156 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lancaster: Paramount Windows & Doors, CR Score 91/100; 4.9★ from 95 Google reviews; open 24/7.
Best for emergencies (open 24/7): Wonder Windows Buffalo, posts 24/7 hours; ranked #2 of 156.
Most-reviewed: Renewal By Andersen of Western New York, 1,066 Google reviews at 4.8★, the most of 156 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
156 Lancaster window installers are ranked here by CR Score, from 8 published factors. 21 are open 24/7, 74 open Saturdays and 35 open Sundays, based on posted hours. The median Google rating is 4.9★ across 156 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Paramount Windows & Doors | 91 | 4.9★ (95) | Buffalo, 4 mi away | 24/7 | Overall |
| 2 | Wonder Windows Buffalo | 90 | 4.5★ (208) | Buffalo, 3 mi away | 24/7 | Emergencies |
| 3 | The Window Source of WNY | 88 | 4.9★ (53) | Buffalo, 10 mi away | 24/7 | — |
| 4 | Renewal By Andersen of Western New York | 87 | 4.8★ (1,066) | Depew, 3 mi away | Sat | Most reviews |
| 5 | Braymiller Builders of WNY Inc. | 87 | 4.9★ (1,065) | Hamburg, 15 mi away | Sat | — |
| 6 | Graves Brothers Home Improvement | 86 | 4.7★ (494) | Williamsville, 5 mi away | 24/7 | — |
| 7 | King Remodeling Corp roofing contractor | 85 | 5.0★ (177) | Buffalo, 9 mi away | 24/7 | — |
| 8 | William C Rott & Son Inc | 85 | 4.2★ (120) | Tonawanda, 12 mi away | 24/7 | — |
| 9 | All Access Builders LLC | 84 | 4.9★ (134) | Buffalo, 7 mi away | 24/7 | — |
| 10 | Express Windows | 84 | 4.7★ (318) | Buffalo, 12 mi away | Sat · 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 availability: 4.9★ from 95 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 3 mi away
Ranked #2 because of its Google rating and availability: 4.5★ from 208 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 10 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 53 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Depew, 3 mi away
Ranked #4 because of its Google rating and review volume: 4.8★ from 1,066 Google reviews, the most Google reviews on this list (1,066).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hamburg, 15 mi away
Ranked #5 because of its Google rating and review volume: 4.9★ from 1,065 Google reviews, 1,065 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Williamsville, 5 mi away
Ranked #6 because of its Google rating and availability: 4.7★ from 494 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 9 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 177 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Tonawanda, 12 mi away
Ranked #8 because of its Google rating and availability: 4.2★ from 120 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 7 mi away
Ranked #9 because of its Google rating and availability: 4.9★ from 134 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 12 mi away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 318 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cheektowaga, 5 mi away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 235 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 10 mi away
Ranked #12 because of its Google rating and availability: 4.8★ from 129 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 7 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 76 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lancaster
Ranked #14 because of its Google rating and availability: 4.9★ from 160 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 8 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 47 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in North Tonawanda, 13 mi away
Ranked #16 because of its Google rating and availability: 4.9★ from 80 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Welland, 31 mi away
Ranked #17 because of its Google rating and availability: 5.0★ from 64 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 12 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 468 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 33 mi away
Ranked #19 because of its Google rating and availability: 5.0★ from 65 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thorold, 32 mi away
Ranked #20 because of its Google rating and review volume: 5.0★ from 243 Google reviews, 243 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 8 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 27 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hamburg, 14 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 36 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Welland, 30 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 40 Google reviews, listed on Google as “Window installation service”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Norfolk County, 31 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 105 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Typical prices in USD, adjusted for New York with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | $3,730 | $7,980 | $12,860 | Per project (several windows): typical range of customer-reported projects. US national range × 1.09 Middle Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
We scored 156 Lancaster 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 Lancaster 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 |