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The Glenn R. Gundersen Company describes itself on its Better Business Bureau page as a residential and commercial roofing and remodeling business, with services that include renovations, siding, gutters, windows and doors. A 2024 Google reviewer couldn't be happier with the siding and trim work done at a commercial building, and said it was almost finished in one day. That 2024 reviewer also wrote that "He does much more than just siding." A 2019 BuildZoom reviewer said Glenn was hired in October 2018 to install porch sliding doors and do ceiling repair at a Madison home, and that he stalled on starting the job until January 7th. That 2019 reviewer wrote that calls were rarely answered or returned, and that boarding went up where the contract called for reinstalling the aluminum siding. In that 2019 review, the customer said it took from mid-January until mid-May to get the material replaced and the siding put up, that the ceiling repairs were still not complete, and that Glenn had been let go. Connecticut lists its home improvement contractor registration, HIC.0554511, held by Glenn R Gundersen Co, as inactive due to non-renewal.
Typical your area range for this kind of work, from regional averages — not a quote from The Glenn R Gundersen Company. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,000 – $11,000
Typical exterior project around $7,500
One of kind contractor that has decades of experience, excellent customer service, great communicator and very detailed. I couldn't be happier with the siding and trim work at my commercial building. Almost finished it in one day. He does much more than just siding. You should definitely give him a call.
Glenn is a guy who is all talk. He will talk you to death with what job he has done but won't ever finish the job he starts for you. Hired him to install porch sliding doors and ceiling repair in my Madison home to get the house ready for resale. Hired him in October 2018 with an immediate start date but he stalled on starting the job until January 7th. Rarely answered or returned calls. Took weeks of calling to get him to start the job. When the job was finally started he used the wrong materials. He was contracted to reinstall the aluminum siding after installing sliders, but instead put up boarding. Took from mid-January until mid-May to get him to replace the material and put up the siding. He has still failed to complete the ceiling repairs. All repair work was written in a contract by him which he couldn't even follow. I have now let him go and if your smart you will hire someone else but Glenn Gundersen
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1 change recorded — last scanned Oct 14, 2026.
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40 years in business3.5
31 years in businessNot yet rated
