When it comes to protecting and improving your property, you don’t just need a contractor, you need a partner who understands structure, safety, and longevity from the ground up. For over a decade, Zavza Seal has been Long Island’s go-to team for full-scale construction, waterproofing, and flood resilience projects that stand the test of time.
From foundations to finishes, every project we take on is engineered for durability, energy efficiency, and long-term performance. Our crews are licensed, insured, and trained to the highest safety and engineering standard; the same ones trusted by architects, property managers, and homeowners across Suffolk and Nassau Counties.
We’re more than builders; we’re problem-solvers. Whether it’s stabilizing a sinking foundation, sealing out water intrusion, or elevating a coastal home above flood level, Zavza Seal combines innovation with integrity to deliver results that last.
Looking for a Contractor You Can Trust to Get It Right the First Time? Zavza Seal Delivers Proven Solutions Built to Perform in New York’s Toughest Conditions. Request Your Free Estimate Today.
What Makes a True “General Contractor”?
A general contractor is more than just a builder, they’re the licensed professional responsible for coordinating every phase of a project, from design and permitting to safety oversight, scheduling, and final inspection. The general contractor serves as the central point of accountability, managing all trades, ensuring compliance with building codes, and keeping the project on time and within budget.
But not all contractors operate at the same level. Many focus solely on one trade; roofing, drywall, or finishes, leaving gaps in project management and quality control. Zavza Seal bridges that divide. We unite both structural integrity and finishing expertise under one roof, meaning every detail, from the foundation footing to the final coat of paint is built for performance and longevity.
Our Core Areas of Expertise
Every successful project starts with specialization. Zavza Seal’s divisions are built around the systems that determine a property’s safety, comfort, and long-term durability.
Waterproofing & Drainage Systems
From basements to crawl spaces, our engineered waterproofing systems stop leaks before they start. We use vapor barriers, sump systems, and moisture mapping technology to prevent water intrusion and mold growth, protecting both your structure and indoor air quality.
Foundation & Structural Repair
When the ground shifts, everything above it follows. Our crews repair cracked foundations, stabilize sinking slabs, and reinforce load-bearing walls using helical piers, underpinning, and concrete restoration methods trusted by engineers across New York.
Flood Resilience Retrofitting
For coastal and low-lying properties, we design complete flood protection systems, from steel sheet pile and retaining walls to home elevation and commercial drainage upgrades. Every solution is FEMA-compliant and tailored to Long Island’s unique coastal conditions.
Insulation & Energy Efficiency Upgrades
Energy efficiency starts with air sealing. We install closed-cell and spray-foam insulation that exceeds New York’s energy codes, helping homeowners reduce heating and cooling costs year-round.
Exterior Restoration & Roofing
Our exterior teams handle everything from masonry and façade repair to roofing and siding replacements. Each system is finished with code-approved waterproof membranes for lasting protection and curb appeal. Every service we offer is handled in-house by licensed specialists, no middlemen, no subcontracting delays.
Team Up with Long Island’s Leading General Contractor. Contact Us Now to Discuss Your Project!
Our Track Record Across Long Island, Brooklyn, Queens, and The Bronx
What separates Zavza Seal from the rest isn’t just experience. It’s our results. And our dedication. Our work is backed by measurable performance data, cutting-edge inspection tools, and hundreds of satisfied clients who trust our precision and accountability. And honestly, it’s because we have to get it right.
Here are some of the reasons we think we’re the best contractor in Long Island:
- 15+ years serving Long Island and the NYC boroughs
- 1,000+ completed projects with verified 5-star satisfaction ratings
- 50+ FEMA-compliant flood resilience installations
- 25% average insurance savings for retrofitted homes and buildings
Every project begins with a detailed inspection using moisture mapping, thermal imaging, and load-bearing analysis, ensuring your structure is evaluated scientifically, not guesswork.
Book Your On-Site Inspection Today and Receive a Complete Moisture or Structural Analysis Report Outlining Your Property’s Risk Profile and Recommended Upgrades.
Licensed, Certified, and Verified
When you hire Zavza Seal, you’re hiring a certified team that meets and exceeds every professional, safety, and compliance standard in the industry. Our credentials reflect our commitment to doing things the right way, every time:
- NYS Licensed & Insured General Contractor: Fully authorized to manage residential and commercial projects throughout New York State.
- EPA Lead-Safe Certified Firm: Protecting your home and environment during restoration and remodeling.
