170 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Groton: Renewal by Andersen Window Replacement, CR Score 61/100; 4.9★ from 3,951 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Window Nation, posts 24/7 hours; ranked #2 of 170.
Most-reviewed: Window Nation, 1,100 Google reviews at 4.8★, the most of 170 ranked after Renewal by Andersen Window Replacement; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
170 Groton window installers are ranked here by CR Score, from ten published factors. 37 are open 24/7, 105 open Saturdays and 59 open Sundays, based on posted hours. The median Google rating is 4.9★ across 170 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Renewal by Andersen Window Replacement | 61 | 4.9★ (3,951) | Middletown, 36 mi away | Sat · Sun · Evenings | Overall |
| 2 | Window Nation | 60 | 4.8★ (1,100) | Wallingford, 38 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Henderson Roofing | 59 | 5.0★ (430) | Groton | 24/7 | — |
| 4 | Murphy's Building & Remodeling LLC | 57 | 5.0★ (30) | Glastonbury, 13 mi away | Sat · Sun · Evenings | — |
| 5 | Henderson Roofing | 57 | 4.9★ (622) | Westerly, 13 mi away | 24/7 | — |
| 6 | Express Kitchens: New London | 56 | 4.5★ (64) | New London, 2 mi away | Sat | — |
| 7 | Pawcatuck Roofing Company Inc. | 56 | 4.9★ (207) | Pawcatuck, 11 mi away | 24/7 | — |
| 8 | MT Home Remodeling | 56 | 4.9★ (35) | New London, 1 mi away | — | — |
| 9 | Window Technologies | 55 | 5.0★ (16) | Canton, 22 mi away | Sat · Sun | — |
| 10 | Renewal by Andersen - Branford | 55 | 4.9★ (256) | Branford, 39 mi away | Sat · Evenings | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and review volume: 4.9★ from 3,951 Google reviews, the most in Groton.
Based in Wallingford, 38 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 1,100 Google reviews, listed on Google as “Window installation service”.
Based in Groton
Ranked #3 because of its Google rating and review volume: 5.0★ from 430 Google reviews.
Based in Glastonbury, 13 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Window installation service”.
Based in Westerly, 13 mi away
Ranked #5 because of its Google rating and review volume: 4.9★ from 622 Google reviews.
Based in New London, 2 mi away
Ranked #6 because of its Google rating and trade focus: 4.5★ from 64 Google reviews, listed on Google as “Window installation service”.
Based in Pawcatuck, 11 mi away
Ranked #7 because of its Google rating and review volume: 4.9★ from 207 Google reviews.
Based in New London, 1 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Window installation service”.
Based in Canton, 22 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Window installation service”.
Based in Branford, 39 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 256 Google reviews, listed on Google as “Window installation service”.
Based in Groton
Ranked #11 because of its Google rating and availability: 4.9★ from 37 Google reviews, open 24/7.
Based in Waterford, 7 mi away
Ranked #12 because of its Google rating and review volume: 4.9★ from 69 Google reviews.
Based in Groton
Ranked #13 because of its Google rating and review volume: 5.0★ from 66 Google reviews.
Based in Hebron, 27 mi away
Ranked #14 because of its Google rating and review volume: 4.8★ from 521 Google reviews.
Based in Portland, 33 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 84 Google reviews, listed on Google as “Roofing contractor”.
Based in Plainfield, 24 mi away
Ranked #16 because of its Google rating and review volume: 5.0★ from 377 Google reviews.
Based in Ledyard, 3 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Window installation service”.
Based in Groton
Ranked #18 because of its Google rating and trade focus: 4.1★ from 23 Google reviews, listed on Google as “Window installation service”.
Based in Branford, 35 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 128 Google reviews, listed on Google as “Window installation service”.
Based in Norwich, 11 mi away
Ranked #20 because of its Google rating and availability: 4.8★ from 49 Google reviews, open 24/7.
Based in Cromwell, 37 mi away
Ranked #21 because of its Google rating and review volume: 4.9★ from 800 Google reviews.
Based in Kensington, 39 mi away
Ranked #22 because of its Google rating and review volume: 4.9★ from 584 Google reviews.
Based in East Hartford, 39 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Window installation service”.
Based in Ledyard, 10 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 44 Google reviews, listed on Google as “Gutter cleaning service”.
