Contractors in Washington

Columbia Rail operates short line railroads covering 166 miles in Eastern Washington and Eastern Oregon, with a focus on safety, customer service, and value. Founded by Paul Didelius.

Columbia Water Technology, LLC (CWT) provides innovative chemistry, customized equipment systems and individualized services to meet customers' needs in industries including Biofuel, Pulp and Paper, Lumber, Chemical Processing and Power Generation.

Colvico, Inc. specializes in utility and off-site work, including airport runway lighting and signage, duct banks, trenching, parking lighting, traffic signals, industrial projects ranging from water treatment systems to fueling facilities. They are a substantial provider of traffic signals and street lighting.

Compton Lumber & Hardware is a construction company based out of 1919 4th Ave S, Seattle, Wa

Confluence Environmental Company offers services in environmental science, project management, and regulatory strategy and compliance for various public and private projects. Their mission focuses on improving the community through effective solutions to complex client needs.

Constantine Builders provides quality-oriented general contracting and construction management services on all types of projects. They focus on building relationships based on trust, dependability, quality craftsmanship and integrity.

Construct ONE specializes in light commercial, multi-family, and hospitality projects. They offer development management, value engineering, and pre-construction consulting services.

Constructiv LLC specializes in designing and building high-performance data centers, focusing on resiliency, energy efficiency, and speed. They support data center owners and operators to meet their capacity needs and scale their infrastructure without compromising continuity or uptime.

Core Design, Inc. is a team of professionals specializing in Planning, Landscape Architecture and Urban Design, Civil Engineering, Surveying and Construction Management services.

Cornerstone General Contractors, Inc. provides preconstruction and construction services for commercial and institutional projects.

Corrections Technology Group is a specialty contractor serving detention, corrections and homeland security markets in the United States. They offer partial and turnkey integration, design build, engineering, installation & services.

Design and Multi-Engineering Consultancy Company providing complete solutions for the planning and execution of commercial facility services in the greater Seattle area. Specializes in installation, construction, and painting services.

Crucible Engineering LLC provides project management, design solutions, and emergency project correction to the marine industry.

Crux Subsurface is a geotechnical exploration and construction firm. They provide contract drilling and related services to the industry. They specialize in logistically challenging and environmentally sensitive projects where access and subsurface conditions present difficulties.

Family owned and operated since 1995, Cyclone Services is the 5th largest specialized carrier in the USA, focusing on Transportation & Logistics.

DB General Contractors, Inc. is a Washington-based general contractor specializing in commercial, retail, financial, and tenant improvement projects. They focus on construction, project management, and maintenance services.

DBO Solutions designs, builds and operates street waste, hydrovac waste and vactor decant facilities. They deliver industry-leading modular systems for dewatering of sludge, street waste, vactor waste, and hydrovac waste. DBO Solutions builds public/private partnerships specific to municipal street waste operations.

Diversified Construction Services, Inc. provides general construction services including pre-construction, value engineering, and design-build. They work on projects such as hotels, university buildings, and animal hospitals.

DHC Contracting specializes in commercial construction projects in the Pacific Northwest, offering white-glove service from preconstruction to handover.

Dietrich Trucking LLC has been providing experienced trucking services since 1999, specializing in hauling various materials including municipal solid waste, construction materials, and contaminated soil.

DKB, Inc. is a privately held business headquartered in the Pacific Northwest, offering mechanical insulation and construction services to industrial and commercial industries throughout the United States, with an emphasis on the western states. The company is dedicated to providing high value in insulation products and services aimed at improving energy efficiency and cost savings.

DOWL is a professional services firm skilled in planning, surveying, engineering (transportation, civil, structural, water resources, and geotechnical), environmental, and other support services.