Mold Removal Cost Calculator for Kennesaw, GA

Enter what you see and where. The tool returns a planning range for professional mold removal. It runs in your browser and sends nothing anywhere.

Last reviewed: November 2026.

Mold remediation cost per square foot

Published cost guides put professional mold remediation at about $10 to $25 per square foot. Crawlspaces and attics often cost more per square foot because crews work in tight spaces with protective gear. Typical totals quoted by one guide are $500 to $2,000 for a crawlspace and $1,000 to $4,000 for an attic, and a different guide gives a wider attic range of $1,000 to $7,000. Our calculator uses $10 to $25 per square foot, scales it by location, and sets a floor of $500.

The multipliers are our own planning assumptions. Hidden mold adds up to 30 percent for investigation. Removal of drywall, insulation or subfloor is added as a separate line. Testing is priced by the tester and not included.

Crawl space mold removal cost, attic mold cost and the cost factors

Size is only the start. Cost goes up with access, the number of materials that have to be removed, whether containment is needed, and how many rooms are affected. A small patch on a bathroom wall may only need the drywall cut out and the area cleaned. A crawlspace with growth on joists, insulation and a vapor barrier needs removal of the insulation and barrier, HEPA vacuuming and cleaning, and drying. An attic usually needs insulation removal and sometimes sheathing cleaning. Whole-house jobs can exceed $10,000 when mold has spread through several rooms and the HVAC.

Fix the moisture source first

Mold returns if the water does. A roof leak, a plumbing leak, a wet crawlspace or a bath fan that vents into the attic all have to be fixed before or alongside remediation. If the cause is not fixed or not known, the calculator warns you, because paying for removal and then having growth return is the most expensive outcome. Our structural drying work dries the structure, and a plumber, roofer or drainage contractor fixes the source.

Crawlspace encapsulation vs remediation

Remediation removes mold and dries the space. Encapsulation seals it, usually with a heavy vapor barrier on the floor and walls, sealed vents and a dehumidifier. One guide quotes encapsulation at $1,500 to $15,000. They are different jobs. After remediation, encapsulation can keep moisture from returning, but it is a separate decision and a separate contractor.

Humidity in Kennesaw summers

Georgia summers keep indoor humidity up, and crawlspaces on red clay hold moisture long after rain. A wet crawlspace in June can grow mold by July. A hygrometer in the crawlspace or attic is cheap, and readings above about 60 percent relative humidity for long stretches suggest a problem worth checking.

A worked example

A 400 square foot crawlspace with visible growth, the leak fixed, no testing and no material removal: the calculator returns $3,200 to $13,000. The low end assumes easy access and light growth, the high end assumes heavy growth and tight access. A site visit narrows it. A 15 square foot bathroom patch with drywall removal comes out at the $500 floor to about $800.

When DIY may be reasonable

EPA guidance says that mold growth under about 10 square feet on a hard surface, with the moisture fixed, can often be handled by the homeowner with gloves, a mask and a damp cleaning method. It does not apply to mold from sewage or flood water, to growth inside ductwork, or to large areas. The calculator shows a note when your inputs fit the small-patch case.

Limitations of this calculator

Factors that move the number

Questions about mold removal cost

Related pages: mold removal, crawlspace water removal, water damage cost calculator.

Sources: Angi; This Old House; Fixr; EPA.