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Our passion derives from providing you the best in quality, style and service. King & Co. Inc will provide you with the latest product technology, materials and exceptional service for your residential, commercial and industrial needs. Whether you’re selling, renovating or looking to add value to your home, King & Co. Inc. will be there for you until the project is complete.

we offer


See the wide variety of high efficiency windows from the best manufacturers in the industry.


Choose one of our elegant steel entrance doors and you will enhance your home

Why customers choose us

Expert sales, service and installation

We carry a wide range of window products and customization options

Professional and clean installation process

Energy star windows with lifetime warranty

Friendly and understanding customer service

Reliable 24-hour emergency service

get a free quote today!

Call Us Today: 289-221-4721
or Fill out our Form and We'll Get Back to You with a Quote

about us

The De Marco Difference; A legacy that dates back to 1974. A successful name within the industry. We continue to grow with our experience and accomplishments.

For over 30 years our dedication to excellence, high quality products and great customer service, has remained the same. A proudly Canadian owned and operated company. King & Co. Inc. is a leading dealer and installer of superior vinyl windows and steel and fibreglass doors.


"During my search for the ‘right’ window and door company. I took the time to shop around to familiarize myself with product and scope of work needed for the job. I am so lucky that a friend recommended King & Co., because they actually made the process and decision easier for me.

Right from the beginning. The King & Co. team made me feel confident that I was getting the best value, quality and service for what I needed to revamp my home. They were very helpful in walking me through the initial consultation stage right through the installation phase.

Not only was the project finished on time, the installers were amazing! They were so professional and really took pride in their work. Needless to say, the house looks amazing!"

Blayne Lastman
CEO & Chairman, Bad Boy Furniture and Warehouse Limited
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