Business Details
50+ Years
experience
Your Seattle Underground Construction Experts Since 1938
Deeny Construction was founded in 1938 by John Deeny with a commitment to integrity, safety, and quality that remains unchanged across three generations of family leadership. Our team of skilled professionals has built a reputation for excellence in underground utility construction and site-work, serving clients across the Greater Seattle Area. We prioritize safety as our top value, reflected in our industry-leading safety awards and membership in the Associated General Contractors of Washington Safety Team since its inception in 1990. Our long-standing relationships with major clients like Boeing, the University of Washington, and Swedish Hospital demonstrate our ability to deliver complex projects with precision.From sewer installations to storm detention systems, we combine decades of experience with cutting-edge techniques to meet evolving industry demands. Our family-owned structure ensures personalized service while maintaining the highest standards of accountability. We continuously invest in training and safety programs to protect our most valuable assetour employees. Through economic cycles and technological changes, our core principles have remained constant while our capabilities have expanded. Today, as a fourth-generation family member joins our leadership, we continue advancing our vision: 'We Dig Safer and Better.' This philosophy guides every decision we make and every project we undertake.
Services
Underground Utilities
Site-Work
Sewer Installations
Excavation
Storm Detention Systems
Details
- Year established: 1938
Highlights and features
- We have over 85 years of experience in underground utility construction
- Our team maintains a top-down safety culture recognized with national awards
- We work with major clients including Boeing and Swedish Hospital
- We are a founding member of the AGC Safety Team since 1990
- Our family-owned business ensures personalized service and accountability
Services
Underground Utilities
We specialize in complex underground utility systems including electrical infrastructure and sewer networks. Our work involves precise excavation, trench shoring, and vault installation inspected by Seattle City Light. With decades of experience, we deliver safe, code-compliant solutions for both public and private sector clients across Seattle.
Storm Detention Systems
Our team installs concrete storm detention pipes for commercial developments like the Yesler Terrace project. We handle large-scale excavation and concrete placement to manage stormwater effectively. These systems help prevent flooding while meeting environmental regulations for modern construction projects in urban settings.
Excavation
We provide comprehensive excavation services using modern equipment for both exterior and interior projects. Our capabilities include removing hundreds of cubic yards of material for tenant improvements and structural rebuilds. We maintain strict safety protocols during all excavation operations to protect workers and surrounding infrastructure.
Sewer Installations
With decades of experience in Seattle's challenging conditions, we install and maintain sewer systems for residential and commercial developments. Our crews use advanced trenching techniques while maintaining safety standards that have earned us industry recognition. We work closely with municipal authorities to ensure compliance with all regulations.
Site-Work
We handle complete site development including grading, utility coordination, and infrastructure preparation. Our projects range from commercial developments to public works, always maintaining focus on safety and quality. We work with general contractors to ensure sites are properly prepared for building construction.
People
John Deeny
Founder
Founded Deeny Construction in 1938 with basic tools and entrepreneurial spirit. Established core values of integrity, safety, and quality that continue guiding the company through three generations of family leadership.
Terry Deeny
Former President
Joined the firm in the 1960s, expanded operations while maintaining family values. Served as AGC national president in 1999, implementing modern management practices that strengthened the company's industry position.
Jon Deeny
Former CEO
Assumed leadership in 2000 with marketing expertise, building on the company's reputation. Focused on public relations and business development while maintaining commitment to safety and quality standards.
Patrick Deeny
Current Leader
Fourth-generation family member who joined in 2014. Rapidly advancing through leadership ranks while continuing the company's tradition of innovation and safety-focused operations since joining the family business.
Questions
What types of construction projects do you specialize in?
We specialize in underground utility construction and site-work including sewer installations, storm detention systems, and excavation projects across Seattle and surrounding areas.
How long has Deeny Construction been in business?
We've been serving Seattle since 1938, making us one of the region's most experienced underground utility contractors with three generations of family leadership.
What safety measures do you implement on job sites?
Safety is our top priority with a company-wide culture from leadership to field crews. We maintain industry-leading safety programs and have received multiple national safety awards.
Are you a family-owned business?
Yes, we're a third-generation family-owned company with fourth-generation involvement, maintaining personal accountability while delivering large-scale construction solutions.
What areas do you serve?
We primarily serve the Greater Seattle Area, handling projects from downtown Seattle to surrounding communities throughout King County and Western Washington.
