Generators Contractors in Manassas, Virginia
Standby and portable generator installation and service..
Whole-home standby generators automatically provide backup power during outages, protecting against food spoilage, frozen pipes, sump pump failure, and loss of medical equipment. Natural gas or propane-fueled standby generators (typically 12–24 kW for residential use) start within seconds of a power outage via an automatic transfer switch. Installation involves an electrical subpanel or whole-house transfer switch, a concrete pad, gas line connection, and compliance with setback and noise ordinances. Portable generators serve as a lower-cost option for partial backup but require manual setup and fuel management.
137
Listed contractors
$5k–$18k
Typical cost
What to look for when hiring a generators contractor
- ✓Ask the installer to perform a load calculation to properly size the generator for your home.
- ✓Confirm the estimate includes the transfer switch, concrete pad, gas line, and all permits.
- ✓Ask about warranty terms — most major brands offer 5-year limited warranties.
- ✓Verify the installer is authorized by the generator manufacturer (Generac, Kohler, Briggs & Stratton).
Generators contractors in Manassas(60 listed)
How much does generators cost in Manassas?
Portable generator: $500–$2,000. Standby 12 kW: $5,000–$8,000 installed. Standby 22 kW: $8,000–$15,000 installed. Transfer switch adds $500–$1,500 if not included.
Generators contractors in Manassas — FAQ
How many generators contractors are in Manassas?
EdgeLocal lists 137 licensed generators contractors in Manassas, Virginia. All listings are sourced from state licensing registries.
What is the average rating for generators contractors in Manassas?
Generators contractors in Manassas are listed on EdgeLocal with ratings sourced from Google Business profiles. Use the directory to compare rated contractors near you.
Do generators contractors in Manassas need to be licensed?
Yes. Virginia requires generators contractors to hold a valid state license. Always verify a contractor's license is current and in good standing before signing any contract or allowing work to begin.
How do I find a reliable generators contractor in Manassas?
Start by verifying the contractor holds a valid Virginia license. Check their Google rating and read reviews. Get at least three written estimates. Confirm they carry general liability and workers' compensation insurance. Ask for references from recent Manassas jobs.
General Generators FAQs
What size generator do I need for my home?
Sizing depends on what you want to power during an outage. A 12–14 kW generator handles essentials: refrigerator, sump pump, furnace, lights, and a few outlets. A 16–20 kW generator adds central air conditioning and a well pump. A 22–24 kW generator can power an entire average home including an electric range and dryer. Your installer should perform a load calculation based on your electrical panel to recommend the correct size. Oversizing wastes fuel and money; undersizing causes the generator to overload and shut down when you need it most.
How much does a whole-house generator cost?
A whole-house standby generator costs $5,000–$18,000 installed depending on size and fuel type. A 12 kW air-cooled unit runs $5,000–$8,000 installed. A 22 kW unit runs $8,000–$15,000 installed. Larger liquid-cooled units (25+ kW) cost $12,000–$20,000+. Installation includes the generator, automatic transfer switch, concrete pad, gas line connection, and permits. Natural gas is the most convenient fuel (no tank to refill); propane requires a tank ($1,000–$3,000 for a 500-gallon buried tank). Annual maintenance costs $150–$300.