven methodologies, and a team approach that combines experience with innovation. Whether it's new construction or maintenance work, De Man Construction remains committed to building lasting value for every client.
Services
Industrial Manufacturing Facilities Food Production Plants Medical Clinics Construction Retail Center Development Automotive Dealership Projects Pre-Construction Planning Structural Steel Work Loading Dock Construction Pool & Recreation Centers Commercial Millwork
Details
  • Year established: 1955
Highlights and features
  • We have completed 8,000+ projects across 52 Ontario cities since 1955
  • Our team handles projects ranging from $500 to $15 million
  • We maintain 24/7 emergency response availability for urgent needs
  • Our service division specializes in maintenance, electrical, and plumbing
  • We offer comprehensive pre-construction planning services
What people say
Unwavering commitment Highly skilled staff Tight construction deadlines Dedicated level of care Expert construction team
Services
Industrial Manufacturing Facilities
De Man Construction specializes in building industrial manufacturing facilities tailored to client specifications. Our expertise includes structural steel work, loading docks, and specialized flooring solutions. We ensure compliance with industry standards while maintaining strict timelines and budgets.
Food Production Plants
We construct hygienic, code-compliant food processing plants with specialized features like cooler-freezer floors. Our experience ensures facilities meet strict health and safety regulations while optimizing workflow efficiency for food production operations.
Medical Clinics Construction
DeMan builds healthcare and veterinary clinics with attention to specialized requirements. Our projects incorporate infection control measures, accessible design, and medical-grade infrastructure to create functional, patient-friendly environments that meet regulatory standards.
Retail Center Development
We deliver comprehensive retail construction solutions from small storefronts to large shopping centers. Our services include site preparation, structural work, and interior finishes tailored to modern retail requirements and customer accessibility needs.
Pre-Construction Planning
Our pre-construction services include feasibility studies, budgeting, and project scheduling. We work closely with clients to develop detailed plans that minimize risks and ensure smooth execution throughout the construction process.
People
Peter DeMan
President
Peter DeMan leads the company with over 40 years of industry experience. He ensures operational excellence and client satisfaction across all projects while maintaining the company's founding values of integrity and quality craftsmanship.
Robert DeMelo
Plant Manager
Robert DeMelo manages plant operations with expertise in industrial project execution. His hands-on approach and technical knowledge ensure timely delivery of complex projects while maintaining strict quality control standards.
Questions
What construction services does DeMan offer?
We provide full-service construction including industrial facilities, food processing plants, healthcare clinics, retail centers, and automotive dealerships. Our services also cover pre-construction planning and maintenance work.
How long has DeMan Construction been operating?
DeMan Construction has served Southern Ontario since 1955, with over 60 years of experience in the construction industry.
What project sizes does DeMan handle?
We manage projects ranging from $500,000 to $15 million, with a dedicated service division handling smaller projects between $500 and $500,000.
Do you offer emergency construction services?
Yes, we provide 24/7 emergency response for urgent construction needs with direct contact to our President Peter DeMan at 416-678-0250.
Where does DeMan operate?
We primarily serve Southern Ontario and the Greater Toronto Area, with completed projects across 52 Ontario cities.
Reviews (3)
Vinay Saini
Oct 02, 2020 Report
Had an awesome experience with this company. They helped us build our dream daycare in Mississauga. We told them what we wanted, they put them in drawing and then built. The owner Peter is an awesome person to deal with. Would recommend this company to everyone....
Camp Canine
Nov 12, 2019 Report
Peter Deman and his team are experienced, honest, caring, and highly competent commercial contractors. The project they completed for me was the first time any contractor met my exacting standards - on time and in budget - that never happened before in 15 projects i have done with other companies. Importantly Peter provided invaluable council on design. I will now only use Deman construction regardless of how long I need to wait for them to be available.
David De Man
Sep 15, 2011 Report
We are your construction destination, for all aspects of construction needs from excavation to trim they do it all, no muss no fuss!