Provider profile
Zavza Seal LLC
Provider snapshot
What this listing says
Long Island and Brooklyn homeowners dealing with basement water intrusion who want one company to handle waterproofing, mold removal, and structural repairs under a single 40-year warranty.
Best for
- Homeowners in Long Island, Brooklyn, or Queens who need mold removed and the underlying water problem fixed by one contractor.
- Properties with combined issues — basement flooding, foundation cracks, and mold growth — where coordinating multiple contractors would be impractical.
- Buyers who want utility rebate assistance (Con Edison, PSEG, National Grid, NYSERDA) bundled with their remediation project.
- Commercial property managers who need a contractor that handles both residential and commercial mold and water damage work.
About this company
Zavza Seal is a Long Island-based construction company headquartered in Bohemia, NY, with additional offices in Center Moriches, Farmingdale, and Brooklyn. Mold remediation is one division within a much broader operation that includes basement waterproofing, foundation repair, crawl space encapsulation, insulation, structural work, paving, and concrete. They serve Long Island (Nassau and Suffolk counties), Brooklyn, Queens, and the Bronx.
The mold-specific work includes removal, inspection and testing, odor control, dehumidification, and air purification. Their website references HEPA filtration systems and says most mold jobs take 1 to 5 days. Because they also do waterproofing and structural repair, they can address the water source that caused the mold in the first place — a genuine advantage, though it also means the same company is testing for mold and then selling you the remediation.
The company claims 30+ years of experience and holds a New York Mold Remediation Contractor License, BPI Goldstar certification, EPA Lead Safe Renovator License, and EPA Lead Paint certification. They offer a 40-year warranty on their work, financing options, and help with insurance claims. They also participate in utility rebate programs through Con Edison, PSEG, National Grid, and NYSERDA.
4.9 stars across 115 Google reviews is unusually strong. The volume is modest but the consistency is notable — the vast majority of reviewers describe responsive communication, clean job sites, and crews that come back to finish if needed. The negatives that do exist cluster around the sales process, not the work itself.
Services
Service area
Headquartered in Bohemia, NY (Long Island), with offices in Center Moriches, Farmingdale, and Brooklyn. Serves Suffolk County, Nassau County, Brooklyn, Queens, and the Bronx. Their website lists zip codes and neighborhoods across all five areas, with particularly dense coverage in Queens and Long Island.
Review consensus
Anderson draws the most praise by name — reviewers across at least eight reviews describe him managing projects from estimate through completion, communicating daily, and returning to address follow-up concerns. Jake handles estimates and project oversight and gets credit for transparency on pricing and process. Dice and Georgina in the office are praised for keeping customers updated and handling paperwork. Austin is named in multiple insulation and crawl space jobs for quality spray foam work. Reviewers consistently mention clean job sites, crews returning without extra charges when additional work was needed, and the 40-year warranty as a deciding factor.
4 found across 115 total reviews at 4.9★. Chris Casey (June 2026) went back and forth with Kris about a paver quote and never received one after three follow-ups over a week. Laura Foti (April 2026) had an appointment canceled at the last minute because the company failed to confirm it internally. Paul Palmeri (November 2025) left a 1-star with no text. Rockmacher Shermacher (July 2025), a Local Guide with 18 reviews, was told the job was too small based on photos and later found another company assessed it at over $2,500 in person. The company responded to none of these reviews.
The negative reviews share a common thread: all four complaints involve the pre-sale process, not the actual work. Nobody who hired Zavza Seal and had work done left a 1-star review in the last 18 months. This suggests the crews and project managers deliver, but the front-end sales pipeline drops leads — quotes go unsent, appointments get missed, and smaller jobs get screened out by photo. The 0% owner response rate on negatives is also notable for a company at 4.9 stars; they are not actively managing their reputation on the complaint side.
Anderson (project manager — consistently positive across 8+ reviews). Jake (estimator/project oversight — positive). Dice (office coordinator — positive). Georgina (office — positive). Austin (field technician, insulation/spray foam — positive). Bill (estimator — positive). Chris and Alex (field crew — positive). Brendan (field — positive). Danillo and Walter (crew — positive). Kris (sales/quoting — negative, unresponsive to quote request).
If you can get past the sales process, the actual work is strong — nobody who got the job done left a negative review recently. Ask for Anderson or Jake by name when scheduling. Confirm your appointment the day before, and if you do not receive your quote within 48 hours, call rather than waiting.
Keep in mind
- Zavza Seal does both mold testing and mold remediation. This is a conflict of interest — the company identifying the problem profits from fixing it. Consider getting an independent mold test before committing to their remediation scope.
- Three of their four recent 1-star reviews describe failures before work started: a quote that never arrived after multiple follow-ups, a no-show appointment blamed on the customer, and a refusal to visit a job deemed too small. The company did not respond to any of these complaints on Google.
- They enforce a $2,500 minimum and have turned away smaller jobs based on photos alone, without an in-person assessment.
- Mold remediation is one service among many — they are primarily a waterproofing and construction company. Ask whether the crew assigned to your mold job specializes in remediation or rotates across all their service lines.
- The office is closed weekends. If you have an active water or mold emergency on a Saturday, you will not reach them until Monday.