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Renton, WA

Mold Inspection and Testing in Renton, WA

Renton, WA has 10 mold inspection and testing companies in our listings, 4 list themselves as open 24 hours and the most reviewed is Perma Dry Waterproofing & Drainage with 127 reviews.

10 Companies Doing Mold Testing Work in Renton

  1. 1

    Drytrace Mold Removal

    707 S Grady Way · Renton 0.3 mi

    Google rating 5.0 from 3 Google reviews

    Verified Remediation Pro

    Water DamageMoldMold Testing

  2. 2

    Home Inspections Renton WA

    340 Smithers Ave S · Renton 0.8 mi

    No public reviews yet

    Verified Remediation Pro

    Mold Testing

  3. 3

    Perma Dry Waterproofing & Drainage

    608 SW 12th St · Renton 0.8 mi

    Google rating 4.0 from 127 Google reviews

    Verified Remediation Pro

    Water DamageMoldMold Testing

  4. 4

    FireWater Restoration Services | DKI24/7

    710 Thomas Ave SW · Renton 1.0 mi

    Google rating 4.5 from 106 Google reviews

    Highly Rated 2026

    Water DamageMoldMold TestingFire and SmokeSewage

  5. 5

    Casey Colors Painting

    Service area business · Renton 4.4 mi

    Google rating 5.0 from 5 Google reviews

    Verified Remediation Pro

    Water DamageMoldMold TestingFire and Smoke

  6. 6

    First Response Water Damage24/7

    17214 174th Ave SE · Renton 4.8 mi

    Google rating 4.8 from 53 Google reviews

    Top Rated 2026

    Water DamageMoldMold TestingFire and SmokeSewage

  7. 7

    Diligence Construction & Restoration24/7

    Service area business · Renton 5.1 mi

    Google rating 4.7 from 12 Google reviews

    Highly Rated 2026

    Water DamageMoldMold TestingFire and Smoke

  8. 8

    LAT Inspection

    Service area business · Renton 7.3 mi

    Google rating 4.8 from 78 Google reviews

    Top Rated 2026

    Mold TestingAsbestosLead Paint

  9. 9

    XP Inspection Services

    20332 216th Ave SE · Renton 8.1 mi

    Google rating 5.0 from 120 Google reviews

    Best in Renton 2026Top Rated 2026

    Mold TestingAsbestos

  10. 10

    Sherlock Home Inspector LLC24/7

    Service area business · Renton 9.3 mi

    Google rating 5.0 from 95 Google reviews

    Top Rated 2026

    Mold TestingAsbestosLead Paint

Hire an Independent Inspector

A mold inspector tells you whether you have a problem, where it is and what caused it. A remediator removes it. When the same company does both, it has a reason to find mold. If you can, hire an inspector who does not do remediation, and ask the remediator to follow that inspector’s written plan.

Ask the inspector what the visit includes. A good one looks for the moisture source first, uses a moisture meter and often a thermal camera, and only takes air or surface samples when the result will change what you do. After the work, a clearance test by the same independent inspector shows whether the job is done.

How to read a mold lab report

Can You Handle It Yourself

Call a pro

Home test kits that grow spores in a dish almost always grow something, because mold spores are everywhere. They cannot tell you whether you have a problem. A moisture meter and a flashlight will tell you more for less money.

Read the step by step guide

What It Costs Around Renton

Prices in the Seattle-Tacoma-Bellevue, WA area run about 11 percent above the national average, so local jobs tend to cost more than the national figures.

JobTypical in RentonNational typical
Mold Inspection and Testingper visit, a visual inspection$225 to $650$200 to $600
Mold Inspection and Testingper visit, an inspection with samples$325 to $1,100$300 to $1,000
Mold Inspection and Testingper visit, a clearance test$325 to $900$300 to $800

Full Seattle cost guide

Questions to Ask Before You Hire

  1. Do you also do remediation? If so, who checks your work?
  2. How many air samples will you take, and will you take an outdoor control sample?
  3. Which lab analyzes the samples, and is it accredited?
  4. Will the report include moisture readings and photos, not only lab numbers?
  5. Are you licensed as a mold assessor where this home is?

Guides for This Job

Questions People Ask

How many mold inspection and testing companies serve Renton?
We list 10 companies in Renton, WA. 4 of them work from a service area without a public storefront.
Which mold inspection and testing companies in Renton are open 24 hours?
4 list themselves as open around the clock, including FireWater Restoration Services | DKI, Sherlock Home Inspector LLC and First Response Water Damage. Hours are self reported, so call to confirm someone answers at night.
Who has the best reviews in Renton?
Among companies with at least 20 public reviews, the highest rated are XP Inspection Services (5.0 from 120), Sherlock Home Inspector LLC (5.0 from 95) and LAT Inspection (4.8 from 78). A high rating from a small number of reviews is weaker evidence than a slightly lower rating from hundreds.

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Restoration Companies in Renton, WA

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