Severe Urine Odor Removal in Los Angeles County
Structural odor remediation for LA County homes. We remove contaminated materials, dry the structure, and seal framing, subfloor, and concrete with our Odor Encapsulation System.
Most homes we see in LA County have already been cleaned, enzyme-treated, ozoned, repainted, re-floored, or fully remodeled. The smell came back because the contamination is in the structure. Surface treatments don’t reach it. We remove what’s contaminated, dry what’s wet, and seal what’s left. 30+ years. 5-year guarantee on every treated area.
Call 877-386-3677 for a phone consultation or to schedule an inspection.
We Start Where Carpet Cleaners Stop — And We Do What Ozone and Enzymes Can't
We’re not carpet cleaners. We’re not a janitorial service. We’re not a deodorizing company.
We remove urine contamination from the structure of the home — subfloors, concrete slabs, drywall, framing, baseboards, wall cavities. No ozone, no hydroxyl generators, no chlorine dioxide gas. Inspections are strictly for urine odor damage. Written reports are available for real estate transactions, tenant and landlord disputes, and move-in/move-out documentation.
Three Levels of Urine Odor Damage
Moderate
Drywall removal 2–4 feet high. Carpet, pad, tack strip out. Subfloor or concrete sanded and sealed. Baseboards, selected door jambs, affected cabinets removed. Most moderate jobs finish in under a week.
Severe
Drywall removal 4–8 feet high. Sometimes a partial-to-full gut without the ceiling. Full dry-out with air movers and dehumidifiers. Multi-coat Odor Encapsulation System on studs, sill plate, subfloor, and concrete. This is most of the work we do.
Extreme
Total gut including ceilings. Windows out. All flooring out. Floors, walls, framing, and roof structure exposed and treated. 1–3 weeks depending on size and conditions. These are the worst cases: 10+ year multi-pet, severe hoarding, failed remodels where every previous attempt has to come out.
If your situation is a fresh isolated stain, that’s a job for a skilled carpet cleaner. Not us.
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Cases We're Called To
- Whole house smells like urine, noticeable at the front door
- Bought a recently remodeled home and started smelling cat urine after move-in
- Tenant lived in the unit for 10 years with multiple cats — unit is ruined
- Seller owned dogs, the realtor said all that was needed was new carpet and bleaching the concrete
- Buyer pulled the carpet, sealed the subfloor with shellac, installed laminate — fine for two weeks, then everything had to come out
- Remodeled house still smells, no pets in the home now
- Cat spraying walls and baseboards 12″ to 7′ high — usually means drywall contamination
- Dog urine soaked through carpet into plywood — see subfloor odor sealing
- Urine in garage concrete, patio, or interior slab — see concrete odor sealing
- Litter box in a closet or laundry room missing for years
- Smell discovered after closing — see urine damage in a house for sale
- Landlord or property manager turning a unit after dog urine or cat urine damage
- Hoarder situation requiring full-home remediation
- Rodent contamination in attic insulation or crawl space framing
- Cockroach infestation layered with pet odor
- Pet feces soaked into carpet, pad, subfloor
- Flooring installer from a national home improvement center refused to install because of the smell
- Tried everything, nothing works
A few real LA County jobs:
Monrovia. Seller spent $30,000 remodeling a townhouse — new flooring, new cabinets, fresh paint. Buyer’s inspection caught the smell before close. Seller brought us in. We did the remediation, his contractor did the rebuild separately. Original buyer walked. Seller resold odor-free, spent another $25,000 on the rebuild. If he’d called us first, he wouldn’t have spent the first $30,000.
Lakewood. Buyer closed on a freshly remodeled house — new kitchen, bathrooms, flooring, paint. Smelled cat urine within days of moving in. No pets in the home. UV light showed nothing on the surface — every visible material was new. The odor was coming from the subfloor and concrete underneath the new flooring. None of it had been treated.
