You Are The Brand

Who We Are.

Member-Owned. Member-Directed.

Built for the Independent

Castle Building Centres Group is a proudly Canadian, member-owned and member-directed buying group built exclusively for independent lumber, building material, and hardware retailers. Every decision we make is guided by one simple belief: when independents thrive, communities thrive.

"Building Relationships to Create & Deliver Solutions"
Castle’s Mission — Unchanged Since 1963

More than six decades later, that mission is delivered through collaboration, smarter buying, meaningful programs, industry-leading technology, and a culture rooted in trust and community.

Member-owned, member-directed — a Castle member store
350+
Independent retailers
across Canada
Our 4 Pillars

Built on four principles.

These aren't words on a wall. They're the foundation of Castle and the reason 350+ independents chose Castle over every other banner.

Integrity

Castle operates with honesty and steadfast integrity in everything we do. You can ask any question and be certain of an honest answer. Always.

Simplicity

No complicated fee structures. No hidden costs. Straightforward membership agreements and the lowest cost of affiliation available to independents.

Transparency

Transparent governance. Audited financials shared with every member annually. What you see is exactly what you get — and what you earn.

Community

The Castle Culture is all about Community. Our collective network cultivates strong relationships invested in the success of our members. We are a community that wins together.

350+ Independent Castle Locations
in Communities Across Canada

Ouellette Bros Building Supplies
Ouellette Bros Building Supplies
British Columbia
Mission Building Supplies
Mission Building Supplies
Alberta
Warman Home Centre
Warman Home Centre
Saskatchewan
Grunthal Lumber
Grunthal Lumber
Manitoba
Alf Curtis Home Improvements
Alf Curtis Home Improvements
Ontario
Homefix
Homefix
Ontario
Leathertown Lumber
Leathertown Lumber
Ontario
Hudson Hardware
Hudson Hardware
Québec
MacCallum Building Supplies
MacCallum Building Supplies
New Brunswick
Spring Valley Building Centre
Spring Valley Building Centre
Prince Edward Island
Our History

A Legacy of Independence.

Castle Building Centres Group is a proudly Canadian, member-owned buying group built exclusively for independent lumber, building material, and hardware retailers. Every decision we make is guided by one simple belief: when independents thrive, communities thrive.

Our member-focussed mission is to build relationships that create & deliver solutions to our 350+ member locations. We deliver on this promise through collaboration, smarter buying, meaningful programs, industry-leading technology, and a culture rooted in trust and community.

Castle…we build communities.

1963
Founded by independents, for independents

A small group of independent lumber dealers band together with a shared goal: access better buying terms without sacrificing their independence or local identity.

1970s
National expansion begins

Castle grows beyond its founding region, attracting independent LBM retailers across Ontario and into the Maritimes — establishing the cooperative model that still defines Castle today.

1980s
Buying power takes hold

As membership deepens, Castle's collective purchasing strength grows — securing the kind of vendor programs and rebates that independents could never access on their own.

1990s
Coast-to-coast presence

Membership reaches every Canadian province. The not-for-profit structure proves its value as member rebates grow alongside the buying group's collective leverage.

2000s
CastleCare programs launched

Castle introduces its suite of member success programs — payment processing, employee benefits, financing partnerships — giving independent retailers the tools of a national chain.

2010s
Technology leadership

Castle invests in industry-leading member technology, from the CastleCore portal to electronic shelf labels and digital marketing tools. The independent goes digital.

Today
350+ members. Still 100% yours.

Over 350 independent retailers across Canada. Every profit, every rebate, every dollar — returned to members. The mission hasn't changed in 60 years: strengthen the independent.

The team at Notre Dame Castle Building Centre
Castle Community

More than a buying group. A community.

Castle members are entrepreneurs, community builders, and industry leaders. From small towns to major markets, Castle locations are deeply rooted in the communities they serve — employing local teams, supporting local initiatives, and building lasting customer trust.

Read Community Stories
Ready to amplify
your independence?
Let's Talk