Musty, earthy, or damp smell
Visible black, green, white, or gray spots
Water stains or discoloration on walls, ceilings, or floors
Peeling, bubbling, or cracking paint or wallpaper
Warped, swollen, or soft wood, drywall, or baseboards
Frequent condensation on windows or cold surfaces
Recent or ongoing leaks, flooding, or water damage
Persistent dampness in basements, bathrooms, kitchens, or laundry areas
Mold growth around vents, windows, under sinks, or behind appliances
Allergy-like symptoms that improve when leaving the house
Increased coughing, sneezing, wheezing, or eye irritation indoors
Clusters of mold on fabrics, carpets, or stored items
Excess humidity indoors
Rusting, corrosion, or deterioration near plumbing or HVAC areas
A professional mold inspection or test confirming spores or growth