Why Is My Basement Carpet Smelling Like Cat Pee?
Last updated October 26, 2026
The short answer
Clean and Dry the Carpet
For a mild smell, you can try a homemade cleaner with white vinegar and water, then blot the area dry. Use a fan or a dehumidifier to pull moisture out of the room. Keep the air moving for at least a day to see if the odor fades.
If the smell persists after cleaning, the urine-like scent may come from mold growth in the padding. Mold can look like dark spots or a fuzzy layer under the carpet. In that case, cleaning the surface is not enough, and you will need to remove the affected carpet and padding.
- Blot spills immediately, do not rub them in
- Use a wet vacuum to remove excess water
- Run a dehumidifier for several days
- Lift the carpet edges to let air circulate
- Replace padding if it stays damp for more than 48 hours
Find the Water Source
The smell is a symptom, not the problem. Look for common basement water sources like a leaking water heater, a cracked foundation wall, or a clogged drain line. Also check the AC condensate pump, since a backup can spill water onto the floor.
If you live in Daytona Beach, the humid climate can make small moisture issues worse. Fixing the leak or improving drainage is the only way to stop the smell from coming back. Otherwise, the carpet will keep absorbing moisture and the odor will return.
When to Remove the Carpet
If the carpet padding is soaked, it usually cannot be saved. Padding is like a sponge, and once it holds moisture, it stays wet and starts to smell. You can cut out a small section to test it, but most often the whole area needs to go.
Removing water-damaged flooring is a messy job, but it is often the most reliable fix. You can pull up the carpet yourself or bring in local water damage pros to handle the removal and disposal. They can also check the concrete floor underneath for moisture.
Get a Professional Inspection
If you cannot find the source of the moisture, or if the smell covers a large area, a professional inspection can help. Water damage pros use moisture meters and thermal cameras to locate hidden damp spots in walls and floors. That can save you from guessing and replacing more than needed.
An inspection also helps you understand the full extent of the damage. The pros can tell you whether the carpet, padding, or subfloor needs to be replaced. They can also check for mold growth, which may require a mold professional if it has spread beyond the carpet.
- Ask the pros to check the subfloor for rot
- Request a written summary of moisture readings
- Ask about drying equipment like air movers
- Get advice on preventing future moisture problems
Talk to someone now
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (386) 272-5697Frequently asked questions
Can I just use bleach to get rid of the smell?
Bleach can kill surface mold, but it will not remove the odor from the padding. The ammonia smell comes from bacteria or mold deep in the material. Bleach also damages carpet fibers. Better to dry the area or replace the padding if it is wet.
Will the smell go away on its own?
Usually not. If the source of the moisture is not fixed, the smell will get worse over time. Even if the carpet dries out, the odor can remain in the backing. You need to remove the moisture source and clean or replace the affected materials.
Is cat pee smell dangerous to breathe?
In most cases, the smell is just an irritant, but it can indicate mold growth. Breathing in mold spores can cause allergy symptoms or respiratory issues. If you feel unwell, see a doctor. Also consider having a mold professional check the area if you suspect mold.