64/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 980 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 980 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Best Window Installers in Ashton-Sandy Spring, MD (2026)
688 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Ashton-Sandy Spring: Kennedy Locksmith, CR Score 64/100; 4.9★ from 980 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Window Nation, posts 24/7 hours; ranked #2 of 688.
- 2
Most-reviewed: Window Nation, 4,186 Google reviews at 4.7★, the most of 688 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
688 Ashton-Sandy Spring window installers are ranked here by CR Score, from ten published factors. 121 are open 24/7, 456 open Saturdays and 245 open Sundays, based on posted hours. The median Google rating is 4.9★ across 688 rated businesses.
Most of this list also appears on the Window installers in Germantown ranking. See Window installers in Germantown
Top 10 window installers in Ashton-Sandy Spring at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Kennedy Locksmith | 64 | 4.9★ (980) | Aspen Hill, 14 mi away | 24/7 | Overall |
| 2 | Window Nation | 64 | 4.7★ (4,186) | Glen Burnie, 20 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Renewal by Andersen of the Capital Region | 63 | 4.9★ (1,041) | North Bethesda, 9 mi away | Sat · Sun | — |
| 4 | Quality Window & Glass Repair LLC | 63 | 5.0★ (392) | Germantown, 15 mi away | 24/7 | — |
| 5 | Zen Windows Washington DC | 63 | 5.0★ (119) | Washington, D.C., 2 mi away | 24/7 | — |
| 6 | KELEMER BROTHERS REPLACEMENT WINDOWS | 62 | 5.0★ (416) | Silver Spring, 8 mi away | Sat · Sun · Evenings | — |
| 7 | Safety Glass Repair | 62 | 5.0★ (165) | Gaithersburg, 9 mi away | 24/7 | — |
| 8 | Kennedy Glass in DC | 62 | 4.9★ (382) | Washington, D.C., 16 mi away | 24/7 | — |
| 9 | Thompson Creek Window Company Lanham | 61 | 4.5★ (3,143) | Lanham, 17 mi away | Sat · Sun · Evenings | — |
| 10 | dmv 911 locksmith | 61 | 4.8★ (159) | College Park, 10 mi away | 24/7 | — |
The 688 best window installers in Ashton-Sandy Spring, 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.
Based in Glen Burnie, 20 mi away
64/100CR ScoreRanked #2 because of its Google rating and review volume: 4.7★ from 4,186 Google reviews, the most in Ashton-Sandy Spring.
- 4.7★ from 4,186 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 871 Cromwell Park Dr, Glen Burnie, MD 21061
Based in North Bethesda, 9 mi away
63/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 1,041 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 1,041 Google reviews
- Hours
- Mon–Sun 10 AM–6 PM
- Address
- 5081 Nicholson Ln, North Bethesda, MD 20852
Based in Germantown, 15 mi away
63/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 392 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 392 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 19006 Perrone Dr, Germantown, MD 20874
Based in Washington, D.C., 2 mi away
63/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 119 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 119 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Silver Spring, 8 mi away
62/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 416 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 416 Google reviews
- Hours
- Mon–Sun 7 AM–8 PM
- Address
- 10822 Childs Ct, Silver Spring, MD 20901
Based in Gaithersburg, 9 mi away
62/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 165 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 165 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 20032 Mattingly Terrace, Gaithersburg, MD 20879
Based in Washington, D.C., 16 mi away
62/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 382 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 382 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 901 R St NW, Washington, DC 20001
Based in Lanham, 17 mi away
61/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.5★ from 3,143 Google reviews, listed on Google as “Window installation service”.
- 4.5★ from 3,143 Google reviews
- Hours
- Mon–Fri 8 AM–7 PM · Sat 8 AM–5 PM · Sun 9 AM–5 PM
- Address
- 4200 Parliament Pl #600, Lanham, MD 20706
Based in College Park, 10 mi away
61/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.8★ from 159 Google reviews, listed on Google as “Window installation service”.
- 4.8★ from 159 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9320 Cherry Hill Rd, College Park, MD 20740
Based in Darnestown, 7 mi away
61/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 231 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 231 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat 9:30 AM–4:30 PM · Sun 10 AM–3 PM
Based in Washington, D.C., 5 mi away
61/100CR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 3,700 Google reviews.
- 4.9★ from 3,700 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11820 W Market Pl Ste f, Fulton, MD 20759
#13 West Shore Home
Based in Arbutus, 20 mi away
61/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 1,036 Google reviews, listed on Google as “Window installation service”.
