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Odor Removal Service in Alameda County, CA

Pulled the Flooring in Alameda County and Found Cat Urine Soaked Into the Subfloor?

Many Alameda County buyers move into a vintage Berkeley craftsman or Oakland Victorian, and within weeks the pet odor returns through the original Douglas fir subfloor — surface treatments couldn't solve the problem because the odor is embedded deep below the surface in the subfloor, drywall, and framing.

If you've already tried cleaning and the smell keeps coming back, the problem is not on the surface.

Cleaning may remove visible urine, but when the smell remains, the odor is coming from urine embedded below the surface. If you haven't identified where the odor is coming from, you're guessing — and guessing is what leads to repeated cleaning, failed repairs, and wasted money.

In many Alameda County homes, the urine is embedded in the subfloor, drywall, or concrete below the surface. It will continue to come back until the source is properly identified and treated.

We're not a cleaning service — we identify and treat urine odor embedded in the subfloor, drywall, concrete, and framing below the surface. Our structural odor seal is designed to help contain and reduce embedded urine vapors. Backed by a 5-year written guarantee on qualifying work.

Serving Oakland, Fremont, Hayward, Berkeley, San Leandro, Livermore, Pleasanton, Alameda, Union City, Dublin, Castro Valley, Newark, Albany, Emeryville, and all Alameda County for 30+ years.

Get a Free QuoteCall (877) 386-3677Schedule a Pet Odor Inspection

Most projects start with a quick phone call to determine if an inspection is needed.

If you can smell it, we can find it. If we can find it, we can treat and seal it at the source.

Founded 1989 • Pet Odor Specialists Since 2000 • Structural Remediation Since 2012

Odor Types We Service

Odor Removal Across Alameda County

Structural odor remediation across Alameda County — we treat and seal odor at the source, backed by a 5-year written guarantee on qualifying work and 30+ years of field experience.

  • UV blacklight revealing hidden pet urine stains on a floor

    Pet urine odor (cat & dog)

    Our specialty: urine that has soaked past the carpet into padding, subfloor, drywall and slab. We find it, remove what has to go, and seal the rest at the source.

    Pet odor removal by city in Alameda County
  • Technician inspecting rodent-contaminated attic insulation

    Animal & biological odor

    Feces, shelter and hoarding conditions, and rodent or wildlife contamination.

  • Technician with a flashlight inspecting behind a kitchen cabinet after a cockroach infestation

    Cockroach & pest-infestation odor

    Odor left in walls, subfloor and cabinetry after an infestation.

  • Technician testing stained subfloor with a moisture meter in a vacant apartment

    Human urine & transient odor

    Human urine odor from incontinence, neglect, or vacant and transiently occupied residential and commercial properties, plus similar transient-source odors.

  • Technician taking moisture readings during an odor inspection

    Other persistent odors

    Assessed per inspection. We take qualified jobs after a free phone consult.

If This Sounds Familiar

If You're Dealing With Any of These — You're in the Right Place

Every one of these points to the same thing: urine embedded in the subfloor, drywall, concrete, or framing below the surface. We address each one.

  • Bought a home in Alameda County and now it smells like cat urine
  • Tenant moved out and left pet urine odor behind
  • Removed old flooring and the smell is still there
  • Our pets ruined our carpet and we're replacing it — we want the subfloor odor gone before new carpet is installed
  • You've already tried cleaning and the smell keeps coming back
  • Planning new flooring installation and need subfloor evaluated first

Common Odor Problems by Area in Alameda County

30+ years of work across Alameda County means we've seen the contamination patterns specific to each part of the county. Here's what we typically find by area.

Berkeley / North Oakland / Albany — Pet Damage in Victorian Subfloors Between Student Tenants

"Just bought a 1920s craftsman near UC Berkeley. Three rounds of student tenants with pets in the prior decade. The smell hits every foggy morning — which is most mornings. Family of four moving in next month."

Decades of tenant cat and dog urine have wicked into the original Douglas fir subfloor. Marine layer humidity brings the smell back daily.

