Business Details
23 Years
experience
Emergency
services
Trusted Commercial Construction Solutions in Brookfield, WI
Founded in 2003, CornerStone One has established itself as a leader in commercial construction services across Eastern Wisconsin. Our company was built on the principle of creating a workplace where innovation, integrity, and community drive every project. We specialize in delivering comprehensive solutions for commercial plumbing, HVAC, earthwork, site utilities, and facility service solutions, leveraging advanced technologies like Building Information Modeling (BIM) and prefabrication to ensure precision and efficiency. Our commitment to reducing risk through meticulous planning and real-time project monitoring has earned us a reputation for meeting deadlines and budgets without compromising quality.With a dedicated team of experts, we focus on building lasting relationships with clients by exceeding expectations in every project, from initial design to final execution. Our philosophy of continuous improvement and proactive problem-solving ensures that we deliver systems designed for long-term performance. By maintaining a culture of accountability and excellence, we have become a trusted partner for clients seeking reliable, innovative construction solutions. Our values of integrity, quality, and community guide every decision, ensuring that we not only meet industry standards but set new benchmarks for excellence in the construction sector.
Services
Commercial Plumbing
HVAC Systems
Earthwork
Site Utilities
Facility Services
Prefabrication
Wastewater Treatment
Emergency Repairs
Preventative Maintenance
Predictive Maintenance
Details
- Year established: 2003
Highlights and features
- We guarantee on-time project delivery using prefabrication and BIM technology.
- Our team offers 24/7 emergency HVAC and plumbing services with rapid response times.
- We reduce project risk through advanced diagnostics and real-time site monitoring.
- Our in-house engineering team designs systems for long-term energy efficiency.
- We provide end-to-end solutions from design to maintenance under one roof.
Services
Commercial Plumbing
Our commercial plumbing division delivers customized solutions for hotels, hospitals, and schools. Using advanced technologies like robotic layout systems, we ensure precise installations and long-term reliability. Clients benefit from reduced downtime and systems designed for optimal performance.
HVAC Systems
We design, install, and maintain energy-efficient HVAC systems for commercial and industrial buildings. Our integrated approach ensures seamless operation with plumbing systems, while predictive maintenance extends equipment lifespan and minimizes disruptions for facility owners.
Earthwork
Modern equipment and expert crews handle excavation, grading, and foundation work. We prioritize site-specific planning to ensure structural integrity and compliance with project requirements, creating stable bases for construction projects across industries.
Facility Services
24/7 support for plumbing, HVAC, and environmental chamber systems. Our technicians respond rapidly to minimize downtime, offering both routine maintenance and urgent repairs for commercial facilities including hospitals, manufacturing plants, and senior living centers.
Prefabrication
Over 70% of plumbing components are prefabricated in our 25,000 sq ft facility using precision manufacturing. This approach compresses schedules by 30-40%, reduces field labor costs, and ensures quality through controlled environment assembly and testing.
People
Steve Adkins
Principal
Steve Adkins co-founded CornerStone One in 2003 and leads strategic initiatives. With 20+ years in construction management, he emphasizes innovation and accountability, ensuring projects meet quality standards while fostering a culture of continuous improvement.
John Muraski
President
John Muraski oversees daily operations at CornerStone One. His leadership focuses on client relationships and operational efficiency, leveraging 25 years of construction industry experience to maintain the company's reputation for reliable, high-quality project delivery.
Dan Parman
Co-Founder
Dan Parman co-founded CornerStone One and drives technical innovation. With expertise in mechanical systems and prefabrication, he ensures the company maintains cutting-edge capabilities in commercial plumbing and HVAC solutions for complex projects.
Jessica Peeters
Director of HVAC
Jessica Peeters leads HVAC operations with 18 years of specialized experience. She manages system design and installation for commercial buildings, emphasizing energy efficiency and long-term performance through integrated design-build methodologies.
Scott Christman
Director of Earthwork
Scott Christman directs earthwork operations with expertise in site preparation. His team uses modern equipment to deliver stable foundations, ensuring projects start with precision grading and excavation that meets exacting engineering standards.
Questions
What commercial services does CornerStone One offer?
We provide commercial plumbing, HVAC, earthwork, site utilities, wastewater treatment, and facility service solutions. Our services include design, installation, maintenance, and 24/7 emergency support for diverse industries.
Do you handle emergency HVAC repairs?
Yes, our HVAC division offers 24/7 emergency services with rapid response times. We guarantee fast resolution of critical system failures to minimize downtime for commercial operations.
What areas do you serve?
We primarily serve Northeast and Southeastern Wisconsin, including Brookfield, Oshkosh, Milwaukee, and surrounding regions. Our teams handle projects across commercial, industrial, and institutional sectors.
How does prefabrication benefit construction projects?
Prefabrication reduces field labor by 30-40%, compresses schedules, and improves quality. We manufacture over 70% of plumbing components in controlled environments, ensuring precision and minimizing rework during installation.
Can you handle complex site utility installations?
Yes, our certified team installs water, sanitary, and storm sewer systems. We coordinate complex utility networks to ensure seamless integration with building systems while meeting municipal compliance requirements.
What makes CornerStone One different from other contractors?
We combine BIM technology, prefabrication, and real-time project monitoring to reduce risk. Our single-source approach delivers plumbing, HVAC, and earthwork services with guaranteed on-time completion and dedicated client support.
