Pest control service · Walnut Creek, CA · reviewed since 2024
iHow 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%97+56.9Reliability 26%99+25.8Value 15%100+15.2Experts Score= 98Not 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.98SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#15 of 86 pest control servicesiPosition by Experts Score among all companies we track in this category. · better than 84%
5.0★★★★★96 Google reviews · 23 photos
98%five-star reviews
4.95★last 12 monthsiAverage stars on reviews from the last 12 months only.
0%1–2★ in 2 yearsiShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
100%reviews answered by the owner
$246typical billiMedian bill customers of this company reported in their reviews (needs 3+ priced reviews).
Google reviewers rate Certech Environmental Services five stars based on ninety-six reviews, noting that the owner responds to all feedback. Customers consistently highlight punctuality, professional communication, and thorough treatments for pests including spiders, rodents, ants, and wasps. Many appreciate the company's willingness to return for follow-up visits without additional charges and its competitive pricing compared to other local providers.
Google rating: 5.0 out of 5 from 96 reviews (98% five-star).
Reviews on this page: 96 Google reviews (88 with written comments).
Owner responses: the business replied to 100% of reviews.
Most recent review: October 11, 2026.
Service: Pest Control Service serving Walnut Creek, California.
Data from Google, last updated October 26, 2026.
Score profile vs other pest control services
Score per factor (100 = best)iEach factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: value and momentum; weakest: satisfaction.
This companyPest Control Services median0 = centre, 100 = best
SatisfactioniSatisfaction · 54% of the scoreRecency-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.Certech Environmental Services: 97/100 on this factor. Category median: 93.A
97
ReliabilityiReliability · 24% of the scoreHow 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.Certech Environmental Services: 99/100 on this factor. Category median: 93.A
99
Craft & serviceiCraft & service · penalty only, up to −10 pointsGoogle 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.Not enough reviews for this factor yet. Category median: 98.–
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ValueiValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Certech Environmental Services: 100/100 on this factor. Category median: 100.A
100
MomentumiMomentum · penalty only, up to −10 pointsPenalises 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.Certech Environmental Services: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsiReplies to reviews · 7% of the scoreHow 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.Not enough reviews for this factor yet. Category median: 90.–
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Bar = this company · dark tick = category median.
Star ratings
96 Google reviews we collected
5.0of 5
5 stars9498%
4 stars11%
3 stars11%
2 stars00%
1 star00%
Praise vs complaints
Phrases our text analysis found in 88 written reviews
99%praise
Praise18699%
Complaints21%
PriceiGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.
Price verdicts customers left with their Google review
100%fair
Great price1747%
Reasonable1953%
Overpriced00%
Not sure00%
$246+112% vs typical pest control services
Middle half of what 24 customers paid ($115–$371) · gold mark = category median.
Topic share
How often each topic comes up in the written reviews
7topics
Staff & attitude5127%
Quality & results4222%
Speed & response3720%
Would recommend2413%
Communication1810%
Price & value105%
Honesty & trust63%
What customers talk about
We read 88 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“We had a great experience, they were on time, very professional.”
“Excellent experience dealing with this company and specifically Jordan.”
“He worked efficiently and explained things thoroughly.”
“We highly recommend Certech and look forward to a rodent free home.”
“The person who came to our house was Gordon and he explained clearly what kind of wasps and yellow jackets they were and what he was going to do and h…”
“Their pricing for a one-time service is incredibly reasonable, especially for the high quality of work and peace of mind they provide.”
“He was so honest he even told me I should be fine now with how things were and just to keep monitoring the exclusion areas and check the traps now and then.”
People customers mention
Justin8 reviews
Daniel8 reviews
Jonathan6 reviews
Danny4 reviews
Jordan3 reviews
Jose3 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Reviews for your job
Customers hired Certech Environmental Services for 8 kinds of job. Pick one to see what they paid and said.
RDanielle5 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 weeks ago★★★★★
Great service done by Jordan! He was amazing start to finish. I appreciate his hard work. We had a TON of spiders that he took care of. I am very pleased with the service I received.
Paid $120–140Reasonable priceSpider extermination
Fel2 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a month ago★★★★★
Another awesome service from Certect Environmental Services! We are happy! We recommend them! Jonathan was our technician and he is beyond great! And shoutout to Justin! 5 STARS!
Paid $100–120Reasonable price
Eric10 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a month ago★★★★★
I had an amazing experience with Jordan from Certech! He worked efficiently and explained things thoroughly. The communication was extremely professional as well!
Paid $100–120Great priceService not listed
Tanya2 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a month ago★★★★★
Jordan was really efficient and very helpful. I will definitely continue using their service.
Bonnie4 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 months ago★★★★★
Nico was extremely thorough around the entire perimeter of the yard. Took the time to check under the eaves in front of the house for wasp nests and treated. Also any ants detected all around the house and patio.. I am so pleased with the care. I hope he will be available for my quarterly pest control. Thank you Nico!
