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💰 Homeowner Guide · Marietta, GA

SEPTIC REPLACEMENT COST
IN MARIETTA, GA

Marietta is SepticRooter's home base. We've replaced systems across Cobb County for 35+ years. Here's what it actually costs — and what drives the price on your specific lot.

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Marietta's Septic Context

WHAT MAKES COBB COUNTY PROJECTS DIFFERENT

Marietta and Cobb County are SepticRooter's home territory — we've been doing septic work here since 1989 and know the Cobb County Environmental Health office well. That matters: permit timelines, inspector preferences, and county-specific requirements are things we navigate every week.

Cobb County has a mix of older in-city neighborhoods and newer suburban developments. Older Marietta homes — particularly those built before city sewer expanded in the 1980s and 1990s — often have systems that are 35–50 years old and well past their expected service life.

The county's soil conditions are typical of Metro Atlanta: red Georgia clay that absorbs water slowly, which means perc rates are often marginal and field designs need to account for slower drainage. It's also why regular pumping is so important — a neglected tank destroys clay-soil drain fields faster than sandy soils.

Typical Replacement Costs in Marietta

WHAT YOUR PROJECT WILL LIKELY COST

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Full System Replacement (Tank + Field)

Most full system replacements in Marietta run $11,000–$21,000. Cobb County's mix of lot sizes and soil conditions produce a fairly broad range — smaller lots with tight setbacks can push toward the top end.

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Drain Field Replacement Only

Field replacement in Marietta typically runs $7,000–$15,000. Cobb County's clay soil sometimes requires larger field designs than the original installation, which can add to field-only costs.

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Tank-Only Replacement

Marietta tank-only replacements typically run $4,000–$7,000. Older concrete tanks in Cobb County often show deteriorated baffles and cracked walls by the 30-year mark.

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Alternative System

Marietta lots with challenging soil or setback constraints may require an alternative system at $16,000–$32,000. We're Eljen GSF certified and handle all alternative system types.

Cobb County Permitting

WHAT TO EXPECT FROM THE APPROVAL PROCESS

All Marietta and Cobb County septic replacements require a permit from the Cobb County Public Health Environmental Health Division. The process involves a permit application, site plan, soil evaluation, and pre-construction inspection.

Cobb County's permitting timeline is typically 1–3 weeks for a standard residential replacement. The county is generally efficient and communicative — we've built a good working relationship over 35 years of operating here.

SepticRooter handles the complete Cobb County permit process. We file the application, coordinate soil evaluations, communicate with the county through approval, and schedule the required pre-construction and final inspections. You don't visit a county office.

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Good To Know

COMMON QUESTIONS

I'm in the city of Marietta — does the city have separate rules from Cobb County?

Septic permitting in Georgia is handled at the county level through the county health department, not through city building departments. Whether your address is city of Marietta or unincorporated Cobb County, the permitting authority is Cobb County Environmental Health.

How long does a replacement take in Marietta?

Once Cobb County issues the permit, most residential replacements in Marietta take 1–3 days of on-site work. We start the permit process the day you approve the quote.

My system is in Marietta but near the Kennesaw Mountain area — does that affect anything?

Proximity to Kennesaw Mountain National Battlefield and the Noonday Creek watershed can create additional setback considerations. We assess this as part of every site evaluation and handle any additional permit requirements in-house.

SepticRooter's address is Marietta — does that mean faster service for my Marietta project?

Yes, effectively. Our base of operations is in Marietta, which means our crews aren't driving an hour to reach your property. For inspections, diagnosis, and scheduled work, our response times in Cobb County are typically the fastest in our service area.