Serving Baltimore Since 1929

Heating, Cooling
& Plumbing.
The family that
knows your name.

Three generations of honest, skilled service in northwest Baltimore.
No commission. No upselling. No corners cut.

Pikesville  ·  Owings Mills  ·  Towson  ·  Lutherville  ·  Reisterstown

Call (410) 486-6500 Request a Free Estimate
95 Years Serving
Baltimore
Since 1929 95+ years, same family,
same community
No Commission Techs paid to fix,
not to sell
Licensed & Insured Master Plumber · MD
HVAC Certified
A+ BBB Rating Accredited since 1985 ·
4.9 ★ on Google
Free Estimates Heating, cooling &
plumbing remodels

What We Do

Complete home comfort
from one trusted team

Every service backed by 95 years of experience — and technicians who are never paid on commission.

Heating & Cooling

  • Furnaces & Boilers
  • Heat Pumps
  • Air Conditioning Systems
  • Steam & Hot Water Heating
  • Duct Cleaning & Air Quality
  • Whole-Home Humidifiers
  • Attic Fans
Explore services

Plumbing

  • Hot Water Heaters
  • Faucet & Fixture Repair
  • Complete System Replacement
  • Plumbing Remodels
  • Hydronic & Radiant Systems
Explore services

Geothermal

  • Geothermal Installation
  • System Service & Repair
  • Energy Efficiency Analysis
  • Free Geothermal Estimate
Explore services

Why Klein

The Klein Difference

Four things that have been true since Frank J. Klein started this company — and still are.

We Know Your Name

Not a call center. Not a franchise. When you call, you reach the same team that has served Baltimore families for three generations. We remember your house, your system, and your history with us.

No Commission. Ever.

Our technicians are never paid on what they sell — only on what they do. The recommendation you get is the one your system actually needs. Not the one that makes someone a bonus.

No Corners Cut

Ninety-five years of reputation is worth more than a shortcut. We do the job right the first time, every time. When something is hard to do properly, we do it properly anyway.

Family Business Since 1929

Frank J. Klein founded this company. His family still runs it. Same values, same craft, same northwest Baltimore community — across three generations and counting.

What Customers Say

Neighbors serving neighbors
for nearly a century

4.9
★★★★★
22 reviews
Google · Angi
★★★★★

"We've been dealing with them for 20–30 years. They call us to set up a time, give you an hour range, and they always show in that time. Every single time."

Patricia L. Long-term customer · Angi
★★★★★

"The serviceman arrived right on time and immediately went to work. He did a thorough check and explained each step of the way — fan blades, coils, capacitors. Nothing was skipped."

Robert M. Verified customer · Angi
★★★★★

"I felt perfectly comfortable with every one of their employees — all courteous and respectful. The new unit was extremely quiet and there was no debris left. These are people you can trust in your home."

Susan K. Verified customer · Angi
Geothermal heat pump system in a residential mechanical room — placeholder for actual Klein installation photography Geothermal System

A Smarter Way to Heat & Cool

Geothermal:
Efficient, quiet,
built to last.

Geothermal systems use stable temperatures a few feet below ground to heat and cool your home with significantly less energy than conventional systems. Klein is one of very few contractors in the Baltimore area who installs and services them.

Up to 65% less energy Compared to conventional heating and cooling, reducing your utility bills year-round.
25+ year system lifespan The ground loop lasts 50 years or more. The indoor unit typically outlasts conventional HVAC.
Works in older Baltimore homes Integrates with existing radiator systems, forced air, or as a standalone installation.
Learn about geothermal

Our Territory

Rooted in northwest
Baltimore since day one

Based at 300 Reisterstown Rd in Pikesville — right in the heart of the communities we've served since 1929. If you're our neighbor, you're our customer.

Pikesville Owings Mills Towson Lutherville Reisterstown Randallstown Catonsville Timonium Cockeysville Baltimore City
Frank J. Klein & Sons, Inc.
300 Reisterstown Rd, Suite D · Pikesville, MD 21208
(410) 486-6500  ·  service@frankjklein.com
PIKESVILLE · MD NORTHWEST BALTIMORE SERVICE AREA

Request a Free Estimate

We'll get back to you the same day. No pressure, no sales pitch — just an honest answer about what your home needs.

Estimates for heating, cooling & plumbing remodels are always free.

Get in Touch

Ready to talk to someone
who knows your name?

Call us directly — or send the form and we'll reach out the same day. Serving Pikesville and northwest Baltimore.

Address 300 Reisterstown Rd, Suite D
Pikesville, MD 21208
Hours Monday – Saturday
Closed Sunday