Heating & Cooling
SuperTech HVAC Services
Lutherville-Timonium, Maryland
A Lutherville-Timonium HVAC business serving the Baltimore area, with cooling, heat-pump, furnace, boiler, and ductless services.
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Baltimore.
Five trades. Local perspectives. Explore company backgrounds, stated specialties, and the questions worth bringing to your next project.
Baltimore-Columbia-Towson, MD metropolitan area
Roofing
Columbia Roofing
Columbia, Maryland
A Columbia roofing and exterior contractor with repairs, replacement, siding, gutters, windows, and storm-restoration services.
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Remodeling
Owings Brothers Contracting
Sykesville, Maryland
A Sykesville remodeling business serving the Baltimore region, with kitchens, bathrooms, additions, in-law suites, and whole-house work.
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Plumbing
Len The Plumber Heating & Air
Halethorpe, Maryland
The Baltimore-area operation of a regional home-services company, with plumbing, drain, sewer, and water-heater work.
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Electrical
Haas & Sons Electric
Millersville, Maryland
A Millersville residential electrical business with service across Anne Arundel and Howard counties, including panels, lighting, and EV charging.
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Companies may be based in the metro or serve it from a nearby location. Read each feature for stated coverage, source notes, and the limits of the checks performed. Confirm availability, credentials, and the proposed scope directly for your project.
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All marketsHow we define and research this collection
Our initial collection covers the 50 largest U.S. metropolitan statistical areas by July 2025 population, using the Census Bureau’s Vintage 2025 estimates. Metropolitan areas include neighboring cities and suburbs; they are not limited to city boundaries. The scope covers the 50 states and Washington, D.C.
Each market has one feature in heating and cooling, roofing, remodeling, plumbing, and electrical. We match company materials with independent business records and identify the sources and review dates. Some businesses are regional operators or local branches. Published service areas vary by company.
Selection considers an identifiable local operation or stated local coverage and a favorable independent business record or separately identified industry recognition. Inclusion is editorial coverage, not a ranking or a guarantee of workmanship. A BBB letter grade is a business rating, not a customer-review score. Check the profile’s notes and current credentials for your project.
U.S. Census metropolitan population estimates · Our research approach