Tri-State Materials

Business Details

Your Trusted Source for Natural Stone and Aggregate Materials

Tri-State Materials has been serving the Inland Empire region with premium natural stone and aggregate materials since our establishment. Located near Diamond Valley Lake in Winchester, California, we specialize in providing high-quality construction and landscaping materials to contractors, landscapers, and DIY enthusiasts. Our extensive inventory includes decomposed granites, cobbles, boulders, flagstones, and exotic specimens, all carefully sourced and maintained to meet industry standards. With two convenient locations in Winchester and Coachella, we offer flexible delivery services using specialized equipment including flatbeds with forklifts, low beds for oversized materials, and end dump trucks for bulk deliveries. Our experienced team understands the unique requirements of construction and landscaping projects, providing expert guidance to help customers select the right materials for their specific applications.

We maintain strict quality control throughout our supply chain to ensure consistent product quality and availability. Our commitment to customer satisfaction extends to our delivery operations, with dedicated personnel available to coordinate specialized handling requirements for oversized materials. Through years of service in the regional construction industry, we've built a reputation for reliable supply chain management and on-time delivery performance. Our website provides comprehensive product information and specifications, allowing customers to make informed purchasing decisions. We continuously invest in expanding our product offerings to meet evolving market demands while maintaining competitive pricing structures.

Services

Boulders Cobble River Rock Crushed Aggregate DG Exotics Soils Mulch Flagstone Travertine

Highlights and features

We offer a wide selection of natural stone products for all project types
Our specialized delivery fleet handles materials of all sizes and weights
We maintain consistent inventory levels for reliable material availability
Our team provides expert product recommendations based on project needs
We operate two strategically located distribution centers in Southern California

Website

Update Listing

Services

Boulders

Our selection of natural boulders provides durable solutions for landscaping and construction projects. These massive stones serve multiple purposes including erosion control, retaining walls, and decorative features. Available in various sizes and formations, our boulders are carefully sourced to maintain structural integrity while offering aesthetic appeal for both residential and commercial applications.

Crushed Aggregate

We supply crushed aggregate materials for infrastructure and building projects. This versatile product serves as base material for roads, foundations, and drainage systems. Our aggregates meet industry specifications for compaction and durability, ensuring reliable performance in both residential and commercial construction applications where structural stability is critical.

Flagstone

Our natural flagstone collection offers premium paving solutions for outdoor living spaces. These flat, durable stones create elegant walkways, patios, and pool decks with unique natural patterns. Available in various thicknesses and finishes, our flagstone products combine aesthetic appeal with functional durability for both residential landscaping and commercial hardscaping projects.

Delivery Services

We provide specialized delivery solutions for bulk material transportation. Our fleet includes end dump trucks for large boulders, flatbeds with forklifts for palletized supplies, and low bed trucks for oversized loads. With multiple delivery points across Southern California, we ensure timely and efficient transport of construction and landscaping materials to project sites.

DG Products

Our decomposed granite (DG) products offer versatile solutions for landscaping and trail construction. This naturally-occurring material provides excellent drainage while maintaining compaction for stable surfaces. Available in various gradations, DG works well for pathways, garden beds, and equestrian trails, combining functional performance with natural aesthetic appeal for both residential and commercial applications.

Questions

What types of natural stone products do you offer?

We carry decomposed granites, cobbles, boulders, flagstones, travertine, and exotic specimens for construction and landscaping applications.

Do you offer delivery services for bulk materials?

Yes, we provide specialized delivery using various truck configurations including end dumps, low beds, and flatbeds with forklifts.

What are your business hours?

Our Winchester location operates Monday-Friday 7:00-15:30 and Saturday 7:00-14:00. Coachella hours are Monday-Friday 6:30-15:00.

Where are your locations?

We have two locations: 31885 Winchester Rd, Winchester, CA 92596 and 85230 Peter Rabbit Ln, Coachella, CA 92236.

Reviews (4)

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Chris G.

May 20, 2022 Report

I hired a landscaper to replace my front lawn with a desert landscape. He suggested that I visit Tri-State Materials in order to select the materials to be used in my project. That turned out to be the best advice I could get! At Tri-State Materials, located at 31885 Winchester Road, I was able to view the various colors and sizes of rock, slate step stones, and more. All offered at a very low cost.

The people who work there are most helpful, especially Kendra, who was behind the counter. She knows her stuff and was very patient with me throughout my transactions. I highly recommend you visit Tri-State and if you need to give them a call, the number is 951-926-5522. I even received a discount as a Veteran.

Saul Villarreal

Apr 10, 2022 Report

Best place to go and get landscaping materials like gravel dg gravel clean soil sand etc. also they sell pavers flagstones natural stone cobble river rock etc. best prices in the valley truly recommend this place im a contractor but they also sell to the public as well.

Thomas D.

Mar 14, 2022 Report

Just left the office. They have a great selection of different ground covers and a sample board much better than the competitors. Reasonable pricing with complete transparency. The yard is laid out professionally and the staff is helpful and knowledgeable.

Paul P.

Nov 17, 2021 Report

I have used Tri-State for years, they have a wide selection of materials and are always helpful in delivering the materials in a timely fashion. Their prices are extremely competitive, I would say less than half the price of place like Lowe's or Home Depot.