Professional treatment can improve many pet-odor situations, but the visible spot may be only a small part of the contamination path.
Surface versus subsurface contamination
Urine can pass through carpet into pad or subfloor and can move into upholstery cushion fill. Surface cleaning alone may not reach those layers.
Why honest inspection matters
A useful estimate considers the number of areas, age of contamination, material construction and products already applied.
When replacement may be needed
Severe repeat contamination can require pad replacement, subfloor sealing or disposal of damaged cushion material.