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Kensington Windows Reviews

Read 10 Kensington windows reviews from our editors, as well as homeowners and contractors to find out about their products and customer service record. Get more information on Kensington window prices.

Have a question for our site editors, Dane and Tim? Email them and let them answer your specific project questions. Make sure to include your email address so they can get back to you directly (we never use or sell your email, we promise.)

Please note, our website is not affiliated with this window manufacturer.

Kensington Window Prices | Kingston Series

501 Series | Quantum 2 Series

Editor Kensington Windows Reviews

Kensington HHP is a window manufacturer with a single factory in Western Pennsylvania and produces 3 vinyl window series. Contrary to what I wrote about Kensington previously, Kensington HPP, Inc. has no affiliation to Alpen HPP, other than the owners of each companies are friends and both were at one time owned by Serious Energy.

Kensington HPP was formed in 2013 when 2 long term employees bought the company from Serious Energy. Kensington Windows was part of the Jancor bankruptcy back in 2008.

Tim - Editor - from 2014

Kensington Windows History Explained

Our current plant has been in operation since 1977. For the first 20 years under an ownership group led by the Snyder family. In 1995 a large holding company from Canada, Jannock Ltd, purchased the company as part of their vinyl division. This division was comprised or several companies including 2 vinyl window manufacturers, Kensington Windows and Survivor Technologies.

In 1999 the operating management team of the vinyl division purchased the division from Jannock and for Jancor. Jancor was a very profitable company for 10 years and as the building materials industry took a serious downturn in 2006, cash got tight. In 2008 the bank called the line causing Jancor to shutter all 5 of its operating companies. Kensington Windows was a profitable company even in the down years for the industry with a great product line-up and as such was involved in an asset purchase in January 2009 out of bankruptcy by Serious Materials.

Serious operated the company until March 2013 when the 2 senior managers of the company, John Barker and myself, were able to come to terms with Serious to purchase the company to allow this plant to continue to employ great people in this area and focus on delivering high quality and high performance products for many years to come. We wanted to pay tribute to the decades of service and the great reputation when we took on the new name of Kensington HPP (High Performance Products).

We offer a one week lead as we have maintained since the late 1990's and currently are the only vinyl replacement window manufacturer in north America producing Heat Mirror glass systems for our Energy Star Most Efficient product offering. I have been in a senior management position with this plant for 20 years and have been in the industry now into my fifth decade. John Barker is our CFO and co-owner of the company and he has been with the plant for 10 years. He's also been in the building materials industry for 30 years including a stint for the parent company owner by the Snyder family in the 90's.

Chuck Wetmore - CEO, Kensington HPP, Inc - July, 2016

Kensington Kingston Windows Prices

The Kingston or 300 Series is their lower end vinyl window that is an okay window. Consumers would probably do better with these high rated but still affordable vinyl windows from some better known window companies out there.

Dane - Site Editor

Kensington HPP Kingston vs. Advanced Windows 6300 Series

Hi Dane and Tim, I came across your website and appreciate the discussions and information you manage and post.

I am also in the final stages of making a decision to replace 4 windows in our home in the Chicago suburbs. We plan to replace the following:

(2) double-hung
(1) half arch (over the double-hung windows)
(1) garden window for kitchen

I wanted to seek out your insight and input before making a final decision. I am deciding between the following two quotes:

1 – Kensington HPP Kingston: (2) double-hung and (1) half arch window = $3,350; (1) garden window = $2,800

2 – Advanced Windows 6300 Series: (2) double-hung and (1) half arch window = $4,590; (1) garden window = $2,800

Both of the contractors have positive reviews on Yelp and other sites. Two parts do concern me – 1) the quality of windows from the two manufacturers based on some online comments (I believe including your site) and 2) the price quote estimate from your website (results below) was far below the actual quoted prices.

Replacement Windows Reviews – Cost Estimate (only for 2 double hung windows):
$1080 (includes windows and installation)
2 Windows
Mid Range Budget
Vinyl Window Frame
Double Hung Window
Full Frame Replacement Installation

Many thanks in advance for your help and insight! I look forward to hearing from you soon.
Kind regards.

Jamie - Homeowner - from 2018

[Site Editor's Answer]

Jamie, yes the average cost of a replacement window is $540 or so. The problem is that SO MANY factors determine the actual price that it's too difficult to use an online calculator to give better pricing. For instance, most window prices are based on the lineal feet of the opening, but no one would measure all their windows and input that info into our site.

I would get two more bids if I were you only because that's a pretty specific project requirement with the arch top and garden window. You might get a bid that really appeals to you outside of what you have.

I like Kensington HPP a lot. The Kingston is their lower end window, but it's still a better window than lots of mid range vinyl windows. I've heard of Advanced Windows, but don't have enough information to give you much of an opinion.

I would stick with Kensington myself but only because I know they have a good reputation. I'd get two more bids and see if that helps put the bids you have as fair or overpriced.

Dane - Site Editor - from 2018

Kensington Kingston vs. Alside Mezzo

Dane, Thanks for your response. Tried searching as noted. My window request was for mid grade vinyl double hung replacement windows. I asked for a quote with all materials and services listed, as you can see below that requirement was not meet with any of the quotes.

Custom Siding and Gutters
Kensington Kingston 1/2 screen under 103 ul. KG4 glass.
This is a possibility not sure about the KG4 glass

Economy siding and windows
Viwintec 6000 ultras

Creative Additions

Yoder Brothers Construction
Alside mezzo series
Low E argon has, exterior trim installed
This is a possibility

American Glass
Window Mart 7200 series
No price
? Is all I can say here.

