The negative impacts on the marketability of residential properties caused by odors from pet dander, feces, and urine can be significant factors in the price a buyer is willing to pay.
For example: I had an assignment to appraise a 3,500 sq. ft. four-year-old masonry house of well above average quality construction. It was unoccupied so I used my MLS Lockbox key for access.
Upon entry, I noticed an intense odor from animal waste,