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Waterproofing · New York, NYLast reviewed October 2026

4 Best Waterproofing Companies in New York, NY (2026)

TenBestFind ranks 4 waterproofing contractors in New York, NY. Each company was checked against the criteria set out under How we chose. Lists name up to ten companies, and this one stops at 4 because only 4 met them. The list was last reviewed on October 21, 2026.

HRC Waterproofing of Jamaica, Queens leads our New York list with 4.9 stars from 81 Google reviews, followed by A.M. Shield Waterproofing at 5.0 from 223. Four basement and foundation specialists cleared our bar of 4.5 stars, 50 reviews and a real staffed office, and we list them in Google's order as read on October 21, 2026.

4 companies reviewed4 rankedHow We Rank

The Ranking

Our top 4 waterproofing contractors in New York

New York basements leak for three main reasons: old brick and stone foundations with failed mortar, high water tables in low-lying parts of Queens, Brooklyn and Staten Island, and sewer or drain backups after heavy rain. The fixes range from interior French drains and sump pumps to epoxy crack injection and exterior membranes. New York City requires a Home Improvement Contractor licence for residential work, and you can check any contractor on the Department of Consumer and Worker Protection lookup at nyc.gov before you sign.

Showing 4 of 4
  1. 01

    Best for Queens and Brooklyn basements with recurring flooding

    HRC Waterproofing

    4.9(82 Google reviews)
    Best forQueens and Brooklyn basements with recurring flooding
    In business28 years
    WarrantySite says its work is warrantied and that warranties are transferable to future buyers; no warranty length is published.
    EmergencyAvailable

    Why we picked them

    4.9 from 81 Google reviews, with a site that names its exterior membranes and lists full drainage, sump pump and crack injection scope from a Jamaica, Queens base.

    What we like

    • Names its exterior membranes, including Polyguard 650 and Tremco Watchdog
    • Open 24 hours, seven days a week
    • Reviewers credit Raymond for walking the property and explaining options

    Things to consider

    • No licence number, warranty length or named team is published on the website.
    Key details
    Best for
    Queens and Brooklyn basements with recurring flooding
    Service area
    New York
    Address
    116-14 142nd St, Jamaica, Queens
    Years in business
    28 years
    Warranty
    Site says its work is warrantied and that warranties are transferable to future buyers; no warranty length is published.
    Emergency service
    Available
    Financing
    Available
    Credentials
    Licensed and insured (self-reported, no number published)
  2. 02

    Best for basement leaks and window wells in Queens and Nassau homes

    A.M. Shield Waterproofing Corp.

    5.0(222 Google reviews)
    Best forBasement leaks, drainage and window wells in Queens and Nassau homes
    In business31 years
    WarrantyLifetime guarantee on most services per the company website; terms not published, ask for them in writing.
    EmergencyNot listed

    Why we picked them

    5.0 from 223 Google reviews, with a CWS certified president and general manager and 30 years of Long Island work.

    What we like

    • President and general manager both hold the CWS credential
    • Operating since 1995, with a Tegra-Tite 500 exterior membrane
    • Reviewers name crew members and praise cleanup

    Things to consider

    • Based in Albertson on Long Island, and the site names only Queens among the five boroughs.
    Key details
    Best for
    Basement leaks, drainage and window wells in Queens and Nassau homes
    Service area
    New York
    Address
    33 Albertson Ave, Albertson, NY
    Years in business
    31 years
    Warranty
    Lifetime guarantee on most services per the company website; terms not published, ask for them in writing.
    Financing
    Available
    Credentials
    Certified Waterproofing Specialist (CWS), Hugo D'Esposito and Jonathan Sorscher
  3. 03

    Best for cracked poured concrete basement walls on Staten Island

    B Altmans Waterproofing

    4.8(139 Google reviews)
    Best forCracked poured concrete basement walls on Staten Island
    In business34 years
    WarrantyLifetime transferable guarantee on services, as stated on the company website
    EmergencyNot listed

    Why we picked them

    4.8 from 139 Google reviews, and it injects epoxy through the full wall thickness.

    What we like

    • Full-wall epoxy injection instead of surface patches or trench drains
    • Family owned on Staten Island since 1992
    • Lifetime transferable guarantee, reportedly honored after a first repair fell short

    Things to consider

    • Also runs a Nashville operation, so confirm which crew will do your job.
    Key details
    Best for
    Cracked poured concrete basement walls on Staten Island
    Service area
    New York
    Address
    304 Gower St building b, Staten Island, NY
    Years in business
    34 years
    Warranty
    Lifetime transferable guarantee on services, as stated on the company website
    Credentials
    Better Business Bureau member (as stated by the company)
  4. 04

    Best for Queens and Nassau basements needing engineered drainage

    BOCCIA - Waterproofing & Masonry Specialists

    4.8(133 Google reviews)
    Best forQueens and Nassau basements needing engineered drainage
    In business71 years
    WarrantyThe company's site advertises a lifetime warranty and industry leading warranties, without published terms. Ask for the written terms.
    EmergencyNot listed

    Why we picked them

    4.8 from 134 Google reviews, family owned since 1955, with a patented drainage system.

