Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

How to Get Rid of Cat Urine Smell in a Basement: 4 Simple Steps

basement of an Old style townhouse

Cat pee has an odor like no other. So, if your basement smells like cat pee, you’ll want to address it as soon as possible. Although we love our cats, dealing with their urine can be a frustrating experience. If you don’t clean it up immediately, the odor can linger and permeate all the surrounding surfaces.

Many cat owners end up with a basement that smells like cat pee when the litter box is kept down there. Whether you have a concrete floor or a finished basement with carpeting, tile, or other flooring, the odor can quickly become overwhelming. Here are the steps for how to get rid of cat urine smell in a basement and keep it from becoming a problem in the future.

divider 1 paws

Supplies You’ll Need

  • Ultraviolet light
  • Mop and bucket with cleaning solution (hard floors)
  • Shampooer (carpeting)
  • Enzymatic cleaner
  • White vinegar
  • Baking soda
  • Dish detergent
  • Hydrogen peroxide

Our Favorite Enzyme Cleaner 

The Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray is our favorite all-purpose enzyme cleaner. It kills harmful bacteria and permanently removes even the worst kitty stains and smells, leaving your home fresh and clean! Click here to learn more about this amazing product and get yourself a bottle.

Image Product Details
Best Enzyme Spray
Winner
Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray
  • All-purpose
  • Pet-safe
  • Multi-surface safe
  • At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding products of this cool cat company!

    divider 2 cats

    The 4 Steps to Get Rid of Cat Pee Smell in a Basement

    1. Find the Urine Spots

    If you don’t catch a cat urine stain immediately, it can be more difficult to find the spots and effectively remove the smell. Invest in an ultraviolet (UV) light that can highlight urine stains and show you where to clean. You can find UV lights cheap in hardware stores, department stores, and online.

    Turn out the lights, and run the UV light close to the floor. Any cat urine stains will light up in a bright white or purple, giving you a good idea of the stain’s location and shape. Use chalk or tape to mark the area around the stain so you can see it when the lights are on.

    urine spot on the carpet as seen using UV light
    Image Credit: In The Light Photography, Shutterstock

    2. Clean the Floor

    Before you can tackle the stains themselves, you’ll need to clean the whole floor. For concrete, tile, or hardwood flooring, use a mop and soap and water to clean any residue off the floor. For carpeting, you may want to rent a carpet shampooer to get the carpet thoroughly cleaned first, but keep in mind that you may need to wait a day or two for it to dry.


    3. Address Fresh Urine Stains

    If you witnessed your cat peeing on the floor or know that the urine is fresh, you can clean it with a paper towel or cloth. Don’t rub, which can push urine deeper into the floor. Once the excess is mopped up, you can use an ion-based or enzymatic cleaner designed for pet stains. These cleaners are specially formulated to treat pet stains—not just for the odor that humans can smell, but for the odors that cats and dogs can smell that attract them to the same spot repeatedly.

    mopping a wooden floor
    Image Credit: Michal Jarmoluk, Pixabay

    4. Treat Old Urine Stains

    Older urine stains are more difficult to treat and can contribute to why your basement smells like cat pee. With a hard, porous surface like concrete, the stain can settle into the material and last for years but become strong when it gets wet. On carpeting, the urine can settle into the fibers and beneath, making it more difficult to clean and remove effectively.

    For old stains, you may need to use a combination of products to remove the smell completely. White vinegar, hydrogen peroxide, and an enzymatic cleaner can be effective.

    Here are the mixtures:
    • White vinegar and water: Combine two parts white vinegar with one part hot water, and pour it onto the stain to soak.
    • Hydrogen peroxide: Mix 2 cups of hydrogen peroxide with 2 teaspoons of baking soda and a drop or two of dish detergent. Pour the mixture onto the stain to soak.

    You can use either of these mixtures to treat the urine stain and let them dry. Once that’s complete, spray the stain with the enzymatic cleaner to break down the uric acid. Allow the treatment to sit for 24 hours. If any smell remains after the spot is dry, treat it again with the enzymatic cleaner.

    divider 3 paws

    Why Is My Cat Peeing Outside of the Litter Box?

