Heating & Cooling
Air-Tro
Monrovia, California
A family-owned Monrovia HVAC company serving the San Gabriel Valley and greater Los Angeles, with installation, repair, and maintenance services.
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Los Angeles & Orange County.
Five trades. Local perspectives. Explore company backgrounds, stated specialties, and the questions worth bringing to your next project.
Los Angeles-Long Beach-Anaheim, CA metropolitan area
Roofing
Chandler’s Roofing
Gardena, California
A Gardena roofing company serving Los Angeles and Orange County, with work spanning shingle, tile, flat, and metal roof systems.
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Remodeling
Custom Design & Construction
El Segundo, California
An El Segundo design-build firm focused on South Bay residential remodeling, including whole-home renovations, additions, kitchens, and bathrooms.
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Plumbing
Mike Diamond Services
Los Angeles, California
A Southern California home-services business offering plumbing, drain, water-heater, HVAC, and electrical work across multiple Los Angeles-area locations.
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Electrical
Powell Electric
Los Angeles, California
A Los Angeles electrical contractor whose published services range from troubleshooting and lighting to panel upgrades, rewiring, and EV-charger installation.
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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