Nex-Gen Windows & Doors

I am in the process of replacing my second set of windows with NexGen and it has continued to be a great experience. I worked with Ted and Clark back in 2022 and Ted again this year. I truly appreciate the quick response, straightforward approach, talented install team and great product.

Our Infinity windows have been great. I needed assistance with setting a window back in after washing it...it was the day after Christmas and I called Ted and he said that he would be right out. True to his word,Ted arrived and took care of the issue...fantastic after sale custumer service! Thanks Ted!

We love our Marvin windows from Nex-Gen. The entire process from meeting Mitchel Q, who's product knowledge helped us select the best windows for our home. His guidance through the entire process was very much appreciated as well as his patience while addressing our questions and concerns.
We had 11 windows, custom sills and an entry door professionally installed by crew lead Nicholas B and crewman Gabe D. They did a wonderful job and made sure we were satisfied with the installation.
The windows are awesome, the sills look great and the entry door is super nice. We enjoyed the entire experience and highly recommend Nex-Gen Windows & Doors in Fort Collins!

We went through Costco for a whole new house of windows and a back door slider, and we're long overdue for all because of fear of cost. Mitchell handled consultation and immediately understood our needs and put our fears to rest. The install team of Nick and Gabe was absolutely stellar! They were fast, professional, and detail oriented to a level which pleased even my OCD construction management husband. Noah as Manager was also a complete Rockstar. Bonus points to all involved!

Nex Gen is fantastic. We had work done on our windows and they were prompt courteous and amazing people. Ted and Andrew Andrew are great people to deal with. Friendly, knowledgeable and always right on time. An always happy in their work and the work is amazing. They are trustworthy people to deal with and we highly recommend them for any project.

This is my second time using Nex-Gen. From sales and office staff to installers, everyone is professional. The installers had to work in the mountains on a cold, very windy, and icy day. They took their time to ensure a perfect installation.

This is now my third time working with Nexgen, now replacing all the windows. Once again, it was refreshing to work with a professional company. Steve in sales was patient and helpful when I selected the windows. Whenever I had questions, they were answered promptly, and the installation looks beautiful.

We purchased two new patio doors from Nex-Gen. Their products are both high quality and reasonably priced. All told, it was a very positive experience and we are delighted with our new doors. We initially worked with Steve, who helped us assess our needs and put together our order, and then with Chloe, who was very flexible in helping us set up a convenient installation schedule, and finally with our installers, Nick and Gabe, who were both highly skilled professionals and a delight to work with. I would highly recommend this company to anyone looking for new doors or windows.

We purchased two new patio doors from Nex-Gen. Their products are both high quality and reasonably priced. All told, it was a very positive experience and we are delighted with our new doors. We initially worked with Steve, who helped us assess our needs and put together our order, and then with Chloe, who was very flexible in helping us set up a convenient installation schedule, and finally with our installers, Nick and Gabe, who were both highly skilled professionals and a delight to work with. I would highly recommend this company to anyone looking for new doors or windows.

All of my windows were builder grade vinyl. I could feel air blowing in and there was mold. Also, the seals were broken in the living room and patio door. They were just a mess.
After getting estimates, I decided to go with Marvin Infinity windows from Nex-Gen Windows & Doors. Mitchel Quintana was so helpful and knowledgeable in helping me select replacements. If I had questions or concerns, he promptly responded. It was truly a painless process.
The installers completed everything in one day, and everything looks beautiful! I highly recommend Nex-Gen.

I am very guarded in my reviews. This is a Costco recognized company that is truly honest. The rep informed me that I didn't need 4 large new windows but only the glass replaced at a MUCH cheaper price by a glass company. This kind of honesty is very rare. My highest recommendation to deal with Ted Rajewski and his son's company. Honesty a rare thing these days.