5 Best Mold Removal Services in Seattle (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Fenris Morrow, Expert in Professional Services · ✓ Data verified August 2026 · 8 min read

Seattle's marine climate means mold is rarely a one-time problem; it's a wet crawl space or a poorly vented attic waiting to happen again, and that's why mold removal services in Seattle stay busy year-round. Customers of the companies below have left just over 800 Google reviews between them, and a couple hold a perfect 5.0, so the harder question is not who does good work, it's whether you need an inspection, a full remediation, or both.

Short answer: Environix leads with a 4.9 average across 337 Google reviews, the deepest track record on this page, covering mold inspection, testing, and remediation together. Insulation Co (5.0, 281 reviews) and Quick Restoration (5.0, 83 reviews) round out the top picks for crawl-space and water-damage-related mold work. Costs vary widely by job scope, so get an in-person inspection before assuming a price.

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1. Environix
2. Insulation Co
3. Quick Restoration
4. 24H Mold Inspection of…
5. Mold Inspection & Test…
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Seattle Mold Services, Compared

#	Business	Rating	Reviews	Best for
1	Environix	4.9 ★	337	Inspection, testing, and remediation together	View ›
2	Insulation Co	5.0 ★	281	Crawl space and attic mold with insulation work	View ›
3	Quick Restoration	5.0 ★	83	Water damage response with mold prevention	View ›
4	24H Mold Inspection of Seattle	4.9 ★	57	Lab-verified mold testing and clearance	View ›
5	Mold Inspection & Testing Seattle	4.7 ★	51	Air sampling before and after remediation	View ›

5 Best Mold Removal Services in Seattle (2026)

Who handles mold in Seattle

#1 Overall🕑 Open 5 days/wk

Environix

4.9337 Google reviews

Environix is a Seattle indoor-environmental company offering mold inspection, mold remediation, asbestos and lead testing, and indoor air quality testing under one roof. The company states it has served over 5,500 clients in Seattle, working across the city's varied housing stock, from older Craftsman homes to newer construction. Its process typically starts with an inspection to confirm the source of an issue before recommending a fix.

What people praise

Confirms the root cause before quoting remediation work
Transparent about what to be concerned about versus not
Sometimes recommends do-it-yourself fixes rather than unnecessary paid work
Handles related issues like VOCs and lead in the same visit if needed

Worth knowing

Some reviewers compared it favorably against competitors who gave vague high estimates upfront, so ask for a detailed written scope either way

Reputation scorecardrank in Seattle

Rating4.9 / 5

Review volume337 · 97th

Confidencehigh

Recency6 months ago

Info completenesssite · phone · hours

Rating breakdown94% 5-star

✓ VerifiedSource: Google

Our take: The deepest review history on this page and the only company here handling inspection, testing, and remediation as one connected process, which makes it a strong default for a first call.

Website +1206-880-7592 Directions

#2🕑 Open 6 days/wk

Insulation Co

5.0281 Google reviews

Insulation Co is a Seattle contractor specializing in attic and crawl space services, including insulation removal and install, mold removal, and rodent and pest proofing. Its site lists mold removal as a distinct service line alongside insulation and drainage work, and the company frequently handles crawl space cleanouts where old insulation, moisture, and mold overlap in the same job.

What people praise

Perfect 5.0 rating with reviewers repeatedly citing competitive pricing
Crews document work with before-and-after photos
Helps customers apply for utility rebates on related insulation work
Follow-up visits reported to confirm work holds up over time

Worth knowing

Not a Google-verified business listing, so confirm licensing directly before booking

Reputation scorecardrank in Seattle

Rating5 / 5

Review volume281 · 91st

Confidencehigh

Recency3 weeks ago

Info completenesssite · phone · hours

Rating breakdown99% 5-star

✓ VerifiedSource: Google

Our take: The strongest pick when mold shows up alongside an insulation or crawl space problem, since this company treats them as one job rather than referring you elsewhere.

Website +1206-497-7358 Directions

1420 E Pine St, Seattle, WA 98122

#3🕑 Open 7 days↩ Responds to reviews

Quick Restoration

5.083 Google reviews

Quick Restoration is a Seattle water damage restoration company offering 24/7 emergency response for leaks, floods, and storm damage, with mold prevention built into its cleanup process. The company states it can be on site within 60 minutes and coordinates directly with insurance providers as part of the restoration.

What people praise

Perfect 5.0 rating across every review on file
24/7 emergency response cited by multiple reviewers
Coordinates directly with insurance companies to simplify claims
Reviewers describe thorough work that addresses root causes, not just visible damage

Worth knowing

Focused on water damage response rather than standalone mold inspection or testing

Reputation scorecardrank in Seattle

Rating5 / 5

Review volume83 · 85th

Confidencemoderate

Recency5 months ago

Info completenesssite · phone · hours

Rating breakdown100% 5-star

✓ VerifiedSource: Google

Our take: The right call when mold follows a flood or leak and you need both the water and the mold addressed by the same crew, fast.