    What we like

    • Patented Dryedge Floor Guard drainage, installed since 1986
    • Four generations since 1955, with Professional Engineers on staff
    • Site names Queens neighbourhoods and handles DOB filings

    Things to consider

    • Based in Nassau County, and the site lists only northeastern Queens, not Brooklyn, Staten Island or Manhattan.
    Key details
    Best for
    Queens and Nassau basements needing engineered drainage
    Service area
    New York
    Address
    168 Broadway, Garden City Park, NY
    Years in business
    71 years
    Warranty
    The company's site advertises a lifetime warranty and industry leading warranties, without published terms. Ask for the written terms.
    Credentials
    BBB A+ accredited business

Side by Side

Compare the top waterproofing contractors in New York

Ranking position reflects our editorial review, not customer ratings.

Editorial comparison of the 4 ranked companies. Customer ratings, where shown, come from the source named on each company profile.
RankCompanyBest forKey servicesService areaGoogle ratingEmergencyProfile
01HRC WaterproofingQueens and Brooklyn basements with recurring floodingNew York4.9(82)YesView
02A.M. Shield Waterproofing Corp.Basement leaks, drainage and window wells in Queens and Nassau homesNew York5.0(222)Not listedView
03B Altmans WaterproofingCracked poured concrete basement walls on Staten IslandNew York4.8(139)Not listedView
04BOCCIA - Waterproofing & Masonry SpecialistsQueens and Nassau basements needing engineered drainageNew York4.8(133)Not listedView

Coverage

Waterproofing companies serving New York and nearby areas

Most companies in this ranking work across New York and the surrounding suburbs. Coverage and travel fees vary, so confirm your address is inside the service area before scheduling.

  • New York

Nearby rankings

Service coverage across New York. Individual company areas are listed on each profile.

Methodology

How we chose the best waterproofing contractors in New York

Companies are listed in the order Google returned them for basement waterproofing searches in New York on October 21, 2026. Each had at least 4.5 stars, 50 Google reviews, an operating status, a working website, a street address and a New York City service area named on its own site. Many New York results are roofers, masonry crews or general contractors who list waterproofing as a side service, and those were left out. Two firms are based in Nassau County on Long Island, and each listing says so. Only four firms qualified, so the list has four entries rather than ten.

Read our full ranking methodology
Evaluated4
Ranked4

Hiring

How to choose a waterproofing contractor in New York

  1. Verify insurance and credentials

    Ask for a current certificate of insurance and confirm registration or licensing with the authority that issues it, not with the company.

  2. Ask for a written estimate

    Scope, materials, removal, disposal and who pulls the permit should all be named on the page rather than agreed on the doorstep.

  3. Compare multiple quotes

    Two or three bids on the same scope. A number far below the others usually means something has been left out of it.

  4. Understand the warranty

    Separate the manufacturer's warranty on materials from the company's own warranty on the work, and get both in writing.

  5. Ask who performs the work

    Find out whether the crew are employees or subcontractors, and who supervises them on the day.

  6. Check recent local projects

    Ask for addresses or photographs of comparable jobs finished nearby in the last year or two.

  7. Avoid high-pressure sales

    A discount that expires today, or a knock on the door after a storm, is a reason to slow down rather than sign.

  8. Get everything in writing

    Change orders, timeline and payment schedule included, before the first payment changes hands.

Questions to ask before hiring

0 of 10 asked

Red flags

  • No verifiable local business address or registration
  • Pressure to sign on the first visit
  • A demand for full payment up front
  • An offer to cover or waive your insurance deductible
  • Refusal to put warranty terms in writing
  • A quote that will not itemize scope

Keep Going

Related home services in New York

FAQ

Waterproofing companies in New York FAQs

Do waterproofing contractors need a licence in New York City?

Yes for residential work. New York City requires a Home Improvement Contractor licence from the Department of Consumer and Worker Protection, and you can look any contractor up at nyc.gov before you sign. New York State has no separate waterproofing licence, so also ask for proof of liability insurance and workers' compensation.

How much does basement waterproofing cost in New York?

None of the companies here publishes a fixed price, because cost depends on the length of the wall, access and whether the work is inside or outside. Crack injection costs far less than a full interior drain or an exterior excavation. Get at least two written, itemized quotes and compare the warranty terms as well as the price.

Why does my Queens or Brooklyn basement flood after heavy rain?

Heavy rain can overwhelm combined sewers and saturate soil around older brick or stone foundations, so water comes in through cracks, failed mortar or the floor joint. It can also back up through a floor drain. A contractor should tell you which one you have, since a backwater valve and an interior drain solve different problems.

Editorial Record

About this ranking

Originally published
October 2026
Last reviewed
October 2026
Companies evaluated
4

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