Janitorial service · Corona, CA · reviewed since 2016
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 55%91+49.6Reliability 24%90+21.8Value 14%100+14.1Replies to reviews 7%54+3.8Craft & service penalty99−0.1Experts Score= 89Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.89SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#21 of 33 commercial cleaning servicesiPosition by Experts Score among all companies we track in this category. · better than 38%
4.8★★★★★59 Google reviews · 18 photos
95%five-star reviews
5.00★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.
59%reviews answered by the owner
$424typical billiMedian bill customers of this company reported in their reviews (needs 3+ priced reviews).
Google reviewers rate Smart Janitorial 4.8 out of 5 based on 59 reviews, with the owner responding to 59 percent of them. Clients frequently praise the company for punctuality, fair pricing, and effective communication from account representatives. Services include office, warehouse, and residential cleaning, with many customers noting thorough work and willingness to return for touch-ups. The sole low-star review criticizes the company for leaving promotional postcards on the ground outside offices.
Google rating: 4.8 out of 5 from 59 reviews (95% five-star).
Reviews on this page: 59 Google reviews (56 with written comments, 1 with photos).
Owner responses: the business replied to 59% of reviews.
Most recent review: September 15, 2026.
Service: Commercial Cleaning Service serving Corona, California.
Data from Google, last updated October 29, 2026.
Score profile vs other commercial cleaning 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: replies to reviews.
Smart JanitorialCommercial Cleaning 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.Smart Janitorial: 91/100 on this factor. Category median: 93.A
91
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.Smart Janitorial: 90/100 on this factor. Category median: 93.A
90
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.Smart Janitorial: 99/100 on this factor. Category median: 99.A
99
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.Smart Janitorial: 100/100 on this factor. Category median: 96.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.Smart Janitorial: 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.Smart Janitorial: 54/100 on this factor. Category median: 55.C
54
Bar = this company · dark tick = category median.
Star ratings
59 Google reviews we collected
4.8of 5
5 stars5695%
4 stars12%
3 stars00%
2 stars00%
1 star23%
Praise vs complaints
Phrases our text analysis found in 56 written reviews
99%praise
Praise12099%
Complaints11%
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 price457%
Reasonable343%
Overpriced00%
Not sure00%
$424+53% vs typical commercial cleaning services
Middle half of what 3 customers paid ($338–$637) · gold mark = category median.
Topic share
How often each topic comes up in the written reviews
7topics
Speed & response2823%
Staff & attitude2521%
Would recommend2521%
Quality & results2420%
Communication76%
Price & value76%
Honesty & trust54%
What customers talk about
We read 56 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“He’s responsive, helpful, and makes the process really straightforward.”
“Absolutely amazing company to work with: professional, punctual, great quality of work, and very fair pricing!”
“I will continue to work with Smart Janitorial in the future and would recommend them for commercial work.”
“Their team is consistently professional , reliable and thorough , ensuring our facility is always spotless , sanitized and welcoming for both patient…”
“Shout out to Issac, our account representative, who has been great to work with and is always easy to communicate with.”
“They were really professional and gave us a fair price.”
“They are reliable, thorough, and consistently do an amazing job.”
People customers mention
Rivail4 reviews
Lou3 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Reviews for your job
Customers hired Smart Janitorial for 1 kind of job. Pick one to see what they paid and said.
DDiana10 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. · 5 months ago★★★★★
We contacted them as we were very unhappy with our current service. They did a phenomenal job. Thank you
Paid $300–350Great priceOffice cleaning
HHTT1 reviewiTotal 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. · 8 months ago★★★★★
I am happy with the work performed I will continue to work with Smart Janitorial in the future and would recommend them for commercial work.
Paid $400–450Reasonable priceOffice cleaning
JJasmine1 reviewiTotal 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. · 10 months ago★★★★★
Working with Smart Janitorail was smooth and seamless. Communication was easy and effective and the team executed the job.
Paid $500+Great priceOffice cleaningService not listed
I’ve had a great experience with Smart Janitorial. Shout out to Issac, our account representative, who has been great to work with and is always easy to communicate with. He’s responsive, helpful, and makes the process really straightforward. The cleaning has also been great, and they’re willing to come back for any touch-ups to make sure everything is up to our satisfaction. Overall, it’s been an easy and positive experience working with them.
Response from the owner · a month ago
Thank you so much, Melody! We truly appreciate you taking the time to share your experience with us. We’re glad to hear that Issac has been helpful and easy to communicate with. We’ll be sure to share your kind words with Issac and the cleaning team. We appreciate your business and look forward to continuing to provide you with great service! – Smart Janitorial Team
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Simply Mandys3 reviewsiTotal number of Google reviews Simply has written across all businesses on Google Maps, not just this one.
If you’re looking for a team that will take care of you. Don’t look further. They great
Response from the owner · 3 months ago
Thank you so much for the review Mandy! Reviews like yours keep our team working. We are happy to hear our team made you feel taken care of. We look forward to working with you in the future. – Smart Team
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Hudson Butcher Supply2 reviewsiTotal number of Google reviews Hudson has written across all businesses on Google Maps, not just this one.
