Big L Windows And Doors is a home improvement company out of Cheektowaga, New York that has been in business since 1975. The company sells and installs replacement windows, entry doors, and patio doors in the greater Buffalo and Niagara New York metro markets. Generally, the company receives very good reviews on online reviews sites such as Google Local. Scroll down to read all of our Big L Windows and Doors reviews.
Overall Rating:Big L Windows And Doors gets a 4.4 out of 5 stars based on 4consumer reviews below.
My Take On This Company: Big L Windows And Doors just just my radar, but I definitely like the brands they sell. I'm still waiting to hear more about their installation services, but they're definitely worth a price quote I would say.
(Always Get 3 to 4 Local Price Quotes - And My Personal Advice)
Dane - Site Editor - Original Publish Date - January 21, 2026 Page Last Update: January 21, 2026
Also please consider filling out the free form on our site for 3 quality window price quotes — it’s how we afford to provide free consumer information. We’re not incentivized by ANY company and will help you with ANY questions you might have, and help you navigate ANY bids you receive. That’s our guarantee to you!
Big L Windows And Doors sells and installs a number of quality replacement window and door brands. In terms of their windows, the company carries Harvey and Mi vinyl windows, as well as Marvin fiberglass and wood.
In terms of Big L Windows And Doors entry and patio doors, the company sells and installs ProVia, ThermaTru, and TruStile. (ProVia manufactures some of the best patio doors in the business.)
On the storm doors front, the company carries and installs the whole fleet of ProVia storm doors, which are also widely considered the best in the business.
Big L Windows Warranty
Big L Windows And Doors offers a 5 year labor warranty on all of their windows and doors. This means that if there are any manufacturing defects or installation issues, then the company will cover the labor cost to repair or replace the products they installed. (The company offers what they call a Lifetime Installation Guarantee — lifetime repair for installation on issues, but these aren’t going to pop up after five years.)
The warranty covering the actual windows and doors comes from the manufacturers themselves (Harvey Windows, Mi Windows and Doors, etc.). In most cases, vinyl window and door companies offer a lifetime warranty against any manufacturing defects for the original buyer. Fiberglass windows and doors will typically carry a more limited warranty than vinyl. To check the warranty details, terms, provisions, and exclusions, visit our replacement windows warranty page that lists the top 100 window manufacturers in the United States.
Big L Windows And Doors Review And Q/A
Below are consumer questions and answers, homeowner and consumer price quotes, accolades, complaints or kudos, as well as additional consumer information.
Dane - Site Editor
Replacement Window Price Quotes
Dane, your site has been a wonderful resource. I am replacing wood clads in a house built in 1992 and think I have narrowed my search down to the Marvin Infinity. However, the quote I received seems high compared to the general price per window I see on your site. I also considered the Sunrise Restorations but was advised that the hybrid vinyl and fiberglass window could not be made in the dimensions needed for my large round top front window (60”x96”) and I am concerned that having one Marvin window next to the Restorations in the front of the house may not look right.
I have attached both quotes. Both are for full frame installs. Would you mind giving me your opinion? Thank you. The Marvin Windows quote is actually $33,000 with a 10% discount and Big L suggested using the Marvin Infinity for the large round top if we go with the Restorations. Do you think that would be too incompatible as far as looks go? Also is the Marvin Infinity quote in line with what you would expect for that window?
This is a picture of the front of the house as it currently looks. The larger round top is fairly prominent and visible. Thanks.
Vicky - Homeowner - from 2021
[Site Editor's Answer]
Vicky, so the Marvin Infinity quote is for $36,765 and the Sunrise Restorations is for $20,770. For me, the Sunrise Restorations is a fantastic window that is definitely as good as the Marvin Infinity. This would be my choice in a heartbeat (given the almost double cost of the Marvin). The inability of the window to be made in a round top is problematic. I would find another vinyl window manufacturer that uses a slim frame like the Restorations for the round top and see how close you can get the frame widths to match.
Tim - Site Editor - from 2021
Big L Windows And Doors Reviews
Hi Tim, thank you in advance for taking the time to look over my estimates. I live in the Buffalo, NY area. We are looking to replace original casement windows with 9 double hungs and 2, maybe 3 awning windows. We have called seven window companies for estimates and thanks to your site I have a better understanding of what to look for in windows. My research on companies has come up with the below list of estimates. I was looking to see what your thoughts are on them. Thank you again.
Here are the estimates:
1. Comfort Windows Upstate NY company that manufacturer's their own windows
9 dbl hungs, 3 awnings
-Triple pane- $11,687
-Double pane- $10,662
2. Tomson Windows Soft-lite Pro Series
9 DH and 2 awnings
-Double pane- $7645
Doesn't recommend triple pane windows due to weight for the size of some of the double hung windows.
3. Big L windows and doors Sunrise Restorations w/ glass pkg N2100A
9 Dbl hung, 5 full replacement and 4 inserts.
1 awning- insert
Double pane- $11,625
4. Wonder Windows Okna Insul-tec Deluxe double pane
9 DH and 2 awning
$8788
- Okna Enviro-Star
+ $1500-2000= $10300-$10800
(Said he wouldn't recommend bc will not make up the difference in cost over the life of the windows)
5. Springville Doors and Windows Sunrise Platinum Window - Omega 12 HP glass pkg w/ interior Thermal IU Plus
9 DH and 2 awning
$11,547-double pane
Are the Platinum window series the same/similar to the Restoration windows?
6. Window Factory Outlet - Platinum Pro200 (DH) and Platinum pro8100(awning)
9 DH and 2 Awning
$8100
Salesman said they use Owens Corning Air Seal Technology on their windows.
7. Braymiller Builders - Soft-lite Elements or Bainbridge Luxury Edition
8 DH and 3 awnings double panes
-Elements--> $15312
-Bainbridge LE--> $10835
From what I have been reading on your site (I found you by searching for Big L Windows And Doors reviews) and others I think my top 3 would be estimates 4, 2, and 5. We don't plan on moving for a long time, so I would like a good quality window. I am looking to see what your thoughts are. Looked up reviews for installation quality. I take them with a grain of salt. They all had pluses and minuses, none really stood out as I definitely should hire this company. Thank you again.
Enzo - Owner - from 2020
[Website Editor Reply]
Enzo, I think you are completely correct in your thinking on the particular bids. Since you are staying in your home long term, I would say the Okna Insul-tec Deluxe double pane bid is the top, followed by the Soft-lite Pro Series. These would be the bids I would work first. If one or both falls out for some reason, then I would probably consider the Sunrise windows cost bid. Great window selection though! All of these three options are excellent!