Van Nuys. Owner used 100 gallons of a popular enzyme product on a contaminated slab. Told us it came with a guarantee. We showed him the fine print: one gallon returned per address. The slab still smelled. We removed the flooring, sanded the concrete, applied the Odor Encapsulation System. Fixed.
San Fernando Valley rental. Tenant lived there 7–8 years with cats. Owner hired a handyman to prep for sale. Handyman painted the subfloor with a popular primer, multiple coats. Every visit, the handyman told the owner “it’s much better.” The owner’s wife came in separately and said she could still smell urine. The daughter agreed. That’s when we got the call. Three days — dried, sanded, sealed.
The damage we handle is rare enough that most owners only need us once. Realtors and property managers can go entire careers without seeing this, until they do. Someone refers them to us.
Why Urine Odor Problems Vary Across LA County
LA County: 10 million residents, 88 cities, 4,000+ square miles. Housing runs from 1910s Craftsmans in Pasadena to 2020s slab townhomes in Porter Ranch. One of the densest pet populations in the country — household pets, rescue overflow, foster placements, home-based pet daycares, kennels, breeders, retirement homes where elderly residents have incontinence issues. Severe contamination shows up in every housing type the county has.
It’s different in every structure. A 1920s raised-foundation home in Long Beach doesn’t fail the same way as a 1960s slab tract in Lakewood or a mid-rise condo in Koreatown.
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Housing Types in LA County
Raised foundations with wood subfloors. Pasadena, Altadena foothills, South Pasadena, Highland Park, Eagle Rock, Echo Park, older Glendale, Burbank, Whittier, San Pedro, older Long Beach, older Alhambra and Monterey Park. Most 1910s–1940s LA city housing. Some have original Douglas fir, oak, or 1×6 plank subfloor. A few have tongue-and-groove 2×8 subfloors that can be saved. Many have been layered: original hardwood, then carpet, then exposed again, then laminate or LVP. Urine wicks through carpet, pad, and subfloor planks. It drips onto joists and off-gasses up through the crawl space.
Concrete slab construction. Lakewood, Bellflower, Cerritos, Norwalk, Downey, Pico Rivera. Most of the San Fernando Valley — Van Nuys, Reseda, Northridge, Chatsworth, Woodland Hills, Tarzana, Encino, North Hollywood, Sun Valley, Pacoima, Sylmar. South Bay — Torrance, Gardena, Lawndale, Hawthorne, El Segundo. Newer tracts in Santa Clarita, Valencia, Stevenson Ranch, Palmdale, Lancaster. A lot of these originally had carpet directly over concrete, drywall sitting on the slab. Urine penetrates the surface, wicks into cracks and cold joints, saturates the slab edge at the wall base. Replacing flooring doesn’t remove it.
Multifamily — condos, townhomes, mid-rises, mixed-use. Downtown LA, Koreatown, Hollywood, West Hollywood, Miracle Mile, downtown Glendale, downtown Long Beach, Santa Monica, Culver City, newer Inglewood infill. Some high-rises have a lightweight concrete or mortar topping 2–3 inches thick over the structural subfloor. In severe cases that topping gets so saturated it has to come out — not the structural slab, just the contaminated topping. We get calls from owners facing eviction threats, HOA fines, and city nuisance-odor ordinances when the smell reaches neighbors through shared walls.
Hillside and canyon construction. Sherman Oaks hillsides, Studio City, Hollywood Hills, La Cañada Flintridge, Altadena foothills, Malibu canyons, Palos Verdes-adjacent slopes. Split-level and post-and-beam framing lets contamination travel through wall cavities into rooms nowhere near the source. We also get calls about rodent urine and droppings from inside walls, attics, and under kitchen cabinets. One side of the house bakes in afternoon sun, the other stays shaded. Odor cycles with the temperature shift.
