Building Canada's
Future — One
Project at a Time
Trusted by Canada's top commercial developers and general contractors. Bulk pricing, nationwide shipping, and job site delivery on 15,000+ products.
Everything Your Project Demands
From foundation to finish — 15,000+ SKUs across every major building material category, stocked and ready to ship Canada-wide.
Lumber & Framing
Dimensional lumber, engineered wood products, glulam beams, LVL, I-joists, and structural panels for every scale of project.
Explore Category
Concrete & Masonry
Ready-mix concrete products, masonry blocks, brick, mortar, rebar, form systems, and concrete accessories for foundations and structural work.
Explore Category
Roofing & Waterproofing
Asphalt shingles, TPO, EPDM, modified bitumen, ICF, membranes, underlayment, ventilation, and complete waterproofing systems.
Explore Category
Insulation & Vapour Barrier
Batt, blown-in, rigid board, spray foam, and continuous insulation solutions. Full vapour barrier systems for Canada's climate demands.
Explore Category
Drywall & Interior
Standard and specialty drywall, metal stud framing, joint compound, finishing accessories, and interior partition systems for commercial builds.
Explore Category
Steel & Structural
Structural steel sections, hollow structural sections, steel decking, anchor bolts, joist systems, and engineered connection hardware.
Explore Category
Doors & Windows
Commercial-grade exterior and interior doors, curtain wall systems, skylights, storefront glazing, fire-rated assemblies, and frames.
Explore Category
Tools & Fasteners
Professional-grade fasteners, anchors, power tools, hand tools, safety equipment, and job site supplies to keep your crew productive.
Explore CategoryBuilt for Builders,
Not Homeowners
We're not a big-box store. We're a commercial and development supply partner built from the ground up for contractors, developers, and project managers running serious operations. Our scale, logistics, and pricing are calibrated to the demands of multi-million-dollar builds.
"We've supplied materials to over 500 commercial and residential developments across Canada. Our clients build the skylines — we supply the materials."
Bulk Pricing on Volume Orders
The more you build, the more you save. Our tiered pricing structure is built for commercial volumes — not retail margins. We work directly with manufacturers so savings go to your bottom line.
Up to 30% below retailDirect-to-Job-Site Delivery
Crane trucks, flat-beds, and experienced drivers who know how commercial sites operate. We coordinate deliveries around your schedule, not ours.
500+ deliveries / monthDedicated Account Manager
Every commercial client gets a single point of contact who knows your specs, your project timeline, and your standards. No call centers. No ticket queues.
24-hr response guaranteedCanada-Wide Shipping & Logistics
From Vancouver to Halifax, our logistics network means you can source everything from one supplier regardless of where your project is breaking ground.
All 10 provincesOne Supplier for the Entire Project Lifecycle
From the first structural pour to the final finish coat — GP Building Supplies has the product breadth, logistics capability, and commercial expertise to support every phase of a major build.
- Foundation & Structural
- Framing & Sheathing
- Envelope & Roofing
- Interior Finishing
- Mechanical Rough-In Support
Trusted by Canada's Top Builders
"GP has been our primary supplier on three major condo developments in the GTA. Their bulk pricing is genuinely competitive and the job site delivery has never missed a scheduled window. That kind of reliability is worth more than the per-unit price."
"When we were mid-pour on a 12-storey commercial tower and had a material discrepancy, GP's account team sourced a same-day solution. That's not service you get from a big-box supplier — that's a real partner."
"We've been running high-volume residential framing contracts across Western Canada for eight years. GP Building Supplies is the only supplier who can match our pace on lumber and engineered wood at the volumes we need. The Canada-wide shipping is a genuine differentiator."
"The takeoff and estimation service saved us hours on our last three bids. Sending plans and getting back a complete, accurate material list — with alternatives — changed how we approach tender season entirely."
Ready to supply your next project?
Get a custom quote in 24 hours. Our team works directly with your plans to build a complete material package — at volume pricing.