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Find Mold & toxic material testers in Winnetka

Avatar for 911 Certified Mold Testing LLC
911 Certified Mold Testing LLC
5.0(
8
)

Serving Winnetka, CA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"Kayla is so wonderful to work with. She is so professional and knows her stuff. Iâ ve used her in 2 projects already and my clients and I are extremely satisfied with her service. Her turn around mold air testing is fast. I will definitely recommend her and will continue to use her service."
Response time4 hrs
Response rate93%
Recommended by87%of homeowners
Avatar for Mold Dwelling Testing
Mold Dwelling Testing
5.0(
3
)

Serving Winnetka, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"We had a great experience with this company during the purchase of our home. We needed mold testing done quickly, and they were the only company able to provide fast service and quick results. They were professional, responsive, and offered a very fair price. Their reports and documentation were extremely helpful during our home negotiations, and the whole process was smooth and stress-free. Highly recommend for anyone needing reliable mold testing services!"
MDT
"™3-STEP APPROACH"
TitTHE INSPECTIONle
LET US TEST
MOISTURE METER

+19

2 neighbors recently requested a quote
Avatar for Hippo Home Inspections
Hippo Home Inspections
4.9(
144
)

Serving Winnetka, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Emergency services offered

Small jobs welcome

"Excellent verbal and written communication. Timely LAB Report for three AIRBORNE tests for mold. A professional approach in offering additional services to help the customer with mold remediation."
Response time4 hrs
Response rate89%
172 neighbors recently requested a quote
Avatar for James Clifton General Contractor
James Clifton General Contractor
4.7(
27
)

Serving Winnetka, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Everyone I worked with from the company were top rate. The guys who performed the work were careful, orderly, clean, and dedicated to doing a first rate job."
Termite Repair
Termite Repair
BEFORE DECK
AFTER DECK
DECK TEXTURE & COLOR

+30

Response time1 day
1 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for INA Kitchens
INA Kitchens
5.0(
16
)

Serving Winnetka, CA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"Great, professional and VERY trustworthy construction company. Our remodeling project was to remodel the kitchen and bathrooms and it was on time and within the promised budget, there were no unexpected issues or problems that could not be solved or left aside. More than that, they were all solved in a very timely manner with the working crew, who were very friendly, organized and clean. We must admit that they were not the cheapest, but they were worth each and every penny. We highly recommend INA Kitchens and we will hire them again."
Complete Kitchen Remodel
1
2
3
4

+15

Response time3 days
Response rate86%
5 neighbors recently requested a quote
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FAQs for mold & toxic material test projects in Winnetka, CA

Some companies offer a no‑cost phone or video consultation that screens for red flags. If the discussion points to a real issue, the pro will recommend a paid on‑site inspection. The complimentary call clarifies whether you need full testing, but it isn’t a substitute for samples, lab work, or a written report. Always confirm what the free service covers before you schedule.

A standard inspection, which includes basic air and surface samples, takes an average of two hours. If the pro needs to probe hidden spaces, such as wall cavities or ductwork, plan on up to six hours. Extra time allows the inspector to reach tight areas, collect additional samples, and document findings. Lab analysis is a separate process and often adds several business days to the overall timeframe before you receive the full report.

Mold thrives where moisture lingers and air flow is poor. Common hotspots include bathroom walls, kitchen backsplashes, window sills, HVAC vents, fireplaces, crawl spaces, and enclosed attics. Check these areas regularly—especially after leaks or high‑humidity weather—to catch growth early and avoid costly repairs.

Unchecked mold can knock 20% to 37% off a home’s market value because buyers worry about hidden damage and health risks. Even after remediation, visible staining or a history of major moisture issues can still lower offers and prolong the time on the market. Addressing mold quickly protects both your property’s structural integrity and its resale appeal.

The Winnetka, CA homeowners’ guide to mold & toxic material tests

From average costs to expert advice, get all the answers you need to get your job done.