591 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Green Valley: Quality Window & Glass Repair LLC, CR Score 64/100; 5.0★ from 392 Google reviews; open 24/7.
Best for emergencies (open 24/7): Safety Glass Repair, posts 24/7 hours; ranked #2 of 591.
Most-reviewed: Window Nation, 4,186 Google reviews at 4.7★, the most of 591 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
591 Green Valley window installers are ranked here by CR Score, from ten published factors. 109 are open 24/7, 391 open Saturdays and 216 open Sundays, based on posted hours. The median Google rating is 4.9★ across 591 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Quality Window & Glass Repair LLC | 64 | 5.0★ (392) | Germantown, 10 mi away | 24/7 | Overall |
| 2 | Safety Glass Repair | 62 | 5.0★ (165) | Gaithersburg, 11 mi away | 24/7 | Emergencies |
| 3 | Kennedy Locksmith | 62 | 4.9★ (980) | Aspen Hill, 27 mi away | 24/7 | — |
| 4 | Window Nation | 61 | 4.7★ (4,186) | Glen Burnie, 36 mi away | 24/7 | Most reviews |
| 5 | Renewal by Andersen of the Capital Region | 61 | 4.9★ (1,041) | North Bethesda, 21 mi away | Sat · Sun | — |
| 6 | Zen Windows Washington DC | 60 | 5.0★ (119) | Washington, D.C., 21 mi away | 24/7 | — |
| 7 | KELEMER BROTHERS REPLACEMENT WINDOWS | 60 | 5.0★ (416) | Silver Spring, 25 mi away | Sat · Sun · Evenings | — |
| 8 | Auto Glass Experts | 60 | 5.0★ (50) | Aspen Hill, 12 mi away | 24/7 | — |
| 9 | Kennedy Glass in DC | 60 | 4.9★ (382) | Washington, D.C., 31 mi away | 24/7 | — |
| 10 | Rockville Auto Glass Replacement | 59 | 4.9★ (231) | Darnestown, 18 mi away | Sat · Sun · Evenings | — |
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: 5.0★ from 392 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Gaithersburg, 11 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 165 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Aspen Hill, 27 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 980 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glen Burnie, 36 mi away
Ranked #4 because of its Google rating and review volume: 4.7★ from 4,186 Google reviews, the most in Green Valley.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Bethesda, 21 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 1,041 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Washington, D.C., 21 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 119 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Silver Spring, 25 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 416 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Aspen Hill, 12 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Washington, D.C., 31 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 382 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darnestown, 18 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 231 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Gaithersburg, 12 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 45 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arbutus, 35 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 1,036 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in College Park, 28 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 159 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Washington, D.C., 23 mi away
Ranked #14 because of its Google rating and review volume: 4.9★ from 3,700 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Washington, D.C., 32 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 107 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Catonsville, 31 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 97 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Damascus, 3 mi away
Ranked #17 because of its Google rating and review volume: 5.0★ from 263 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Washington, D.C., 34 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 101 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Washington, D.C., 31 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 116 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Frederick, 7 mi away
Ranked #20 because of its Google rating and review volume: 5.0★ from 303 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fairfax, 30 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 669 Google reviews, listed on Google as “Window installation service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Washington, D.C., 31 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 74 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arlington, 33 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 80 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Frederick, 8 mi away
Ranked #24 because of its Google rating and review volume: 4.9★ from 283 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chantilly, 30 mi away
Ranked #25 because of its Google rating and review volume: 4.9★ from 2,385 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Typical prices in USD, adjusted for Maryland with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | $3,370 | $7,200 | $11,600 | Per project (several windows): typical range of customer-reported projects. US national range × 0.98 South Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
We scored 591 Green Valley 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 Green Valley 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 |