Reliable Heating, Plumbing, and Air Conditioning Services for Customers in Arnold, Maryland


In Arnold, Maryland, homeowners know that Horizon is the name to trust when it comes to home maintenance. Whether you need heating and air conditioning support or plumbing expertise, Horizon can help.

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Families rely on us for our professional and prompt service. Our comprehensive warranties and guarantees provide peace of mind, too. How can we help you today?


Air Conditioning

From thermostats to filters to smart home thermostats, Horizon technicians know their way around your AC system. Professional tune-ups keep your air conditioning system in good repair. But if disaster strikes, our technicians are available 24/7 to help fix things quickly. From spare parts to a quick cleanup before summer heat strikes, our team can handle it all.


Tune-ups for your home heating system are essential each winter. The worst time for a furnace or heater to quit is mid-winter. With Horizon, you can enjoy peace of mind throughout the season. Furnaces, heat pumps, and filters are all on our list of items to check and service. Every job is thorough and professional, keeping your family comfortable and safe.


In addition to heating and cooling, Horizon also offers plumbing help. Whether you have a clogged pipe or dripping faucet, we can help. Expert plumbers at Horizon clean drains, restore hot water service and handle sewer leaks and repairs. No job is too big or too small.

Horizon Loves Arnold

Residents in Arnold, MD, 21012, have plenty to enjoy. From Belvedere Park to Arnold Park to Fishpaws Marketplace, there are many places to explore here.

And Horizon loves Arnold and being part of the local community. Serving our customers in and around the city is a pleasure. We hope to continue being part of your neighborhood for years to come.


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