Based in Manchester, 39 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 356 Google reviews, listed on Google as “Window installation service”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 170 ranked window installers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Castle Windows | 53 | 4.4★ (327) | 38 mi |
| 27 | Henderson Roofing | 53 | 5.0★ (46) | 18 mi |
| 28 | Wollman Building & Remodeling | 52 | 4.2★ (10) | 37 mi |
| 29 | Guaranteed Roofing | 52 | 4.9★ (261) | 24 mi |
| 30 | Clinton Glass | 52 | 4.3★ (48) | 23 mi |
| 31 | Red Dog's Roofing | 52 | 4.6★ (9) | In Groton |
| 32 | GW Nash Home Improvement | 52 | 4.3★ (3) | 11 mi |
| 33 | Handyman Services of CT LLC | 52 | 3.5★ (13) | In Groton |
| 34 | Auto Glass Dynamics | 52 | 4.5★ (17) | 25 mi |
| 35 | North Shore Remodeling LLC | 52 | 5.0★ (4) | 37 mi |
| 36 | Danielson Glass & Mirror | 52 | 4.7★ (42) | 32 mi |
| 37 | A1 Home Improvement | 52 | 4.9★ (88) | 16 mi |
| 38 | Christopher Home Improvement | 52 | 4.9★ (143) | 12 mi |
| 39 | Wise Handyman Services LLC | 52 | 4.7★ (51) | 37 mi |
| 40 | Stu Grant Windows | 51 | 5.0★ (10) | 38 mi |
| 41 | Middlesex Window & Door | 51 | 5.0★ (23) | 37 mi |
| 42 | CT Gutter | 51 | 4.9★ (160) | 37 mi |
| 43 | Neil Jones Home Improvements | 51 | 4.8★ (23) | 24 mi |
| 44 | Brewster Home Improvement LLC | 51 | 5.0★ (11) | 2 mi |
| 45 | Shoreline Glass & Aluminum | 51 | 5.0★ (24) | 38 mi |
| 46 | Sea Glass Window Washing | 51 | 4.9★ (35) | 6 mi |
| 47 | Windor Inc | 51 | 4.3★ (12) | 24 mi |
| 48 | Precise Home Services, LLC | 51 | 5.0★ (46) | 37 mi |
| 49 | Express Kitchens: Hamden | 51 | 4.5★ (22) | 35 mi |
| 50 | Bill's Home Repair | 51 | 5.0★ (3) | 33 mi |
20 more window installers within 40 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Advanced Construction | 4.7★ (3) | In Groton |
| BLM Construction LLC | 2.0★ (2) | 34 mi |
| Building Logistics LLC | 5.0★ (2) | In Groton |
| C & M Construction LLC | 5.0★ (2) | 38 mi |
| Carlos Remodeling Team,LLC | In Groton | |
| Coffey Construction Company | 5.0★ (1) | In Groton |
| CRV Home Remodeling LLC | 5.0★ (2) | In Groton |
| High Definition Window Cleaning | 5.0★ (1) | In Groton |
| ICOR Building & Remodeling | 5.0★ (64) | In Groton |
| JRX CONSTRUCTION LLC | 5.0★ (2) | In Groton |
| LUCERO GENERAL CONTRACTOR LlC | 5.0★ (1) | In Groton |
| Marchal Handyman LLC | 4.9★ (14) | In Groton |
| Michael Williams Siding and Windows | In Groton | |
| Mohawk Northeast Inc | 4.6★ (31) | In Groton |
| Mum City Windows | 5.0★ (2) | 38 mi |
| piton renovations inc | 4.5★ (2) | 4 mi |
| RPD Construction LLC - Home Improvement Contractor | 5.0★ (2) | 19 mi |
| Thames River Remodeling | 4.8★ (24) | In Groton |
| Tiderise Roof Co. | 5.0★ (1) | In Groton |
| W. Orkney Windows, Siding, & Roofing | 5.0★ (2) | 8 mi |
Typical prices in USD, adjusted for Connecticut with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | $3,410 | $7,300 | $11,760 | Per project (several windows): typical range of customer-reported projects. US national range × 0.99 New England factor (2025 Cost vs. Value Report) | October 2026 |
We scored 170 Groton window installers on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Groton data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |