Persistent pet odor in carpets and upholstery — San Francisco, California

Pet urine, dander, and body oils can penetrate deep into carpet fibers, padding, and even the subfloor, creating persistent odors that regular vacuuming and surface cleaning cannot eliminate. The odor intensifies in humid conditions as bacteria break down uric acid crystals embedded in the carpet pad. Standard household carpet cleaners only address the surface — they cannot reach urine that has soaked through to the padding and subfloor beneath. A professional deep-cleaning service uses enzymatic treatments specifically designed to break down uric acid at the molecular level, combined with hot water extraction that reaches deep into the carpet backing and pad. For severe cases, the technician may need to pull back carpet sections, treat or replace the pad, and seal the subfloor with an odor-blocking primer before re-laying the carpet. Professional pet odor treatment costs $200–$500 per room, while full carpet replacement runs $800–$2,500 per room including padding and installation.