About Us

For nearly 20 years, our experienced staff has constructed facilities of the highest quality and provided top-notch construction expertise for a wide-ranging spectrum of projects in both the public and private sectors.

We pride ourselves on completing our projects on time and under budget – every time. With the ability to self-perform work—from the excavation of a site to the carpentry and finishing touches—we guarantee that all of our projects receive focused attention on every aspect of the build process. Simply put, owners appreciate the fact that we invest heavily in each and every one of our projects. By the end of most projects, we are not only recorded as the general contractor, but also as the contractor who has physically put the most work in place on our projects.
Additionally, our fleet of wholly owned heavy equipment, concrete equipment and tools further enhance the self-performance capabilities of the company.

Staffing approximately 65 industry professionals, we boast a seasoned workforce that includes LEED AP project managers, Licensed Architects, and an entire crew of OSHA certified field employees. As a team, we are always ready to roll up our collective sleeves and tackle a project armed with hard work, dedication and knowledge. From day one, every Costello project receives personal attention from management and enthusiastic commitment from every team member involved.

Our strong client relationships stem from our commitment to our work, which, in turn, is evidenced by the fact that we have completed every single one of our projects on time and without claims. All projects have also been completed with the highest level quality and all have been completed with an unwavering commitment to safety. Our commitment to the quality of our projects has led to Costello projects winning top honors for the AIA, ABC and AGC.

Throughout our company history, our core principles have remained unchanged: client satisfaction is paramount, we only build the highest quality projects safely and timely, and we always comply with the terms and conditions of the contracts we enter into.