K.G. Johnson is a dependable, bonded, and insured Commercial Mechanical Contractor based in Frederick, MD. Family owned and operated. Servicing several cities around the Maryland and Virginia area. Providing complete plumbing and HVAC services for new construction, renovations and more.

Protect What Matters with K G Johnson Inc

Looking for trusted Mechanical Contractor services in Frederick? K G Johnson Inc is your local expert for alarms, surveillance, access control, and more. Whether you're securing your home or business, get help from pros who know how to keep you safe. Fast. Simple. No pressure.

Fast. Easy. Hassle-Free.

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