A waterfront retaining wall made of concrete and stone, with a house on top. Rocks line the water's edge.

A worker in camo hard hat secures wire mesh to a stone wall with a tool; electrical cords visible.

Damaged brick wall and debris. Cloudy sky in the background.

Gray house on a rocky shoreline, with a retaining wall.

Foundation wall with stone and concrete construction; rubble pile; construction equipment.

Stone wall with a life preserver and rocks at its base.

Construction workers at a site with concrete forms and black lining, working outdoors on a cloudy day.

Man spraying water on a concrete wall near a waterway. A second worker stands in the background.

Waterfront view with concrete structures and a brick building under a clear blue sky.

Brick building along a waterway with a bridge in the background under a blue sky.

Ladder ascending into a dark shaft; circular opening at the top; a single light source illuminates the scene.

Construction worker applying concrete to a wall. A ladder and wood paneling are also in the shot.

Stone wall with house in the background, a rocky shore, and a clear blue sky.

Two people in safety vests clean debris from a dock edge in a body of water, with buildings and boats in the background.

A metal structure layered above a large pile of grey debris inside a dark, round enclosure.

Construction site: Excavation next to a building's stone foundation. Gray gravel, wood, and concrete are visible.

A building with columns behind a black fence, with a grassy hill and tree in front.

Person in protective gear working inside a dark tunnel, construction in progress.

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Xtreme Shotcrete

Local business · Winthrop, MALocal business · 166 Woodside Ave., Winthrop, MA 02152

Their work

19 photos

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Verified record

License not state-verified. We could not confirm a current registration in the state registry. Insurance is self-reported. Look up in the official Massachusetts registry ↗

Reach out

Call (617) 892-0193 Visit website

You reach them directly — we don’t take a cut.

Verified record

License not state-verified. We could not confirm a current registration in the state registry. Insurance is self-reported. Look up in the official Massachusetts registry ↗

Highlights

Emergency seawall repair — hired by Swampscott for a major collapse response
BBB A+ rating — no complaints on file despite non-accredited status
Long track record — self-reported operating since 2007

Inactive GC/HIC license — BuildZoom shows it expired in May 2019

Xtreme Shotcrete LLC is a Winthrop, Massachusetts contractor specializing in shotcrete — sprayed concrete — work for sea walls, retaining walls, foundation crack repair, basement floor repair, and slope stabilization, serving the North Shore towns of Chelsea, Everett, Lynn, Malden, Medford, Revere, Saugus, Somerville, and Winthrop for both residential and commercial clients. The company is listed with the Better Business Bureau as operating since 2007 (19 years), with owner Mike Whitehead as President and a second location in Revere. The strongest evidence of the company's work is a body of 2023–2024 news coverage of a genuine emergency: when a section of the King's Beach sea wall in Swampscott collapsed, the town hired Xtreme Shotcrete to spray concrete and stabilize the site immediately, with owner Michael Whitehead quoted directly by the Boston Globe about racing to stabilize the dirt before the tide returned, and later estimating the full repair at $300,000 to $800,000. Local news outlets covered the project through its final phase in 2024, when the company was still handling the remaining section of the wall — a substantial, verifiable track record of being trusted with complex, high-stakes structural concrete work on public infrastructure. The business carries an A+ rating from the Better Business Bureau with no complaints on file, though it is not BBB-accredited. Worth asking about before booking: BuildZoom's directory listing shows the company's General Contractor / Home Improvement Contractor license (#163328) as inactive, with an expiration date of May 2019 — a status that predates the 2023 Swampscott project, so it's worth confirming current licensing and insurance directly before hiring. Xtreme Shotcrete looks like the right call for sea wall, retaining wall, and structural concrete repair work, particularly waterfront and slope-stabilization jobs — the kind of specialized, technically demanding project a Massachusetts town trusted them with under real time pressure. Confirm current license status and get a written scope for anything beyond emergency stabilization.

What does basement waterproofing cost in Greater Boston?

Typical Greater Boston range for this kind of work, from regional averages — not a quote from Xtreme Shotcrete. Use it to sanity-check bids, then get the real number in writing.

The fix

Not sure which you need? Start with an inspection — many reputable companies assess free, and independent assessments run up to $500.

Perimeter to drain(linear ft)

The wall run getting the drain — a full 30×40 ft basement is about 140 ft.

Estimated range

$7,600 – $15,000

Typical waterproofing project around $11,300

What does basement waterproofing cost in Greater Boston?

Typical Greater Boston range for this kind of work, from regional averages — not a quote from Xtreme Shotcrete. Use it to sanity-check bids, then get the real number in writing.