ADDON SERVICES LLC

Addon Services LLC specializes in commercial and institutional building construction, with deep expertise in design-bid-build and design-build methodologies for mission-critical federal facilities. The company delivers comprehensive renovations including HVAC system upgrades, electrical modernization, architectural retrofits, fire suppression enhancements, roof refurbishments, and security fence installations. Their technical proficiency spans structural integrity assessments, mechanical system replacements, and compliance-driven renovations in high-security environments, particularly within healthcare and defense installations. A key differentiator is their ability to execute complex, occupied-space renovations with minimal operational disruption, ensuring continuity of sensitive services such as MRI operations and laboratory functions. The contractor maintains a strong, recurring relationship with the Department of Defense and the Department of Health and Human Services. For DoD, they deliver infrastructure resilience projects including vehicle access control upgrades, perimeter security fencing, and retaining wall repairs at military installations. For HHS, particularly NIH and NIEHS facilities, they execute intricate building system overhauls—replacing air handling units, upgrading fire sprinklers, and rehabilitating aging infrastructure—often under stringent operational and safety protocols for research and clinical environments. Their primary industry focus is on NAICS 236220 (Commercial and Institutional Building Construction), where they serve as a trusted renovator of federal laboratories, administrative buildings, and support infrastructure. They also maintain active capability in highway and bridge construction (NAICS 237310), demonstrating versatility across civil and building sectors. Their market positioning centers on mission-critical, low-disruption renovations in regulated, high-availability environments. Addon Services LLC is a Women-Owned Small Business and Woman-Owned Business certified, headquartered in Alexandria, Virginia. The firm operates as a small business entity with a focused presence in federal government markets, leveraging its certifications to deliver responsive, compliant, and technically rigorous construction services to defense and health agencies nationwide.