The Best Window Contractors in Walnut Creek, CA
We graded 10 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 7,692 Google reviews of 37 top-rated window contractors nationwide; 10 of them in Walnut Creek, CA. Updated November 1, 2026.
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Best window contractors in Walnut Creek for interior & exterior window cleaning
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Mt Diablo Window CleaningHow Job match is calculatedBuilt only from reviews Google tagged “Interior & exterior window cleaning”:Stars on this job 55%5.00★Number of such jobs 25%38Overall Experts Score 20%92Job match= 96Stars are pulled toward the category average (4.86★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.96
Mr. M Home ServicesHow Job match is calculatedBuilt only from reviews Google tagged “Interior & exterior window cleaning”:Stars on this job 55%5.00★Number of such jobs 25%7Overall Experts Score 20%99Job match= 83Stars are pulled toward the category average (4.86★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.83
Quicky Window Cleaning & Gutter CleaningHow Job match is calculatedBuilt only from reviews Google tagged “Interior & exterior window cleaning”:Stars on this job 55%4.67★Number of such jobs 25%12Overall Experts Score 20%96Job match= 72Stars are pulled toward the category average (4.86★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.72Job match = this company’s ★ on reviews Google tagged “Interior & exterior window cleaning” (shrunk toward the category average when there are few), how many such jobs it has done, and its overall Experts Score.
What customers said about interior & exterior window cleaning
Quicky Window Cleaning & Gutter C…Saw Matt, in the neighborhood and was impressed with the window cleaning process, especially when no one had to be on my tile roof. Windows are clear and tracks cleaned plus a few screens were replaced. Service was quick and efficient and no up sales were performed. Just hard working window and screen cleaning and…
Mt Diablo Window CleaningThe Mt.Diablo crew were here right on time and immediately went to work. They cleaned the outside, inside and all screens. Everything sparkled when they were finished! I'd be happy to hire them again for future annual window cleaning. They left me with a smile on my face and shining windows!
Mr. M Home ServicesHad an amazing experience with Mr. M Cleaning Services for window cleaning! They cleaned our windows, screens, and tracks inside and out, and did an absolutely incredible job.The team was highly professional, thorough, and efficient throughout the entire process. I will definitely use them again and highly recommend…
Quicky Window Cleaning & Gutter C…Super professional and nice guys to work with. The support is great for any issues along the way and the result or pristine!
Quicky Window Cleaning & Gutter C…I highly recommend Quicky Windows! The team arrived right on time, communicated clearly throughout the process, and worked incredibly hard. They cleaned both the inside and outside of the windows, as well as the sills and screens. I have a rather large house with a lot of windows and they took their time taking the…
Quicky Window Cleaning & Gutter C…They did my gutter cleaning and pressure washing and did a great job. They forgot equipment for the pressure washing so they couldn't do it the same day, but came back the next day (and expanded the scope to include my front patio at no extra charge)
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 window contractors).
| # | 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). |
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| 1 |  Aria Film SolutionsWalnut Creek, 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 69%99+68.5Reliability 31%98+30.2Experts Score= 99Not enough data for value, 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––A– | 5.00 | — |
| 2 | Mr. M Home ServicesWalnut Creek, 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 | — |
| 3 |  Ultra Window Tint N Auto Glass LLCWalnut Creek, 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 69%100+69.2Reliability 31%98+30.2Experts Score= 99Not enough data for value, 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––A– | 5.00 | — |
| 4 |  PAC Replacement Windows & DoorsWalnut Creek, 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%97+25.3Value 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 | — |
| 5 |  Stoneside Blinds & Shades Walnut CreekWalnut Creek, CA | A 98How 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 69%98+67.8Reliability 31%98+30.2Experts Score= 98Not enough data for value, 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––A– | 4.99 | — |
| 6 |  Den Defenders Window ScreensWalnut Creek, CA | A 98How 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 69%99+68.5Reliability 31%96+29.5Experts Score= 98Not enough data for value, 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––A– | 5.00 | — |
| 7 | Quicky Window Cleaning & Gutter CleaningWalnut Creek, CA | A 96How 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%96+56.3Reliability 26%95+24.8Value 15%100+15.2Experts Score= 96Not 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– | 4.97 | — |
| 8 |  Golden State Builders GroupWalnut Creek, CA | A 95How 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%96+25Value 15%78+11.9Experts Score= 95Not 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–BA– | 5.00 | — |
| 9 | Mt Diablo Window CleaningWalnut Creek, CA | A 92How 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%91+53.4Reliability 26%89+23.2Value 15%100+15.2Experts Score= 92Not 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– | 4.92 | — |
| 10 |  Best ExteriorsWalnut Creek, CA | A 88How 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%90+49.1Reliability 24%91+22.1Value 14%100+14.1Replies to reviews 7%100+7.1Craft & service penalty53−4.7Experts Score= 88Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AACAAA | 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”. |
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Window Contractors in Walnut Creek, CA at a glance
How the 10 window contractors we rated in Walnut Creek, CA compare, and what customers praise most.
Experts Score grades
A = score 80+, F = below 20.
- Grade A10100%
- Grade B00%
- Grade C00%
- Grade D00%
- Grade F00%
Google ratings
Average stars per company.
- 4.90★ and up990%
- 4.80–4.89★110%
- 4.60–4.79★00%
- Below 4.60★00%
What customers praise
Share of Google review highlights.
- Quality1,04223%
- Professionalism1,06323%
- Responsiveness88319%
- Punctuality90720%
- Value73216%
Was the price fair?
All price verdicts left with reviews.
- Great price32637%
- Reasonable43550%
- Overpriced496%
- Not sure678%
Price verdicts by year
Share calling it great / reasonable / overpriced.
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.