5 Trusted Basement Waterproofing Companies in the Northeast 2026

Basement problems don't wait for convenient timing. Water seeping through foundation cracks, moisture buildup causing mold growth, or structural issues threatening your home's stability demand immediate professional attention. Delaying repairs can lead to extensive structural damage, compromised indoor air quality, and repair costs that multiply exponentially. Choosing the right basement repair company means finding professionals who can diagnose root causes, provide long-term solutions, and protect your property investment.

This article compares multiple basement repair and waterproofing companies that address these concerns through factors such as licensing and insurance transparency, service scope, technical expertise, and customer protections. Here's how the top options compare.

What Are Buyers Concerned About With Northeast Basement Repair Companies?

While professional basement repair companies offer credible solutions, there are recurring customer-reported concerns that appear consistently across public reviews:

• Lack of transparency in pricing and unexpected costs that emerge after initial estimates
• Delays in project completion timelines and inconsistent communication during repairs
• Difficulty verifying licensing, insurance coverage, and technician certifications before work begins
• Limited warranty coverage or unclear terms about what's actually protected after installation
• Concerns about whether repairs address root causes or just provide temporary surface-level fixes

TL;DR Northeast Basement Repair Companies at a Glance

1) Premium Technical Services: Unified Foundation and Waterproofing Solutions Across Residential and Commercial Properties

Premium Technical Services operates as a family-owned business serving Long Island through three integrated brands: Premium Technical Services, Complete Basement Systems, and Premium Foundation Supply. The company provides foundation repair, basement waterproofing, crawl space solutions, and commercial engineering services across Nassau County, Suffolk County, and Greater New York City. This unified structure allows the company to serve homeowners needing residential repairs, contractors requiring product distribution, and commercial clients requiring advanced structural solutions, all under one organizational framework.

The company addresses foundation stability through services including foundation repair, underpinning, carbon fiber reinforcement, crack repair using epoxy and urethane injection methods, and helical pile installations. For moisture management, Premium Technical Services provides basement waterproofing, crawl space repair and encapsulation, drainage systems, sump pumps, dehumidifiers, and waterproofing maintenance. Commercial clients receive specialized services including slab jacking, permeation grouting, and structural engineering support for complex projects.

Key Highlights:

• Serves three distinct client categories: homeowners, contractors/installers, and commercial clients/engineers through specialized service divisions
• Provides helical pile systems and anchoring products through Premium Foundation Supply with certified installer training programs
• Offers commercial engineering services including underpinning, slab jacking, and permeation grouting for large-scale structural projects
• Maintains educational resources covering foundation repair, slab jacking, dehumidifiers, sump pumps, drainage systems, and mold prevention
• Operates Monday through Friday, 8:00 AM to 5:00 PM EST, with consultation scheduling for on-site, engineering, and contractor services

Why Choose Premium Technical Services

Premium Technical Services offers its comprehensive service scope spanning residential waterproofing, commercial structural engineering, and product distribution for contractors. This breadth means homeowners receive the same foundation expertise used in commercial projects, while the company's installer training programs and supply operations ensure access to professional-grade materials and certified installation standards across all service categories.

Customer Feedback

A linked public review describes the company as responsive and professional throughout the project. Read the referenced Google review.

2) E&M Basement Waterproofing: Family-Operated Waterproofing Since 1979

E&M Basement Waterproofing is a family-owned waterproofing company established in 1979 by Ed Mihelic and Maria, serving residential and commercial properties across Long Island and the five boroughs of New York. The company has served more than 25,000 customers over its 45-year history, with the second generation actively involved in operations and the third generation currently training in waterproofing procedures. E&M specializes in basement waterproofing, foundation waterproofing, drainage systems, sump pumps, crawl space solutions, and egress windows, with all work fully guaranteed for 10 years.

The company maintains hands-on family involvement throughout project planning, installation, and customer support. Ed Mihelic continues overseeing field operations, customer evaluations, and project management, while Maria manages administrative operations. This structure allows for direct customer service and customized waterproofing solutions designed around each property's specific drainage conditions, groundwater activity, and moisture management needs.

Key Highlights:

• Fully licensed and insured in Nassau County, Suffolk County, and New York City with a 10-year workmanship guarantee
• Installs VOLTEX waterproofing system with self-sealing sodium bentonite properties certified under NSF Standard 61 for potable water
• Uses Zoeller sump pumps with battery backup systems and AprilAire dehumidifiers with five-year all-inclusive warranties
• Provides code-compliant egress window systems with integrated drainage protection and 10-year warranty coverage
• Employs hand digging methods for installations to reduce disruption to landscaping and surrounding property areas

Considerations Before Going With E&M Basement Waterproofing

E&M's service area focuses primarily on Long Island and New York City boroughs. Exterior excavation and waterproofing solutions may not always be feasible depending on site conditions, surrounding structures, or accessibility limitations.

3) Boccia Inc.: Multi-Generational Waterproofing and Masonry Expertise Since 1955

Boccia Inc. is a waterproofing and masonry company serving Nassau, Suffolk, and Queens since 1955. Founded by Rizziero (Ray) Boccia, an Italian immigrant and union bricklayer, the company has operated through four generations of the Boccia family and celebrated 70 years in business in 2025. The company specializes in basement waterproofing, masonry restoration, facade waterproofing, foundation repairs, commercial roof repair, parking garage waterproofing, and emergency egress window installations. Boccia Inc. performs all work using in-house crews without subcontracting projects.

