Who We Are

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Building Tomorrow, Today

Glenwood Mason Supply Company is the largest manufacturer of concrete block
in New York City.
Widely regarded as a leader in sustainable innovation 
in block manufacturing, Glenwood Mason is also a top 
supplier of brick, Architectural CMUs, cast stone, mortar, relieving angle systems, and other building materials that help architects, engineers, contractors, and homeowners complete development projects across the Tri-State area.
35000
Blocks Each Day
35000
lbs of CO2 saved
Contact Our Team
Outer wall of apartment building with plants hanging down

Our Mission

Glenwood Mason Supply Company, Inc., our mission is to provide the highest-quality masonry products, expertise, and service to the construction and architectural communities we serve.

As a New York City-based manufacturer and supplier, we are committed to combining quality, innovation, sustainability, and dependable service to help our customers build stronger, safer, and more resilient communities.

We strive to be more than a supplier—we are a trusted partner to architects, engineers, contractors, masons, and developers, providing the knowledge, products, and support needed to bring great projects from concept to completion.

Through responsible manufacturing, sustainable material innovation, and a continued investment in our people and industry, Glenwood is dedicated to building a better future—one project, one partnership, and one masonry unit at a time.

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Start Your Project with Success

We’re proud of our partnerships across the Tri-State area — supporting architects, engineers, contractors, and homeowners with an array of development and redevelopment projects.
Woman looking at architectural model

History

Drive sustainability forward through key industry partnerships and adherence to the latest standards and product specifications.
Our History
Two workers reviewing building plans

Companies

Access the highest level of service with a diverse range of inventory and vendors, backed by robust customer support and a strong track record.
Our Companies
Stone block patio

People

Elevate your next home improvement project with unmatched technical support and cost-effective solutions that will set you up for success.
Meet the Team

Who We Work With