    Cats usually take to litter box training quickly. Accidents happen, but if your cat is peeing outside of the litter box constantly, it could indicate a problem. Most litter box issues can be treated to prevent urine stains in the future.

    alert cat near two litter boxes
    Image Credit: victorhugosilvafotograf, Shutterstock

    Here Are Possible Reasons for Accidents

    • Medical problems: Some medical conditions can cause inappropriate urination, such as a urinary tract infection, kidney disease, or diabetes. Discuss your concerns with your vet and rule out these common medical causes.
    • Dirty litter box: Like people, cats prefer a clean area for their bathroom habits. If you’re not being as diligent as you should be with litter box cleaning, your cat may choose to go elsewhere. Keep up with your litter box cleaning at least once a day (multiple times a day for multi-cat households), and change out the litter completely every week or two. Clean your litter box with an enzyme cleaner to keep odors from sticking to the sides.
    • Litter box location: If the litter box isn’t easy for your cat to access or is located in an unfavorable area, your cat may be inclined to find other areas to pee. Litter boxes should be out of high-traffic areas, but not so secluded that your cat feels vulnerable or threatened while trying to use them. Keep in mind that areas with a lot of strange sounds, such as near the washer and dryer, or in tight spots like a hallway or confined room, may be scary to your cat. Consider moving the litter box to a different spot to see if it fixes the problem.
    • Litter type: Cats can be particular about the type of litter they’ll use. They feel the litter on their feet and are sensitive to the sensation, so your litter box issue may be caused by the type of litter you’re using. Try a few different types of litter to find the one your cat prefers. If possible, set up multiple identical litter boxes with different litter.
    • Multi-cat households: Peeing outside the litter box could be the result of conflict in multi-cat households. Some cats can be bullies and may force another cat out of the litter box, causing inappropriate urination. If you have a timid cat or a cat that’s bullied by others, look for a different spot to keep their litter box. You should also avoid covered litter boxes in multi-cat households since they can “trap” a cat in a fearful situation with a bully cat.
    • Stress and anxiety: Cats are sensitive to environmental changes. Something as simple as moving the litter box to another spot in the house can trigger stress. When this happens, your cat may pee outside the litter box to relieve their anxiety with a familiar smell. If you suspect this is the cause, try to determine the change that triggered the stress, and do what you can to minimize it.

    If you are concerned about the health and well-being of your cat, seek veterinary advice for the best course of action.

    If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

    PangoVet_Mention-in-Content for PangoVet2 save money

    divider 3 paws

    Get Rid of Urine Smells for Good

    These steps to remove cat urine stains from your basement are effective for both new and old stains. Preventing inappropriate urination by treating its underlying causes is much easier than addressing old, set-in stains, so keep an eye on changes in your cat’s behavior, and take them for a checkup to rule out medical causes.

    Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray
    • ADVANCED ENZYMATIC CLEANER - Penetrates the most stubborn smells and stains at the deepest molecular...
    • FOR ANY MESS, ON ANY SURFACE - This pet odor eliminator cleans your carpets, floors, furniture,...
    • FRESH, NATURAL ODOR - Our unique formulation doesn't rely on dangerous or unpleasant chemical...

    At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding products of this cool cat company!


    Featured Image Credit: Anatoli Igolkin, Shutterstock

    Want content like this delivered to you?

    Sign Up For Our Newsletter

    News, insights, expert advice, and everything cat

    * By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

    How useful was this post?

    Click on a star to rate (you can leave written feedback after clicking submit)

    Help us improve Catster for pet parents!

    Your feedback really matters.

    What did you like about this post? Also how can we improve it?

    Join the conversation

    Leave a Reply

    You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

    Talk With A Vet Online

    Peace of mind,
    anywhere, anytime

    Affordable vet advice

    6 Weird Things Cats Eat: Vet-Reviewed Safety Tips & Considerations

    It’s normal for cats to eat weird and wonderful things, but just because it would be weird—and gross—for us to consume doesn’t mean...

