86/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 143 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 143 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Best Window Installers in St. Catharines, ON (2026)
375 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in St. Catharines: BM Windows and Doors, CR Score 86/100; 5.0★ from 143 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Ontario Window Care - Window Cleaning & Exterior Services, posts 24/7 hours; ranked #2 of 375.
- 3
Most-reviewed: Renewal by Andersen of Greater Toronto, 2,808 Google reviews at 4.8★, the most of 375 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
375 St. Catharines window installers are ranked here by CR Score, from 8 published factors. 50 are open 24/7, 215 open Saturdays and 125 open Sundays, based on posted hours. The median Google rating is 4.9★ across 375 rated businesses.
Top 10 window installers in St. Catharines at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | BM Windows and Doors | 86 | 5.0★ (143) | Etobicoke, 50 km away | 24/7 | Overall |
| 2 | Ontario Window Care - Window Cleaning & Exterior Services | 86 | 5.0★ (65) | St. Catharines | 24/7 | Emergencies |
| 3 | Renewal by Andersen of Greater Toronto | 85 | 4.8★ (2,808) | Mississauga, 62 km away | Sat · Sun · Evenings | Most reviews |
| 4 | Jay's Glass | 85 | 5.0★ (128) | Toronto, 58 km away | 24/7 | — |
| 5 | The Window Source of WNY | 85 | 4.9★ (53) | Buffalo, 40 km away | 24/7 | — |
| 6 | MasterShine Window & Eaves Cleaning Niagara | 84 | 5.0★ (243) | Thorold, 7 km away | Sat · Sun | — |
| 7 | Sprint Auto Glass | 84 | 4.7★ (413) | Scarborough, 64 km away | 24/7 | — |
| 8 | Oakville Renovation | 84 | 5.0★ (39) | Oakville, 44 km away | 24/7 | — |
| 9 | Paramount Windows & Doors | 84 | 4.9★ (95) | Buffalo, 59 km away | 24/7 | — |
| 10 | 4wards Exteriors | Siding, Eavestrough & Roofing | Windows & Doors | 84 | 5.0★ (64) | Welland, 19 km away | 24/7 | — |
The 375 best window installers in St. Catharines, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Based in St. Catharines
86/100CR ScoreRanked #2 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.
- 5.0★ from 65 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 151 Cushman Rd, St. Catharines, ON L2M 6T4
Based in Mississauga, 62 km away
85/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 2,808 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.8★ from 2,808 Google reviews
- Hours
- Mon–Fri 8 AM–10:30 PM · Sat–Sun 9 AM–8 PM
- Address
- 6581 Kitimat Rd Units 11-13, Mississauga, ON L5N 3T5
#4 Jay's Glass
Based in Toronto, 58 km away
85/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 128 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 128 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Buffalo, 40 km away
85/100CR ScoreRanked #5 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.
- 4.9★ from 53 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1285 Niagara Falls Blvd, Buffalo, NY 14223, United States
Based in Thorold, 7 km away
84/100CR ScoreRanked #6 because of its Google rating and availability: 5.0★ from 243 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 243 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun 9 AM–6 PM
- Address
- 92 Baxter Crescent, Thorold, ON L2V 4R6
Based in Scarborough, 64 km away
84/100CR ScoreRanked #7 because of its Google rating and availability: 4.7★ from 413 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.7★ from 413 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1964 Victoria Park Ave, Scarborough, ON M1R 5G7
Based in Oakville, 44 km away
84/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 39 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 39 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Buffalo, 59 km away
84/100CR ScoreRanked #9 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.
- 4.9★ from 95 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1061 Bullis Rd, Elma, NY 14059
Based in Welland, 19 km away
84/100CR ScoreRanked #10 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.
- 5.0★ from 64 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 31 Lisa Ct, Welland, ON L3C 6A2
Based in St. Catharines
83/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 617 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 617 Google reviews
- Hours
- Mon–Fri 8:30 AM–5:30 PM · Sat–Sun closed
- Address
- 700 Niagara St Unit #1, St. Catharines, ON L2M 3R9
Based in Buffalo, 51 km away
83/100CR ScoreRanked #12 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.
- 4.5★ from 208 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3898 Broadway, Buffalo, NY 14227, United States
Based in Mississauga, 64 km away
83/100CR ScoreRanked #13 because of its Google rating and availability: 4.9★ from 78 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 78 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1535 Meyerside Dr unit # 10, Mississauga, ON L5T 1M9
Based in St. Catharines
83/100CR ScoreRanked #14 because of its Google rating and availability: 4.7★ from 28 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.7★ from 28 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 110 James St, St. Catharines, ON L2R 7E8
Based in St. Catharines
83/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.8★ from 155 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.8★ from 155 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 8 AM–12 PM · Sun closed
- Address
- 161 Hartzel Rd, St. Catharines, ON L2P 1N6
Based in Niagara Falls, 12 km away
83/100CR ScoreRanked #16 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.
