Costello Construction Employee Directory

ConstructionMaryland, United States51-200 Employees

Costello Construction is a commercial construction contractor based in Columbia, Maryland, serving the Baltimore/Washington corridor. It works with both public and private sector clients, focusing on projects such as corporate offices, fitness facilities, higher education, and urban infrastructure. The firm provides services that span from pre-construction analysis to design-build and sustainable construction.

Founded in 1993, Costello Construction emphasizes a hands-on management approach and in-house execution. It self-performs a portion of its work—predominantly site work and concrete—to support scheduling and cost control. Upper management directly oversees each project from inception to completion to help ensure on-time delivery and budget adherence.

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