Licensed & Insured Lic #219682  |  Serving Greater Boston

GREATER BOSTON FOUNDATION CONTRACTORS

Foundation Repair Done Right — Cracks, Settling & Waterproofing

Licensed Boston foundation contractors fixing structural issues at the source. Free on-site inspection, transparent quotes, and lasting repairs.

FreeOn-Site Inspection
48 hrQuote Turnaround
Lic #219682MA Licensed

Get your Free foundation Estimate

Tell us what’s going on-we’ll call back within one business day.

⚠ See a foundation crack? Small cracks become major repairs fast. Call (617) 778-8299

FOUNDATION CRACK GUIDE

Is Your Foundation Crack Serious?

Not every crack means disaster — but some signal structural failure. Here's how to read what you're seeing.

Common

Hairline Vertical Cracks

Thin, vertical cracks from normal concrete curing. Usually cosmetic — but seal them before water gets in.

→ Recommended: Sealing
Monitor

Diagonal Cracks

Cracks running at an angle often indicate uneven settling. Should be assessed by a foundation contractor.

→ Recommended: Inspection
Urgent

Horizontal Cracks

A red flag. Horizontal cracks signal serious pressure from outside — possible wall failure if untreated.

→ Required: Professional repair
Urgent

Stair-Step Cracks (Block)

Diagonal cracks following mortar joints in block foundations indicate movement and need immediate attention.

→ Required: Professional repair
Common

Water-Seeping Cracks

Any crack letting water through needs waterproofing — left alone, it'll damage the foundation and basement.

→ Recommended: Injection repair
Urgent

Wide / Growing Cracks

Cracks wider than 1/4 inch or that have grown since you first noticed them require structural assessment.

→ Required: Professional repair
COMPLETE FOUNDATION SERVICES

Full-Service Foundation Contractors

From single-crack repair to full foundation waterproofing — one licensed Boston team handles it all.

Foundation Crack Repair

Permanent repair of cracks in concrete and block foundations using proven injection methods.

  • Epoxy injection (structural)
  • Polyurethane injection (water-stopping)
  • Carbon fiber reinforcement
  • Surface sealing & finishing

Foundation Waterproofing

Stop water at the source with interior and exterior waterproofing systems built for New England weather.

  • Exterior membrane waterproofing
  • Interior drainage systems
  • Sump pump installation
  • French drains & exterior grading

Structural Repair

Restore failing foundations with proven reinforcement methods backed by engineering best practices.

  • Bowing wall reinforcement
  • Settling & sinking repair
  • Underpinning & shoring
  • Load-bearing wall restoration

Inspection & Assessment

Honest evaluation of what's actually wrong — and what isn't — before any work is recommended.

  • Free on-site inspection
  • Written assessment report
  • Transparent line-item quote
  • No high-pressure sales
WHY HARBORLINE

Boston's Trusted Foundation Contractors

Foundation work isn't where you want to cut corners. Here's why Greater Boston homeowners trust us with their most important structural repairs.

  • Licensed & Insured

    MA License #219682, fully insured. Documentation available on request.

  • Diagnose Before We Quote

    We identify the root cause, not just the symptom. You get an accurate quote.

  • Proven Repair Methods

    Industry-standard techniques: epoxy injection, exterior waterproofing membranes, structural reinforcement.

  • $

    No Surprise Pricing

    Written quotes broken down by line item. What we quote is what you pay.

100%
Customer Satisfaction Focus
Free Inspections
48 hr Quotes
OUR PROCESS

From Inspection to Permanent Repair

Transparent, guided, and built to last — no surprises, no shortcuts.

01

Free Inspection

On-site visit to assess the crack, settling, or water issue and identify the real cause.

02

Written Quote

Detailed line-item estimate explaining the recommended fix, timeline, and total cost.

03

Expert Repair

Licensed crew completes the work using proven materials and industry-standard techniques.

04

Final Walkthrough

Quality check, full cleanup, and you sign off only when you're satisfied.

REAL HOMEOWNERS

What Boston Homeowners Are Saying

★★★★★

"We hired them for foundation repair and waterproofing after years of basement leaks. Their team explained everything clearly and completed the project faster than expected."

— Chester G.
★★★★★

"Professional, on time, and cleaned everything perfectly after the job. They identified a foundation crack we'd missed and fixed it properly. Highly recommended!"

— Carol C.
★★★★★

"Very reliable contractor. They diagnosed the real source of our settling issues — not just patched the visible damage. Communication throughout was excellent."

— Julian K.
COMMON QUESTIONS

Foundation Repair FAQ

How do I know if my foundation crack is serious?
Vertical hairline cracks are usually cosmetic. Horizontal cracks, stair-step cracks in block walls, cracks wider than 1/4 inch, or any crack that's actively growing or leaking water signal structural concern. When in doubt, get a free inspection — diagnosing the wrong type wastes money on the wrong fix.
How much does foundation repair cost in Boston?
Cost varies widely based on the issue. Minor crack injection typically runs a few hundred to low thousands. Full foundation waterproofing and structural repairs can range from $5,000 to $25,000+ depending on scope. We'll give you an exact written quote after the free on-site inspection — no estimates over the phone.
What's the difference between foundation repair and foundation waterproofing?
Foundation repair addresses structural issues — cracks, bowing walls, settling. Foundation waterproofing stops water from getting through the foundation. They often go together: a cracked foundation needs both structural repair AND waterproofing to prevent recurrence. We handle both.
How long does foundation repair take?
Crack injection repairs typically take a few hours to a single day. Full foundation waterproofing or major structural repairs usually take 2–7 days depending on scope. We'll give you a precise timeline in your written quote.
Do you provide free foundation inspections?
Yes. Every inspection is free and no-obligation. We come on-site, assess the issue, and provide a written quote. No high-pressure sales tactics.
What areas do you serve?
We serve Greater Boston and surrounding Massachusetts communities — including Boston, Cambridge, Somerville, Brookline, Newton, Quincy, Medford, Malden, Watertown, and beyond. Call to confirm we service your specific town.
Are you licensed and insured?
Yes. Harborline Foundation & Brickwork is fully licensed (MA Lic #219682) and insured. We're happy to provide documentation — and encourage you to verify any contractor you hire.

Don't Let a Small Crack Become a Major Repair

Foundation problems only get worse — and more expensive — over time. Get your free inspection today.

(617) 778-8299

Harborline Foundation & Brickwork  |  MA Lic #219682  |  Serving Greater Boston  |  (617) 778-8299  |  Harborlineinfo@gmail.com