660 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Potomac: Kennedy Locksmith, CR Score 65/100; 4.9★ from 980 Google reviews; open 24/7.
Best for emergencies (open 24/7): Quality Window & Glass Repair LLC, posts 24/7 hours; ranked #3 of 660.
Most-reviewed: Window Nation, 4,186 Google reviews at 4.7★, the most of 660 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
660 Potomac window installers are ranked here by CR Score, from ten published factors. 114 are open 24/7, 434 open Saturdays and 234 open Sundays, based on posted hours. The median Google rating is 4.9★ across 660 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Kennedy Locksmith | 65 | 4.9★ (980) | Aspen Hill, 9 mi away | 24/7 | Overall |
| 2 | Renewal by Andersen of the Capital Region | 63 | 4.9★ (1,041) | North Bethesda, 6 mi away | Sat · Sun | — |
| 3 | Quality Window & Glass Repair LLC | 63 | 5.0★ (392) | Germantown, 11 mi away | 24/7 | Emergencies |
| 4 | Kennedy Glass in DC | 63 | 4.9★ (382) | Washington, D.C., 12 mi away | 24/7 | — |
| 5 | KELEMER BROTHERS REPLACEMENT WINDOWS | 62 | 5.0★ (416) | Silver Spring, 11 mi away | Sat · Sun · Evenings | — |
| 6 | Safety Glass Repair | 62 | 5.0★ (165) | Gaithersburg, 12 mi away | 24/7 | — |
| 7 | Window Nation | 62 | 4.7★ (4,186) | Glen Burnie, 32 mi away | 24/7 | Most reviews |
| 8 | Rockville Auto Glass Replacement | 61 | 4.9★ (231) | Darnestown, 8 mi away | Sat · Sun · Evenings | — |
| 9 | Lumina Glass & Windows | 61 | 5.0★ (107) | Washington, D.C., 13 mi away | 24/7 | — |
| 10 | Window Nation | 61 | 4.5★ (1,235) | Lorton, 20 mi away | 24/7 | — |
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: 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 North Bethesda, 6 mi away
Ranked #2 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 Germantown, 11 mi away
Ranked #3 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 Washington, D.C., 12 mi away
Ranked #4 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 Silver Spring, 11 mi away
Ranked #5 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 Gaithersburg, 12 mi away
Ranked #6 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 Glen Burnie, 32 mi away
Ranked #7 because of its Google rating and review volume: 4.7★ from 4,186 Google reviews, the most in Potomac.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darnestown, 8 mi away
Ranked #8 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 Washington, D.C., 13 mi away
Ranked #9 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 Lorton, 20 mi away
Ranked #10 because of its Google rating and trade focus: 4.5★ from 1,235 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fairfax, 10 mi away
Ranked #11 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., 15 mi away
Ranked #12 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 Lanham, 21 mi away
Ranked #13 because of its Google rating and trade focus: 4.5★ from 3,143 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., 15 mi away
Ranked #14 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 Rockville, 6 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 424 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., 12 mi away
Ranked #16 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 College Park, 15 mi away
Ranked #17 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 Aspen Hill, 9 mi away
Ranked #18 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 Alexandria, 15 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 372 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., 12 mi away
Ranked #20 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, 13 mi away
Ranked #21 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 Falls Church, 11 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ 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 Gaithersburg, 9 mi away
Ranked #23 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 Rockville, 6 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 146 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Bethesda, 6 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 208 Google reviews, listed on Google as “Window installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 660 ranked window installers here; the rest are on their profiles.
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 |
|---|---|---|
| Accents Pro Renovators LLC | 5.0★ (2) | 14 mi |
| Allied Auto Glass of D.C | 5.0★ (2) | 12 mi |
| AZE Home Improvement, LLC | 5.0★ (2) | 19 mi |
| Builders Siding Co | 5.0★ (2) | 18 mi |
| Clear Choice of Maryland | 3.0★ (2) | 20 mi |
| Fish Window Cleaning | 5.0★ (2) | 9 mi |
| Hallmark Construction | In Potomac | |
| HiRISE WINDOWS | 3.0★ (2) | 6 mi |
| Hopkins & Porter Construction, Inc. | 4.9★ (37) | In Potomac |
| Logan Design & Build | 5.0★ (17) | In Potomac |
| M & G Renovations, Inc | 5.0★ (2) | 15 mi |
| Oriental Living | 5.0★ (2) | 6 mi |
| Potomac Heating and Air Conditioning | 4.6★ (20) | In Potomac |
| PROFIX WINDOWS & DOORS SERVICES | 5.0★ (2) | 13 mi |
| Rose Power Wash | 4.8★ (16) | In Potomac |
| Sears Heating and Air Conditioning | 3.0★ (2) | 10 mi |
| Sears Window Replacement | 2.5★ (2) | 16 mi |
| SG Windows and Doors LLC | 5.0★ (2) | 13 mi |
| TriState Glassworx | 5.0★ (2) | 14 mi |
| WG Home Remodeling | 5.0★ (2) | 12 mi |
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 660 Potomac 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 Potomac 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 |