396 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Longmont: One Clear Choice Garage Doors, CR Score 63/100; 4.9★ from 1,117 Google reviews; open 24/7.
Best for emergencies (open 24/7): Mike Garage Door Repair Fort Collins, posts 24/7 hours; ranked #7 of 396.
Most-reviewed: Renewal by Andersen Window Replacement, 6,481 Google reviews at 4.8★, the most of 396 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
396 Longmont window installers are ranked here by CR Score, from ten published factors. 36 are open 24/7, 204 open Saturdays and 92 open Sundays, based on posted hours. The median Google rating is 4.8★ across 396 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | One Clear Choice Garage Doors | 63 | 4.9★ (1,117) | Loveland, 18 mi away | 24/7 | Overall |
| 2 | BlueBird Windows & Doors | 62 | 4.9★ (624) | Longmont | Sat | — |
| 3 | Renewal by Andersen Window Replacement | 61 | 4.7★ (357) | Longmont | Sat · Sun · Evenings | — |
| 4 | Renewal by Andersen Window Replacement | 61 | 4.8★ (6,481) | Denver, 32 mi away | Sat · Sun · Evenings | Most reviews |
| 5 | Ameritech Windows | 59 | 4.7★ (849) | Denver, 25 mi away | Sat · Sun · Evenings | — |
| 6 | The Door Dudes | 58 | 5.0★ (81) | Longmont | Sat | — |
| 7 | Mike Garage Door Repair Fort Collins | 58 | 4.9★ (266) | Fort Collins, 25 mi away | 24/7 | Emergencies |
| 8 | Lifetime Home Remodeling Denver (Windows, Siding, Bath) | 58 | 4.6★ (1,327) | Denver, 30 mi away | Sat · Sun · Evenings | — |
| 9 | K&G Window Pros | 58 | 4.9★ (461) | Brighton, 21 mi away | Sun · Evenings | — |
| 10 | Columbus Tree & Handyman | 58 | 5.0★ (113) | Fort Collins, 32 mi away | 24/7 | — |
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 trade focus: 4.9★ from 1,117 Google reviews, listed on Google as “Window installation service”.
Based in Longmont
Ranked #2 because of its Google rating and trade focus: 4.9★ from 624 Google reviews, listed on Google as “Window installation service”.
Based in Longmont
Ranked #3 because of its Google rating and trade focus: 4.7★ from 357 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 32 mi away
Ranked #4 because of its Google rating and review volume: 4.8★ from 6,481 Google reviews, the most in Longmont.
Based in Denver, 25 mi away
Ranked #5 because of its Google rating and trade focus: 4.7★ from 849 Google reviews, listed on Google as “Window installation service”.
Based in Longmont
Ranked #6 because of its Google rating and trade focus: 5.0★ from 81 Google reviews, listed on Google as “Window installation service”.
Based in Fort Collins, 25 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 266 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 30 mi away
Ranked #8 because of its Google rating and trade focus: 4.6★ from 1,327 Google reviews, listed on Google as “Window installation service”.
Based in Brighton, 21 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 461 Google reviews, listed on Google as “Window installation service”.
Based in Fort Collins, 32 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 113 Google reviews, listed on Google as “Window installation service”.
Based in Broomfield, 23 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 91 Google reviews, listed on Google as “Window installation service”.
Based in Fort Collins, 29 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 154 Google reviews, listed on Google as “Window installation service”.
Based in Arvada, 26 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Window installation service”.
Based in Broomfield, 17 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 378 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 35 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 250 Google reviews, listed on Google as “Window installation service”.
Based in Arvada, 26 mi away
Ranked #16 because of its Google rating and review volume: 4.9★ from 516 Google reviews.
Based in Loveland, 17 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 452 Google reviews, listed on Google as “Window installation service”.
Based in Aurora, 33 mi away
Ranked #18 because of its Google rating and trade focus: 4.5★ from 339 Google reviews, listed on Google as “Window installation service”.
Based in Commerce City, 28 mi away
Ranked #19 because of its Google rating and review volume: 4.9★ from 2,466 Google reviews.
Based in Brighton, 19 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 189 Google reviews, listed on Google as “Window installation service”.
Based in Fort Collins, 32 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 48 Google reviews, listed on Google as “Window installation service”.
Based in Englewood, 37 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 261 Google reviews, listed on Google as “Window installation service”.
Based in Longmont
Ranked #23 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “Window installation service”.
Based in Longmont
Ranked #24 because of its Google rating and review volume: 4.9★ from 715 Google reviews.
Based in Fort Collins, 24 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 487 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 396 ranked window installers here; the rest are on their profiles.
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 |
|---|---|---|
| A Better Garage Door - Longmont | 5.0★ (148) | In Longmont |
| BC Home Services | 5.0★ (13) | In Longmont |
| Best Remodel | In Longmont | |
| Black Mountain Construction Company | 5.0★ (1) | In Longmont |
| Busy Bear LLC | In Longmont | |
| Carlos Martinez Painting | 5.0★ (85) | In Longmont |
| Carroll Mechanical Services | 4.8★ (77) | In Longmont |
| CertaPro Painters® of Boulder and Longmont | 4.9★ (121) | In Longmont |
| Clearview Windows & Siding Llc | 5.0★ (2) | 18 mi |
| D&D Designs | 5.0★ (2) | 18 mi |
| EMG Windows And Doors | 5.0★ (2) | 20 mi |
| Environmental Systems Design | 5.0★ (2) | In Longmont |
| European Windows and Doors | 3.5★ (2) | In Longmont |
| Four Seasons Sunrooms | In Longmont | |
| Longmont Roofing Windsor | 1.0★ (1) | In Longmont |
| Mountain Valley Plumbing and Heating | 4.9★ (724) | In Longmont |
| Siding Design Pro & SDP Renovation | 5.0★ (33) | In Longmont |
| Summit Tree Care LLC | 4.9★ (64) | In Longmont |
| Sunray Roofing and Solar | 5.0★ (6) | In Longmont |
| The Insulation Guys | 4.8★ (23) | In Longmont |
Typical prices in USD, adjusted for Colorado with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | $3,290 | $7,050 | $11,350 | Per project (several windows): typical range of customer-reported projects. US national range × 0.96 Mountain factor (2025 Cost vs. Value Report) | October 2026 |
We scored 396 Longmont 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 Longmont 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 |