Real Berkeley/North Oakland Job

Berkeley vintage Craftsman — original Douglas fir subfloor, multi-decade cat urine contamination across upstairs bedrooms — 1920s Craftsman near UC Berkeley with original Douglas fir subfloor on the second story. Inspection revealed cat urine contamination across the subfloor in three upstairs bedrooms, consistent with multi-cat household occupancy by previous owners over many years. Marine layer humidity from the Bay was reactivating the embedded contamination on a daily cycle. Common in Berkeley, North Oakland, and Alameda Island vintage construction where multi-decade pet ownership across owners produces deep subfloor saturation. All affected materials are addressed so the odor doesn't return after remediation.

Cities served: Berkeley, North Oakland, Albany, Emeryville, Piedmont (border)

Oakland / Piedmont / Rockridge — Severe Multi-Family Unit Damage After Extended Tenant Pet Occupancy

"Landlord in Oakland. Tenant moved out after a 7-year lease with multiple pets. Whole unit reeks. Cleaner spent 10 hours and said it's not coming out. New lease signed for next month."

Seven years of tenant cat and dog urine have saturated the carpet pad, bled into the subfloor, and trapped in lower drywall. Multi-substrate remediation is required before the next lease starts.

Real Oakland Job

Oakland multi-family unit — tenant-departure cleanout with severe contamination from extended pet occupancy — Oakland duplex unit with extended single-tenant occupancy that had included multiple pets. Inspection revealed substantial urine contamination across the carpet, pad, subfloor, and lower drywall sections in main living areas. Material removal required before treatment could begin. Common in Oakland and Hayward multi-family rental units where extended tenant pet damage is discovered between rental cycles. The affected areas are addressed so the unit can be turned over without recurring odor issues.

Cities served: Oakland, Piedmont, Lake Merritt, Rockridge, Temescal, Fruitvale

Pleasanton / Livermore / Dublin — Smell Hits Hardest in Summer Heat After New Owners Move In

"Closed on a Pleasanton tract home in spring. First 95° summer day the smell from the slab kicked in hard with the AC running. Family of four. We need to address this before school starts."

The smell is stronger when the AC is on. Pet urine from previous owners has absorbed into the concrete slab — the slab itself gets sealed.

Real Tri-Valley Job

Pleasanton Tri-Valley tract home — slab-on-grade with multi-pet contamination, summer heat amplifying odor.

Cities served: Pleasanton, Livermore, Dublin, Sunol

San Leandro / Hayward / Castro Valley — Multi-Tenant Pet Damage Discovered Between Rental Cycles

"Property manager handling Hayward rentals. Long-term tenant just moved out — multi-pet household over years. The smell is severe across multiple rooms. New tenant signed for next month."

Years of tenant cat and dog urine have penetrated the wood subfloor and seeped into lower drywall. The inspection scopes which materials are affected so re-leasing isn't delayed.

Real Job

A landlord in Hayward calls after a long-term tenant move-out to figure out scope before re-leasing. Multi-tenant pet contamination over years. Inspection identifies substrate type. The affected areas are addressed so the unit can be turned over without recurring odor issues.

Cities served: San Leandro, Hayward, Castro Valley, Cherryland, Ashland, Fairview, San Lorenzo

Fremont / Newark / Union City — Inherited Pet Damage Discovered After Closing Escrow

"Closed on a Fremont home that had additions over the years — original 1960s plus a 1990s slab addition. Smell varies room to room. Heater ran for the first time last week and it got way worse. Two kids and a dog."

Mixed-era construction means cat urine can be in different substrates room to room — wood subfloor in older sections, concrete slab in additions. The inspection identifies the source in each affected area.

Real Job

A buyer closes on a Fremont home and notices the smell after the first heat wave. Inspection identifies whether the contamination is in the wood subfloor of older sections or the concrete slab of newer additions. The inspection provides the documented map and itemized estimate needed to determine next steps.

Cities served: Fremont, Newark, Union City

Alameda Island / East End / Bay Farm — Victorian Subfloor Smell That Returns with Bay Humidity

"Inherited a Victorian on Alameda Island from my grandfather. Multi-decade pet history. Smell hits every time the Bay humidity rolls in. Listing the house next spring — need it resolved."

