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Best Window Installers in Effingham, IL (2026)

5 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Effingham: A-1 Quality Glass Inc, CR Score 59/100; 4.9★ from 81 Google reviews; open Saturdays until 12 PM.

  2. 2

    Most-reviewed: Central Illinois Glass Cutters, 68 Google reviews at 4.9★, the most of 5 ranked after A-1 Quality Glass Inc; ranked #2.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

5 Effingham window installers are ranked here by CR Score, from ten published factors. 2 open Saturdays, based on posted hours. The median Google rating is 4.8★ across 5 rated businesses.

Most of this list also appears on the Window installers in Charleston ranking. See Window installers in Charleston

Top 5 window installers in Effingham at a glance

Top 5 window installers in Effingham at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1A-1 Quality Glass Inc594.9★ (81)Olney, 37 mi awaySatOverall
2Central Illinois Glass Cutters584.9★ (68)Mattoon, 25 mi away—Most reviews
3KAS Windows, LLC574.8★ (54)Mattoon, 26 mi away——
4Duncan Windows & Floors554.7★ (12)Mattoon, 27 mi awaySat—
5Redemption Roofing and Exteriors484.8★ (34)Douglas, 35 mi away——

The 5 best window installers in Effingham, ranked

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.

  1. Ranked #1 in Effingham

    #1 A-1 Quality Glass Inc

    Based in Olney, 37 mi away

    59/100CR Score

    Ranked #1 because of its Google rating and review volume: 4.9★ from 81 Google reviews, the most in Effingham.

    • 4.9★ from 81 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat 8 AM–12 PM · Sun closed
    Address
    1112 E Main St, Olney, IL 62450
    View profile for A-1 Quality Glass Inc(618) 395-4930

  3. #3 KAS Windows, LLC

    Based in Mattoon, 26 mi away

    57/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.8★ from 54 Google reviews, listed on Google as “Window installation service”.

    • 4.8★ from 54 Google reviews
    Hours
    Mon–Fri 9 AM–4 PM · Sat–Sun closed
    Address
    1321 Lake Land Blvd, Mattoon, IL 61938
    View profile for KAS Windows, LLC(217) 254-9941

  4. #4 Duncan Windows & Floors

    Based in Mattoon, 27 mi away

    55/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.7★ from 12 Google reviews, listed on Google as “Window installation service”.

    • 4.7★ from 12 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat 9 AM–1 PM · Sun closed
    Address
    920 Dewitt Ave, Mattoon, IL 61938
    View profile for Duncan Windows & Floors(217) 234-3485

How much do window installers cost in Effingham?

Typical prices in USD, adjusted for Illinois with a published regional index. Each row names its basis and month.

How much do window installers cost in Effingham?
JobLowTypicalHighBasisChecked
Window replacement$3,430$7,340$11,830Per 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

How we ranked Effingham window installers

We scored 5 Effingham 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Effingham data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

Window installers in Effingham: frequently asked questions

Who is the best window installer in Effingham?

By CR Score, the highest-ranked window installer in Effingham, IL is A-1 Quality Glass Inc with a CR Score of 59/100. It has 4.9★ from 81 Google reviews. It is open Saturdays until 12 PM. Central Illinois Glass Cutters (#2) and KAS Windows, LLC (#3) follow. We ranked 5 window installers on ten factors, last updated October 22, 2026.

Which window installers in Effingham work on weekends?

2 of 5 ranked window installers post Saturday hours. The highest-ranked open Saturdays are A-1 Quality Glass Inc (#1) and Duncan Windows & Floors (#4). Posted hours are office hours; crews may book weekend jobs separately.

How much does window replacement cost in Effingham?

Window replacement typically costs $3,430 to $11,830, with $7,340 typical (Per project (several windows): typical range of customer-reported projects. US national range × 1.00 East North Central factor (2025 Cost vs. Value Report)). The range is adjusted for Illinois. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Effingham window installers have?

The median Google rating among 5 rated window installers in Effingham is 4.8★, with a median of 54 reviews. A-1 Quality Glass Inc has the most, 81 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank window installers?

Each window installer gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Do window installers outside Effingham count in this ranking?

Yes, if they are within 40 mi of the Effingham city center, our service radius for window installers. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.

Can window installers pay to rank higher on ContractorsRanked?

No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.

Update log for Effingham

  1. October 2026: CR Scores recalculated for 5 window installers serving Effingham.

More window installers and Effingham pages