175 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lake Saint Louis: Window Nation, CR Score 64/100; 4.8★ from 1,310 Google reviews; open 24/7.
Best for emergencies (open 24/7): Cardinal Contractors, posts 24/7 hours; ranked #11 of 175.
Most-reviewed: Renewal by Andersen, 1,985 Google reviews at 4.7★, the most of 175 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
175 Lake Saint Louis window installers are ranked here by CR Score, from ten published factors. 14 are open 24/7, 73 open Saturdays and 27 open Sundays, based on posted hours. The median Google rating is 4.8★ across 175 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Window Nation | 64 | 4.8★ (1,310) | Bridgeton, 19 mi away | 24/7 | Overall |
| 2 | Mad City Windows & Baths of St. Louis | 62 | 4.7★ (853) | Bridgeton, 15 mi away | Sat · Sun · Evenings | — |
| 3 | Midtown Home Improvements | 61 | 4.1★ (1,651) | Wentzville, 3 mi away | Sat · Sun · Evenings | — |
| 4 | Universal Windows Direct of St Louis | 60 | 4.7★ (554) | St. Louis, 20 mi away | Sat · Sun · Evenings | — |
| 5 | Stratum Structural Systems | 60 | 4.9★ (324) | Chesterfield, 13 mi away | Sat | — |
| 6 | Renewal by Andersen | 59 | 4.7★ (1,985) | Bridgeton, 17 mi away | — | Most reviews |
| 7 | Zen Windows of St. Louis | 59 | 5.0★ (197) | Ballwin, 15 mi away | Sat · Evenings | — |
| 8 | Window World of St. Louis | 59 | 4.6★ (919) | Saint Peters, 17 mi away | Sat | — |
| 9 | The Glass Guru | 59 | 4.9★ (184) | Wentzville, 1 mi away | — | — |
| 10 | Window Depot USA of St. Louis (XteriorPRO) | 58 | 5.0★ (222) | Saint Peters, 9 mi away | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.8★ from 1,310 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 15 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 853 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wentzville, 3 mi away
Ranked #3 because of its Google rating and trade focus: 4.1★ from 1,651 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 20 mi away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 554 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chesterfield, 13 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 324 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 17 mi away
Ranked #6 because of its Google rating and review volume: 4.7★ from 1,985 Google reviews, the most in Lake Saint Louis.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 15 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 197 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 17 mi away
Ranked #8 because of its Google rating and trade focus: 4.6★ from 919 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wentzville, 1 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 184 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 9 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 222 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 11 mi away
Ranked #11 because of its Google rating and review volume: 4.8★ from 634 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Weldon Spring, 8 mi away
Ranked #12 because of its Google rating and review volume: 4.8★ from 368 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Maryland Heights, 21 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 333 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 26 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 1,253 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in O'Fallon, 3 mi away
Ranked #15 because of its Google rating and trade focus: 4.6★ from 148 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 10 mi away
Ranked #16 because of its Google rating and trade focus: 4.6★ from 208 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 6 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 17 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 177 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 25 mi away
Ranked #19 because of its Google rating and trade focus: 4.3★ from 523 Google reviews, listed on Google as “Window installation service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Lake Saint Louis
Ranked #20 because of its Google rating and trade focus: 4.5★ from 15 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hazelwood, 21 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 76 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ballwin, 21 mi away
Ranked #22 because of its Google rating and review volume: 5.0★ from 1,075 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 31 mi away
Ranked #23 because of its Google rating and trade focus: 4.4★ from 204 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Warrenton, 7 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Window installation service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Saint Charles, 11 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 107 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#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 175 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.
Typical prices in USD, adjusted for Missouri with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | $3,550 | $7,580 | $12,220 | Per project (several windows): typical range of customer-reported projects. US national range × 1.03 West North Central factor (2025 Cost vs. Value Report) | October 2026 |
We scored 175 Lake Saint Louis 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 Lake Saint Louis 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 |