Plumbing, HVAC & Electrical Services in Frederick, MD

Larry & Sons Plumbing, Heating, Cooling & Electrical is proud to offer the comprehensive range of home service solutions that Frederick families have trusted since 1960.

With an unwavering commitment to delivering personalized solutions and 100% satisfaction guaranteed, you can rest assured that you’ll always receive the five-star service experience you deserve when working with our expert team.

Schedule plumbing, HVAC, or electrical services in Frederick, MD, by contacting us online today.

Full-Service Plumbing

From leaking fixtures and foul odors to slow-moving drains and loud noises in pipes, the instant you recognize any signs of needed plumbing service, we’ll be there to help. We have experience with:

Sewer & Drain Services

Using sophisticated video camera pipe inspection technology, our drain and sewer service experts can pinpoint the precise location of any problem with your wastewater management system. Our drain and sewer services include:

Have an emergency that can't wait? Call Now! (301) 733-5428
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HVAC Services

With decades of HVAC service experience, our team is uniquely capable of servicing all comfort systems and the components that make them work. Turn to our team for:

Heating Services

From gas and electric furnaces and boilers to heat pumps and geothermal systems, Larry & Sons can service virtually any heating system you may have. We’re here to assist with:

Air Conditioning Services

With average highs of 87º F, Frederick families know firsthand how essential a fully functioning air conditioner is for fighting off the sweltering summer heat. We offer complete cooling solutions to ensure lasting comfort, no matter how high the temperature climbs. We offer:

Indoor Air Quality Solutions

We offer indoor air quality solutions that target airborne contaminants in your indoor air supply, as well as whole-home performance testing to help extend your HVAC’s lifespan and maximize energy efficiency and comfort. 

Trust Larry & Sons to install:

Have an emergency that can't wait? Call Now! (301) 733-5428
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Electrical Services

Attempting to DIY electrical work in your home is never recommended, as it can lead to serious safety issues and damage your electrical devices. Instead, trust the knowledgeable electricians at Larry & Sons for the professional electrical solutions you need, such as:

Whole-Home Generator Services

Unlike portable generators that require manual ignition, whole-home generators kick on automatically at the first sign of a power outage. We offer the standby generator services families need to ensure their systems always remain operational during a blackout:

  • Generator repair
  • Generator installation and replacement
  • Generator maintenance
Have an emergency that can't wait? Call Now! (301) 733-5428
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Proudly Serving Frederick, MD & Surrounding Areas

At Larry & Sons, we’re committed to serving our community. We gladly provide HVAC, plumbing, and electrical services in Martinsburg and surrounding neighborhoods, including:

  • Historic District
  • Renn Quarter
  • Whittier
  • Tuscarora Creek
  • Spring Ridge
  • And more

Request Home Services in Frederick, MD

With over 60 years of dedicated service experience, Larry & Sons is uniquely positioned as the preferred source for reliable home services in the Frederick area. Just read our reviews!

Our uniformed technicians are committed to delivering respect and courtesy with every visit, wearing shoe covers and tarping service areas for your added peace of mind.

Our satisfaction guarantee and lifetime repair guarantee ensure lasting solutions for all your home’s essential service needs. We always do our best to make the service seamless, with coupons and financing options

Schedule home services with Larry & Sons by contacting our team online today.

Frequently Asked Questions

High humidity in Frederick can make your HVAC system work harder to maintain comfort, reducing efficiency and increasing wear. Excess moisture can also impact indoor air quality, making proper system sizing and maintenance especially important.
You should consider upgrading your HVAC system if it’s over 10 to 15 years old, needs frequent repairs, or struggles to maintain consistent temperatures. Newer systems offer improved efficiency, lower energy costs, and better performance for changing seasonal demands.
Signs of hidden leaks include unexplained increases in your water bill, musty odors, damp spots on walls or floors, and reduced water pressure. Early detection helps prevent structural damage, mold growth, and costly repairs.
A blocked or damaged sewer line may cause multiple slow drains, sewage odors, gurgling noises, or backups in lower-level fixtures. These signs often indicate a deeper issue that requires professional inspection and repair.
Upgrading your electrical panel improves safety, supports modern appliances, and reduces the risk of overloaded circuits. It also increases capacity for future upgrades, ensuring your home can handle today’s energy demands efficiently and reliably.
You can improve energy efficiency by installing LED lighting, a smart thermostat, and energy-efficient appliances. These upgrades reduce electricity usage, lower utility bills, and provide better control over your home’s energy consumption.
Our Reviews

See What Your Neighbors Are Saying.

What a GREAT company! I only had two small jobs. The two ladies I spoke with were so kind and helpful. An electrician arrived within a few hours. He was fantastic, a man who knows his job. Very friendly and knowledgeable. He fixed everything quickly and wore shoe covers in the house. I HIGHLY recommend Larry…

Cathy G.

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Cathy G.

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Dave was great to work with. We called for emergency AC help. He arrived when expected and was very professional. He had everything on his truck to repair the issues and explained what was needed, where we stood with our system, what our options were on proceeding with the next step, and what the costs would…

Bernadette C.

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Bernadette C.

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Larry and Sons was able to schedule a technician out to my residence after scheduling for next day service. They even offered to place me on the waitlist for same day scheduling should any cancellations occur. Lyle Hickey, the technician was very knowledgeable, professional, efficient, and extremely patient during my service call. He diagnosed the issue…

Maya A.

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Maya A.

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I am thrilled with the service Tim Swartz and Larry and Sons provided for our plumbing needs. Tim did a thorough inspection of all the plumbing and found some issues that we can catch early before they become major problems. Tim was very low key and explained everything to a non-plumber girl like me so I…

Pamela R.

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Pamela R.

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The company scheduler was very helpful and got us a same day appointment. Matt, the technician was very prompt and professional and even provided advice on the issue. The price was reasonable even though the technician traveled from Maryland to our home in Martinsburg WV. I would recommend Larry and Sons for plumbing repairs to anyone.

Tomas M.

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Tomas M.

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Proudly Serving Maryland, Pennsylvania & West Virginia

Washington County | Frederick County | Jefferson County | Franklin County | Berkeley County