What sets the company apart from others?

The company has a dedicated and trained professional staff who ensure that each project is completed from start to finish with the highest level of quality. They guarantee that the HVAC and plumbing units will be performing at an optimal level.

How can I contact the company for an emergency service?

For emergency services, you can fill out the form on the website or call the company's offices, and they will put you in touch with their emergency personnel right away.

Can the company help with upcoming projects or new construction?

Yes, the company has worked with thousands of businesses in the Maryland, DC, Pennsylvania, Virginia, Delaware, and New Jersey areas. They encourage you to contact them to start planning your HVAC and plumbing requirements for your upcoming project or new construction.

Voyager DB

Deep data on millions of local businesses, with verified decision-makers to reveal.

Contact Research

Hand-built prospect lists from human researchers, delivered in 24 hours.

People Search

Find owners and decision-makers by job title, seniority and department.

Chrome Extension

Coldlytics in your browser - prospect any business as you browse the web.

Integrations

Instantly, Smartlead, lemlist, Clay, HighLevel, plus Claude and ChatGPT over MCP.

Voyager DBDeep data on millions of local businesses, with verified decision-makers to reveal.Contact ResearchHand-built prospect lists from human researchers, delivered in 24 hours.People SearchFind owners and decision-makers by job title, seniority and department.Chrome ExtensionColdlytics in your browser - prospect any business as you browse the web.IntegrationsInstantly, Smartlead, lemlist, Clay, HighLevel, plus Claude and ChatGPT over MCP.

PricingPricing AgenciesAgencies BlogBlog

LoginLogin

Charles A. Klein & Sons

$4.0M revenue • 20 employees • 5220 Klee Mill Rd S, Sykesville, MD, 21784, United States

Last Updated Apr 1, 2026

Own this business? Claim & update this listing →

Company Overview

Company Name

Charles A. Klein & Sons

Address

5220 Klee Mill Rd S, Sykesville, MD, 21784, United States

Website

caklein.com

Phone

(410) 549-6960

Approx. Annual Revenue

$4.0M

Employees

Established

1999

Google Reviews

3.8 (56 reviews)

Google Business Category

Air conditioning contractor

About Charles A. Klein & Sons

Charles A. Klein and Sons is an HVAC and plumbing company based in Sykesville, Maryland, with approximately 51 employees. The company has been serving the Mid-Atlantic region for over 40 years, providing commercial and residential services, including emergency repairs and new construction projects.

Business Profile

Read from the Charles A. Klein & Sons website on Oct 24, 2026. Hover an item to see the exact wording it came from.

How Charles A. Klein & Sons works

24/7 emergency serviceⓘ

Recent changes

What changed on the Charles A. Klein & Sons website and Google listing, as detected by Coldlytics on each visit.

Nov 3, 2026
Google Business category is now Plumber
Nov 3, 2026
Google reviews went from 57 to 56
Nov 3, 2026
Google rating went from 3.6 to 3.8

Coldlytics tracks changes like these across millions of businesses, so you can reach companies the moment they add a pixel, start hiring, or switch software.

Find companies by what just changed →

HVAC Companies near Sykesville, MD

Browse all HVAC companies in Maryland →

Frequently Asked Questions about Charles A. Klein & Sons

Technologies Used

Key Decision Makers

Sheldon Kozlowski Owner

Charles Keenan Chief Financial Officer