At Knowles Building Centre, we offer a wide variety of trusted brands of building and renovation materials. Our team can assist you with all your building and renovation questions, and our professional services can help get the job done faster and on budget.

For more information on our services, Visit us in-store, contact us or request an estimate today. 

Curbside Pick Up Services

Curbside Pickup

To further serve our customers and contractors during the pandemic, we offer curbside pickup on thousands of items. 

For more information, call us at 705-335-2251 or visit our contact page.

Online Invoicing

Contactless Invoices & Statements

The safety of our customers and team members is our priority. We now offer contactless invoicing and statements through email. For questions about this service, contact us. To get started on your project, request a free quote.

Shop Online

Online Catalog

Search for household items, building supplies, hardware and accessories, tools and much more right from the comfort of your home. Can't find what you're looking for or need to place a large order? Request an estimate here or contact us.


No matter the size of your next project, build, or home renovation, we'll deliver your materials fast to your home, cottage or job site. You can depend on Knowles Building Centre and our team to get your building materials, equipment, scaffolding and supplies on time, on budget. 

Get A Free Estimate

Estimates and House Take-Offs

Estimates & House Take-Offs

Understanding the cost of materials is a great jumping-off point for any build. Using your building or renovation plans, we can provide you with an estimate of your project, including an itemized list, quantity, and cost of all materials, as well as the total cost of the build.

Come in with your detailed plans, contact us, or submit your plan(s) using the estimates form.

Gift Cards

Gifts Cards

Can’t think of what to get the DIYer, decorator, renovator or contractor in your life? A Castle gift card from Knowles Building Centre is a present they can build on. That special someone is sure to find something that makes their job easier, or kick-starts a long-dreamed-of project. You supply the dream. We'll supply the card.

3D Deck Designs

Deck Designs

At Knowles Building Centre, we help our customers visualize their backyard space goals. Customize size, shape and colour of the deck as well as add levels, stairs and railings, pools and hot tubs. We will also provide a complete and accurate estimate of all the materials required to build it.

To make your outdoor space the favourite room of your house, drop-in, contact us or request a quote today.

Kitchen Take-Offs

Kitchen Design & Take-Offs

A kitchen is the heart of a home, where family and friends gather and memories are made. Knowles Building Centre can help focus your vision and let you visualize your final design, and make final decisions on layout, features and finishes. This makes it easy to share your ideas with your builder or contractor.

Come in with your detailed plans, contact us, or submit your plan(s) using the estimates form.

Key Cutting

Key Cutting

For your convenience, we will cut your automotive, house or padlock key while you are in our store. Got a question about our key cutting service? Contact us. 

Paint Mixing

Colour Matching & Paint Mixing

No matter your project, the paint experts at Knowles Building Centre can help you make the right colour choices and product choices for your needs. If you have a reference colour from a paint chip, fabric sample or wherever you're drawing inspiration from, our paint experts will match the colour and create a shade specific to your project. Drop-in, contact us or request a quote today.