That distinctive odor can be an indication of a mold problem. Certain types of mold have a smell similar to cat urine, including dangerous toxic black mold, which should be remediated by a professional. Another source of cat urine odor is ornamental boxwood, a common landscaping shrub.

Why does mold smell like urine?

Mycotoxins typically produce rather pungent odors that range from everyday odors that are out of place to nearly indescribable odors. For example, stachybotrus which produces trichothecene has been described as smelling like cat urine. I personally got a whiff of cat urine in my moldy home from time to time.

What makes my house smell like pee?

If your house smells like urine, and you've taught your young sons to aim into the toilet, not around it, you might have a pest problem, a plumbing problem, or a mold problem. Malfunctioning electrical wires might also cause a urine-like odor.