Cowiche, Washington

Build your
foundation
on solid ground.

Precision excavation, grading, and site preparation for residential projects across Yakima County. We shape the land so your build rises on certainty.

Request a Quote Our Services
Yakima County
Residential Specialists
Local Owned & Operated
Excavation equipment on a residential construction site in Cowiche, WA
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What We Do

Services built for
the long term.

From initial site assessment to final grading, we deliver the groundwork that every solid structure depends on.

Residential Excavation

Basement digs, footprint excavation, and site clearing for new home construction. We prepare the canvas your house will stand on.

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Grading & Leveling

Precision grading for proper drainage, driveway approaches, and building pads. We contour the land to work for you, not against you.

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Foundation Prep

Compacted, engineered subgrades ready for footings and slabs. We set the stage so your foundation crew can work with confidence.

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Driveway & Access Roads

Graded and compacted driveways, private roads, and equipment access paths built to handle traffic and weather year after year.

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Site Cleanup & Fill

Demolition debris removal, lot clearing, and fill dirt delivery with strategic placement to reshape your property exactly as needed.

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Utility Trenching

Precision trenching for underground utilities, drainage systems, and irrigation—dug to specification and ready for backfill.

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Trepanier Excavating crew working on a residential site in Cowiche, Washington
About Us

Groundwork is where
trust begins.

Trepanier Excavating is a locally owned and operated excavation company based in Cowiche, Washington. We serve residential clients throughout Yakima County with a straightforward approach: show up on time, do the work right, and leave the site clean.

Whether you're breaking ground on a new home, preparing a driveway, or need a tricky slope graded, we bring the right equipment and the right attention to detail. No shortcuts, no surprises—just honest work on solid ground.

Locally owned Cowiche, WA
Residential focus Home projects
Yakima County Full service area
On-time promise Reliable scheduling
How We Work

A process built around your project.

From your first call to the final pass of the grader, we keep things simple, transparent, and on schedule.

01

Consultation

Call or email us to describe your project. We'll discuss the scope, answer your questions, and schedule a site visit at a time that works for you.

02

Site Assessment

We visit your property, evaluate the terrain and access, and provide a clear estimate—no hidden fees, no vague language. Just an honest scope of work.

03

Execution

We show up on schedule, complete the work to specification, and leave your property clean and ready for the next phase of your build.

Get Started

Ready to break ground?
Let's talk about your project.

Whether you need a full site excavation or a simple driveway grade, we're here to help. Reach out today for a free consultation.

(509) 678-4587 Send a Message
Contact

We'd love to
hear from you.

Have a project in mind? Give us a call or send a message and we'll get back to you promptly. We're happy to discuss your site work and provide a no-obligation estimate.

Phone (509) 678-4587
Email djtand2@aol.com
Address 17001 Summitview Rd, Cowiche, WA 98923

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Fill out the form below and we'll follow up within one business day.

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