Basement problems don't announce themselves with fanfare; they start as a small crack, a damp corner, or a musty smell that's easy to dismiss. But in Long Island's coastal climate, where high water tables and seasonal soil shifts are constant threats, ignoring these early signs can spiral into structural damage, mold growth, and repair bills that climb into the tens of thousands. Homeowners dealing with foundation cracks, water intrusion, or crawl space moisture need solutions that address the root cause, not just surface symptoms. The right repair company should offer transparent inspections, proven waterproofing methods, and warranties that protect your investment for years to come.
Here's how the top options compare.
What Are Buyers Concerned About With Long Island Basement Repair Companies?
While professional basement repair companies offer essential services, homeowners consistently report several recurring concerns across public reviews:
Water intrusion issues can worsen rapidly if not diagnosed correctly, leading to repeated repairs and escalating costs.
Foundation damage left unaddressed may compromise structural integrity, decrease property value, and create safety hazards.
Mold growth from persistent moisture poses health risks and requires specialized remediation beyond basic waterproofing.
Delayed repairs often result in more extensive damage, turning manageable fixes into major reconstruction projects.
Inadequate drainage solutions fail to redirect water effectively, causing recurring basement flooding during heavy rainfall or seasonal groundwater changes.
TL;DR Long Island Basement Repair Companies at a Glance
Company | Best for | Key Advantage |
Premium Technical Services | Residential and commercial foundation repair | Unified brand offering foundation repair, basement waterproofing, and distribution services across Long Island |
E&M Basement Waterproofing | Family-focused waterproofing solutions | Over 45 years of family-operated service with a 10-year workmanship guarantee |
Boccia Inc. | Long-term commercial and residential projects | 70 years in business with a lifetime basement warranty and in-house crews |
ACM Basement Waterproofing | Local non-franchise waterproofing | Family-owned with owner-involved inspections and an A+ BBB rating |
Long Island Basement Waterproofing Pros | Emergency basement services | 24/7 customer support with a lifetime warranty on waterproofing systems |
1) Premium Technical Services - Comprehensive Foundation and Waterproofing Solutions Across Long Island
Premium Technical Services operates through three unified brands, Premium Technical Services, Complete Basement Systems, and Premium Foundation Supply, serving homeowners, contractors, and commercial clients throughout Nassau and Suffolk Counties. As a family-owned business based in Massapequa, NY, the company provides foundation repair, basement waterproofing, crawl space solutions, and commercial engineering services. Their residential services address water intrusion, structural concerns, and long-term foundation stability, while their commercial division handles underpinning, slab jacking, and helical pile systems for larger projects.
The company's integrated approach means homeowners can access foundation repair, waterproofing products, and contractor training through a single organization. This structure supports both immediate repair needs and ongoing maintenance across residential and commercial properties in the Long Island area.
Key Highlights:
Foundation repair services include underpinning, carbon fiber reinforcement, crack repair with epoxy and urethane injection, and helical pile installations
Basement waterproofing covers drainage systems, sump pumps, dehumidifiers, crawl space encapsulation, and waterproofing maintenance
Commercial services provide slab jacking, permeation grouting, structural engineering support, and advanced crack repairs for engineered projects
Distribution services supply helical piles, anchoring products, and equipment to contractors through Premium Foundation Supply
Educational resources include Foundation Repair 101, Slab Jacking 101, and specialized guides on helical piles for engineers
Why Choose Premium Technical Services
Premium Technical Services stands out for its ability to serve multiple client categories, homeowners, contractors, and commercial engineers, through a unified brand structure. Their service scope extends beyond typical basement repair to include product distribution, certified installer training, and contractor partnerships, making them a comprehensive resource for foundation and waterproofing needs across Nassau County, Suffolk County, and Greater New York City.
Customer Experience
"Had an excellent experience with Premium. They were responsive and professional throughout the entire project. I highly recommend" – Daniel Schilling (Google Reviews)
2) E&M Basement Waterproofing - Multi-Generational Family Expertise Since 1979
E&M Basement Waterproofing has served Long Island and New York City's five boroughs since 1979 as a family-owned waterproofing company. Founded by Ed Mihelic and Maria, the business began with a single dump truck and has grown to serve over 25,000 customers across Nassau County, Suffolk County, Queens, Brooklyn, and Manhattan. The company specializes in basement waterproofing, foundation waterproofing, drainage systems, sump pumps, crawl space solutions, and egress windows, with all work guaranteed for 10 years.
Ed continues to oversee field operations and project management while Maria manages administrative functions, maintaining hands-on family involvement throughout project planning and installation. The company uses VOLTEX waterproofing systems for exterior foundation protection, installs Zoeller sump pumps for basement drainage, and provides AprilAire dehumidifiers for moisture control in damp basements and crawl spaces.
Key Highlights:
Fully licensed and insured in Nassau County, Suffolk County, and New York City with a 10-year workmanship guarantee
VOLTEX waterproofing system provides long-term foundation protection with self-sealing sodium bentonite properties
Zoeller sump pumps offer durability and corrosion resistance with battery backup systems for electrical outages
Code-compliant egress window installations include integrated drainage protection and 10-year warranty coverage
Hand-digging methods reduce disruption to landscaping during French drain and drainage system installations
3) Boccia Inc. - Seven Decades of Waterproofing and Masonry Excellence
Boccia Inc. has provided waterproofing and masonry services throughout 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 completed thousands of residential and commercial projects. The company performs all work using in-house crews without subcontracting and introduced its patented Hollow Kick Molding Drainage System for basement waterproofing in 1986.
Residential services include basement waterproofing, crawl space waterproofing, foundation repairs, French drainage systems, vapor barrier systems, mold removal, and emergency egress windows. Commercial services cover facade waterproofing and restoration, parking garage waterproofing, stucco restoration, balcony waterproofing, and commercial roof repair. Through its affiliated engineering firm, Engineered Building Inspections P.C. (EBI), the company provides structural evaluations, construction drawings, and corrective solutions for building defects.
Key Highlights:
Licensed and insured with a New York State Mold Abatement Contractor license and Certified EIFS Industry Professional status
Lifetime basement warranty for waterproofing systems designed for long-term protection against water intrusion
In-house crews perform all waterproofing, drainage, masonry, restoration, and structural repair work without subcontracting
Professional engineering services through EBI include structural evaluations, parking garage assessments, and Local Law 11 support
Patented Hollow Kick Molding Drainage System provides specialized basement waterproofing solutions
4) ACM Basement Waterproofing - Local Expertise Without Franchise Overhead
ACM Basement Waterproofing has served Nassau and Suffolk Counties since 1991 as a family-owned, non-franchise company specializing in basement waterproofing, crawl space waterproofing, and foundation repair. Owner Mark McAlpin personally conducts inspections, recommendations, and estimates, providing direct customer interaction and property-specific repair solutions. The company holds an A+ Better Business Bureau rating and is one of only three companies in New York State to receive the Basement Health Association Star Award.
ACM installs interior basement waterproofing systems, including French drains, sump pump systems, battery backup pumps, vapor barriers, basement encapsulation, and egress windows. The company is licensed in Nassau and Suffolk Counties, with no complaints filed with consumer affairs in either county. Services extend to Brooklyn and the Bronx for select projects.
Key Highlights:
Owner-involved inspections ensure direct evaluation of basement, crawl space, and foundation problems before repairs
Licensed in Nassau and Suffolk Counties with zero consumer affairs complaints and an A+ BBB rating
Basement Health Association member with Certified Waterproofing Specialists and Star Award recognition
Interior waterproofing systems include French drains, sump pumps, vapor barriers, and basement encapsulation
Foundation repair services address cracked, bowing, and leaning walls with carbon fiber reinforcement systems
5) Long Island Basement Waterproofing Pros - Round-the-Clock Emergency Support
Long Island Basement Waterproofing Pros specializes in commercial and residential basement waterproofing throughout Nassau and Suffolk Counties. Founded by a Long Island native with over 20 years of experience in waterproofing and drainage systems, the company provides basement waterproofing, basement crack repair, foundation repair, crawl space waterproofing, sump pump installation, and French drain installation. Customer support is available 24 hours a day, 7 days a week for service inquiries, consultations, and emergency basement concerns.
The company offers free estimates and onsite inspections, thoroughly assessing structural concerns, drainage problems, water penetration, and foundation damage before recommending repair solutions. Services include interior and exterior drainage, foundation crack injections, waterproof coatings, vapor barriers, crack injection systems, sump pump systems, and ventilation systems designed to protect buildings from water damage, flooding, and structural deterioration.
Key Highlights:
24/7 customer support available for emergency basement concerns, consultations, and scheduling assistance
Lifetime warranty on basement waterproofing services and systems for residential and commercial properties
Emergency services address flooded basements, active water intrusion, and urgent waterproofing concerns
Comprehensive inspection process evaluates moisture conditions, cracks, hydrostatic pressure, and drainage issues
Crack repair methods include epoxy injection, polyurethane injection, and FlexiSpan flexible sealant systems
The Verdict: Which Basement Repair Company Should You Choose? (Our Top 3 Picks)
After reviewing service offerings, warranties, and operational approaches across Long Island's basement repair market, three companies stand out for different homeowner needs.
Premium Technical Services is a strong choice for homeowners looking for comprehensive foundation repair and waterproofing services. Through its connected brands, the company offers solutions ranging from crawl space encapsulation and drainage systems to foundation stabilization, making it well-suited for projects that require a broader range of expertise.
Boccia Inc. stands out for homeowners who value long-term experience and in-house project management. With decades of family ownership, a lifetime basement warranty, and no subcontracted labor, the company is a good fit for properties that may require both waterproofing and structural repair work.
E&M Basement Waterproofing offers a balance of experience, warranty coverage, and proven waterproofing systems. With more than 45 years in business and specialized solutions such as VOLTEX waterproofing and Zoeller sump pumps, it remains a dependable option for homeowners across Long Island.
The best choice depends on your property's needs, project complexity, and warranty preferences. Comparing service offerings, inspection processes, and warranty terms can help you select the company that best fits your basement repair goals.
