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Waterproofing · San Antonio, TXLast reviewed October 2026

4 Best Waterproofing Companies in San Antonio, TX (2026)

TenBestFind ranks 4 waterproofing contractors in San Antonio, TX, listed in Google's order among the companies that passed our checks. A company needed 4.5 stars or better, at least 50 Google reviews, an operational listing, a working website and a staffed San Antonio address. The list was last reviewed on October 21, 2026.

Four San Antonio companies passed our checks for waterproofing and foundation drainage work: Groundworks Foundation Repair San Antonio, Pinnacle Foundation Repair, Olshan Foundation Repair and G.L. Hunt Foundation Repair. All four hold 4.8 stars or better on Google with at least 600 reviews. San Antonio's expansive clay makes drainage and foundation work overlap, so every company here is a foundation firm with documented drainage services, and each listing says so.

4 companies reviewed4 rankedHow We Rank

The Ranking

Our top 4 waterproofing contractors in San Antonio

Most homes around San Antonio sit on expansive clay that swells when wet and shrinks in dry spells. That movement cracks slabs, and the water that drives it usually comes from poor grading, clogged gutters or a leaking line. For that reason the companies that handle drainage and waterproofing here are often foundation repair firms, and this list reflects that. Each company below was checked for its rating, review count, real local office and the drainage work it lists on its own site. Texas has no state waterproofing licence, so ask for proof of insurance, a written scope and a warranty in writing before you sign anything. Interior basements are rare in this part of Texas, so most of the work described here is exterior drains, French drains, sump discharge and crawl space sealing.

  1. 01

    Best for foundation repair paired with interior drains, sump pumps and crawl space sealing

    Groundworks Foundation Repair San Antonio

    4.8(957 Google reviews)
    Best forFoundation repair paired with interior drains, sump pumps and crawl space sealing
    In businessNot listed
    WarrantyWarranties stay with the installed solutions and the home and transfer to new owners; many cover wear and tear and manufacturing defects. No term in years is published.
    EmergencyNot listed

    Why we picked them

    4.8 from 943 Google reviews, a national foundation group with a named San Antonio general manager and interior drain, sump and crawl space services.

    What we like

    • 4.8 from 943 Google reviews, with crews and sales staff named in reviews
    • Interior drains, sump pumps, encapsulation and dehumidifiers alongside foundation repair
    • Transferable warranty, financing and free inspections

    Things to consider

    • Core trade is foundation repair, and the site lists no French drains or exterior grading.
    Key details
    Best for
    Foundation repair paired with interior drains, sump pumps and crawl space sealing
    Service area
    San Antonio
    Address
    18630 Goll St, San Antonio, TX
    Warranty
    Warranties stay with the installed solutions and the home and transfer to new owners; many cover wear and tear and manufacturing defects. No term in years is published.
    Financing
    Available
    Credentials
    Texas licensing page states compliance with applicable local licensing laws (no number listed)
  2. 02

    Best for a second opinion on foundation movement and exterior drainage

    Pinnacle Foundation Repair

    5.0(648 Google reviews)
    Best forHomeowners wanting a second opinion on foundation movement and drainage
    In businessNot listed
    WarrantyLifetime on steel piers and steel transition piers, 10 years on drilled piers, 5 years on drainage correction and mud jacking, per the company's service pages.
    EmergencyNot listed

    Why we picked them

    5.0 from 637 Google reviews, plus a real drainage correction service alongside its free-evaluation foundation work.

    What we like

    • One in three free evaluations ends with no repair recommended, per the company's own site
    • Dedicated drainage service covering surface drains, French drains and sump discharge
    • Lifetime warranty on steel piers, with crews and staff praised by name

    Things to consider

    • Core trade is foundation repair, with no interior basement or crawl space sealing.
    Key details
    Best for
    Homeowners wanting a second opinion on foundation movement and drainage
    Service area
    San Antonio
    Address
    6910 NE Interstate 410 Loop Ste 113
    Warranty
    Lifetime on steel piers and steel transition piers, 10 years on drilled piers, 5 years on drainage correction and mud jacking, per the company's service pages.
    Financing
    Available
    Credentials
    Full coverage insurance and workers compensation
  3. 03

    Best for homes where a settling slab and poor drainage go together

    Olshan Foundation Repair

    4.8(1195 Google reviews)
    Best forHomes where a settling slab and poor drainage go together
    In business93 years
    WarrantyLifetime warranty described as transferable, with three underpin tiers (partial exterior, full exterior, exterior and interior); full terms are not published on the site.
    EmergencyNot listed

    Why we picked them

    4.8 from 1,180 Google reviews, a 1933 foundation firm with documented drainage and basement waterproofing services.