Mid grade thin glass

Let me know if any of these are viable options.

David - Homeowner - from 2018

[Site Editor's Answer]

David, first of all how crazy is that Sears quote? Who do they think they are giving you such an outrageous quote, Renewal By Andersen? :)

I like two bids. First off the Kensington Kingston. I would be prefer you go with one of their upgraded models like the Huntington, but Kensington makes good windows. Ask if they have access to other Kensington HPP products. I'd definitely pay for the better glass package. If the installation track record and online reviews of the company doing the work is solid, this is what I'd recommend. Plus it's the least expensive.

The other option is the Alside Mezzo. I don't love this window frame, but overall a decent window and impressive air infiltration numbers. Check their online reviews etc. and put this in spot number two if the company doing the work passes muster.

Let me know if either of these works out and good luck!

Dane - Site Editor - from 2018

Kensington Kingston 300 Window Bid

Dear Dane, I am currently looking at replacing 16 windows in my home.

Contract Pro offered Kensington 3000 series installed $8,000.

Jennifer - Homeowner - from 2018

[Site Editor's Answer]

I like Kensington HPP, but they don't sell a 3000 series window. They do sell a Kingston 300 series, although they usually drop the 300 part on the website. I know they have had warranty issues in previous years with financial problems with ownership changes. Since 2013, they have become quite a reliable company. Having said that, I would be wary about using their entry level window. Can you get a quote on the Huntington model. If you got that one for $10K I think that would be the option I would go with. The window offers very good performance and is a generally nice looking vinyl window in my opinion.

Dane - Site Editor - from 2018

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Kensington 501 Windows Reviews

Kensington Huntington 501 Question

Hi Tim, I put 7 double hung Kensington Huntington 501 windows in a new sunroom that I had built about 6 months before the original Kensington Co filed for bankruptcy (roughly 10 years ago). About three weeks ago I emailed their company and received a price on 8 separate pains that have fogged up. My question is can I replace the glass panes myself and what tools would I need. Are you aware of any U-Tube video or any other instructions where I could see the steps needed to take the old window out and put the new one in?

Thanks for your help.

Fred - Homeowner - from 2018

[Site Editor's Answer]

Fred, there are lots of videos on it on -- go to and put in "replace window glass" and lots of videos will pop up. Honestly though I would hire someone local on craigslist or yelp who specializes in window repair. They will give you a free estimate on work. Best of all you can get their opinion on the actual work and if you don't like their prices, you'll get lots of great free information.

Dane - Site Editor - from 2018

Kensington Quantum 2 Windows Reviews

The Kensington Quantum 2 is the company's premium vinyl window that is incredibly energy efficient. The double hung comes standard with triple weather stripping, warm-edge spacer, a fusion welded frame, recessed tilt latches, an ILSTM interlocking six-degree sloped sill, and a stealth locking system. It's a very nice unit and very well made.

Dane - Site Editor

Kensington Quantum & Soft Light In Kentucky

Hi Tim! I have several appointments with Okna dealer, Kingston Quantum, Soft light, and Alside Mezzo. But I really like the large glass slim vinyl look of sunrise restorations. My problem is sunrise doesn’t have a dealer in the state of Kentucky. Do you know how I can purchase this window?

Brad - Homeowner - from 2018

[Site Editor's Answer]

Brad, unfortunately, if they don't have a dealer you can't buy the window. Okna and Soft-Lite though are excellent manufacturers and you should be well served by either one of these.

Tim - Site Editor - from 2018

Kensington Quantum 2 Windows Reviews

I am a builder in the Madison, WI area. I would like to know your opinion on what window manufacturer makes the best vinyl replacement window that I can purchase either directly from the factory or a local dealer?

Larry - Builder - May, 2015

[Editor's Response]

Larry, I don't know what specific companies have reps in your area, but a quick call to the home offices of the following companies will tell you quickly whether they service your area or not. I did locate a local company that sells Sunrise windows though. Sunrise tend to be pretty reasonable in price for top quality vinyl windows. The Kensington Quantum 2 has great numbers and shouldn't be too expensive either.

4401 Femrite Dr Suite C
Madison, WI 53716

Here are my top 8 vinyl windows, from least expensive to most (roughly)

Okna 500 Series
PGT 2300 SpectraGuard
Soft-Lite Classic
Kensington Quantum 2
Polaris Ultraweld
HiMark Enviro-Star 800
Sunrise Restorations
Oka EnviroStar

Some History On Kensington

Kensington was at one point owned by Jancor Windows, but then they declared bankruptcy and the plant that produced the Kensington window models was shut down. Eventually, Serious Windows bought them and starting making windows under the Serious name. In 2012, Serious went out of business and now if you google Serious windows you get Alpen High Performance Products. So it's pretty confusing for consumers because there are lots of installers out there who think highly of the window itself. The ownership is all over the board. The fact of the matter is I could never recommend this company to a consumer because everytime they go through a bankruptcy they erase the warranty obligation to hte consumer. Too many other good manufacturers - Sunrise, Marvin, Andersen, Okna to name a few.

Michael - Contractor- from 2013

Kensington Quantum 2 Review

Kensington went out of business maybe a year ago, a few years after we purchased the Quantum 2 window, which was very pricey. The coating on the glass get these little brown spots and we have to send them back and get them reinstalled - for some reason we have to pay for the glass, but the distributor has been good about the whole thing and continues to do the reinstalls free of charge. These are just too expensive to have this happen, especially since they were installed just 4 years ago. I'm certain that we will have to replace all of the 20 odd windows at some point and pay for them ourselves.

Daniel - Homeowner - from 2011

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