Water damage drying
Fire & smoke cleanup
Mold remediation
Storm response
Sewage cleanup
ReconstructionFree visual inspection and a written scope of work before any mitigation begins - photos, moisture readings, and drying logs go in your claim file
The scope we write is the scope we bill. Anything new gets shown to you, in writing, before we touch it.
Get your free estimateFast, Reliable Mold Remediation Across Pasadena
Mold remediation in Pasadena typically costs between $1,800 and $6,500 for a contained room treatment, and $4,000 to $15,000 when growth has spread into wall cavities, subfloors, or crawl spaces. Most Pasadena jobs are completed within 3 to 7 days, depending on how far moisture has wicked into original plaster and framing. If you’ve spotted staining on a wall, smelled something earthy that won’t go away, or just found out a supply line has been leaking behind a 1920s bathroom wall, call us at (626) 657-5106. A live person answers, day or night.
We work throughout Pasadena every week, from the Arroyo Seco canyon homes to the flatland Craftsman streets north of Colorado Boulevard. Older homes here don’t behave like newer construction. They hold moisture differently, hide mold more effectively, and require drying methods that respect original materials. That’s the work we’ve built our process around.
Why Marsh Water Damage Pasadena Is Pasadena’s Preferred Mold Remediation Company
Pasadena homeowners call us because we understand what a 1923 Craftsman or a 1931 Spanish Colonial does when water gets where it shouldn’t. Our Mold Remediation team has worked inside more lath-and-plaster walls in this city than we can count, and we know exactly how moisture travels through raised foundations, clay subsoil, and original framing. That local knowledge changes how we scope a job. It’s not enough to kill surface mold. You have to confirm the lath behind the plaster is dry and the subfloor cavity isn’t feeding moisture back up into the framing. We check both, every time.
Every Marsh technician is background-checked, identity-verified, and sent to you by name and photo before the visit. When the doorbell rings, the person standing there has a photo ID badge that matches the person you were told to expect. That’s the Threshold Verified standard, and it’s non-negotiable on every job in Pasadena, whether it’s a Bungalow Heaven crawl space or a hillside home above the Rose Bowl.
Since 2005, as part of the Threshold Group family of restoration companies, we’ve built our Pasadena reputation one water event at a time. We hold IICRC, RIA, and IFA credentials on our technical team. We run Dri-Eaz, Phoenix, and Injectidry equipment, the same gear used on large commercial losses, applied to residential jobs. And we put the 365-Day Done Right Promise on every work order: a written guarantee that if the repair is not right within a full year, we make it right. A free second visit is included automatically, not something you have to argue for.
Call (626) 657-5106 and you’ll speak to a person, not a voicemail queue. That matters when you’re standing in a hallway looking at a spreading stain at 11 p.m.
Restoration work we handle
Mold Remediation Services in Pasadena
Mold Remediation Services in Pasadena mean something specific because the housing stock is specific. In this city, remediation almost always involves lath-and-plaster walls in pre-1940 homes, where moisture wicks into wood lath behind intact plaster and can hide active growth for weeks, unlike neighboring cities with mostly drywall construction where mold shows through quickly. The job starts with containment and air pressure control, moves to source removal of contaminated material, then drying to verified moisture targets, antimicrobial treatment, and finally restoration. In Pasadena, that last step often means matching original plaster texture, not hanging new drywall.
Containment and Source Removal
We seal the affected room with negative air pressure so mold spores don’t travel through your house during the work. Then we remove the mold at its source: contaminated plaster, wet lath, saturated baseboards, and any insulation that’s been compromised. This is where Pasadena-specific expertise changes the outcome. If only the visible mold is removed and the lath behind it is left wet, the growth comes back within months. We don’t skip that step.
Drying and Verification
After the contaminated material is out, we dry the structure using professional equipment. On original plaster walls, aggressive drying cracks the plaster and separates it from the lath, so we use calibrated, lower-velocity drying protocols that protect the wall’s integrity. We take daily moisture readings from the lath and framing, and we don’t stop until wood moisture content is verified under 15%.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Professional Mold Removal in Pasadena
Professional Mold Removal in Pasadena is rarely a single-day job, because the mold you can see is almost never the whole story. In a city where most homes were built between 1900 and 1940, the typical job involves elevated foundations, original plumbing that’s near or past its service life, and wall assemblies that hold moisture close to the framing. We treat the entire moisture chain: the source of the water, the saturated materials, the airborne spores, and the hidden cavities where mold keeps growing.
Wall Cavity and Lath Treatment
When mold is in a wall cavity, we open just enough to expose the contamination and then set containment. The exposed lath and studs get treated with antimicrobial agents after drying, and we verify moisture at the framing level before any patching begins. This is the difference between removing mold and removing the conditions that caused it.
Crawl Space and Raised Foundation Work
Mold under a Pasadena home with a raised foundation needs its own containment strategy. We work in crawl spaces regularly, including homes on expansive clay soil where subfloor moisture is a persistent problem. Drywall on the floor above can test clean while the joist cavities beneath it are still growing mold. We inspect and treat both, and we’ll tell you if vapor barrier work or drainage correction needs to happen before remediation can last.
