4.6 
154 *The Angi rating for Window Service companies in Sullivan, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window Service needs.
*The HomeAdvisor rating for Window Service companies in Sullivan, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window Service needs.
Last update on September 10, 2025
Serving Sullivan, WI and surrounding areas
Approved
In business since 1957
Free estimates
Warranties offered
"Working with Wasco was a great experience all around, both sales and installation. We intend to use them again in the future to replace additional windows. They were incredibly knowledgable and professional. We would rate them an A++"
+7
Serving Sullivan, WI and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Free estimates
Small jobs welcome
"Brian and Kurt were great. We had our 30 + year old Anderson windows removed and replaced with new glass. This is much less expensive than a full window replacement, and is possible when the basic window frame is still in good condition. Super happy with the result."
+36
Serving Sullivan, WI and surrounding areas
Approved
In business since 2006
Free estimates
Warranties offered
"Mr Atkins was very knowledgeable about the windows that he was selling, very friendly. Mr Atkins was not pushing me to buy the windows which I like. Once again thank you for your professionalism. I look forward to getting my new windows installed! Kelly"
+83
Serving Sullivan, WI and surrounding areas
Approved (Corporate)
In business since 2006
Free estimates
Warranties offered
"great experience, initially had two windows replaced in upper level, they look and work great, so good that i have already hired Empire again for the rest of my windows"
+9
Serving Sullivan, WI and surrounding areas
Approved
Super Service Award Winner
In business since 2001
Free estimates
Warranties offered
"From start to finish my experience with Mad City windows was excellent, from calling to get an appointment for estimate, for measurement of windows and installation. Everyone was pleasant, knowledgeable and proficient. The windows were in stalled in one day with all the old windows and site cleaned. The windows look great. I am very happy with the entire procedure. From start to finish was 6 weeks."
+20
Serving Sullivan, WI and surrounding areas
Approved
In business since 2002
Free estimates
Warranties offered
"Good quality windows! I am very happy!"
+7
Serving Sullivan, WI and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 2007
Free estimates
Warranties offered
"Renewal by Andersen of Wyoming did an incredible job with installing windows in our home. Thank you to the team who did the install and to the company for creating these exceptional windows."
+2
Serving Sullivan, WI and surrounding areas
Approved (Corporate)
In business since 1997
Free estimates
Warranties offered
Infinity Exteriors protects communities from unscrupulous contractors by delivering top-quality roofing, siding, windows, and gutters with integrity and precision. Our expert team of Project Advisors, Managers, and Installers ensures every project meets the highest standards. We provide honest, free estimates, transparent pricing, and detailed timelines so homeowners can make informed decisions. Deeply rooted in our communities, we support local events, youth programs, and charitable initiatives. Using premium materials from trusted manufacturers and backed by industry-leading warranties, we guarantee long-lasting results. With thorough inspections at every phase, we ensure superior craftsmanship and customer satisfaction. When you choose Infinity Exteriors, you're not just upgrading your home—you’re partnering with a company dedicated to protecting your investment and installing peace of mind for years to come.
+16
Serving Sullivan, WI and surrounding areas
Approved (Corporate)
In business since 2002
Free estimates
Warranties offered
"The sales person, Kyle Walsh, was friendly, knowledgeable, on time and gave us a good price with no up-selling. If you want quality windows without being had, definitely give them a call."
Serving Sullivan, WI and surrounding areas
Approved
In business since 1990
Free estimates
Warranties offered
With years of experience serving the area, we are your solution for all your (PWC) needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Check out our 5 star reviews from happy customers! Call us today so we can discuss your needs and make a plan that fits your budget. Satisfaction guaranteed!
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