High desert. Lancaster, Palmdale, Quartz Hill, outlying Antelope Valley. Newer slabs, stucco-over-frame, older manufactured homes. The dry climate actually holds odor in check more than coastal or valley areas. Summer AC pulls moisture out and sends it down the condensation line. When winter heat runs, the odor gets noticeable again. We routinely see visible urine crystals on the carpet backing and wood floors when we pull them up.
Climate and Urine Odor in LA County
Coastal — Long Beach, San Pedro, Palos Verdes-adjacent, Redondo Beach, Hermosa Beach, Manhattan Beach, El Segundo, Santa Monica, Venice-adjacent, Malibu. These areas hardly ever dry. We’ve measured moisture over 60% RH in carpet pad five years after the pet was gone. Carpet fiber dries, but the pad acts like a diaper between subfloor and carpet backing. Whatever doesn’t soak into the subfloor or concrete wicks back into the carpet fiber as it dries. Clean the carpet again, the cycle starts over.
Inland valleys and basins — San Fernando Valley, San Gabriel Valley (Alhambra, San Gabriel, Monterey Park, Arcadia, Monrovia, Azusa, Covina, West Covina, La Verne, San Dimas, Diamond Bar, Pomona), Glendale, Burbank. Spring rain raises indoor humidity, and urine salts absorb the moisture. Summer heat hits, the AC kicks on, and the AC acts as a dehumidifier — pulling moisture out of carpet, drywall, and baseboards and carrying odor with it. That’s why owners say “it’s worse in summer” or “worse when the AC runs.”
Antelope Valley — Lancaster, Palmdale. More slab homes, newer construction, two-story homes. Too hot outside to keep pets outdoors, so multi-pet households are common. Dryness masks odor for long stretches until the seasons turn.
How Moisture Moves in a Contaminated Home
Moisture readings above 15% RH are a signal to investigate — not proof of urine. Moisture can come from urine, cleaning products, pressure washing, or unrelated leaks. Two real examples:
Pressure-washed slab. Owner had all the flooring removed and a previous contractor pressure-washed the concrete. We arrived to high moisture readings on baseboards and lower drywall. Pulled the baseboards. No urine odor coming off them. The moisture was wash water, not urine. No structural remediation needed on those walls.
Cat on carpet, no wall spraying. Owners said the cat never sprayed — used the carpet only. We got moisture readings 3, 6, and 12 inches up the drywall. The urine wicked up the drywall from the slab joint because the baseboards were installed too high above the carpet to absorb it, and the drywall sat directly on concrete. The wicking path was the tell. That wall needed treatment.
Cleaning is often part of the problem, not the solution. It has to get dry. Urine salts in saturated materials absorb any new moisture, and repeated enzyme use and carpet cleaning keep the site wet for years. We’ve measured 98% RH on drywall, hardwood, and subfloor. Joists, subfloor, and sill plate all need attention in those cases.
Why Cleaning, Enzymes, Ozone, and New Flooring Fail on Severe Urine Odor
These products are built for incidental accidents and surface maintenance. They work fine in that context. The problem is when they’re sold as solutions for severe structural contamination. Before calling anyone for severe odor, ask for a guarantee — and read the fine print.
- Carpet cleaning. Skilled carpet cleaners with soak-treatment technique, pad replacement, and subfloor awareness can handle moderate cases. Most basic carpet cleaning treats fiber only. Nothing deeper. Over-wetting forces urine deeper into pad, subfloor, and drywall — spreading it instead of removing it. Carpet pad acts as a diaper and holds contamination until something forces it out. For severe cases, carpet comes up, pad and tack strip come out, subfloor gets treated.
Enzymes. Good for fresh accidents on carpet, upholstery, fabric. On saturated concrete or plywood, they sit on the surface — the capillaries are already full. Concrete looks like a sponge under a microscope. When those capillaries are full of urine, more liquid stays on top. As the surface dries, the urine inside wicks back up. We’ve been called out after clients used 20, 50, even 100 gallons on one address. Same smell or worse.
