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Fennell Engineering, Inc. is an Andover structural engineering practice. Its site says it is run by Sean Fennell, PE, and that its main work is structural design documents for new construction and renovation on residential and light commercial projects, plus structural and damage inspection. A recent Google customer said the firm was honest and easy to work with when it helped assess a small structural issue at their home, and that it saved them thousands of dollars. A 2026 customer wrote that Sean was responsive and realistic about what they needed and what they didn't. A 2025 customer said the firm performed a structural analysis on a property they were considering purchasing, identified several key issues that weren't initially obvious, and that its report led them to walk away from the sale. A 2019 customer wrote that after calling over 15 structural engineers, Sean Fennell answered on the second ring, reviewed the property that day and had written, stamped plans for them that evening; they got their building permit on those plans alone. A 2019 customer said Sean came within 24 hours for an urgent assessment ahead of a home purchase and sent an official report within a few hours. A 2021 reviewer listing a brownstone unit in Boston's South End said Sean checked its structure and delivered a written and video report within a few hours of the site visit. A 2020 customer said the firm did the structural design and P.E. stamped drawing package for two new column and beam systems to open up walls on the first level of a three-level condo. A 2021 customer said the firm assessed their garage after a car crashed into it and paid attention to damage another inspector sent by the city had not seen. On Google the firm holds 4.7 stars from 29 ratings, and Angi shows 4.9 from 20. A 2023 Google reviewer said that when they called to ask a question about hiring, the person on the phone said he didn't have time and hung up. A 2019 Angi customer who had a good first project said that when they tried to hire Sean again, calls, texts and emails went unanswered for three weeks before he called to say he was too busy.
Fennell Engineering was honest and easy to work with when they helped me assess a small structural issue at my home. They saved me thousands of dollars.
Sean was very responsive and very realistic about what we needed, and just as important, what we didn’t need. Practical, no nonsense, and fair.
Fennel Engineering was great to work with. I referenced them to perform a structural analysis on a property I was considering purchasing, and their thoroughness, professionalism, and attention to detail truly stood out. They identified several key issues that weren’t initially obvious, and thanks to their clear and detailed report, I was able to make an informed decision to walk away from the sale. That decision likely saved me tens of thousands of dollars in unexpected repairs. I’m beyond grateful for their expertise and highly recommend Fennel Engineering to anyone needing a trusted structural assessment. Total pros from start to finish.
I had a great experience with Fennell Engineering. Sean was professional, responsive, and very practical in his evaluation of my property. I especially appreciated his technically precise yet easy to understand explanation of the issue I asked him to assess. I would not hesitate to call him again should I ever need to.
I contacted Sean to help me with an issue that arose with the house we recently purchased. He was not only very knowledgable, honest and thorough, but he took his time to explain everything to me. Despite my lack of expertise in the area. I highly recommend him and his firm. In the future if I need additional help, I will most certainly be reaching out to him.
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2 changes recorded — last scanned Jul 31, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Fennell Engineering, Inc.. Use it to sanity-check bids, then get the real number in writing.
Firms price in size tiers, not per foot — pick the bracket.
Estimated range
$530 – $760
Typical inspection around $650
Trusted referrals3.1
66 years in business3.7
Buyer inspections3.3
Drone roof checks4.6