- IICRC Certified: Specialists in water damage restoration and mold remediation.
- FEMA Compliant: Floodproofing and mitigation systems designed to meet national resilience standards.
- OSHA Safety Certified Crews: Safety is built into every phase of our work, from excavation to final inspection.
Why Zavza Seal Leads Long Island Construction
The difference between an average contractor and a great one comes down to process, precision, and accountability. Here’s why Zavza Seal continues to set the benchmark for general contracting across Long Island:
- Integrated Project Management
From design to delivery, one dedicated team oversees every step. This unified workflow reduces communication errors, prevents change-order delays, and guarantees consistency in execution.
- Local Knowledge & Compliance Expertise
We understand the building codes, flood zones, and permitting requirements unique to Suffolk and Nassau Counties. That insight speeds up inspections, minimizes red tape, and ensures your project stays fully compliant.
- Quality-First Engineering Approach
Every system we build, from a foundation to a roofline, is designed using measurable performance metrics like R-value, PSI load, and permeability. Our construction methods follow ASTM and ASCE standards for durability and safety.
- Customer Transparency
We keep clients informed through every phase with digital progress tracking, clear documentation, and upfront pricing. No hidden costs, no surprises, just results.
- End-to-End Solutions
Most contractors handle one piece of the puzzle. Zavza Seal delivers them all; construction, waterproofing, floodproofing, insulation, and restoration, ensuring each system supports the others for maximum longevity.
- Community and Environmental Commitment
Zavza Seal builds stronger homes and a stronger Long Island through sustainable, eco-friendly practices. We use low-VOC materials, energy-efficient systems, and smart stormwater designs to protect air quality, waterways, and coastal communities.
Build Smarter. Hire the Long Island Contractor That Understands Your Structure From the Soil Up: Zavza Seal.
Case Study: Chimney Stabilization and Waterproofing in North Bellmore, NY
A homeowner in North Bellmore contacted Zavza Seal LLC after noticing their chimney was leaning and water was seeping in through deteriorated joints. Our inspection revealed foundation settlement, failed sealants, and crumbling mortar. Immediate action was needed to prevent structural failure.
Zavza Seal executed a five-step solution: old sealants were replaced with structural-grade epoxy and joint sealant; the chimney was ground and repointed with color-matched mortar; a new cement crown was installed; full-surface waterproofing was applied; and two helical piles were driven to 20-ton capacity to stabilize the foundation.
The result: a fully stabilized chimney, watertight structure, and restored aesthetics. In areas like North Bellmore, where soil shifts and moisture are common, addressing early signs of foundation or chimney damage is critical.
Need an Expert Inspection? Book Your Free Assessment Today.
Client Testimonials and Reputation Highlights
Our reputation is built on trust, craftsmanship, and consistency. Here’s what homeowners and businesses across Long Island are saying:
“I was looking for a reliable company to encapsulate a crawl space under an extension on my house. After reading reviews I decided on Zavza Seal. From initial contact with Georgina through to the actual work, they were friendly, professional and completed the job right. The project manager Anderson should up with his crew when expected, told me what they were going to do and how they were going to do it. Invited me to take a look at the work while in-progress and made sure I was continuously updated. Will use them again for other basement needs.” – Dino. (see Dino’s review on Google Maps.)
“We had a mystery seepage in our basement–one area soaked once or twice a year. the patch would be completely dry 360 degrees around it. Bill diagnosed the problem, set in motion a solution, and Anderson executed results thoroughly and impressively. I look forward to not seeing dampness in the basement. Many thanks!” – Stephen. (see Stephen’s review on Google Maps.)
Zavza Seal proudly maintains 5-star ratings on Google and HomeAdvisor, an A+ BBB accreditation, and is recognized as a Google Guaranteed business.
See Why Homeowners Across Long Island Trust Zavza Seal to Protect and Rebuild What Matters Most. Contact Us Any Time You Need Help With Your Home or Business.
Need a Mold Free Basement or Structural Repair? Schedule Your Free Assessment with the #1 General Contractor in Long Island, NY
Zavza Seal is your local partner in safety, efficiency, and long-term property value. Every project we take on reflects our belief that construction is about trust, craftsmanship, and care. Whether you’re planning a renovation, foundation repair, or full waterproofing upgrade, our licensed team is ready to deliver results that last for generations.
Don’t Settle for Average, Build With the #1 General Contractor on Long Island. Book Your Free Consultation Today.
