450 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Thornton: Renewal by Andersen Window Replacement, CR Score 64/100; 4.8★ from 6,481 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Remod Exteriors, posts 24/7 hours; ranked #5 of 450.
Most-reviewed: Power Home Remodeling, 3,651 Google reviews at 4.4★, the most of 450 ranked after Renewal by Andersen Window Replacement; ranked #22.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
450 Thornton window installers are ranked here by CR Score, from ten published factors. 38 are open 24/7, 231 open Saturdays and 97 open Sundays, based on posted hours. The median Google rating is 4.8★ across 450 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Renewal by Andersen Window Replacement | 64 | 4.8★ (6,481) | Denver, 11 mi away | Sat · Sun · Evenings | Overall |
| 2 | Ameritech Windows | 62 | 4.7★ (849) | Denver, 4 mi away | Sat · Sun · Evenings | — |
| 3 | Lifetime Home Remodeling Denver (Windows, Siding, Bath) | 61 | 4.6★ (1,327) | Denver, 8 mi away | Sat · Sun · Evenings | — |
| 4 | Greenlight Fencing & Windows | 60 | 5.0★ (91) | Broomfield, 1 mi away | Sat · Sun · Evenings | — |
| 5 | Remod Exteriors | 60 | 5.0★ (50) | Arvada, 5 mi away | 24/7 | Emergencies |
| 6 | 303 WINDOWS | 60 | 5.0★ (250) | Denver, 13 mi away | Sat · Sun · Evenings | — |
| 7 | Window Nation | 60 | 4.5★ (339) | Aurora, 13 mi away | 24/7 | — |
| 8 | Deja View Window Washing | 60 | 4.9★ (516) | Arvada, 7 mi away | 24/7 | — |
| 9 | One Clear Choice Garage Doors | 60 | 4.9★ (1,117) | Loveland, 39 mi away | 24/7 | — |
| 10 | One Clear Choice Garage Doors Commerce City | 60 | 4.9★ (2,466) | Commerce City, 6 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 review volume: 4.8★ from 6,481 Google reviews, the most in Thornton.
Based in Denver, 4 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 849 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 8 mi away
Ranked #3 because of its Google rating and trade focus: 4.6★ from 1,327 Google reviews, listed on Google as “Window installation service”.
Based in Broomfield, 1 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 91 Google reviews, listed on Google as “Window installation service”.
Based in Arvada, 5 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 13 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 250 Google reviews, listed on Google as “Window installation service”.
Based in Aurora, 13 mi away
Ranked #7 because of its Google rating and trade focus: 4.5★ from 339 Google reviews, listed on Google as “Window installation service”.
Based in Arvada, 7 mi away
Ranked #8 because of its Google rating and review volume: 4.9★ from 516 Google reviews.
Based in Loveland, 39 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 1,117 Google reviews, listed on Google as “Window installation service”.
Based in Commerce City, 6 mi away
Ranked #10 because of its Google rating and review volume: 4.9★ from 2,466 Google reviews.
Based in Aurora, 23 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 173 Google reviews, listed on Google as “Window installation service”.
Based in Englewood, 17 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 261 Google reviews, listed on Google as “Window installation service”.
Based in Brighton, 13 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 461 Google reviews, listed on Google as “Window installation service”.
Based in Castle Rock, 32 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 480 Google reviews, listed on Google as “Window installation service”.
Based in Englewood, 15 mi away
Ranked #15 because of its Google rating and trade focus: 4.7★ from 1,027 Google reviews, listed on Google as “Window installation service”.
Based in Sheridan, 16 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 197 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 9 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 94 Google reviews, listed on Google as “Window installation service”.
Based in Longmont, 20 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 624 Google reviews, listed on Google as “Window installation service”.
Based in Broomfield, 8 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 378 Google reviews, listed on Google as “Window installation service”.
Based in Westminster, 4 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 534 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 4 mi away
Ranked #21 because of its Google rating and review volume: 4.8★ from 1,037 Google reviews.
Based in Centennial, 20 mi away
Ranked #22 because of its Google rating and trade focus: 4.4★ from 3,651 Google reviews, listed on Google as “Window installation service”.
Based in Denver, 14 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 157 Google reviews, listed on Google as “Window installation service”.
Based in Littleton, 17 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 130 Google reviews, listed on Google as “Window installation service”.
Based in Longmont, 24 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 357 Google reviews, listed on Google as “Window installation service”.
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 450 Thornton 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 Thornton 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 |