    What we like

    • Founded in 1933 and holds U.S. Patent 8,500,368
    • Separate pages for drainage, basement waterproofing and crawl space work
    • Crews praised by name across 1,180 reviews

    Things to consider

    • One reviewer reported three unreturned calls to the accounts office about a payment.
    Key details
    Best for
    Homes where a settling slab and poor drainage go together
    Service area
    San Antonio
    Address
    1720 SE Loop 410 Acc Rd
    Years in business
    93 years
    Warranty
    Lifetime warranty described as transferable, with three underpin tiers (partial exterior, full exterior, exterior and interior); full terms are not published on the site.
    Financing
    Available
    Credentials
    BBB A+ rating
  4. 04

    Best for San Antonio homes with foundation movement and drainage problems

    G.L. Hunt Foundation Repair

    4.9(2428 Google reviews)
    Best forSan Antonio homes with foundation movement and drainage problems
    In business39 years
    WarrantyLimited lifetime transferable warranty on slab piers, 25 years on TexJack piers, 5 years on Sonotube piers and foam lifting, 1 year on drainage installations. All transferable to the next owner.
    EmergencyNot listed

    Why we picked them

    4.9 from 2,422 Google reviews, family-owned since 1987, with a limited lifetime transferable pier warranty and drainage services.

    What we like

    • Family-owned since 1987, led by Hayden Slack
    • French drains, sump pumps and crawl space encapsulation listed
    • Staff are praised by first name

    Things to consider

    • One reviewer reported calls routed to Dallas and a French drain job that ran longer than quoted.
    Key details
    Best for
    San Antonio homes with foundation movement and drainage problems
    Service area
    San Antonio
    Address
    4827 Whirlwind Dr
    Years in business
    39 years
    Warranty
    Limited lifetime transferable warranty on slab piers, 25 years on TexJack piers, 5 years on Sonotube piers and foam lifting, 1 year on drainage installations. All transferable to the next owner.
    Financing
    Available
    Credentials
    BBB Accredited Business

Side by Side

Compare the top waterproofing contractors in San Antonio

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
01Groundworks Foundation Repair San AntonioFoundation repair paired with interior drains, sump pumps and crawl space sealingSan Antonio4.8(957)Not listedView
02Pinnacle Foundation RepairHomeowners wanting a second opinion on foundation movement and drainageSan Antonio5.0(648)Not listedView
03Olshan Foundation RepairHomes where a settling slab and poor drainage go togetherSan Antonio4.8(1195)Not listedView
04G.L. Hunt Foundation RepairSan Antonio homes with foundation movement and drainage problemsSan Antonio4.9(2428)Not listedView

Coverage

Waterproofing companies serving San Antonio and nearby areas

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

  • San Antonio

Nearby rankings

Service coverage across San Antonio. Individual company areas are listed on each profile.

Methodology

How we chose the best waterproofing contractors in San Antonio

This list follows Google's order for waterproofing companies in San Antonio as read on October 21, 2026. A company needed 4.5 stars or better, at least 50 Google reviews, an operational listing, a working website and a staffed San Antonio address. Only four qualified, so the list is shorter than ten. Pure plumbers, restoration firms and sprinkler contractors were removed because waterproofing is not their main trade. Every company here is mainly a foundation repair firm, and each listing names the drainage services it actually offers.

Read our full ranking methodology
Evaluated4
Ranked4

Hiring

How to choose a waterproofing contractor in San Antonio

  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 San Antonio

FAQ

Waterproofing companies in San Antonio FAQs

Do waterproofing contractors in San Antonio need a state licence?

No. Texas does not issue a state waterproofing or general contractor licence. Plumbing and electrical work are licensed, so ask any company for proof of general liability insurance and workers compensation, and get the scope and warranty in writing.

How much does drainage or waterproofing work cost in San Antonio?

It depends on the scope, and none of these companies publish fixed prices. Get at least two written estimates. Exterior drain and French drain jobs generally cost far less than structural foundation repair, so ask each company to price drainage separately.

Why do San Antonio homes have water and foundation problems together?

Much of the city sits on expansive clay that swells when soaked and shrinks in drought. Water pooling near the slab from poor grading or clogged gutters drives that movement, so fixing drainage is often part of a foundation repair.

Editorial Record

About this ranking

Originally published
October 2026
Last reviewed
October 2026
Companies evaluated
4

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