Website +1425-444-2375 Directions

1601 5th Ave Ste 900, Seattle, WA 98101

#4🕑 Open 6 days/wk↩ Responds to reviews

24H Mold Inspection of Seattle

4.957 Google reviews

24H Mold Inspection of Seattle is a mold inspection and testing company offering same-day appointments and lab-verified reports, with air and surface samples analyzed by a state-certified lab. The company states it has no financial stake in any remediation work that follows an inspection, positioning itself as an independent tester rather than a remediation contractor.

What people praise

Reports state to hold up with insurers and attorneys, useful for disputes or claims
Reviewers describe thorough inspections that check moisture levels in walls and drywall
Post-remediation clearance testing available to confirm a fix worked
Same-day appointments reported

Worth knowing

Does not perform remediation itself, so you'll need a separate contractor if mold is found

Reputation scorecardrank in Seattle

Rating4.9 / 5

Review volume57 · 79th

Confidenceearly

Recency3 months ago

Info completenesssite · phone · hours

Rating breakdown98% 5-star

✓ VerifiedSource: Google

Our take: The pick for anyone who wants an independent, lab-backed second opinion rather than a company that both tests and sells the fix.

Website +1866-634-6614 Directions

#5🕑 Open 7 days↩ Responds to reviews

Mold Inspection & Testing Seattle

4.751 Google reviews

Mold Inspection & Testing Seattle offers unbiased mold testing across the Seattle area, including air sampling to compare an affected area against a baseline, such as a backyard sample. The company also handles clearance testing after a remediation project to confirm indoor air quality has returned to normal.

What people praise

Air testing includes a baseline comparison sample, not just the suspect area
Fast turnaround on lab results reported by reviewers
Clear communication throughout the inspection process cited repeatedly

Worth knowing

One reviewer described pricing as expensive relative to the service received

Reputation scorecardrank in Seattle

Rating4.7 / 5

Review volume51 · 74th

Confidenceearly

Recency7 weeks ago

Info completenesssite · phone · hours

Rating breakdown90% 5-star

✓ VerifiedSource: Google

Our take: A capable testing-focused option, best suited to homeowners who specifically want before-and-after air sampling around a remediation project.

Website +1206-607-6895 Directions

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How we score

Every number on this page is computed from public Google data on the date shown, not from opinion or payment. Rating is the business’s live Google star average. Review volume is how many customers have rated them, ranked against other Seattle mold companies. Confidence weighs the rating by that volume, so a 5.0 from dozens of reviewers carries less weight than a 4.9 from hundreds. Recency reflects how recently customers are still leaving reviews. No business can pay to change these numbers.

How much does mold removal cost in Seattle? (2026)

Mold job pricing depends heavily on scope: a simple air test is priced very differently from a full crawl space remediation with insulation removal. None of the companies on this page publish a standard price list, so treat any figure as a starting point, not a quote.

Serving Seattle and the Eastside

These companies cover Seattle proper and the surrounding region, including neighborhoods like Ballard, Capitol Hill, and West Seattle, as well as the Eastside and South Sound. Searching for mold removal near me? Every listing below shows a live phone number so you can reach the closest option fast.

What to ask before you hire a mold company

Do you provide a written inspection report, and is lab testing included or extra?
Do you perform remediation yourself, or only testing and inspection?
Is there a financial conflict between the person testing and the person doing the repair work?
What causes the mold to come back, and will you address that root cause?
Do you offer post-remediation clearance testing to confirm the fix worked?
Is the quote a flat rate or based on final measured scope?

Frequently asked questions

How did you choose these mold removal services?

We started from mold inspection and remediation companies in Seattle with a public Google presence, then ranked by rating, review volume, consistency, and recency. See How we score above.

Are these rankings paid?

No. Rankings come from the public Google data in the scorecard. A business can pay to be a Featured Partner, which adds a badge and top placement, but that never changes another business’s score or position on the underlying data.

How often is this updated?

The data carries a verified date (August 2026 on this page). We refresh listings periodically so ratings and review counts stay current.

Should I hire the same company to test and remediate mold?

Some homeowners prefer an independent tester with no financial stake in the remediation work, like 24H Mold Inspection of Seattle, to avoid any conflict of interest. Others prefer one company handling both for convenience. Either approach is reasonable; just be clear on which model you’re getting.

Why does Seattle have so much mold?

Seattle’s marine climate delivers persistent rainfall, overcast skies, and year-round humidity, and older housing stock with aging window seals or poor attic ventilation gives moisture easy entry points. It’s a year-round risk here, not a seasonal one.

The bottom line

Environix is the safe default for most Seattle homeowners, with the deepest review history and a process that covers inspection through remediation. If your mold followed a flood or leak, Quick Restoration’s fast response makes it worth the call instead. Either way, get a written scope before work starts.

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