#1
Home Pro Mold Services
“Great communications and didn't add a plethora of findings that were not accurate as others we called in did. Highly recommend” — Google review
Experts Reviews · 2026 Ratings
The Best Mold Inspectors in Fountain Valley, CA
We graded 3 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
—typical jobMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range).
99%say the price was fairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”.
4.94★average ratingPlain average of every Google star rating we collected for these companies.
1.4%bad jobs (1–2★, 2 yrs)Share of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
From 23,942 Google reviews of 68 top-rated mold inspectors nationwide; 3 of them in Fountain Valley, CA. Updated November 2, 2026.
Find the right company for your job
Pick the job — we re-rank companies by how customers rated that exact job.
Overall ratings
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of mold inspectors).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Reliability (24%): How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Craft & service (0%): Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Replies to reviews (7%): How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
|---|---|---|---|---|---|
| 1 | Dr Mold RemediationFountain Valley, CA | A 99How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%99+58.1Reliability 26%98+25.6Value 15%100+15.2Experts Score= 99Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 5.00 | — |
| 2 | Home Pro Mold ServicesFountain Valley, CA | A 99How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%99+58.1Reliability 26%99+25.8Value 15%100+15.2Experts Score= 99Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAA– | 4.99 | — |
| 3 |  Vert EnvironmentalFountain Valley, CA | A 83How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 64%86+54.6Reliability 28%74+20.9Replies to reviews 8%90+7.4Experts Score= 83Not enough data for value; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AB––AA | 4.82 | — |
What jobs cost
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
|---|
Mold Inspectors in Fountain Valley, CA at a glance
How the 3 mold inspectors we rated in Fountain Valley, CA compare, and what customers praise most.
Experts Score grades
A = score 80+, F = below 20.
- Grade A3100%
- Grade B00%
- Grade C00%
- Grade D00%
- Grade F00%
Google ratings
Average stars per company.
- 4.90★ and up267%
- 4.80–4.89★133%
- 4.60–4.79★00%
- Below 4.60★00%
What customers praise
Share of Google review highlights.
- Quality5,46024%
- Professionalism5,98426%
- Responsiveness5,06222%
- Punctuality2,48911%
- Value4,21418%
Was the price fair?
All price verdicts left with reviews.
- Great price61842%
- Reasonable78253%
- Overpriced171%
- Not sure524%
Price verdicts by year
Share calling it great / reasonable / overpriced.
2025
2026
How we grade
Satisfaction (54%) — Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.
Reliability (24%) — How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.
Craft & service (penalty, up to −10) — Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.
Replies to reviews (7%) — How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.
The 3 best-rated mold inspectors in Fountain Valley, CA average 4.9★ on Google across 212 reviews. Home Pro Mold Services has the top rating (5.0★). Updated October 31, 2026.
3 companies that meet our bar: rated 4.5★ or higher on Google, with a meaningful review history (212 reviews combined) and currently operating. Request a call back and the company will phone you directly.
#2
Dr Mold Remediation
“We found mold under the kitchen sink after a small plumbing leak. They removed the affected material, cleaned and treated the area, and used proper containment while working. The job was handled quickly and the space…” — Google review
#3
Vert Environmental
“Vert environmental have been a pleasure working alongside with. Big shout out to John for always being responsive and responsible. I would totally recommend this company to anyone!” — Google review
How we pick mold inspectors in Fountain Valley
We scan Google Maps for mold inspector listings in and around Fountain Valley, keep only open businesses whose main category matches the service, and require a Google rating of at least 4.5 from at least 20 reviews. Companies are ordered by a confidence-weighted score that balances rating and review volume. We do not accept payment for placement.
Frequently asked questions
Who is the highest-rated mold inspector in Fountain Valley?
Home Pro Mold Services has the highest Google rating on our Fountain Valley list: 5.0 out of 5 from 116 reviews (as of October 31, 2026).
Which mold inspector in Fountain Valley has the most reviews?
Home Pro Mold Services has the most Google reviews among the companies listed here: 116, with a 5.0★ average.
How are these mold inspectors chosen?
Only open Fountain Valley-area businesses whose Google category matches the service, rated at least 4.5★ from at least 20 Google reviews. They are ordered by a confidence-weighted score of rating and review volume. Placement is never paid.
Also in Fountain Valley: Backyard Court Installers · Bed Bug Exterminators