Water Intrusion Repair Cost Calculator

Water intrusion creates four cost streams: source repair (roof, plumbing, window flashing), mold remediation, drywall replacement, and flooring replacement. Without timely repair, mold spreads behind walls and into HVAC, multiplying cost. This calculator builds a full repair budget with industry cost ranges and a 20% hidden-damage contingency.

Affected SF

Mold remediation $/SF

Drywall replacement SF

Drywall cost / SF

Flooring replacement SF

Flooring cost / SF

Leak source repair

Total water repair cost

$32,760

Mold remediation

$14,400

Drywall

$3,600

Flooring

$4,800

Leak source repair

$4,500

Contingency 20%

$5,460

How the math works

Water intrusion repair has four cost components: source repair (roof, plumbing, window flashing), mold remediation ($10-25/SF affected), drywall replacement ($4-7/SF), and flooring ($6-15/SF carpet; $10-25/SF tile/wood). 20% contingency for hidden damage is standard.

Mold remediation under 100 SF can be DIY; over 100 SF requires licensed remediation contractor (state-specific). Insurance typically covers source-event water damage but excludes ongoing seepage.

How to Use

Enter affected SF (mold and drying area).
Enter mold remediation $/SF, plus drywall and flooring SF and costs.
Enter leak source repair (the root-cause work).
Read total cost including 20% contingency.

Frequently Asked Questions

Insurance coverage?

Sudden, accidental water (burst pipe, storm) is usually covered. Long-term seepage and gradual deterioration are typically excluded — file early to get the loss classified correctly.