About Knowles Building Centre - Since 1950

Knowles Building Centre is a local, family run business. It was established by George Knowles in 1950. For years, the business was run by George with the help of his two sons, Richard and Michael. In 2000, Richard, his wife Johanne, his son Scott and Scott’s wife Simone took over the business. We continue as independent retailers and we manage and operate the store today.

Our store, lumberyard and warehouse are located at 1 Queen Street in Kapuskasing. We sell a full line of lumber, plywoods, builder’s supplies and builder’s hardware. We serve you with an enthusiastic and bilingual staff of 15 full-time employees.

At Knowles Building Centre we maintain our position as a competitive supplier of building products in the area through our association with Castle Building Centres. We have been a shareholder and member of the Castle Building Centres buying group since 1974. This association allows us to offer our customers competitive prices on the products we carry.

We also belong to the Kapuskasing and District Chamber of Commerce, the Canadian Federation of Independent Business, the Lumber and Building Materials Association of Ontario, and the Canadian Retail Hardware Association to name a few.

Our business consists of a 10,000 square foot store with approximately 8,400 items that make up our inventory. We maintain a good selection for do-it-yourselfer’s, contractors, as well as commercial operators. Our business includes a covered warehouse and a large parking area.

Our philosophy is creating partnerships with our customers. We strive to supply the right material in the right quantities at the right time. Our staff has first hand knowledge of building materials, construction techniques, and building codes.

At Knowles we have a sincere passion for what we do and are committed to our customers and to the community we live in! We invite you to come in and experience our store. Or, request a quote right now.


We're a member of Castle, the buying group for independents

Since 1963, builders, contractors and consumers have been relying on Castle as their building supply partner.  Whether you're looking for lumber, building materials, hardware or advice, hundreds of Castle dealers across Canada are trusted to deliver quality products, expert advice and value. Castle dealers are independent. They run their own stores and businesses.  They know their communities, their customers, and their needs.  That's why Castle members are growing and succeeding across Canada - they live in the communities they serve. Castle is your trusted building supply partner.

Your Trusted Building & Hardware Supply Partner - Since 1950