Where mold grows, and what each spot costs

Every location has its own moisture story and its own price band. Tap a marker or pick from the list.

Cross-section of a house showing where mold grows A two-story house with a basement and a single-story wing over a crawl space. Numbered markers point to the attic, bathroom, wall cavities, windows, HVAC unit, basement, crawl space, and a flooded room. 1 2 3 4 5 6 7 8
  1. 1 Attic
  2. 2 Bathroom
  3. 3 Behind walls
  4. 4 Windows
  5. 5 HVAC
  6. 6 Basement
  7. 7 Crawl space
  8. 8 After flooding

$1,000 to $4,000

Attic mold

Roof leaks, bath fans that vent into the attic, and winter condensation on cold sheathing.

$500 to $4,000

Basement mold

Foundation seepage, high humidity, and finished walls that trap moisture against block.

$500 to $2,000

Crawl space mold

Open vents in humid climates, bare dirt floors, and plumbing leaks nobody sees.

$500 to $1,500

Bathroom mold

Grout and caulk growth from steam, and hidden rot behind tub surrounds.

$3,000 to $10,000

HVAC and duct mold

Wet evaporator coils, drain pans, and ducts that spread spores through every room.

$800 to $7,000

Black mold

Stachybotrys on wet drywall and paper after a leak that ran for days or weeks.

$1,200 to $3,800

Mold after flooding

Standing water, Category 3 contamination, and the 24 to 48 hour window before growth starts.

$1,000 to $12,000

Mold behind walls

Hidden growth from plumbing leaks and window flashing, found by smell before sight.

$500 to $1,500

Mold around windows

Condensation on cold glass, failed flashing, and sills that stay wet all winter.

$500 to $1,500

Mold in closets and storage

Still air against an exterior wall, cardboard, and clothing that holds humidity.

See your number before anyone calls

Seven questions, a planning band from published 2026 data, then one remediation company if you want it.

Get my estimate