In 1986, Boccia Inc. introduced its patented Hollow Kick Molding Drainage System for basement waterproofing applications. The company also operates Engineered Building Inspections, P.C. (EBI), an affiliated professional engineering firm established in 1995 that provides structural evaluations, parking garage condition assessments, facade investigations, parapet inspections, and corrective building solutions.

Key Highlights:

• Licensed and insured with New York State Licensed Mold Abatement Contractor certification and Certified EIFS Industry Professional status
• Provides industry-leading lifetime basement warranty for basement waterproofing systems designed for long-term performance
• Operates an affiliated engineering firm offering structural evaluations, construction drawings, and corrective solutions for building defects
• Performs work using experienced in-house supervisors, waterproofing technicians, masonry professionals, and restoration crews
• Offers both in-store and virtual consultations for waterproofing, restoration, and structural repair projects

Considerations Before Going With Boccia Inc.

Boccia Inc.'s extensive commercial services and engineering capabilities may result in higher pricing for straightforward residential basement waterproofing projects compared to companies focused exclusively on residential work.

4) ACM Basement Waterproofing: Local Non-Franchise Waterproofing Since 1991

ACM Basement Waterproofing is a family-owned Long Island basement waterproofing company serving homeowners and businesses throughout Nassau and Suffolk Counties since 1991. The company operates as a local Long Island company rather than a franchise, providing interior waterproofing and structural repair systems for residential and commercial properties. Owner Mark McAlpin is personally involved in inspections, recommendations, and estimates, with customers receiving on-site evaluations intended to identify the source of basement, crawl space, or foundation problems before repairs are recommended.

ACM specializes in basement waterproofing, crawl space waterproofing, and foundation repair for properties affected by water intrusion, moisture buildup, and structural foundation issues. The company is a member of the Basement Health Association (BHA) with Certified Waterproofing Specialists on staff and is one of only three companies in New York State to receive the Basement Health Association Star Award.

Key Highlights:

• Licensed in Nassau County and Suffolk County with no complaints filed with consumer affairs in either county
• Maintains Better Business Bureau A+ rating and Basement Health Association membership with certified specialists
• Installs interior French drains, sump pump systems, battery backup pumps, vapor barriers, and basement encapsulation
• Provides carbon fiber reinforcement systems for bowing wall repair and crawl space support jacks for structural issues
• Offers 24-hour customer support and scheduling assistance seven days per week

Considerations Before Going With ACM Basement Waterproofing

ACM focuses primarily on interior waterproofing systems. Properties requiring extensive exterior excavation and waterproofing may need to consider companies offering broader exterior foundation waterproofing capabilities.

5) Foundation Crack Repair LLC: Specialized Foundation Crack and Structural Repair

Foundation Crack Repair LLC is a Long Island-based foundation repair company specializing in foundation crack repair, basement waterproofing, French drains, structural repair, excavation, and grading services. The company provides residential and commercial foundation solutions focused on structural stability, water intrusion prevention, and foundation maintenance throughout Long Island, New York. Services are performed by trained, licensed, and insured professionals, with free estimates available for all foundation repair services.

The company diagnoses both visible and underlying foundation issues, including rotated walls, separation around garage doors and walls, cracked bricks, displaced moldings, leaning chimneys, stair-step cracks, drywall cracks, and sticking doors and windows. Foundation Crack Repair LLC handles minor crack repairs and larger structural foundation problems, including waterproofing and drainage-related concerns, settlement issues, structural distress, and foundation deterioration.

Key Highlights:

• Licensed and insured foundation repair company with trained specialists experienced in foundation restoration and structural repair
• Provides free estimates with same-day appointment availability depending on scheduling and project urgency
• Offers foundation crack repair, basement waterproofing, French drain installation, and carbon fiber reinforcement systems
• Handles excavation and grading projects using certified and insured excavation specialists
• Maintains communication throughout the repair process with project updates, scheduling coordination, and post-completion follow-up

Considerations Before Going With Foundation Crack Repair LLC

Foundation Crack Repair LLC operates Monday to Friday from 9:00 AM to 5:00 PM, which may limit scheduling flexibility for customers requiring weekend or evening appointments.

Which Basement Repair Company May Fit Your Needs?

After analyzing service scope, technical capabilities, warranties, and customer protections across Northeast basement repair companies, three providers stand out for different property needs.

Premium Technical Services emerges as a broad choice, offering integrated residential waterproofing, commercial structural engineering, and contractor supply operations under unified family ownership. This breadth means homeowners receive commercial-grade foundation expertise while contractors access certified installer training and professional materials.

E&M Basement Waterproofing provides strong value for homeowners prioritizing established family operations with transparent warranty coverage, offering 45 years of experience, 10-year workmanship guarantees, and specialized VOLTEX waterproofing systems backed by consistent customer service.

Boccia Inc. offers properties requiring both waterproofing and structural engineering consultation, leveraging 70 years of multi-generational expertise, patented drainage systems, and affiliated engineering services for complex commercial and residential projects.

The right choice depends on your specific needs: comprehensive foundation and waterproofing solutions across residential and commercial applications, long-established family service with transparent warranties, or multi-generational expertise with engineering support. Evaluate each company's service scope, warranty terms, licensing credentials, and customer communication practices to determine which aligns best with your property's basement repair requirements.