Ozone. Works on airborne molecules — smoke, garlic, mildew, cigarettes. Doesn’t penetrate solid materials. Urine goes on wet and soaks below the surface before ozone reaches it. Concrete and wood are porous. Even granite is porous. Laminate and LVP are water-resistant on the face but the joints aren’t — liquid runs right between the planks into the subfloor. Ozone minimizes air odor while it runs. Turn it off, the smell comes back.
Paint and new flooring. The most common cosmetic concealment we see, especially on flips. Laminate or LVP installed over an untreated, contaminated subfloor. Sometimes the perimeter edges are caulked, trying to seal the odor in. LVP is sold as waterproof. We routinely remove LVP where urine has stained the back of the planks and the concrete underneath. Paint and new flooring trap the contamination. It keeps emitting through the new materials for months, sometimes years.
Structural remediation addresses the source layer — subfloor, slab, drywall, framing, studs, sill plate, joists, attic, crawl space. Cats also damage window frames and the tops of upper kitchen cabinets — they jump counter-to-fridge-to-cabinet-top and use the cabinet top as a litter box. We’ve removed upper cabinets for that exact reason. That’s the only approach that produces a permanent result.
Signs a Home's Odor Has Been Covered Up
Walk into a property and watch for these together:
- Strong fragrance or multiple active diffusers, especially in rooms that don’t normally have them
- Fresh paint with a lingering odor still detectable underneath
- New LVP or laminate installed recently with caulk visible around the perimeter edge
- Fresh baseboards installed slightly higher off the floor than normal
- Fluorescent stains under UV light with a fragrance odor — the site was cleaned, not treated
- Long-time occupants or contractors saying “it’s much better now” while fresh visitors still smell something
Long-term exposure dulls the human sense of smell. Contractors, cleaners, and homeowners who’ve spent days or weeks in a house lose their reference point. A fresh nose catches what they can’t. Buyers catch what sellers miss. Family members catch what contractors miss. Trust the fresh nose.
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What We Remove, What We Treat, and What We Seal
We remove: carpet, pad, tack strip, baseboards, case molding, door jambs, urine-damaged cabinets and doors, contaminated window frames, plaster or drywall (2–4 feet on moderate jobs, 4–8 feet on severe, full walls and ceilings on extreme), laminate, LVP, floating hardwood, vinyl composite tile, lightweight concrete topping (2–3 inches, never structural slab), and contaminated insulation. Bagged and hauled in our trucks.
We dry: subfloors, concrete slabs, wall studs, sill plate, floor joists, exposed framing — air movers and dehumidifiers. Same equipment as flood restoration. If the moisture isn’t gone, the odor doesn’t leave.
We pre-seal with closed-cell foam: gaps and cracks between studs, joists, and around plumbing and electrical penetrations. Closes off odor pathways inside the wall cavity.
We treat and seal with the Odor Encapsulation System: studs where drywall had direct urine contact, sill plate, joists, subfloor, and concrete. 1, 2, or 3 coats depending on severity and what’s getting installed next. If no flooring is going down, the Odor Encapsulator can be sanded smooth and topped with a satin or high-gloss finish. Hardwood included when requested. Saved hardwood planks and tile grout get soak-treatment or sand-and-seal depending on condition.
Property types: single-family, condos, townhomes, apartments, duplexes, fourplexes, manufactured homes, historic prewar, hillside, luxury estates, investor flips, rentals, property management portfolios, short-term and vacation rentals, inherited and estate properties. Plus garages, crawl spaces, attics, ADUs, guest houses, laundry rooms, and closet litter box areas.
Our Inspection Process
Inspections are strictly for urine odor damage, not general home inspections. The founder is a certified home inspector, but on these visits our scope is odor damage only.
Inspections are normally non-destructive because most clients don’t own the home being inspected — they’re buyers, heirs, agents, tenants, or property managers.
