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High Tech Dormer Corp. is a Medford, MA framing and general contracting company known for its patented roof lifting and raising system, which it uses to build upper-level additions and shed dormers without a full roof tear-off. Founded in 1987 by Bob and Denise Terenzoni, the company is still run by the Terenzoni family and offers free estimates. It carries an A+ Better Business Bureau grade, though it is not BBB accredited, and BuildZoom shows 81 projects on file. Customer reviews describe extensive framing and exterior renovation work completed with strong craftsmanship, and a 2026 Reddit mention notes the company books pretty far out.
“We worked with hitech dorms who partnered with another company to finish the interior. They book pretty far out though.”
Hi-Tech dormer did extensive work on my house including framing a shed dormer, building a totally new roof and rafters, framing new stairway, window replacement, re-siding the exterior with REMOVEDand redoing trim, and building a new covered entry. The crew really did outstanding work and was a pleasure to work with.
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Sep 19, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from High Tech Dormer. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$23,000 – $35,000
Typical remodeling project around $29,000
Custom sheds5.0
Gut renovations4.8
Porch and deck rebuilds4.8
Tile and stone4.1
