Mandeville sits on the Northshore about 30 miles north of downtown New Orleans, and Covington about 37 miles. NOLA Mold Remediation is a free quote service: describe the mold once and independent St. Tammany Parish companies can reply with quotes.
Get a Free Quote Call (504) 370-1142Both are in St. Tammany Parish, which has grown 5.5% since 2020 to 279,108 residents (Census Bureau 2025 estimate).
12,918 residents (Census Bureau 2025 estimate). Mandeville is directly across Lake Pontchartrain from New Orleans, linked by the Causeway, whose first span opened in 1956 and second in 1969. The blocks nearest the lake have flooded repeatedly during storm surges, despite a 5-foot seawall. Katrina flooded hundreds of buildings in 2005. In Ida (2021), the Mandeville gauge reached 7.1 feet above mean higher high water, with a high-water mark 7.6 feet above ground.
11,721 residents (Census Bureau 2025 estimate). Covington is the St. Tammany Parish seat, at the fork of the Bogue Falaya and the Tchefuncte River. Away from the lake, flooding here is more likely to come from the rivers and heavy rain. During Hurricane Francine on September 11, 2024, a gauge 4 miles north-northeast of Covington recorded 9.63 inches, the highest rainfall total in the National Weather Service report.
These are the newest housing markets on this site. The median Mandeville home was built in 1990 and the median Covington home in 1991 (American Community Survey 2020–2024). 20.3% of Covington homes went up in the 2010s alone.
Many newer, larger Northshore houses put the air handler and ductwork in the attic, and many are two-story. In houses like that, the common mold spots move upstairs:
Those are typical for homes of this age and style, not a local count.
68.1% of Mandeville homes and 69.7% of Covington homes are owner-occupied (ACS 2020–2024). After a storm, that usually means you are dealing with two insurers. Flood damage goes to your flood (NFIP) policy, and wind, roof and plumbing damage usually goes to your homeowners policy. Mold coverage depends on the cause and your policy's mold limits. Photograph everything before tear-out and talk to your adjuster before signing a remediation contract.
Louisiana requires a Mold Remediation license from the Louisiana State Licensing Board for Contractors (LSLBC) for mold remediation projects of about $7,500 and up (La. R.S. 37:2150.1). Before you sign, look up the company's license on the LSLBC website. HVAC and duct mold work runs $3,000 to $10,000 and attic work $1,000 to $4,000 in published national estimates (Fixr, Aug 2025; This Old House, Mar 2026), not quotes. See the cost guide.
Newer homes can still get attic mold. Common causes are a bath fan venting into the attic instead of outside, a sweating air handler or duct in a hot attic, a clogged AC drain pan, and roof or flashing leaks after a storm. Each needs a different fix, so ask the company to name the source before it quotes removal.
Elevation cuts flood losses, but it doesn't stop mold. Mandeville's building-elevation and floodplain rules sharply reduced repeat losses after Isaac and Ida. Mold can still come from roof leaks, AC condensation and plumbing, and the space under a raised floor can stay damp. Check those places after any storm.
Yes. Independent companies serving Covington take small and large jobs. For areas under about 10 square feet, EPA says homeowners can usually clean it themselves. For projects of about $7,500 and up, Louisiana requires a Mold Remediation license from the LSLBC, so check the company's license before you sign.
Across the Causeway, New Orleans is covered on the home page.
Tell us your ZIP, where the mold is (attic, ceiling, walls, under the house), roughly how big, and what you think caused it. Independent Northshore companies reply on their own schedules. They may pay to receive requests; you decide whether to hire.
Describe it once and independent mold companies serving New Orleans and the metro can reply with no-obligation quotes.
