Who We Are
Columbia Groundwork is a locally owned and operated excavation and construction company proudly serving Southwest Washington.
We specialize in commercial, heavy civil, and residential excavation, offering scalable solutions tailored to each client’s needs — whether your project demands a full-size crew or a more focused team.
Columbia Structure is the building side of our company and operates as a DBA under Columbia Groundwork. It is also fully licensed in Washington State.
Rooted in experience and craftsmanship, we’re here to be more than just your contractor — we’re your project partner.
Our Services
Excavation
Land Reclamation
Erosion Control
Landscape Preparation
Post Frame Structures Construction
Post Frame Structures Kit Sales
From rough grade to finished structures, our team brings the experience, equipment, and commitment to deliver results — on time and on budget.
Design, Engineering, and Permitting
We make the construction process easier by offering a full in-house department dedicated to:
Project design
Engineering coordination
Permit acquisition
This means you don’t have to juggle multiple companies to get your project off the ground. We streamline the entire pre-construction phase, keeping your project efficient and stress-free.
Post Frame Structures Kits
Looking for a faster way to build? We offer professionally designed post frame structures kits engineered for efficient construction and long-term durability.
Whether you’re a contractor or a DIY builder, our kits are tailored to:
Minimize build time
Maximize strength
Deliver lasting value
Our Approach
At Columbia Groundwork, we believe in selectivity, not volume.
We focus on projects where our experience and attention to detail make a real difference. Our ability to visualize terrain, grade challenges, and construction needs before ground is even broken allows us to streamline timelines, control budgets, and deliver better outcomes.
Whether acting as a general contractor or subcontractor, our commitment remains the same:
safety, quality, knowledge, and customer service — every project, every time.
Where We’re From
Formerly based in Longview, Washington, Columbia Groundwork has relocated to rural Castle Rock.
We’re proud to get back to our small community roots while continuing to provide Grade A service throughout the greater Southwest Washington region.
Where to start
For a free estimate of our services.
