Mold Inspection & Remediation in Marietta, GA

NCEI's estimated 1991–2020 normals for a volunteer rain gauge near Smyrna, the closest one in Cobb County, come to about 51 inches of precipitation a year, with rain in every month and long, muggy summers that slow drying indoors.

Cobb County has seen what creeks can do. During the September 2009 floods, the U.S. Geological Survey found that flooding on Sweetwater, Butler, and Powder Springs creeks in Cobb County far exceeded the estimated 500-year flood, and Noonday Creek, which runs through northeast Cobb, also flooded severely. Cobb County reported that the 2009 flooding reached more than 1,600 homes countywide, many of them outside the 100-year floodplain.

Most mold in Marietta homes starts smaller: a finished basement that seeps after long rain, a crawl space under an older house near the Square, or an attic air handler that overflows onto the ceiling below. The EPA warns that mold becomes likely if wet materials are not dried within 24 to 48 hours.

There is no Marietta-only price survey, so these figures come from the wider metro: what Atlanta-area homeowners report for inspections, a 2026 Atlanta guide for air sampling, and Atlanta contractor guides from 2025 and 2026 for square-foot and job pricing. Two things push a Marietta job up: crawl-space access under older houses, and lower levels that took creek water and need drywall and flooring replaced. See the remediation cost guide.

No Georgia agency licenses mold inspectors or remediators, so a Marietta homeowner does the vetting. Before work begins, ask for a certificate of general liability insurance, proof of the crew's training or certifications, and a written scope that lists the rooms, the materials to be removed, and how the result will be checked.

Older homes near Marietta Square and in Fair Oaks often need subfloor, framing, or drywall repairs after the mold is gone. Residential projects over $2,500 generally require a Georgia residential or general contractor license, which you can verify with the Secretary of State. Georgia allows one company to both test and remediate; hiring a separate inspector for the scope and final check is the way to keep the diagnosis independent. See the Georgia page.

Cobb County learned in 2009 that a homeowners policy does not cover creek flooding: water that rose from Sweetwater, Butler, Powder Springs, or Noonday creeks, or any other stream, is flood water and needs a flood policy. Many of the homes that flooded then were outside the mapped floodplain, so flood insurance is worth pricing even if your lender does not require it.

Mold that follows sudden water damage inside the house, such as a split supply line or an overflowing attic air handler, is more likely to be covered by a homeowners policy, usually up to a mold limit. Basement seepage after long rain is usually treated as gradual. Photograph everything before cleanup and report promptly; the Georgia Office of Commissioner of Insurance and Safety Fire takes complaints. See does insurance cover mold.