- Initial walk-through. Room-by-room. What’s installed, what’s been replaced, what’s recently painted or renovated. Odor noted with the building closed up.
- UV black light. Urine fluoresces under UV. We map staining on drywall, baseboards, case molding, door jambs, cabinets, window frames, backsplashes, blinds, drapes. Cat spray usually runs 12 inches to 7 feet high.
- Moisture detection. Pin and pinless meters. Industry standard is under 15% RH. Above that is a signal to investigate — could be urine, cleaning products, wash water, or something else. Thermal imaging available for severe cases.
- Minor non-destructive exploration. Pulling carpet back at corners just enough to reveal tack strip, pad, and subfloor for moisture and odor checks, then laid back.
- Destructive testing when authorized. Removing baseboards, case molding, door jambs, LVP sections, or selected drywall to confirm what’s in the wall cavity or under the flooring. Prearranged with the property owner only, because we don’t reinstall what we remove.
- Forensic inspection. Separate scope for clients in litigation or formal disputes. Evidence is collected and retained — urine-damaged baseboards, drywall, carpet samples, tack strip, photo documentation. Documentation continues through the remediation job itself.
- Written report and itemized estimate.
Our Remediation Process
- Material removal — carpet, pad, tack strip, baseboards, case molding, door jambs, drywall, cabinets, insulation, flooring layers. Bagged and hauled.
- Dry-out — air movers and dehumidifiers run until moisture readings drop below industry standard. Days, not hours.
- Closed-cell foam pre-seal — gaps and penetrations in framing closed.
- Surface prep — concrete sanded with 25-grit prep tools. Subfloor and exposed framing sanded and cleaned. Residual primer, paint, or shellac from prior attempts removed.
- Odor Encapsulation System — 1 to 3 coats depending on severity and what’s being installed. Studs, sill plate, joists, subfloor, concrete.
- Final walk-through with the client before anything closes back up. No perfume. No deodorizer. A structure ready to be rebuilt.
- Written report and 5-year guarantee in writing on the inspection report and the invoice.
Rebuild is not part of our scope. Your contractor, handyman, or flooring installer takes it from there.
The 5-Year Guarantee
Every area treated with our Odor Encapsulation System is covered for 5 years. If odor returns in a treated area, we come back and retreat it at no charge. The guarantee is documented on the inspection report and the invoice, so you don’t have to look for it.
The California Sellers' Questionnaire
In California, sellers are required to complete a questionnaire that includes specific disclosure questions about pets, pests, urine, feces, and odor. Buyers should read it carefully. We’ve seen disclosures that clearly state the home had dog or cat urine, that carpet was replaced, and that walls were painted — and the buyer closed anyway without follow-up questions. Once escrow closes, recourse is limited.
If the disclosure says “no” and the home still smells, that’s the scenario where a forensic inspection matters. We find what was hidden or covered up.
We’re publishing a sample Sellers’ Questionnaire you can download and adapt — link coming soon — for California residents and for owners in other states using it as a reference.
A home inspector’s scope is to check the mechanical functions of the home. Odor doesn’t prevent anything in the home from functioning, so it’s not part of a standard inspection. If your home inspector flagged odor, that was a courtesy. A separate urine odor inspection is required.
