18 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Peru: Koolmaster Co. Inc., CR Score 84/100; 4.5★ from 51 Google reviews; open Saturdays until 12:30 PM.
Most-reviewed: Elite Seamless Gutters, 94 Google reviews at 4.9★, the most of 18 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
18 Peru window installers are ranked here by CR Score, from 8 published factors. 6 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.7★ across 18 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Koolmaster Co. Inc. | 84 | 4.5★ (51) | La Salle, 2 mi away | Sat | Overall |
| 2 | The Glass Guy | 79 | 4.9★ (18) | Spring Valley, 4 mi away | — | — |
| 3 | Elite Seamless Gutters | 77 | 4.9★ (94) | Spring Valley, 4 mi away | — | Most reviews |
| 4 | Signa System Co | 77 | 5.0★ (5) | Darien, 37 mi away | Sat · Sun · Evenings | — |
| 5 | Escobedo Builders LLC | 76 | 5.0★ (6) | Peru | — | — |
| 6 | All Star Professional Home Services | 75 | 5.0★ (4) | Streator, 21 mi away | Sat | — |
| 7 | All Storm Solutions, Inc. | 73 | 4.8★ (84) | Naperville, 26 mi away | — | — |
| 8 | Exterior 1 | 72 | 4.6★ (9) | Sandwich, 32 mi away | Sat · Sun · Evenings | — |
| 9 | Ted’s Aluminum Siding & Windows | 72 | 4.5★ (4) | Ottawa, 15 mi away | — | — |
| 10 | Steinhour Construction | 71 | 4.2★ (5) | Ottawa, 29 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: 4.5★ from 51 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spring Valley, 4 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 18 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spring Valley, 4 mi away
Ranked #3 because of its Google rating and review volume: 4.9★ from 94 Google reviews, the most Google reviews on this list (94).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Darien, 37 mi away
Ranked #4 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 Peru
Ranked #5 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “General contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Streator, 21 mi away
Ranked #6 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 Naperville, 26 mi away
Ranked #7 because of its Google rating and review volume: 4.8★ from 84 Google reviews, 84 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sandwich, 32 mi away
Ranked #8 because of its Google rating and availability: 4.6★ from 9 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ottawa, 15 mi away
Ranked #9 because of its Google rating and trade focus: 4.5★ 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 Ottawa, 29 mi away
Ranked #10 because of its Google rating and availability: 4.2★ from 5 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Streator, 26 mi away
Ranked #11 because of its Google rating and review volume: 5.0★ from 11 Google reviews, 11 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Plano, 39 mi away
Ranked #12 because of its Google rating and review volume: 4.8★ from 83 Google reviews, 83 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spring Valley, 4 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 8 Google reviews, listed on Google as “Roofing contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sandwich, 37 mi away
Ranked #14 because of its Google rating and review volume: 4.6★ from 67 Google reviews, 67 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Peru
Ranked #15 because of its Google rating and review volume: 3.1★ from 15 Google reviews, 15 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mendota, 15 mi away
Ranked #16 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.
Based in Dixon, 40 mi away
Ranked #17 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 Rock Falls, 40 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.
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 |
|---|---|---|
| Augustyniak Construction, LLC | 4.8★ (16) | In Peru |
| B&B Remodeling Co | 3.0★ (1) | 2 mi |
| Brian Kuhne Carpentry LLC | 5.0★ (3) | In Peru |
| CAP Construction Services | 5.0★ (1) | 17 mi |
| D.C. Construction - Construction Company, Home Makeover Service, Small Bathroom Remodel | In Peru | |
| DLN Home Remodeling | 4.8★ (16) | In Peru |
| Gordon & Backhus Glass & Lock | 5.0★ (2) | 37 mi |
| Greater Midwest Exteriors - Morris | 5.0★ (1) | 37 mi |
| IV Construction, Inc. | 4.4★ (37) | In Peru |
| J. W. Woodworks | 17 mi | |
| John's Service and Sales, Inc. | 4.5★ (82) | In Peru |
| Limberg Builders | 4.9★ (22) | In Peru |
| MJB Contracting LLC | 4.0★ (2) | In Peru |
| Overhead Door Company of Illinois Valley | 4.5★ (25) | In Peru |
| P. L. S. Remodeling And Repairs - Rodney Seibert | 1.0★ (1) | 22 mi |
| Pinter General Contracting | 4 mi | |
| Salomon Remodeling LLC | 5.0★ (45) | In Peru |
| Spence Interior and Exterior Painting LLC | 3.4★ (8) | In Peru |
| Stuart Tree Services | 4.9★ (56) | In Peru |
| Top Builders | 3.0★ (1) | In Peru |
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 18 Peru 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 Peru 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 |