    Ojos Azules Cat Breed: Info, Pictures, Temperament & More

    The Ojos Azules Cat is an extremely rare and possibly extinct breed that has deep blue eyes and a friendly personality. If you...

    Are Ragdoll Cats Affectionate? The Surprising Answer!

    Ragdoll cats are beautiful and intriguing. Their intelligence and docile behavior make them the perfect pet for those looking to maintain a calm...

    What Shots Do Kittens Need? Vet-Reviewed Schedule, Facts & FAQ

    Kittens need several vaccinations to protect them from infectious diseases. All kittens are susceptible to these diseases, no matter what their breed is....

    More related

    How Much Do Turkish Angora Cost In 2025? Complete Price Guide

    The Turkish Angora is one of the sweetest and most beautiful breeds in the cat world. These playful, affectionate cats are a favorite...

    Applehead vs. Wedgehead Siamese: Key Differences (With Info & Pictures)

    Siamese cats are one of the most popular and recognizable cat breeds, with their pointed coats, unique vocalizations, and deep blue eyes. The...

    Can a Cat Predict the Weather? Facts & FAQ

    Throughout history, there have been various strange beliefs about cats, including the idea that cats can predict the weather. Many ancient cultures had...

    Truly Free Cleaning Products Review 2025: A Detailed Look

    Our pets often make messes which require more than water to clean. But most cleaning products contain chemicals that leave harmful toxins around...

    Keep reading

    Can Cats Eat Quinoa? Vet-Reviewed Facts to Know

    Quinoa has become known as a superfood for humans. We can add it to just about anything to enhance the texture and nutrients within a meal. However, can our feline friends enjoy this food too? Yes, cats can safely eat...

    Can Cats Eat Quinoa

    Why Do Cats Pee When Scared? 2 Reasons for This Behavior

    If you’re a cat owner, chances are that you don’t see your cat pee anywhere but the litter box. Sometimes, though, you may notice that cat urine is on the floor or the couch, and your cat is nowhere to...

    Cat Owner Hold Cat Car Scared

    Do Feral Cats Know How to Purr? Vet-Approved Facts & FAQ

    Hearing your cat purr is usually a sign you’re doing something right. Whether they have a full belly and are thanking you, or they are simply enjoying the affection you’re providing, their contentment is heartwarming. But have you ever wondered...

    Stray cats eating on the street

    Why Is My Cat Peeing in the Laundry Basket? 8 Vet-Reviewed Reasons

    When your cat pees somewhere they’re not supposed to, it can be both distressing and completely baffling. Rest assured that your cat is not doing this out of spite or to annoy you. Peeing anywhere outside the litter box can...

    cat in laundry basket

    Why Are My Cat’s Ears Cold? Vet-Approved Facts & Warning Signs

    Cats savor sunlight. Their bodies radiate warmth, and most of them greatly dislike cold weather. Similar to our reptilian friends, felines tolerate temperatures around 60ºF to 70ºF but really thrive in the 86ºF to 100ºF zone. Even so, it isn’t...

    close up cat ears pinna

    Can Young Cats Develop Diabetes? Our Vet Explains Signs, Treatment & FAQ

    Diabetes is a complex metabolism condition affecting many animals, including cats. With estimates reaching 1% of the cat population 1, it’s easy to wonder if your cat could be at risk for developing the disease. While older cats seem to...

    vet holding sick cat

    Is Borax Safe for Cats? Vet-Approved Safety and Usage Advice

    Borax is a multipurpose cleaner that can be used for stopping an infestation of ants or cleaning mold. It’s even become popular as an ingredient for homemade slime recipes! You might also see it being suggested as a “natural” alternative...

    Catster_Is Borax Safe for Cats

    How to Manage Cat Separation Anxiety: 8 Vet-Approved Tips

    Although separation anxiety is often associated with dogs, it’s also a problem that can occur in cats. Knowing how to deal with separation anxiety in cats can be difficult, and it can become frustrating to manage this issue. To help...

    lonely cat sits on a bed and sadly looks at the window