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Who Calls Us in LA County
- Homeowners who’ve lived with the problem long enough to accept that cleaning isn’t going to fix it
- Sellers and real estate agents preparing listings in Pasadena, Manhattan Beach, Beverly Hills, Calabasas, Santa Monica, and across the county — see urine damage in a house for sale
- Buyers who discovered contamination after closing
- Landlords and property managers turning units in Koreatown, Inglewood, Glendale, Long Beach, and across the San Fernando Valley. We’ve seen rental units sit vacant for months — sometimes years — because the owner couldn’t get rid of the odor. Most we remediate in under a week
- Investors and flippers in the Gateway Cities (South Gate, Huntington Park, Lynwood, Downey, Bellflower, Compton, Pico Rivera, Montebello, Whittier) and the San Fernando Valley. Many find us after a remodel they already paid for didn’t solve the problem
- Estate executors and families clearing inherited homes in Arcadia, Alhambra, Monterey Park, Torrance, and older Long Beach
- Condo owners in DTLA, Koreatown, Hollywood, and Long Beach dealing with HOA complaints, eviction threats, or city nuisance-odor ordinances
- GCs, contractors, and handymen whose client needs remediation done before rebuild can proceed
- Agents, escrow coordinators, flooring installers referring clients when something gets flagged mid-transaction
Call Before You Spend Another Dollar on Flooring or Paint
If the smell came back after cleaning, a remodel, or new flooring, surface work won’t solve it. If you’re about to close on a house and you can smell something under the fragrance, don’t wait until you move in. If a flooring installer refused to install in your property, that’s the reason the smell keeps coming back.
We’ll tell you what’s in the structure, what it takes to remove, and what the scope looks like. Inspections are paid and produce a written report you can use for real estate, landlord-tenant, or litigation purposes.
877-386-3677 — serving all of Los Angeles County.
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FAQ
Carpet cleaning treats fiber. In severe cases, urine has soaked through the pad into the subfloor, concrete, or wall cavities. Those layers keep off-gassing into the room air. Adding moisture through repeated cleaning keeps the site wet and harder to dry. Cleaning is often part of the problem. The structure has to get dry, and the contaminated materials have to come out.
Yes. Concrete is porous. In severe cases urine has been penetrating for 5, 10, or 20 years — the capillaries are saturated. Enzymes and pressure washing stay on the surface because there’s no more capacity to absorb anything. We sand the surface, treat cracks and cold joints, and apply the Odor Encapsulation System in 1 to 3 coats depending on severity. In rare cases on multifamily properties where a 2–3 inch lightweight concrete topping is saturated, we remove the topping and treat the structural subfloor underneath. Structural foundation concrete is not removed.
Often no. Most contaminated plywood or OSB subfloor can be dried, sanded, and sealed in place. Where plywood has delaminated, manufactured-home particle board has failed, or the material is structurally compromised, the affected section is replaced. The inspection tells us which applies.
UV black light, pin and pinless moisture meters, and minor non-destructive exploration. Urine fluoresces under UV and retains moisture longer than surrounding materials. We map staining, record moisture readings, and look for wicking patterns. In remodeled homes where surfaces have been covered up, we use prearranged destructive testing or a forensic inspection. See our odor inspection service for scope details.
No. A home inspector’s scope of work is to check the mechanical functions of the home. Odor doesn’t prevent anything in the home from functioning, so it’s not part of a standard inspection. Some inspectors mention noticeable odor as a courtesy, but they’re not contracted to diagnose source or extent. A separate urine odor inspection is required, especially for recently remodeled homes where fresh paint, new LVP, and caulked perimeters hide the problem from a surface look.
We don’t clean carpet — we start by removing it. No enzymes, no ozone, no hydroxyl generators, no chlorine dioxide gas. We come in with demolition tools, drying equipment, and the Odor Encapsulation System. Carpet cleaning is maintenance. Ozone and enzymes are for incidental accidents or temporary control. What we do is structural remediation so your contractor or flooring installer can rebuild the property. Our work carries a 5-year guarantee in writing. Surface-level work generally doesn’t.
Our Featured Services
Pet Odor Removal Service
Carpet Removal Service
Cat Odor Removal Service
Dog Urine Odor Removal
Subfloor Odor Sealer
Cities We Serve in Los Angeles County
We provide professional Pet Odor Removal Services throughout Colusa County, including Colusa, Williams, Arbuckle, Maxwell, and nearby communities.
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Property owners and managers across L.A. call us when pet odors threaten deals, leases, or daily comfort.
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