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Drainage & Grading · San Antonio, TX

Drainage & Grading in San Antonio

2 contractors · ranked by rating & reviews · updated 2026

Poor drainage and improper grading around the foundation are the leading causes of recurring foundation movement in Texas. When water pools against the foundation, the clay soil swells; when it dries out, the clay contracts. Repeated cycles of this swell-and-shrink movement slowly destabilize even a well-built slab. Drainage correction typically includes re-grading soil around the perimeter so surface water flows away from the house, installing French drains or surface channel drains to capture and redirect runoff, and extending gutter downspouts well away from the foundation. Addressing drainage before or alongside foundation repair is critical — without it, a freshly repaired foundation is likely to experience the same movement again within a few years.

Below are 2 foundation contractors offering drainage & grading in San Antonio, TX, ranked by Google review volume so you can start with the most established options and contact them directly. The most-reviewed is G.L. Hunt Foundation Repair (4.9★, 2,350 Google reviews).

Typical pricing

Typical Texas range: $1,500–$8,000 for residential drainage correction and perimeter re-grading. Not a quote — scope varies greatly by lot conditions.

See our full guide to foundation repair contractors in San Antonio for local pricing and how to choose.

Top drainage & grading contractors in San Antonio

  1. 1
    G.L. Hunt Foundation Repair
    San Antonio

    G.L. Hunt Foundation Repair

    Foundation repair contractor

    Family owned since 1987, G.L. Hunt Foundation Repair helps San Antonio homeowners protect home value with expert foundation, crawl space, concrete, and drainage solutions.

    ★ 4.9 (2,350)Get quotes
  2. 2
    R
    San Antonio

    Ram Jack Texas - Central/South

    Foundation repair contractor

    Ram Jack Texas - Central/South provides reliable foundation repair solutions for homes and businesses across Texas.

    ★ 4.8 (454)Get quotes

FAQ

Drainage & Grading in San Antonio - common questions

How many contractors offer drainage & grading in San Antonio? +
Foundation Compass lists 2 contractors offering drainage & grading in San Antonio, TX.
Who has the best-rated drainage & grading in San Antonio? +
By Google review volume, G.L. Hunt Foundation Repair is the most-reviewed drainage & grading contractor in San Antonio (4.9★, 2,350 reviews). Rankings follow review count, not paid placement.
How much does drainage correction cost? +
Residential drainage projects in Texas generally run $1,500–$8,000 depending on scope: simple soil re-grading and downspout extensions are at the low end; full French-drain systems with catch basins and pop-up emitters are at the higher end. Get a written scope that identifies the source of the drainage problem before agreeing to any work.
Will fixing drainage also fix my foundation? +
Drainage correction prevents future movement but does not raise a foundation that has already settled. Most homeowners address both: foundation repair to correct existing settlement, then drainage correction to prevent recurrence. Doing repairs without fixing drainage often leads to the same problem returning.
How do I know if I have a drainage problem? +
Common signs include water stains or efflorescence on the foundation, soil that stays saturated after rain, visible gaps between the soil and the foundation perimeter, and foundation cracks that keep reopening after repair. A foundation inspector will typically note drainage issues as part of a written evaluation.

Drainage & Grading in other cities

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Other services in San Antonio

Slab Foundation RepairPier & Beam RepairHouse LevelingFoundation InspectionConcrete & Steel Piers