Generator Installation in Lewisville, TX
Lewisville, TX is a vibrant suburb with a rich history, top-rated schools, and recreational opportunities around Lewisville Lake. Grasten installs and services standby generators here from our Dallas facility, part of our Dallas service area.
Lewisville Outage History
Why Lewisville Homeowners Act
Winter Storm Uri in February 2021 left about 28,000 Oncor customers in Denton County without power on the afternoon of February 16. The May 28, 2024 storms knocked out power to more than 650,000 Oncor customers across North Texas in one day. Three days later about 1,300 Denton County customers were still without power. The June 19, 2026 storms left about 40,000 Oncor customers without power early that morning, more than 4,000 of them in Denton County and nearly 13,000 in Dallas County.
Lewisville at a Glance
Power Outage Profile
The local details that shape your install: who runs the grid, who issues the permit, and which gas partners are in your area.
Oncor owns the poles and wires in most of Lewisville and restores outages; some neighborhoods are on CoServ Electric. Oncor customers choose a retail provider; CoServ members do not.
The City of Lewisville Building Services office issues the permit through MGO Connect, which also takes inspection requests. Grasten pulls the permit with a licensed electrician and schedules the inspections.
Atmos Energy's Mid-Tex Division runs the gas mains in Lewisville; CoServ Gas serves a small part of the city. Streets without a main use a propane tank.
Winter Storm Uri, February 2021: about 28,000 Oncor customers in Denton County were without power on the afternoon of February 16.
Why Lewisville Chooses Grasten
What Makes Us Different
Multi Brand Dealer
From Atmos gas mains to the propane tanks on streets without one, Lewisville homes need a unit matched to their fuel. Because we sell four brands, Generac Prestige status among them, the recommendation follows your house rather than a single product line.
Four Brands, One Recommendation
12 Year Power Plus Warranty
Lewisville Building Services at 151 West Church Street issues the permit, and we apply for it on MGO Connect. Units we install there that are Generac air-cooled qualify for 12-Year Power Plus coverage, exclusive to Canter Power Systems brands.
12 Years of Full Coverage
Customized Mobile Fleet
Three days after the May 28, 2024 storms, about 1,300 Denton County customers were still without power. Oncor restores the lines; until then, remote monitoring sends us real-time alerts and fault codes, and our vans arrive stocked for a first-visit fix.
Ready to Roll
Typically 30 to 90 days from estimate to power on, depending on City of Lewisville permit timelines. Grasten pulls the permit with a licensed electrician and schedules the inspections. See all six differentiators and the full process on the Dallas page ›
Lewisville Pricing
What Does a Generator Cost in Lewisville?
A whole home generator in the Dallas-Fort Worth metro costs $7,000 to $25,000+, installed. Here's where most Lewisville homes land.
Essential circuits (lights, fridge, AC unit)
Most homes under 3,000 sq ft (full house)
Larger homes, multiple HVAC zones
Large homes, home offices, medical equipment
Prices include equipment, in-house installation, transfer switch, City of Lewisville permit fees, and our 12-year warranty. Where a Atmos gas main reaches your street, a natural gas connection typically adds minimal cost compared with a propane tank installation.
Because Grasten Power installs with our own crews instead of subcontractors, we cut out the outside markup that pushes installation costs higher at other companies. As a multi brand dealer, we match you with the unit that fits your home and budget rather than the only one on the shelf. The result is a higher quality installation at a fair price.
Dallas Hub
Part of Our Dallas Region
Full pricing guide, the four-brand comparison, and the complete regional FAQ.
Also Serving Near Lewisville
Also serving Flower Mound, The Colony, Coppell and the rest of Denton County.
Frequently Asked Questions
Lewisville Generator Questions, Answered
Do I need a permit to install a generator in Lewisville?
Yes. The permit comes from City of Lewisville Building Services at 151 West Church Street, applied for through the MGO Connect portal, which also handles inspection requests. A Lewisville address outside the city limits goes through Denton County Development Services on Morse Street in Denton, or the Dallas County Department of Unincorporated Area Services (permits through the MGO portal) for the Dallas County portion. Grasten pulls the permit with a licensed electrician and schedules the inspections.
What knocks out power in Lewisville?
Spring and summer storms with straight-line wind and hail, the occasional tornado, and the kind of winter event that took the ERCOT grid down statewide. Winter Storm Uri in February 2021 left about 28,000 Oncor customers in Denton County without power on the afternoon of February 16. The May 28, 2024 storms knocked out power to more than 650,000 Oncor customers across North Texas in one day. A standby generator starts on its own within seconds and runs until Oncor restores service.
Is natural gas available at my Lewisville address?
Often, yes. Atmos Energy serves Lewisville for most addresses, with CoServ Gas on a small part of the city. Where there is no gas main on your street, the generator runs on propane from a tank on your property. We confirm which applies during the free estimate.
Will my Lewisville HOA allow a whole home generator?
Many HOAs require architectural approval before installation. Grasten Power prepares the application package and goes through the review process for you, so you are not chasing board approvals on your own.
How fast can Grasten reach Lewisville for repairs?
Lewisville is served from our Dallas facility at 10840 Sanden Dr B, about 26 miles away. Our service vehicles are built out for first visit repairs and stocked with the parts that come up most, and our dispatch runs 24/7 with a live phone.
Get Started
Prepare Now Before the Next Storm
Free Lewisville estimate. We pull the permits, then install and service your generator.