Analyzing 5,760,1035.8M ReviewsFor 15,83615.8K Experts
We graded 9 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 28,781 Google reviews of 124 top-rated house cleaning services nationwide; 9 of them in Groton, CT. Updated October 28, 2026.
Pick the job — we re-rank companies by how customers rated that exact job.
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 house cleaning services).
| # | 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 |  Mary's Cleaning Service CTGroton, CT | 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 59%99+58.1Reliability 26%97+25.3Value 15%95+14.5Experts 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. | AA–AA– | 5.00 | $375 |
| 2 |  Westerly HousekeepingGroton, CT | A 97How 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%98+57.5Reliability 26%96+25Value 15%100+15.2Craft & service penalty97−0.3Experts Score= 97Not 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– | 5.00 | — |
| 3 |  Cleaning GeniesGroton, CT | A 91How 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%92+22.3Value 14%100+14.1Replies to reviews 7%84+5.9Experts Score= 91Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AAA | 4.89 | $337 |
| 4 |  Perfect CleanGroton, CT | A 90How 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%90+52.8Reliability 26%86+22.4Value 15%100+15.2Experts Score= 90Not 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– | 4.90 | $350 |
| 5 |  Merry Maids of Eastern ConnecticutGroton, CT | 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 59%88+51.7Reliability 26%86+22.4Value 15%92+14Experts Score= 88Not 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– | 4.91 | $203 |
| 6 |  TRUEMAID CLEANINGGroton, CT | B 76How 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%82+44.7Reliability 24%89+21.6Value 14%55+7.8Replies to reviews 7%46+3.3Momentum penalty92−0.8Experts Score= 76Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–CAC | 4.84 | $224 |
| 7 |  Jac’s Cleaning ServiceGroton, CT | B 70How 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%75+40.9Reliability 24%63+15.3Value 14%100+14.1Replies to reviews 7%63+4.5Craft & service penalty83−1.7Momentum penalty70−3Experts Score= 70Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BBAABB | 4.79 | — |
| 8 |  Orchid Maids Cleaning ServiceGroton, CT | B 66How 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%73+39.8Reliability 24%71+17.2Value 14%87+12.3Replies to reviews 7%63+4.5Craft & service penalty68−3.2Momentum penalty49−5.1Experts Score= 66Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BBBACB | 4.77 | — |
| 9 |  Queen Bee Cleaning LLCGroton, CT | B 62How 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%66+36Reliability 24%49+11.9Value 14%81+11.5Replies to reviews 7%100+7.1Craft & service penalty79−2.1Momentum penalty72−2.8Experts Score= 62Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BCBABA | 4.70 | $453 |
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”. |
|---|---|---|---|---|
| Standard cleaning | $158 | $196 | $253 | 98% |
| Deep clean | $277 | $359 | $471 | 96% |
| General housekeeping | $153 | $189 | $240 | 97% |
| Moving-related cleaning | $321 | $403 | $536 | 95% |
| General carpet cleaning | $96 | $209 | $254 | 98% |
| Interior & exterior window cleaning | $227 | $309 | $398 | 98% |
| Carpet steam cleaning | $139 | $183 | $247 | 98% |
| Office & workplace cleaning | $153 | $189 | $283 | 97% |
| Upholstery cleaning | $151 | $224 | $285 | 99% |
| HVAC duct & vent cleaning | $466 | $614 | $767 | 100% |
| Move-out cleaning | $301 | $374 | $614 | 91% |
How the 9 house cleaning services we rated in Groton, CT compare, and what customers praise most.
A = score 80+, F = below 20.
Average stars per company.
Share of Google review highlights.
All price verdicts left with reviews.
Share calling it great / reasonable / overpriced.
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 10 best-rated house cleaning services in Groton, CT average 4.9★ on Google across 846 reviews. Mary's Cleaning Service CT has the top rating (5.0★), and Queen Bee Cleaning LLC has the most reviews (275). Updated October 28, 2026.
10 companies that meet our bar: rated 4.5★ or higher on Google, with a meaningful review history (846 reviews combined) and currently operating. Request a call back and the company will phone you directly.
“A few years ago, we had a professional cleaning company come out to do a deep tile clean on our kitchen floor. They told us beforehand that the clean may do some damage to the grout and it did. Today I used an Imop…” — Google review
“I want to give more than 5 stars. I needed my apartment cleaned after I moved out, 2 bed/ 2 bath 1250 sq ft. They showed up when they said they would, cleaned the whole place, appliances included, so well I thought…” — Google review
“Jac’s team did a great job! The walls look fresh, blinds were dusted, and the staff was friendly. Definitely will have them back!” — Google review
“We had this wonderful company come do a deep clean of our apartment (we’re first time parents so we let our cleaning duties get a bit behind 😬) they were on time and so very nice. When I came home everything was…” — Google review
“I am so impressed with the job that Liberty, Natalie and Sarah did today for our deep clean appointment! They were friendly, professional and left our house sparkling and spotless. We have three dogs and loved on…” — Google review
“"The cleaning was excellent! They both did a very thorough job and my home looked and smelled excellent when they were finished. We have two dogs and not a trace of dog hair was left when they finished. They wiped…” — Google review
“If I could do 10 stars I would! Erika's team does an excellent job, they're very thorough and so nice. It's been a real pleasure having them come by, eases our mental load each month and frees up our weekends from…” — Google review
“As always, they did a great job! But even more than being skilled and professional cleaners, they are just wonderful people.” — Google review
“Best cleaners I have ever used hands down. I had gotten a deep clean as a gift originally was so impressed continued to use and will continue” — Google review
“So worth the money! I scheduled a deep cleaning for my dad as a Father's Day gift, and he was thrilled with the result. It was very easy to book. They arrived right on time and were incredibly hardworking, kind, and…” — Google review
We scan Google Maps for house cleaning service listings in and around Groton, 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.
Mary's Cleaning Service CT has the highest Google rating on our Groton list: 5.0 out of 5 from 44 reviews (as of October 28, 2026).
Queen Bee Cleaning LLC has the most Google reviews among the companies listed here: 275, with a 4.7★ average.
Only open Groton-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.
Analyzing 5,760,1035.8M ReviewsFor 15,83615.8K Experts