Decades of cat urine have wicked into the original wood subfloor. Bay humidity brings the smell back on a daily cycle.

Real Job

A buyer closes on an Alameda Island Victorian and the smell returns each time the Bay humidity rolls in. Multi-decade pet ownership has soaked into the original wood subfloor. Once the source is identified, the affected materials are treated so the odor doesn't come back.

Cities served: Alameda Island — East End, West End, Bay Farm Island

Every property is different. An inspection is required to determine the exact scope and cost.

Odor Problems We Handle in Alameda County

Each service below addresses a specific contamination type. Pick the one that matches your situation to see process, scope, and pricing.

Where the Smell Is Coming From

What Caused the Odor

Where to Start / Special Situations

What Happens If You Don't Fix It

Odor inside materials doesn't go away — it becomes more noticeable as the home heats up, closes up, or sits over time.

  • The smell intensifies

    Urine remains embedded in subfloor, drywall, concrete, or framing and reactivates when temperature or humidity changes — which is why the smell often gets stronger when the home warms up, when windows have been closed, or after rain raises indoor humidity.

  • New flooring over contamination doesn't last

    New flooring may temporarily suppress the odor, but if the subfloor or concrete is contaminated, the smell will come back. We remove contaminated flooring and dispose of it, then treat the subfloor or slab so it's clean and ready for new flooring — ready for your contractor or flooring installer.

  • Remediation cost increases

    The longer urine sits in subfloor, drywall, and framing, the deeper it penetrates. Today's $3,500 job is next year's $7,500 job.

  • Property value drops

    Pet urine odor can reduce resale value by 5–15% — often more than the cost of proper remediation.

Remediate now, or remediate later at higher cost.

Every Project Starts With an Inspection

If you don't identify the source, you'll never get rid of the odor.

Our Pet Odor Inspection Service finds the source, maps the contamination, and documents the damage. You get an itemized estimate and a written summary report — a professional document for negotiations, disputes, or remediation planning.

Free phone quote. The inspection is the diagnostic step — not a sales call.

Schedule a Pet Odor Inspection

Frequently Asked Questions — Alameda County

Do you actually come out to Alameda County?

Yes. Alameda County is within our regular service area. We cover Oakland, Fremont, Hayward, Berkeley, San Leandro, Pleasanton, and all surrounding communities.

How much does pet odor removal cost in Alameda County?

Cost depends on contamination scope, surfaces affected, and square footage. Every project starts with our inspection, which produces an itemized estimate. Free phone quote available.

Do you work with Alameda County real estate agents?

Yes. We regularly work with Alameda County real estate agents on pre-listing remediation, post-purchase discoveries, and disclosure disputes. Work is coordinated with the property owner or their contractor as needed.

How long does the project take?

Most full-home projects are completed in several working days. The exact timeline depends on the size of the home and severity of contamination — your inspection report includes a project-specific timeline. The job isn't complete until the odor is gone and you approve it during the final walkthrough.

How long after treatment will the odor be gone?

In most cases, once sealing is complete, the odor is gone within 24 hours. Extreme cases may require a double coating but that's rare.

Is the 5-year guarantee in writing?

Yes. We provide a 5-year written guarantee on qualifying work. Documented on every project.

Cities We Serve in Alameda County

Oakland, Fremont, Hayward, Berkeley, San Leandro, Livermore, Pleasanton, Alameda, Union City, Dublin, Castro Valley, Newark, Albany, Emeryville, Piedmont, Cherryland, Ashland, San Lorenzo, Sunol, Fairview. All Alameda County.

You don't have to figure this out yourself. We handle this every day. Most people call just to understand what's actually causing the smell. You're not committing to a project — just getting clarity.

Get a Free Quote877-386-3677 — Call to Find Out What's Actually Causing the Smell

Ready to Stop the Odor at the Source?

If cleaning isn't getting the job done, you don't have a cleaning problem — you have urine odor embedded in the subfloor, drywall, or concrete below the surface. Free phone quote. The inspection is scoped before any work begins.

877-386-3677 — Call Now — Free Phone Quote (10 Minutes)Schedule a Pet Odor Inspection

If you can smell it, we can find it. If we can find it, we can treat and seal it at the source.