Paid $100–120Reasonable priceHornet & wasp exterminationSpider extermination
Laura9 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited 2 months ago★★★★★
Great service. Justin and his team answered the phone, came out to assess the situation immediately and got right to work. They sealed and protected my attic & crawl space thoroughly. The critters were gone by the time Certech was called, as I had already removed the insulation and replaced duct work. However, they…
We’ve been using Certech for pest control at our house for several years. We used a bigger commercial pest company before and still had tons of bugs. We’re surrounded by open space so critters are a part of life. Since we switched to Certech the bugs have gone way down. Even the spiders, which seem to be very hard to prevent. Recently we heard something crawling around in our attic. Jonathan came out the very next day. He went through our whole crawl space, set traps, checked for droppings, and addressed an opening where he thought a squirrel might be able to get through. Jonathan spent over an hour making sure everything was secure and it was all included in our monthly service. There was no extra cost. The prices are good and the service is outstanding!
Price assessment: Great price
Services: Rodent extermination, Spider extermination, Ant extermination
Pest type: Ants, Rodents, Cockroaches, Spiders, Other
Response from the owner · a week ago
Hi Lauren. Thank you for taking the time to leave this awesome review! Yes - Jonathan is a Rock Star and continues to deliver service excellence. We appreciate your business!
Melissa Montblanc2 reviewsiTotal number of Google reviews Melissa has written across all businesses on Google Maps, not just this one.
Excellent experience dealing with this company and specifically Jordan. Happy to recommend!
Response from the owner · 2 weeks ago
Awesome feedback Melissa! Thank you for your support and trust of Certech Environmental Services. Yes, Jordan is a great addition to the Certech Family. Cheers
RDanielle Romero5 reviewsiTotal number of Google reviews RDanielle has written across all businesses on Google Maps, not just this one.
Great service done by Jordan! He was amazing start to finish. I appreciate his hard work. We had a TON of spiders that he took care of. I am very pleased with the service I received.
Price assessment: Reasonable price
Price: $120–140
Services: Spider extermination
Pest type: Spiders
Response from the owner · 3 weeks ago
Awesome feedback! Thank you for your support and your trust. We are your partner in pest prevention. Cheers
Diane Villalobos1 reviewiTotal number of Google reviews Diane has written across all businesses on Google Maps, not just this one.
We had a great experience, they were on time, very professional. They even came back year later and treated new spot and did not charge. We are very happy. Thank you the help.
Response from the owner · 3 weeks ago
Thanks Diane! Drywood termites can be very challenging in structures that cannot be fumigated. Glad that we could help and thank you for your business! Cheers
Tyler Borek5 reviewsiTotal number of Google reviews Tyler has written across all businesses on Google Maps, not just this one.
Jose is excellent. Great communicator. I've enjoyed working with him.
Pest type: Other
Response from the owner · 3 weeks ago
Hi Tyler - Thank you for leaving this very kind review of Jose's service delivery. We are very lucky to have him in the Certech Family. If we can help in the future, please let us know. Cheers
Olivia Song3 reviewsiTotal number of Google reviews Olivia has written across all businesses on Google Maps, not just this one.
I can’t express how much gratitude I have towards Certech. For years we had yellow jackets and wasp infestation. A few homes in my area were going through the same thing. We tried another exterminator company and it didn’t work. But when things got scary and we had way too many wasps and yellow jackets, we contacted Certech and they did an exceptional job!! The person who came to our house was Gordon and he explained clearly what kind of wasps and yellow jackets they were and what he was going to do and how long it will take before I see results. It was almost immediate. I couldn’t believe how successful they were at removing all of the wasps and nests and Gordon was super professional and did a fantastic job!! Yay, we’re wasp-free and we can leave the house without worrying about the wasps and yellow jackets surrounding our house.
Price assessment: Reasonable price
Services: Hornet & wasp extermination
Pest type: Other
Response from the owner · a month ago
Hi Olivia. This is an amazing testimonial of Gordan's performance. We are humbled and honored by your kind words. Thank you for your business!
Fel Aquino2 reviewsiTotal number of Google reviews Fel has written across all businesses on Google Maps, not just this one.
Another awesome service from Certect Environmental Services! We are happy! We recommend them! Jonathan was our technician and he is beyond great! And shoutout to Justin! 5 STARS!
Price assessment: Reasonable price
Price: $100–120
Pest type: Ants, Termites, Rodents, Cockroaches, Spiders, Bed bugs, Mosquitoes, Other
Response from the owner · a month ago
Shazaam! What a wonderful review of Jonathan. We are humbled by your feedback and are glad that we are partners in pest prevention. Cheers
Susan W8 reviewsiTotal number of Google reviews Susan has written across all businesses on Google Maps, not just this one.
I had an amazing experience with Jordan from Certech! He worked efficiently and explained things thoroughly. The communication was extremely professional as well!
Price assessment: Great price
Price: $100–120
Services: Service not listed
Pest type: Other
Response from the owner · a month ago
Thanks Eric! Jordan is a true professional and we are grateful to have him on our team. If we can help out in the future please let us know. Cheers
Tanya Tam2 reviewsiTotal number of Google reviews Tanya has written across all businesses on Google Maps, not just this one.
Jordan was really efficient and very helpful. I will definitely continue using their service.
Price assessment: Reasonable price
Price: $60–80
Services: Rodent extermination, Ant extermination
Response from the owner · a month ago
Hi Tanya! These are wonderful and kind words. Thank you for taking the time to leave us this 5 star review. Jordan is a great addition to the Certech Family. Please think of Certech next time that we can help. Cheers
