Built on Legacy.
Driven by Precision.
Windsor Underground LLC is a Phoenix-based dry utility contractor built on integrity, safety, and precision. From trenching and HDD to potholing and energization, we handle every aspect of underground utility infrastructure with the professionalism only decades of experience can bring.
Our culture revolves around strict safety protocols, protecting teams, clients, and infrastructure.
Safety Above All
We prioritize transparency, communication, and partnership from design to completion in all of our projects.
Client-Centered Service
Every project we touch reflects our reputation—done right the first time, every time.
Accountability & Quality
From Legacy To Leadership
Windsor Underground emerged as a continuation of the Windsor Excavating legacy—founded in 1986 by Joe Windsor and carried forward by Ryan and Nicole Windsor. With over 39 years of combined industry experience, the company is driven by a clear mission: to deliver exceptional dry utility infrastructure services grounded in integrity, safety, and forward-thinking innovation.
What began with secondary electric installs for local homebuilders has grown into a full-service dry utility operation serving general contractors, municipalities, and developers. Our clients trust us to manage every phase—from design collaboration and permitting to precise trenching, boring, and energization.
“We didn’t just inherit a name—we inherited a responsibility to raise the standard in dry utility construction.”
Nicole Windsor, CEO
What areas do you serve?
- Phoenix Metro: Scottsdale, Tempe, Mesa, Chandler
- Rural: Wickenburg, Casa Grande, Coolidge, Eloy
- Expanding: Carefree, Anthem, and more
What services do you offer?
- Excavation & Trenching
- Hydro Excavation / Potholing
- Horizontal Directional Drilling (HDD)
Who are your typical clients?
- National homebuilders
- City and county governments
- Commercial developers
How does your process work?
- Design & Utility Coordination
- Permitting & Mobilization
- Execution & Energization
Why Choose Windsor Underground?
Windsor Excavating provides reliable dry utility services backed by a steadfast commitment to integrity and operational excellence. Our team delivers expert trenching, conduit installation, and infrastructure support with a focus on safety, efficiency, and long-term performance. With every project, we uphold the highest standards to ensure dependable results that exceed client expectations and meet evolving utility demands.
Turnkey Project Execution
We handle every step—from design review and permits to utility installation and energization—simplifying your workload.
Safety & Compliance
Licensed, insured, and fully aligned with state and utility regulations to ensure risk-free results.
Dedicated to Client Success
We communicate early and often, ensuring projects stay on track and expectations are exceeded.
Deep Regional Knowledge
We know the Phoenix permitting system, utility providers, and terrain—so your timelines stay intact.
Let us handle your underground work while you build above.
Ready to Build with Confidence?
Contact Windsor Excavating today and get your dry utility project started right.
Serving Arizona’s Growing Infrastructure Needs
Windsor Underground proudly delivers turnkey utility trenching, boring, and excavation solutions across Central and Northern Arizona. From booming urban developments to rural infrastructure builds, we’re trusted across the region for precision, safety, and results.
Maricopa County
Glendale
Scottsdale
Peoria
Tempe
Gilbert
Surprise
Fountain Hills
Chandler
Mesa
Pinal County
Apache Junction
Casa Grande
Eloy
Coolidge
Maricopa
Queen Creek
San Tan Valley