- 5.0★ from 37 Google reviews
- Hours
- Mon–Sat 10 AM–4 PM · Sun 10 AM–3 PM
- Address
- 4807 Kent Ave, Niagara Falls, ON L2H 1J5
Based in St. Catharines
82/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 60 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 60 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 8 AM–2 PM · Sun closed
- Address
- 6 Regent Dr, St. Catharines, ON L2M 3L5
#18 Win/Glassco
Based in Etobicoke, 63 km away
82/100CR ScoreRanked #18 because of its Google rating and availability: 5.0★ from 42 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 42 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 416 The Westway, Etobicoke, ON M9R 1H7
Based in Norfolk County, 15 km away
82/100CR ScoreRanked #19 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.
- 5.0★ from 105 Google reviews
- Hours
- Mon–Sat 8 AM–5 PM · Sun closed
Based in Etobicoke, 53 km away
82/100CR ScoreRanked #20 because of its Google rating and availability: 5.0★ from 157 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 157 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 18 Alcan Ave, Etobicoke, ON M8W 1V1
Based in Toronto, 58 km away
82/100CR ScoreRanked #21 because of its Google rating and review volume: 5.0★ from 1,240 Google reviews, 1,240 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 1,240 Google reviews
- Hours
- Mon–Fri 8 AM–9 PM · Sat–Sun 10 AM–8 PM
- Address
- 2967 Dundas St W #731, Toronto, ON M6P 1Z2
Based in Welland, 23 km away
82/100CR ScoreRanked #22 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.
- 4.9★ from 40 Google reviews
- Address
- 28 Clark St, Welland, ON L3B 5W6
Based in Tonawanda, 36 km away
82/100CR ScoreRanked #23 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.
- 4.2★ from 120 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 454 Young St, Tonawanda, NY 14150, United States
Based in Toronto, 57 km away
82/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 138 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 138 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 9 Lawlor Ave, Toronto, ON M4E 3L8
Based in St. Catharines
82/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 52 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 52 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat 10 AM–5 PM · Sun closed
- Address
- 21 Duke St suite 107, St. Catharines, ON L2R 5W1
Window installers ranked #26 to #50
#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 375 ranked window installers here; the rest are on their profiles.
Also serving St. Catharines
20 more window installers within 64 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
How much do window installers cost in St. Catharines?
US national ranges converted to CAD, not adjusted for St. Catharines. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | CA$4,830 | CA$10,330 | CA$16,640 | Per project (several windows): typical range of customer-reported projects. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
How we ranked St. Catharines window installers
We scored 375 St. Catharines 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 St. Catharines 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 |
Window installers in St. Catharines: frequently asked questions
Who is the best window installer in St. Catharines?
By CR Score, the highest-ranked window installer in St. Catharines, ON is BM Windows and Doors with a CR Score of 86/100. It has 5.0★ from 143 Google reviews. It is open 24/7. Ontario Window Care - Window Cleaning & Exterior Services (#2) and Renewal by Andersen of Greater Toronto (#3) follow. We ranked 375 window installers on 8 factors, last updated October 22, 2026.
How many window installers are there in St. Catharines?
ContractorsRanked ranks 375 window installers serving St. Catharines, ON. 11 of them are based in St. Catharines; the rest serve it from nearby towns. Another 20 within 64 km are listed but not ranked yet. Counts are as of October 2026.
Which window installers in St. Catharines are open 24/7?
50 ranked window installers in St. Catharines post 24/7 hours. The highest-ranked are BM Windows and Doors (#1), Ontario Window Care - Window Cleaning & Exterior Services (#2) and Jay's Glass (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which window installers in St. Catharines work on weekends?
215 of 375 ranked window installers post Saturday hours and 125 post Sunday hours. The highest-ranked open Saturdays are BM Windows and Doors (#1), Ontario Window Care - Window Cleaning & Exterior Services (#2) and Renewal by Andersen of Greater Toronto (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does window replacement cost in St. Catharines?
Window replacement typically costs CA$4,830 to CA$16,640, with CA$10,330 typical (Per project (several windows): typical range of customer-reported projects. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026)). This is a national range, not adjusted for St. Catharines. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do St. Catharines window installers have?
The median Google rating among 375 rated window installers in St. Catharines is 4.9★, with a median of 33 reviews. Renewal by Andersen of Greater Toronto has the most, 2,808 reviews, and ranks #3. 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 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do window installers outside St. Catharines count in this ranking?
Yes, if they are within 64 km of the St. Catharines city centre, 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 St. Catharines
- October 2026: CR Scores recalculated for 375 window installers serving St. Catharines.
More window installers and St. Catharines pages
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