Family Owned & Operated • Licensed & Insured • 24/7 Emergency Services
Built On Service You Can Count On
Alliance Trade Services provides HVAC, plumbing, electrical, indoor air quality, and commercial HVAC services for homeowners and businesses in Prince George’s County, Anne Arundel County, and nearby Southern Maryland communities.


Trusted HVAC and Multi-Trade Services Since 2015
Alliance Trade Services provides heating, cooling, plumbing, electrical, indoor air quality, and commercial HVAC services for homes and businesses throughout our Maryland service area. Since 2015, our company has focused on dependable service, clear communication, and work that is done the right way.
Based in Upper Marlboro, Maryland, our team helps with urgent repairs, planned replacements, preventive maintenance, and larger commercial service needs. We serve local homeowners, business owners, and property managers who need practical solutions without unnecessary delays or high-pressure sales tactics.
Whether your home needs AC repair, your business needs rooftop HVAC service, or your property needs plumbing or electrical support, Alliance Trade Services works to make the next step clear.
Local, Licensed, and Built on Clear Communication
When a heating, cooling, plumbing, or electrical issue interrupts your day, you need a contractor who can explain the problem clearly and recommend a realistic solution. Alliance Trade Services was built around that kind of service.
Our technicians show up prepared, look at the full issue, and help you understand what needs attention. That may mean a repair, a system replacement, preventive maintenance, or a safer long-term upgrade.
Reliable service comes from consistency, honest communication, and doing the work correctly the first time. That approach guides every residential and commercial project we take on.
What Alliance Trade Services Provides
Alliance Trade Services supports the core systems that keep homes and businesses comfortable, safe, and functional. Our services include repair, replacement, installation, maintenance, and system support across multiple trades.
- Residential Air Conditioning Services
- Residential Heating Services
- Residential Plumbing Services
- Residential Electrical Services
- Indoor Air Quality Solutions
- Commercial HVAC Services
That range allows customers to work with one local company for many of the systems that affect daily comfort, safety, and reliability.
Residential and Commercial Service Support
Alliance Trade Services works with both homeowners and commercial property owners. Each property has different needs, so our team approaches every job based on the system, the space, and how the issue affects the people inside.
For homeowners, that may include heating repair, air conditioning replacement, heat pump service, ductless mini split installation, water heater service, drain cleaning, electrical upgrades, or indoor air quality improvements.
For businesses, that may include commercial HVAC repair, preventive maintenance, equipment replacement, rooftop HVAC unit service, commercial boiler support, temporary cooling, or heating and cooling service for office, retail, restaurant, church, or mixed-use spaces.
Proud Trane Dealer for Heating and Cooling Equipment

Alliance Trade Services is proud to partner with trusted HVAC manufacturers, including Trane, to provide dependable heating and cooling solutions for homes and businesses throughout Maryland.
Equipment quality matters because heating and cooling systems are long-term investments. A properly selected and installed system can improve comfort, support energy efficiency, and reduce the risk of recurring performance issues.
Our team helps customers choose equipment based on the property, comfort needs, system size, and long-term reliability. Professional installation and setup are just as important as the equipment itself.
- Reliable heating and cooling performance
- Long-term HVAC system durability
- Improved indoor comfort
- Modern heating and cooling technology
- Support for residential and commercial properties
- Professional installation and system setup
Meet Our Leadership
Alliance Trade Services is led by Theodore "Teddy" McKenzie, owner and president of the company. Under his leadership, the company has continued to grow by focusing on dependable workmanship, responsive service, and long-term customer relationships.
That leadership approach shows up in how the team communicates, how technicians explain options, and how service recommendations are made. The goal is to help customers make informed decisions about their heating, cooling, plumbing, electrical, indoor air quality, and commercial HVAC systems.
Why Customers Choose Alliance Trade Services
Customers choose Alliance Trade Services because they want a local company that is responsive, practical, and clear about the work being performed.
- Local Maryland company based in Upper Marlboro
- Service since 2015
- Licensed and insured technicians
- Residential and commercial experience
- Heating, cooling, plumbing, electrical, and IAQ support
- Preventive maintenance and replacement solutions
- Clear communication without high-pressure sales tactics
Alliance Trade Services, 301-627-4822, provides dependable residential and commercial trade services for local homes, businesses, and properties.
Serving Our Maryland Service Area
From our location in Upper Marlboro, Alliance Trade Services serves homeowners and businesses throughout Prince George's County, Anne Arundel County, and nearby Southern Maryland communities.
Our service area includes communities such as Bowie, Upper Marlboro, Laurel, Lanham, Crofton, Odenton, Edgewater, and surrounding Maryland neighborhoods. We understand the mix of older homes, newer communities, commercial buildings, humid summers, and cold winter stretches that shape service needs in this region.
Schedule Service With Alliance Trade Services
Whether you need HVAC repair, plumbing support, electrical upgrades, indoor air quality solutions, or commercial HVAC service, Alliance Trade Services provides dependable solutions throughout our Maryland service area. Call 301-627-4822 to schedule service with Alliance Trade Services.

