How Much Does Generator Installation Cost in Marietta, GA?
A 22 kW whole-house generator costs $8,500 – $13,500 installed in Marietta (close to the GA average — competitive installer market in metro Atlanta). The primary outage risk is severe storms and tree-related outages. Georgia Power / Cobb EMC serves the area with approximately 18 hours of outages per year.
Generator Installation Cost in Marietta
| Setup | Size | Cost in Marietta |
|---|---|---|
| Essential circuits | 10-16 kW | $5,500 – $9,500 |
| Whole house | 20-22 kW | $8,500 – $13,500 |
| Large home | 24-48 kW | $13,000 – $20,000 |
Marietta sits in Cobb County, one of the most populous Atlanta suburbs. The dense tree canopy that makes the area beautiful also makes it vulnerable to power outages from storms and wind.
Not sure what size you need? Use our sizing guide or interactive calculator for a personalized recommendation. For the full national breakdown, see our installation cost guide.
Marietta-Specific Installation Requirements
Local Code — Cobb County
Cobb County follows the IRC. Standard electrical permit required. Dense tree canopy increases outage risk.
Permits
Permit cost: $100 – $275. Timeline: 1-2 weeks. Your installer handles filing and inspection.
Preferred Fuel: Natural Gas
Atlanta Gas Light (deregulated) provides natural gas throughout Cobb County. Competitive marketer pricing.
See statewide Georgia costs and requirements for comparison.
Power Outage Risk in Marietta
2.5
Outages/year
7h
Avg duration
Severe storms and tree-related outages
Primary risk
Georgia Power / Cobb EMC
Local utility
Hurricane Helene (2024) pushed deep into north Georgia, causing widespread tree damage and power outages across Cobb County.
How Much Does a Home Generator Cost?
Get an instant estimate based on your home size and power needs.
Recommended size
22 kW
Estimated cost
$7,700 – $12,100
Includes equipment, installation, transfer switch, and permits
As low as $83/month with approved financing
Prices vary by location. Enter your ZIP code for local estimates.
FAQ — Generator Installation in Marietta
How much does a generator cost in Marietta?
A 22 kW generator costs $8,500-$13,500 installed. Competitive with the Georgia state average.
How does tree coverage affect outages?
Cobb County's heavy tree canopy is the primary cause of outages. Wind and ice storms bring down branches onto power lines regularly.
Natural gas or propane in Marietta?
Natural gas via Atlanta Gas Light. Deregulated market means you can shop for competitive gas pricing.
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