Service Area · Cobb County
Generac generator service in Marietta, GA.
Atlanta Generac Maintenance services Generac home standby generators in Marietta, GA, from the historic districts around Marietta Square to the neighborhoods off Whitlock and Powder Springs Road. In Marietta, your electric provider and permit office depend on whether you are inside city limits, so we start every job by confirming both.
Call (770) 758-3506 Request an estimatePower
Inside city limits, most homes use Marietta Power (BLW). Outside, a Marietta address is often Cobb EMC or Georgia Power.
Permits
City addresses use Marietta Building Inspections. Unincorporated addresses use Cobb County Community Development.
Fuel
Marietta ZIP codes are in Atlanta Gas Light's service area, so natural gas is often available.
Why Marietta homeowners plan for outages
Marietta has seen what winter can do to the grid. During the heavy snow of December 8 and 9, 2017, Marietta Power reported 13,000 outages, about a quarter of its entire system, and the city called it the worst storm damage to its power grid in 30 years. Snow-loaded limbs, not wind, brought the lines down.
Ice is the other winter risk. During Winter Storm Fern in January 2026, Marietta Power had just over 1,000 customers out on the morning of January 25 and restored nearly all of them by mid-afternoon, after the city mobilized its full power crew plus contract lineworkers and tree trimmers. Summer storms count too: when Tropical Storm Zeta crossed metro Atlanta in October 2020, many stoplights in Marietta went dark.
A standby generator covers the hours, or days, between a tree on the line and a crew reaching it. In Marietta that usually means keeping heat or air conditioning, refrigeration, and a sump pump running.
Marietta Power, Cobb EMC, or Georgia Power
Marietta is one of the few metro cities with its own electric utility. Marietta Power, run by the Board of Lights & Water since 1906, serves more than 45,000 customers. Many homes inside city limits are on Marietta Power, while homes with a Marietta mailing address outside the city are often served by Cobb EMC or Georgia Power. Your bill is the reliable answer.
Each provider has its own outage tools: the Marietta Power outage map and Outage & Storm Center, the Cobb EMC outage map, and the Georgia Power outage map. For county-wide warnings and shelter information, follow Cobb County Emergency Management.
Permits: city of Marietta or Cobb County
Where you file depends on where the house is, not the mailing address. Inside city limits, the City of Marietta Building Inspections division requires a permit to install or alter any electrical, gas, mechanical, or plumbing system, which covers a standby generator, its transfer switch, and its gas line. Permits are filed online.
Homes in unincorporated Cobb, including much of East Cobb, use Cobb County residential permitting, whose inspectors enforce codes in the unincorporated areas of the county. For an installation or transfer-switch work, we confirm the correct office from your address before filing.
Historic homes and generator placement
Marietta has five National Register historic districts, including Northwest Marietta, Whitlock Avenue, Church Street–Cherokee Street, Washington Avenue, and Atlanta–Frasier Street, plus the Kennesaw Avenue local historic district designated in 2013. The city's historic districts page explains the local rules.
Older homes often bring older electrical panels, which can mean a panel upgrade or sub-panel before a transfer switch goes in. Placement deserves care too: a generator needs Generac's clearances from windows and doors, and on a historic property you may also want it out of sight from the street. If your home is in a local historic district, check with the city before exterior changes.
Trees are less of a paperwork issue. Marietta's tree protection ordinance exempts a single residential lot with one dwelling of up to two units, outside the infill overlay, so most homeowners can trim or remove a tree near the generator site without a city permit.
Around Marietta: the Square, the battlefield, and East Cobb
Marietta is the Cobb County seat, home to about 63,500 people, with Marietta Square at its center. The city's historic neighborhoods spread from the Square: the Northwest Marietta Historic District covers about 230 acres and was listed in 1975, and the Whitlock Avenue district covers about 82 acres with more than 100 contributing buildings. Many homes there are well over a century old, so a panel review comes before any generator work.
About three miles northwest, Kennesaw Mountain National Battlefield Park covers 2,884 acres of wooded ridges between Marietta and Kennesaw. The park's visitor center and trails draw people from across the metro, and its ridges are a familiar landmark from much of the city.
Many people with a Marietta mailing address actually live in unincorporated Cobb, including much of East Cobb. That affects both the electric provider and the permit office, so we confirm the address details before quoting an installation. Natural gas is available across Marietta ZIP codes through Atlanta Gas Light, and Georgia's deregulated gas market means you buy it from a certified marketer.
Generator care through the Marietta year
- Fall: the best time to prepare for ice and snow. Book a battery test and inspection so the unit is ready before December.
- Winter: after an ice storm or long outage, check run-hours; an oil change may be due early.
- Spring: clear pollen and leaves from the enclosure during scheduled maintenance.
- Summer: if a thunderstorm leaves the generator showing a red light, see generator repair.
Common generator questions in Marietta, answered
It depends on your address. Many homes inside Marietta city limits are served by Marietta Power, the city utility run by the Board of Lights & Water. Homes with a Marietta mailing address outside the city are often on Cobb EMC or Georgia Power. The provider on your electric bill is the reliable answer, and each has its own outage map.
Yes, for a permanently installed standby generator. Inside city limits, Marietta Building Inspections requires a permit to install or alter electrical, gas, mechanical, or plumbing systems. In unincorporated Cobb County, permits go through Cobb County Community Development. Portable generators used with cords do not need a permit.
Winter storms have been the worst. In December 2017, heavy snow caused 13,000 Marietta Power outages, about a quarter of the system, which the city called the worst grid damage in 30 years. Ice from Winter Storm Fern in January 2026 caused shorter outages for about 1,000 customers.
Usually, with some planning. Older homes may need a panel upgrade or sub-panel, and the generator must meet Generac's clearances from windows and doors. Homes in a local historic district, such as Kennesaw Avenue, may face rules on exterior changes, so check with the City of Marietta before choosing a location.
Generac's interval for air-cooled home units is every 200 run-hours or two years. In Marietta, a fall service is especially useful because the area's worst recent outages came from winter snow and ice. A spring visit to clear pollen and leaves is a good second check.
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