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Magnolia Companies
Full‑service plumbing, HVAC, site utilities & stormwater specialists in DC‑metro area since 1950
Excavating, installing, and repairing underground water, storm, and sewer pipes.
The company was originally established during the post-war era, laying the groundwork for its future growth.
1970s Expansion
Decade of Growth
Significant expansion into mechanical and plumbing services for large commercial and government projects.
2011 Prefab Shop
Facility Addition
Introduction of a prefabrication shop enhanced operational efficiency and precision in installations.
200 Vehicles
Service Fleet
Maintaining a fleet of approximately 200 vehicles supports broad service coverage and capabilities.
A true family legacy: through four generations, leadership has steered growth from a small local operation to a major DC‑metro player.
Early partnership shifts saw engineering insights and financial acumen blend with trade expertise, setting a strong foundation for expansion.
Today it operates from four locations, handling residential jobs and heavy-duty commercial, site utilities and stormwater projects.
They stand out as one of the few local contractors offering full lifecycle support—from underground utility installation to maintenance.
Typical projects range from HVAC/plumbing installs in new construction to municipal stormwater management and emergency repairs in homes.
Despite broad capabilities, they maintain a family-owned feel, blending legacy know-how with modern infrastructure services.
The company remains privately held, balancing steady financial growth with strategic service diversification.
Culture + Values
Family – We value our Magnolia Companies family and each employee’s family at home
Expertise – Trade experience is in our company’s DNA and we strive for truly exceptional quality
One Team – We have many groups, but one single team
Empowerment – Take personal responsibility for improving yourself and the company, and if you want a seat at the table, grab a chair and join us
Passion – Bring your very best to the job each day
Accountability with Integrity – Set and maintain the Magnolia standard as the highest in the industry and do the right thing when nobody is watching
Environment + Sustainability
200 Vehicles
Service Fleet Size
The company operates a fleet of approximately 200 service and construction vehicles in the DC/Baltimore area, highlighting potential opportunities for improving emissions efficiency in the future.
We are on a sustainable path forward as one
24/7 emergency service to avoid waste from delayed repairs
Maintenance agreements include free yearly inspections to identify issues early and prevent resource waste
Certified credentials (backflow, WARDFlex, Air Bound, BBB) ensure compliance with environmental and safety standards.
Inclusion & Diversity
No specific DEI strategy or gender statistics publicly stated on website or LinkedIn
Mentions of supportive, inclusive environment but no measurable targets or outcomes disclosed
Family‑oriented, team‑focused culture with statements like "supportive and empowering environment" but lacks numeric diversity data
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