- 4.8★ from 1,036 Google reviews
- Hours
- Mon–Sat 8 AM–8 PM · Sun 9 AM–5:30 PM
- Address
- 815 Central Ave Suite A, Linthicum Heights, MD 21090
Based in Ashton-Sandy Spring
60/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 90 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 90 Google reviews
- Hours
- Mon–Sun 9 AM–5 PM
Based in Catonsville, 15 mi away
60/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 97 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 97 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Washington, D.C., 18 mi away
60/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 107 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 107 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1101 Pennsylvania Ave NW, Washington, DC 20004
Based in Rockville, 9 mi away
60/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.9★ from 424 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 424 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 8 AM–1 PM · Sun closed
- Address
- 324 Seth Pl, Rockville, MD 20850
Based in Washington, D.C., 19 mi away
60/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 101 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 101 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1235 Pennsylvania Ave. SE, Washington, DC 20003
Based in Aspen Hill, 11 mi away
60/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 50 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 50 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Columbia, 6 mi away
60/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 99 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 99 Google reviews
- Hours
- Mon–Sun 8 AM–7 PM
- Address
- 7232 Mainstream Wy, Columbia, MD 21044
Based in Washington, D.C., 17 mi away
60/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 116 Google reviews, listed on Google as “Window installation service”.
- 4.8★ from 116 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1535 17th St NW Ste 200, Washington, DC 20036
#22 Pro Glass Repair
Based in Washington, D.C., 17 mi away
59/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 74 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 74 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2425 L St NW, Washington, DC 20037
#23 Window Nation
Based in Lorton, 30 mi away
59/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.5★ from 1,235 Google reviews, listed on Google as “Window installation service”.
- 4.5★ from 1,235 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 8198 Terminal Rd #105, Lorton, VA 22079
Based in Columbia, 11 mi away
59/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.7★ from 584 Google reviews, listed on Google as “Window installation service”.
- 4.7★ from 584 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 9 AM–4 PM · Sun closed
- Address
- 8894 Stanford Blvd STE 301, Columbia, MD 21045
Based in Arlington, 20 mi away
59/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 80 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 80 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1850 Columbia Pike, Arlington, VA 22204
How much do window installers cost in Ashton-Sandy Spring?
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 |
How we ranked Ashton-Sandy Spring window installers
We scored 688 Ashton-Sandy Spring 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 Ashton-Sandy Spring 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 |
Window installers in Ashton-Sandy Spring: frequently asked questions
Who is the best window installer in Ashton-Sandy Spring?
By CR Score, the highest-ranked window installer in Ashton-Sandy Spring, MD is Kennedy Locksmith with a CR Score of 64/100. It has 4.9★ from 980 Google reviews. It is open 24/7. Window Nation (#2) and Renewal by Andersen of the Capital Region (#3) follow. We ranked 688 window installers on ten factors, last updated October 22, 2026.
How many window installers are there in Ashton-Sandy Spring?
ContractorsRanked ranks 688 window installers serving Ashton-Sandy Spring, MD. 1 of them is based in Ashton-Sandy Spring; the rest serve it from nearby towns. Counts are as of October 2026.
Which window installers in Ashton-Sandy Spring are open 24/7?
121 ranked window installers in Ashton-Sandy Spring post 24/7 hours. The highest-ranked are Kennedy Locksmith (#1), Window Nation (#2) and Quality Window & Glass Repair LLC (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which window installers in Ashton-Sandy Spring work on weekends?
456 of 688 ranked window installers post Saturday hours and 245 post Sunday hours. The highest-ranked open Saturdays are Kennedy Locksmith (#1), Window Nation (#2) and Renewal by Andersen of the Capital Region (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does window replacement cost in Ashton-Sandy Spring?
Window replacement typically costs $3,370 to $11,600, with $7,200 typical (Per project (several windows): typical range of customer-reported projects. US national range × 0.98 South Atlantic factor (2025 Cost vs. Value Report)). The range is adjusted for Maryland. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Ashton-Sandy Spring window installers have?
The median Google rating among 688 rated window installers in Ashton-Sandy Spring is 4.9★, with a median of 36 reviews. Window Nation has the most, 4,186 reviews, and ranks #2. 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 Ashton-Sandy Spring count in this ranking?
Yes, if they are within 40 mi of the Ashton-Sandy Spring 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.
Update log for Ashton-Sandy Spring
- October 2026: CR Scores recalculated for 688 window installers serving Ashton-Sandy Spring.
- October 2026: 2 duplicate listings merged.
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