Les Grumdahl Window & Siding

Reviews

• BR

  Blake Romenesko

  Jan 23, 2026
  5.0
  They were great! From seeing mixed reviews and hit pieces about Les Grumdahl, I had my doubts. I ultimately chose them because I wanted Marvin Infinity windows and their prices were quite reasonable compared to other quotes I got. They did not disappoint! From working around the historic details and quirks of my old house to my various customization requests, I couldn’t be more pleased. Tim was phenomenal to work with from beginning to end.
• JF

  Jenni Fowler

  Dec 5, 2025
  5.0
  Vince and Sofie were very knowledgeable about the windows. I really enjoyed their presentations. They were really good at what they did.
• BG

  Brian Guenterberg

  Oct 26, 2025
  4.0
  They installed 12 Marvin Infinity replacement windows in our house, most of the windows. They did a good job and finished in less than a week, working every business day. The person who did the estimate (Tim) and the workers were friendly and courteous. They cleaned up well after themselves both inside and outside. The only issue we had is their timeline for starting the job, ours started months later than originally stated. My suggestion to Les Grumdahl employees is to over-estimate the time to start rather than under-estimating. Customers will be more happy if you show up earlier than expected rather than later.
• CH

  Connie Hobbs

  Jul 27, 2023
  5.0
  We had almost all of our windows and doors replaced in our house. Les and his employees from the office to the installers and in between were all a pleasure to work with. I’ve had a lot of bad luck with contractors, the work, timelines and cleanliness in the past. Les Grumdahl and his team were wonderful! We would highly recommend and would definitely hire them for future projects!
• LF

  Lauren F

  Apr 9, 2022
  5.0
  I used Les Grumdahl Window & Siding to replace 13 windows and my siding on my house. The wait list was long, but they were upfront about that from the start and it was with all the supply chain issues. I ended up having the work done in the winter which was fine. The crew who did the windows were fast and they made sure to clean up after themselves. It was done pretty quickly once it started. The siding was a one man job. He did a fantastic job! My house had been looking old and worn down, but with the new siding and windows, it looks brand new! Les Grumdahl himself took my calls and answered my questions. He made sure to update me about delays and any other updates. I'm super happy with the end product and thought that the money was reasonable and well spent. Definately reccomend Les Grumdahl and his crew to anyone looking for good quality work!