Absolutely amazing company to work with: professional, punctual, great quality of work, and very fair pricing! Shoutout to Mr. Lou and Mr. Mario for such a job well done :D
Response from the owner · 3 months ago
Nguyen, thank you so much for the awesome review! We’re really glad to hear you were happy with the quality of work and the overall experience. We’ll definitely make sure Lou and Mario see your shoutout—they’ll love hearing it!
We truly appreciate your business and look forward to working with you again. - Smart Team
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Donny FrancoLocal Guide · 15 reviewsiTotal number of Google reviews Donny has written across all businesses on Google Maps, not just this one.
Excellent service and workmanship. We will use them again. They did a great job cleaning our warehouse floors and bathrooms and rollup doors. We will definitely use them again.
Response from the owner · 3 months ago
Hi Donny, thank you for the fantastic review! We’re glad your warehouse floors, bathrooms, and roll-up doors turned out great. Our team appreciates your trust, and we look forward to helping with your next commercial cleaning project. Until then, we’ll keep making dirt disappear! – Smart Team
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Carol S. Nasr3 reviewsiTotal number of Google reviews Carol has written across all businesses on Google Maps, not just this one.
I worked with Smart Janitorial for our church's cleaning service. My account representative was Ashana. She is quick to respond and take care of any complaints or changes needed. I am happy with the work performed. I will continue to work with Smart Janitorial in the future and would recommend them for commercial work.
Response from the owner · 3 months ago
Hi Carol, thank you for taking the time and leaving a kind review. It means a lot to our whole team. We are glad Ashana has been quick to help and that you are happy with the commercial cleaning at your church. We truly appreciate your trust and look forward to working with you for many years. – Smart Team
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edward mondorf2 reviewsiTotal number of Google reviews edward has written across all businesses on Google Maps, not just this one.
We are extremely pleased with the janitorial services provided for our clinic . Their team is consistently professional , reliable and thorough , ensuring our facility is always spotless , sanitized and welcoming for both patients and staff. We highly recommend their cleaning services to any healthcare facility or business looking for exceptional quality and dependable service .
Response from the owner · 3 months ago
Edward, thank you for sharing your experience with us. We’re grateful for the opportunity to service your clinic and help maintain a spotless, sanitized, and welcoming environment for your patients and staff. Your trust and recommendation mean a great deal to our entire team. We appreciate it. - Smart Team
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NAE RI LEE [CODY 3지국]1 reviewiTotal number of Google reviews NAE has written across all businesses on Google Maps, not just this one.
Our company recently hired Smart Janitorial for cleaning service, and the results exceeded our expectations. My account representative, Lou Machos, demonstrated exceptional care and ensured every detail was addressed. The standout feature for us was their fast response, prompt service, kindness, and professionalism, which made a significant difference. We’re delighted with the outcome and confidently recommend Smart Janitorial for any commercial service needs.
Response from the owner · 3 months ago
Thank you so much for your thoughtful review and recommendation! We’re thrilled to hear that our fast response, prompt service, and attention to detail exceeded your expectations. Lou and the entire Smart team truly appreciate your recognition, Reviews like this keep our staff working. Thank you - Smart Team
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Mayra Sorto2 reviewsiTotal number of Google reviews Mayra has written across all businesses on Google Maps, not just this one.
Highly recommend Smart Janitorial for commercial cleaning. We recently started using Smart Janitorial for our office cleaning service, and the experience has been seamless. Our account representative, Rivail, has been fantastic to work with. Even though we are early in our service, the quality and professionalism have exceeded expectations. We plan to continue our partnership with them long-term.
Response from the owner · 3 months ago
Thank you, Mayra! These reviews mean the world to our team. We’re so glad to hear your office cleaning service has been seamless so far and that Rivail has provided a great experience. We appreciate your trust in Smart Janitorial and look forward to continuing to support your team long-term. - Smart Janitorial Team
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Natasha Fields1 reviewiTotal number of Google reviews Natasha has written across all businesses on Google Maps, not just this one.
I would highly recommend this company! Issac is my consultant and he is very thorough, they scheduled my office cleaning very quickly. The cleaning they performed was top tier. 10/10!
Thank you, Natasha! We appreciate your review and are glad Issac was thorough and quick. Marisela and our cleaners appreciate the opportunity to work with your team. Reviews like this make all the difference for our company. Thank you - Smart Team
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Charlotte Ali2 reviewsiTotal number of Google reviews Charlotte has written across all businesses on Google Maps, not just this one.
Thank you for the fantastic job you did on our cleaning service. Lou and his team were excellent to work with, ensuring that all of my specific requirements were met during our seamless walkthrough.
We appreciate your hard work and look forward to continuing our business relationship with you.
Response from the owner · 5 months ago
Thank you, Charlotte, for your kind words and 5-star review! We’re so glad to hear that Lou and the team did a fantastic job. We appreciate you trusting Smart Janitorial with your cleaning needs. Reviews like this keep our team working.
Thank you - Smart Team
