Reliable Building Supplies in Boise ID & Surrounding Areas
Pre-Order Pickup & Delivery Available
Your Trusted Construction Supply Partner in Southern Idaho
At Conmas Construction Supply, we’re more than just a supplier—we’re your partner in building success. Based in Boise, ID, we proudly serve Southern Idaho’s construction industry with top-quality building materials, tools, and expert service. Whether you’re tackling a small renovation or a large-scale project, our extensive inventory has everything you need to get the job done efficiently and effectively.
Why Choose Conmas Construction Supply?
We know that every project depends on reliable materials and trusted expertise. That’s why Conmas Construction Supply offers:
Extensive Inventory:
From hard-to-find tools to essential building materials, we stock it all.
Proven Expertise:
Backed by over a century of combined industry experience, we provide the guidance you need to succeed.
Timely Service:
With fast delivery and convenient pickup options, we help you stay on schedule and on budget.
Family Values:
Rooted in community and care, we prioritize your success as much as our own.
Construction Products Designed for Your Success
Explore a comprehensive range of high-quality products, including:
Ready to see the difference quality materials can make?
Local Expertise Backed by Generations of Trust


Conmas Construction Supply is grounded in a robust tradition of family-owned excellence. In 2022, we proudly joined forces with two industry frontrunners: Masons Supply Company and MaCon Supply, Inc. Collectively, we offer more than 140 years of combined expertise to the Boise market.
This legacy ensures:
Superior product knowledge.
Strong industry relationships.
A commitment to serving our community.
Convenient Locations to Serve You
Stop by or call one of our locations for expert support:
Boise
2100 E Braniff St., STE 101
Boise, ID 83716
Caldwell
15958 Gunfire Rd
Caldwell, ID 83605
Let’s Build Together
Whether you’re a contractor, builder, or DIY enthusiast, Conmas Construction Supply is here to support your vision. Explore our inventory, consult with our knowledgeable team, and experience unparalleled service every step of the way.