Storm-driven power outages happen across the DMV every year, and whole-home backup generators have become standard equipment for homeowners who do not want to lose heat, water, refrigeration, or medical equipment when the grid goes down. Tim Whistler Plumbing installs whole-home generators across the DMV with the full gas, electrical, and permitting work handled in-house.
Three coordinated trades: (1) gas (running a dedicated gas line from the meter to the generator, often a substantial distance, with appropriate burying and protection); (2) electrical (installing a transfer switch at your electrical panel, sizing the circuits the generator will serve, wiring the generator to the transfer switch); (3) mechanical (placing the generator on an appropriate pad with code-required clearances from windows and structures). Our team is licensed across all three trades and handles the full install under one schedule.
We assess your home's electrical load, recommend the right generator size (typical residential range 14kW to 26kW for standby coverage), plan the gas line and electrical routing, pull the appropriate county or DC permits, prepare the generator pad, install the gas line and transfer switch, install and commission the generator, and coordinate the inspections. We also handle annual maintenance contracts to keep the unit ready for the next outage.
Standard 14kW to 22kW whole-home generator installations in the DMV typically run $8,000 to $18,000 installed, depending on generator size, gas line distance, transfer switch complexity, and any electrical service upgrades required. Larger generators (24kW plus) and properties with longer gas line runs can run $18,000 to $25,000 or more. We provide written, itemized quotes.
Depends on what you want to keep running during an outage. A typical 22kW generator covers most residential needs (HVAC, water heater, refrigerator, lighting, well pump if applicable, key outlets). Larger homes with multiple HVAC zones, pool equipment, or EV charging often need 26kW or more. We size based on your specific load profile.
Yes. Annual maintenance contracts include oil changes, filter changes, battery testing, transfer switch testing, and a full system run cycle. Annual maintenance is required to maintain manufacturer warranty coverage on most units.
Call Tim Whistler Plumbing at 1-866-477-6190 for a free in-home assessment. Licensed across gas fitting, electrical, and plumbing (WSSC 6119360, VA 2710020030, VA 2710059613, DC PGM-1002028).