Trusted Brands We Service in Pasadena
We run equipment from Dri-Eaz, Phoenix, XPOWER, B-Air, and Injectidry on Pasadena jobs, depending on what the structure requires. For lath-and-plaster wall cavities, Injectidry mats are often the right tool because they pull moisture out of wood lath and framing without forcing hot, dry air against fragile original plaster. Phoenix and Dri-Eaz dehumidifiers and air movers handle room-level drying in larger spaces and crawl areas. Because we service Pasadena routinely, we stock replacement filters, hoses, and mats locally, so a failed component doesn’t stop your job for three days while parts ship from out of state. That’s part of running a professional restoration company in a city with this many century-old homes: you keep the right gear on hand.
See the difference
Before
After
Before
After
Before
AfterCommon Mold Remediation Problems We See in Pasadena Homes
- Mold behind intact plaster. A wall can look stained but dry to the touch while lath behind it stays saturated. This happens constantly in Craftsman and Spanish Colonial homes. We check with moisture meters, not just eyes.
- Clay soil wicking moisture into floor framing. In areas like Linda Vista and the Arroyo Seco, expansive clay holds water after heavy rains and releases it slowly into raised foundation cavities. Crawl space mold keeps returning until that moisture source is addressed.
- Original cast-iron supply lines failing inside walls. Pasadena homes from the 1900s through the 1930s often have original galvanized or cast-iron plumbing. A slow pinhole leak inside a wall cavity can feed mold for weeks before anyone notices.
- Aggressive drying damaging original plaster. National franchise drying protocols are built for drywall. On lath-and-plaster, too much heat and airflow causes cracking and delamination. We adjust drying parameters for older materials.
Pricing for Mold Remediation in Pasadena, CA
Mold remediation in Pasadena runs higher than in drywall-heavy suburbs because the work is more labor-intensive and the materials require more care. A contained single-wall remediation typically runs $2,500 to $5,500, including containment, source removal, drying, antimicrobial treatment, and plaster patching. A full room with wall cavity work runs $3,500 to $8,000. A crawl space treatment under a raised foundation runs $1,800 to $4,500, depending on square footage and whether vapor barrier replacement is needed. If growth has spread across multiple rooms from a single roof leak, $6,500 to $15,000 is a realistic range. We give you a written price before any work starts, with no after-the-fact surprises. Call (626) 657-5106 for a free estimate based on a real inspection of your home.
We Also Serve Cities Near Pasadena
While this page focuses on Mold Remediation in Pasadena, our crews also serve Altadena, San Gabriel, Alhambra, and Temple City. Homes in those areas share much of Pasadena’s older housing stock, so the same lath-and-plaster and raised foundation expertise applies. If you’re in one of those cities and need mold work, call us at (626) 657-5106 and we’ll schedule an assessment.
Serving Pasadena, CA - Our Local Coverage Area
We’re based in the Pasadena area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Mold Remediation in Pasadena
You prevent recurrence by drying the lath and framing to verified moisture targets below 15% wood moisture content before patching, and by eliminating the water source that fed the mold in the first place. In Pasadena homes, that often means repairing original plumbing, directing downspouts away from the foundation, and assessing the crawl space for soil moisture wicking. We document every moisture reading and give you a written record of what was done. Call (626) 657-5106 to schedule an assessment.
Yes, we work with Pasadena plasterers who specialize in matching original textures, from smooth trowel finishes to sand and skip-trowel patterns. We can’t promise a seamless invisible patch in every lighting condition, but we can get very close, and we’ll tell you honestly before the work starts what to expect. The alternative is a drywall patch that stands out. Call (626) 657-5106 and we’ll walk you through what’s possible in your specific wall.
Yes, and it changes the scope of the job. Homes built between 1900 and 1940 often have original cast-iron or galvanized supply lines that are near or past their service life. If the mold came from a failed section of pipe, we coordinate with a local plumber to replace or repair the line before drying, otherwise the mold returns. We’ll tell you what we found, what it means, and what needs to happen next, in plain English. Call (626) 657-5106 for an inspection.
Within days, not weeks. Pasadena hillside homes in areas like Linda Vista and the Arroyo Seco sit on expansive clay that wicks moisture into floor framing, and original plaster holds water against wood lath far longer than drywall does. The longer growth has to establish, the more material has to be removed and the higher the cost goes. Call (626) 657-5106 the day you find the leak, and we’ll get someone out to assess the damage and set containment if needed.
Yes, if the crawl space has active growth, it has to be treated as part of the same job. Mold in a Pasadena crawl space sends spores up through floor cavities and can reactivate growth in the living space above, especially on clay soil lots where moisture runs high after winter rains. We inspect the crawl space as part of every full-home mold assessment in Pasadena, and we’ll include it in the written scope and price if treatment is needed. Call (626) 657-5106 to schedule.
If you’re seeing mold or smelling something that won’t go away in a Pasadena home, don’t wait. Call (626) 657-5106 for a free estimate and a same-day assessment. A live person answers, and the technician who shows up will be someone you already know by name and photo.
Written by Tobias Reyner, Owner at Marsh Water Damage Pasadena, serving Pasadena since 2005.