Important update as of March 24, 2020

With the health and safety of our employees and their families as our top priority, we will be closing our office and showroom through April 13, 2020 (subject to change).

We will still be offering plumbing and HVAC services that are essential to the operation of your residence.

Our heating & cooling techs and plumbers are taking extra precautions during this time and have masks, gloves, booties, hand sanitizer and disinfectant wipes on their trucks.

If service is needed, please call us at 248-349-0373 and follow the prompts for emergency service to be connected with a service manager. You can also submit an online service request form on our website, or send us a message through our Facebook page.

At this time, service will still be at normal rates during normal business hours.

We hope everyone stays safe and healthy during these times.

– Jim Long and Allison Long

commercial piping installation
Water Heater Repair


The skilled professionals at the Long Companies have the experience to handle mechanical, plumbing, piping, heating and cooling projects of all sizes.

From installing a process piping system in a new auto assembly plant, an HVAC system at Detroit Metro Airport, and a pump and piping installation for a Michigan municipal water supply, to replacing a homeowner's plumbing fixtures or water heater, we do it all.

The Long Companies provide new installations, replacements, maintenance services and repairs, including 24‑hour emergency services.

Family owned and operated, each of our four divisions (commercial mechanical / plumbing / heating & cooling / kitchen & bath remodeling) specializes in effective solutions to meet our customers' needs.

Quality workmanship, knowledgeable and dependable technicians, and exceptional customer service come standard with every job.

Variety of Services
Did you know we do…

  • Complete Building Mechanical Systems
  • Industrial Paint Systems
  • Process Piping Systems
  • Boiler Installation & Repair
  • Sump Pump & Backup Systems
  • Sewer Maintenance
  • Water Heaters
  • Gas Line Installation / Appliance Hookups
  • Furnace, Air Conditioning & Air Quality Systems

The Long Companies are now a

Certified Woman's Business Enterprise Logo

Long Kitchen & Bath Design Gallery in Downtown Northville

Visit our Long Kitchen & Bath Design Gallery in Downtown Northville

Design  •  Fixtures & Accessories  •  Remodeling Services

Copyright © 2009 Long Mechanical, Inc. & Long Plumbing Co.
Serving Southeast Michigan and other Midwest States