Flood damage in Nassau isn't just standing water — it's contaminated sediment, waterlogged materials, debris, and moisture that has penetrated every porous surface in its path. COS Water Damage Restoration's Nassau flood cleanup team is trained and equipped for the full scope of flood recovery: from the initial water pumping through debris removal, structural drying, antimicrobial treatment, and complete rebuild.
Flood cleanup in Nassau is a specialized discipline — not standard water damage restoration with a different name. The contamination profile, debris volume, and structural concerns that come with flood events require specific training, equipment, and protocols.
Flood water in Nassau is classified as Category 2 or Category 3 — containing contaminants from storm drains, agricultural runoff, or sewage intrusion. Our crew uses the correct containment, PPE, extraction equipment, and disposal procedures for contaminated water events — not standard water damage methods.
We're based in Nassau, not dispatched from a regional hub. That's what makes fast response possible.
You can't dry a space that still has saturated debris in it. Full cleanup is the prerequisite for effective structural drying.
Flat-rate pricing, in writing, before any equipment is deployed — that's the standard on every Nassau job.
Here's the full scope of what our Nassau Flood Damage Cleanup crew handles.
The first priority in any Nassau flood event is getting the water volume down as fast as possible — limiting additional saturation of structural materials and preventing the contaminated water from spreading further into the property. We deploy submersible pumps for deep standing water, then transition to truck-mounted extraction for residual volume, working until the visible water is completely removed before debris removal begins.
Incomplete debris removal under drying equipment is one of the most common sources of post-flood mold in Nassau properties.
Treatment is applied to framing, subfloor sheathing, concrete, and masonry before drying begins — not after.
Post-flood structural drying in Nassau is more complex than standard water damage drying because contaminated events often require partial material removal (wet drywall, insulation, flooring) to access structural assemblies for drying. Our Nassau drying crew deploys calibrated LGR dehumidifiers and air movers after material removal and antimicrobial treatment, taking daily moisture readings at fixed sensor points until all assemblies reach documented equilibrium moisture content targets.
Flood insurance claims — whether through NFIP or private carriers — have specific documentation requirements that differ from standard homeowner water damage claims. Our Nassau claim coordinators are familiar with flood-specific documentation standards, know which carriers cover flood damage in NY and what their adjusters require, and build your claim file to those standards from the first day on site.
One company from flood water to finished restoration. No handoffs, no coordination gap.


Call +1-844-499-0972 and a live Nassau dispatcher answers — not an automated queue. Your situation is assessed, the nearest Nassau flood crew is dispatched, and your estimated arrival is confirmed during the call.
Our Nassau crew arrives with pumping equipment, contamination PPE, extraction gear, and assessment tools configured for flood response — not standard water damage equipment. Target arrival in 60 minutes or less.
The full scope informs the estimate — no partial quotes that grow once work begins.
Written satisfaction guarantee. One crew, one scope, one invoice — matching the estimate you approved.



"Our Nassau restaurant flooded during a major storm event. COS Water Damage Restoration handled the flood cleanup with commercial-scale equipment, coordinated around our equipment and walk-in units to protect anything salvageable, and had us reopened four days sooner than any other company we got quotes from. The insurance documentation they prepared was detailed enough that our adjuster approved the scope on the first submission. Outstanding."
"The antimicrobial treatment step was what convinced me that COS Water Damage Restoration knew what they were doing. After flood water, every company I talked to mentioned drying — but only COS Water Damage Restoration specifically walked me through the contamination treatment that happens before drying starts. That's the step that prevents mold, and they didn't skip it to save time or money. Our Nassau home came out of the restoration clean and structurally sound."
"The estimate conversation before any work started was exactly what I needed. After a flood you feel powerless — the written pricing discussion gave me back a sense of control. I knew what was happening, why, and what it would cost before anything began. COS Water Damage Restoration's Nassau team was professional from the first phone call to the final walkthrough."
COS Water Damage Restoration's Nassau flood cleanup team serves Nassau and surrounding communities throughout NY. Call +1-844-499-0972 to confirm same-day coverage at your address.
Storm flooding doesn't clean itself up and it doesn't improve with time. Call +1-844-499-0972 and our Nassau flood cleanup crew is on the way — typically within 60 minutes.
📞 Call +1-844-499-0972 — Nassau Flood Response24/7 Dispatch · IICRC Certified · Contamination Protocols · Nassau, NY