Window cleaning service · South Lake Tahoe, CA · reviewed since 2018
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%100+58.7Reliability 26%99+25.8Value 15%100+15.2Experts Score= 100Not 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.100SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#1 of 67 commercial cleaning servicesiPosition by Experts Score among all companies we track in this category. · better than 100%
5.0★★★★★205 Google reviews · 24 photos
100%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.
Google reviewers rate A-1 Window Cleaning five stars based on two hundred and five reviews, with the owner responding to thirty-five percent of them. Customers frequently cite punctuality, professional communication, and reasonable pricing as key benefits of the service. The team is described as thorough and friendly, handling difficult angles and cleaning windows, screens, frames, and gutters effectively. Long-term clients highlight reliability and attention to detail, while no common criticisms appear in the provided excerpts.
Google rating: 5.0 out of 5 from 205 reviews (100% five-star).
Reviews on this page: 205 Google reviews (188 with written comments, 4 with photos).
Owner responses: the business replied to 35% of reviews.
Most recent review: October 7, 2026.
Service: Commercial Cleaning Service serving South Lake Tahoe, California.
Data from Google, last updated November 10, 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: satisfaction and craft & service; weakest: reliability.
A-1 Window CleaningCommercial 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.A-1 Window Cleaning: 100/100 on this factor. Category median: 91.A
100
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.A-1 Window Cleaning: 99/100 on this factor. Category median: 89.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.A-1 Window Cleaning: 100/100 on this factor. Category median: 98.A
100
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.A-1 Window Cleaning: 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.A-1 Window Cleaning: 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: 61.–
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Bar = this company · dark tick = category median.
Star ratings
205 Google reviews we collected
5.0of 5
5 stars205100%
4 stars00%
3 stars00%
2 stars00%
1 star00%
Praise vs complaints
Phrases our text analysis found in 188 written reviews
99%praise
Praise34999%
Complaints41%
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 price529%
Reasonable1271%
Overpriced00%
Not sure00%
Topic share
How often each topic comes up in the written reviews
7topics
Quality & results11031%
Would recommend6418%
Staff & attitude5917%
Speed & response5415%
Price & value298%
Honesty & trust195%
Communication185%
What customers talk about
We read 188 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“They always arrive on time, do a great job, and clean up before they leave.”
“Definitely will be using them again and highly recommend them.”
“You did a fantastic job; I can't recommend you enough!”
“He is professional, punctual, friendly, and pays great attention to detail.”
“He was very friendly, efficient, and worked hard to be sure it was done perfectly.”
“His prices are very reasonable, especially considering the excellent quality of his job.”
“It’s rare to find someone so reliable and dedicated to excellent customer service.”
“He was Pleasant, professional and communicated well.”
“We have a three-story home in upper Kingsbury with windows that are hard to reach, and he came on an extremely windy day.”
People customers mention
Josh63 reviews
Summer16 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Reviews for your job
Customers hired A-1 Window Cleaning for 4 kinds of job. Pick one to see what they paid and said.
Stephen2 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 a month ago★★★★★
I have been using A-1 Window Cleaning for about 20 years. On my own house and construction cleaning. Josh is dependable and gets the job done.
MeganLocal Guide · 21 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★★★★★
Josh and Isaiah did a spectacularjob in our windows. I'd have them back in a heartbeat!
kelly5 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★★★★★
A1 window cleaning is by far the best around South lake Tahoe. The two-person team was excellent. Very good quality control. Very friendly and a pleasure to work with
Great priceInterior & exterior window cleaning
Ophelia9 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★★★★★
Speedy and detailed work. Clean and professional. Thank you for a great job done!
Great priceInterior & exterior window cleaning
Julie1 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. · 2 months ago★★★★★
A-1 has cleaned our windows for over 5 years. They always arrive on time, do a great job, and clean up before they leave. Still have very reasonable prices. We will continue to make them our go to window cleaners.
Rick4 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 months ago★★★★★
Excellent window cleaning inside and out. They are so clean, it’s like the windows aren’t even there!
A1 window cleaning is by far the best around South lake Tahoe. The two-person team was excellent. Very good quality control. Very friendly and a pleasure to work with
Price assessment: Great price
Services: Interior & exterior window cleaning
Ophelia9 reviewsiTotal number of Google reviews Ophelia has written across all businesses on Google Maps, not just this one.
A-1 has cleaned our windows for over 5 years. They always arrive on time, do a great job, and clean up before they leave. Still have very reasonable prices. We will continue to make them our go to window cleaners.
Stephen SkaggsLocal Guide · 17 reviewsiTotal number of Google reviews Stephen has written across all businesses on Google Maps, not just this one.