Cornerstone Construction

Who We Are

Cornerstone Construction of Seattle Inc. has been a leading provider of earthwork and underground utility construction services in the Greater Puget Sound area since 1986. Driven by our unwavering commitment to excellence and client satisfaction, we've built lasting relationships with local general contractors, builders, and homeowners.

Our Expertise

We offer a comprehensive range of services covering all aspects of excavation, utility installation, and demolition. Our skilled team tackles projects of all sizes, from residential foundations to complex commercial infrastructure.

Our services include

• Demolition and Excavation: Precise and efficient excavation services for foundations, utility installations, and more.
• Underground Utility Installation: Main line extensions, taps, manholes, catch basins, duct banks, and more.
• Utility Repair and Replacement: Expertise in handling all types of underground utilities, including sewers, storm drains, water lines, and electric cables.

Our Values

Client satisfaction is at the heart of everything we do. We are committed to:

• Integrity: Always adhering to the highest ethical standards and maintaining open communication.
• Excellence: Delivering meticulous workmanship and exceeding expectations.
• Efficiency: Completing projects on time and within budget.
• Collaboration: Working seamlessly with clients and other stakeholders to achieve shared goals.

Why Choose Cornerstone Construction?

With over three decades of experience, Cornerstone Construction has the knowledge, skills, and resources to handle all your project needs. We offer:

• Proven Expertise: Extensive experience working on various project types and industries.
• Licensed and Insured: Confidence that comes with working with a licensed and fully insured company.
• Custom Solutions: Tailored services designed to meet the specific needs of each project.
• Exceptional Communication: Regular updates and clear communication throughout the process.

Contact us today to discuss your project and discover how Cornerstone Construction can help you achieve your vision!