21 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Sterling: American Quality Windows Inc, CR Score 87/100; 4.7★ from 49 Google reviews; open 7 days a week.
Most-reviewed: Sedlock Construction, 289 Google reviews at 5.0★, the most of 21 ranked; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
21 Sterling window installers are ranked here by CR Score, from 8 published factors. 8 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.5★ across 21 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | American Quality Windows Inc | 87 | 4.7★ (49) | Sterling | Sat · Sun · Evenings | Overall |
| 2 | Hartz Lock Co. | 78 | 4.8★ (97) | Clinton, 26 mi away | — | — |
| 3 | Elite Painting and Renovation | 77 | 4.7★ (15) | Sterling | Sat · Sun · Evenings | — |
| 4 | Grand Openings & Pete Glass Co. | 75 | 3.5★ (11) | Clinton, 25 mi away | — | — |
| 5 | Two Brothers Roofing | 75 | 4.9★ (35) | East Moline, 37 mi away | Sat · Sun · Evenings | — |
| 6 | JBM Construction Inc | 74 | 5.0★ (5) | Hanover Park, 25 mi away | Sat | — |
| 7 | B&A Glass Co. | 74 | 3.8★ (13) | Rock Falls, 2 mi away | — | — |
| 8 | Sedlock Construction | 73 | 5.0★ (289) | Colona, 35 mi away | — | Most reviews |
| 9 | Fix a Quack | 73 | 5.0★ (11) | Dixon, 11 mi away | — | — |
| 10 | Hiester Construction, Inc. | 73 | 4.4★ (35) | Freeport, 35 mi away | Sat · Sun · Evenings | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.7★ from 49 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clinton, 26 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 97 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sterling
Ranked #3 because of its Google rating and availability: 4.7★ from 15 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clinton, 25 mi away
Ranked #4 because of its Google rating and trade focus: 3.5★ from 11 Google reviews, listed on Google as “Window installation service”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in East Moline, 37 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 35 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hanover Park, 25 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rock Falls, 2 mi away
Ranked #7 because of its Google rating and trade focus: 3.8★ from 13 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Colona, 35 mi away
Ranked #8 because of its Google rating and review volume: 5.0★ from 289 Google reviews, the most Google reviews on this list (289).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Dixon, 11 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Roofing contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Freeport, 35 mi away
Ranked #10 because of its Google rating and availability: 4.4★ from 35 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Moline, 28 mi away
Ranked #11 because of its Google rating and trade focus: 1.0★ from 3 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in South Beloit, 25 mi away
Ranked #12 because of its Google rating and trade focus: 4.7★ from 6 Google reviews, listed on Google as “Roofing contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Geneseo, 33 mi away
Ranked #13 because of its Google rating and review volume: 4.6★ from 21 Google reviews, 21 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Freeport, 34 mi away
Ranked #14 because of its Google rating and review volume: 4.5★ from 19 Google reviews, 19 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Dixon, 12 mi away
Ranked #15 because of its Google rating and review volume: 4.2★ from 26 Google reviews, 26 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Freeport, 35 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Freeport, 36 mi away
Ranked #17 because of its Google rating and review volume: 4.5★ from 87 Google reviews, 87 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rock Falls, 4 mi away
Ranked #18 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Roofing contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clinton, 28 mi away
Ranked #19 because of its Google rating and trade focus: 3.9★ from 7 Google reviews, listed on Google as “Landscaper”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rock Falls, 5 mi away
Ranked #20 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Roofing contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mendota, 34 mi away
Ranked #21 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “Roofing contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
14 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 |
|---|---|---|
| Boss Roofing - Siding Experts | 4.8★ (517) | In Sterling |
| Camanche Siding & Windows | 2.0★ (2) | 29 mi |
| CB Construction & Remodeling, Inc | 5.0★ (2) | 25 mi |
| Country View Siding and Windows | 30 mi | |
| G F Siding & Windows | 35 mi | |
| Greenlink Energy Solutions | 38 mi | |
| JC Beaman Roofing & Home Improvement | 1.0★ (1) | 39 mi |
| JFaur Construction | 29 mi | |
| Madison Glass and Window | 5.0★ (2) | 25 mi |
| Patriot Systems, LLC | 33 mi | |
| Princeton Siding & Windows | 31 mi | |
| Raintree Siding and Windows | 38 mi | |
| Total Construction Services, TCS | 5.0★ (148) | In Sterling |
| Ugarph Siding & Windows | 5.0★ (2) | 26 mi |
Typical prices in USD, adjusted for Illinois with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | $3,430 | $7,340 | $11,830 | Per project (several windows): typical range of customer-reported projects. US national range × 1.00 East North Central factor (2025 Cost vs. Value Report) | October 2026 |
We scored 21 Sterling window installers on 8 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. Unknown factors are left out of the score, 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 Sterling data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |