A Spotless Sweep Chimney Service

A Spotless Sweep Chimney Service is a one-person Winthrop chimney outfit that homeowners find after the bigger names quote too much — a 2025 Google review from someone who had just moved to the Newburyport area says nearby options were all overpriced before they came across Mark, who has been at the trade for at least 30 years. Thumbtack lists him as Mark Valys, with 31 years in business, and its 60 ratings there average 4.9 stars. The written reviews, stretching back to 2017, describe the same pattern each time: Mark shows up, explains what he finds, and does the cleaning and repair work himself. In a 2020 review, a customer described a terrible smell from the chimney that he cleaned and then traced to problems a previous installer had left, fixing those too. A 2021 review is more pointed — another company had quoted $4,000 in chimney repairs that Mark found weren't actually needed, saving the homeowner the expense. In the 2025 job, he replaced a chimney cap, repaired a broken flue, and redid the flashing for roughly half what competitors were asking. Most of the record is enthusiastic — Thumbtack's 60 ratings run 98% five stars — but a small remainder, 2%, sits at one star, with no review text attached to explain why. Thumbtack also credits him with a masonry certification from the Wentworth Institute of Technology and a chimney-cleaning-and-repair certification from the Chimney Sweep Institute of America. One thing worth confirming before booking: Thumbtack's own profile lists the business under Lynn, MA, while the address on file is in Winthrop, so it's worth checking which service area and location are current. Beyond that, this reads like a solo chimney specialist worth calling for a sweep, a cap or flashing repair, or a second opinion before paying for repairs another company says you need.