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Water Damage Restoration in San Antonio, TX
Orographic lift along the Balcones Escarpment intensifies rainfall over San Antonio, and the county keeps 150 HALT high-water alert locations at flood-prone crossings. One call reaches vetted local water-damage pros, 24/7.
Active floods · San Antonio
No active flood events near San Antonio right now — see the live board.
Water damage in San Antonio is driven by flash flooding as much as by steady rain: the area averages 34.9 inches of precipitation a year, much of it arriving in short, intense bursts. Bexar County has drawn 3 federally declared flood disasters among 30 declarations overall, and the county describes itself as prone to flash flooding, operating 150 HALT high-water alert locations at flood-prone crossings.
Water-damage risk in San Antonio
19
flood, hurricane & storm disasters declared in Bexar County (FEMA)
2021
most recent flood/storm declaration: Severe Winter Storms (FEMA)
0.17"
rain forecast for San Antonio in the next 24 hours (NWS)
Sources: FEMA OpenFEMA — federally-declared disaster history (county FIPS 48029) · NOAA NCEI — 1991–2020 Climate Normals (SAN ANTONIO 8 NNE, TX US)
Why San Antonio homes flood
Bexar County sits on the Balcones Escarpment, the fault zone where the Edwards Plateau drops toward the Gulf Coastal Plain. Karst limestone, thin soils, and steep hills mean rain rushes into stream channels instead of soaking in, and the escarpment belt records some of the highest flood discharge per unit area of any drainage basin in the country. The 34.9 inches the county averages each year matter less than how quickly it arrives.
That runoff collects in creeks threaded through built-out neighborhoods — Olmos, San Pedro, Alazán, Salado, and Leon — before reaching the San Antonio River. The 1921 flood prompted Olmos Dam, built 1925–26, plus a downtown bypass channel finished in 1929; those works still govern where water goes. They were tested on October 17, 1998, when 11.26 inches fell in a single day, breaking a prior single-day record of 6.83 inches. Federally declared disasters in the county now total 30.
The county maps its high-risk land as FEMA zones A and AE, tied to the 1% annual-chance flood. Because creeks here crest within hours, water is often already inside a house before a forecast catches up — which puts the burden on fast extraction and drying, as outlined in this water damage restoration guide.
Flood repair permits & inspections
Water-damage repair inside the city limits generally runs on two tracks. The Development Services Department issues a Residential Repair Permit covering work such as sheetrock replacement, insulation replacement, and structural floor repairs, while patching holes and pulling carpet, tile, or laminate need no permit. Mechanical, electrical, and plumbing work each require separate permits, and any framing triggers a framing inspection followed by a final inspection. Where the structure sits in the mapped floodplain, a Floodplain Development Permit is also required, and the FEMA 50% rule caps improvement value against the structure's market value. Property outside city jurisdiction is permitted instead by Bexar County Public Works.
| Permit / inspection | When it applies |
|---|---|
| Residential Repair Permit | Issued by the Development Services Department for repair work including sheetrock replacement, insulation added or replaced, and structural floor repairs — the common scopes after water intrusion. The application states no permit is required for sheet rock repair (patching holes), or for carpet, tile, or wood/laminate flooring removal and replacement. If two or more exterior walls will be repaired, modified, or replaced, a plan review is required and this form cannot be used. The permit is valid for 6 months from the date of issuance. |
| Separate mechanical, electrical, and plumbing permits | The Residential Repair Permit application states that all mechanical, electrical, and plumbing work requires separate additional permits. A water-damage job that replaces wiring, outlets, a water heater, or supply and drain lines therefore needs its own trade permits alongside the repair permit. |
| Framing and final inspections | Under the Residential Repair Permit application, if framing is performed a framing inspection is required; an engineer's report may be required to satisfy that inspection, as determined by the inspector in the field. Once the above-mentioned inspections are complete, a final inspection is required. This applies when water reaches studs, joists, or subfloor and framing members are replaced rather than dried in place. |
| City of San Antonio Floodplain Development Permit (FPDP) | Required by the Public Works Department for work on property within the mapped floodplain, with 'Remodel to Existing Structure' listed as a proposed-improvement type. The Unified Development Code and FEMA 44 CFR 59.1 limit improvements to no more than 50 percent of the structure's market value before the improvements are made — the '50% rule' — applied over a 10-year period beginning on the date the first FPDP was approved. |
| Bexar County Floodplain Development Permit | This permit is issued by the county, not the city — Bexar County Public Works requires it when working on a property that has FEMA floodplain on it or that lies within 100 feet of the FEMA floodplain. Submittal includes an application signed by the owner or agent and a $50 review fee; work within the floodplain also requires construction plans, an elevation certificate or floodproofing certificate, and an itemized cost sheet for structure improvement. Review runs a 10-day completeness check, then a 30-day initial technical review with 15-day follow-up reviews. |
| Substantial improvement review (Bexar County) | A county-administered trigger: Bexar County Public Works states that if any portion of a structure is located within the FEMA floodplain, work will trigger a permit due to the potential for a 'substantial improvement' — when the cost of upgrades equals or exceeds 50 percent of market value for the structure. Where the work qualifies as a substantial improvement, the structure must meet existing requirements for elevation (residential) or floodproofing (commercial), so flood repair that crosses the threshold can require elevating the home rather than simply restoring it. |
Floodplain & drainage ordinances
- Unified Development Code Appendix F, § 35-F132 — Floodplain Development Permit (the "50% rule")
- Repair work on a habitable structure inside the mapped floodplain requires a floodplain development permit before construction begins. Improvements are capped at 50 percent of the structure's market value, measured over a rolling 10-year window that starts when the first such permit is approved. Applicants must file a contractor cost estimate covering both materials and labor, plus a Bexar County Appraisal District value or a certified third-party appraisal. Flood repairs that cross the threshold count as substantial improvement and force the structure to meet current floodplain standards.
- UDC § 35-F125(a)(2) and § 35-F142(a)(1) — Residential finished floor elevation
- Finished floor elevations for residential structures must be no less than one foot above the base flood elevation of the regulatory floodplain, defined as the ultimate development floodplain, and the lowest adjacent grade must sit at or above the base flood elevation. A flood-damaged home rebuilt as a substantial improvement has to reach that height. The floodplain administrator may require a pre-construction elevation certificate before permit approval and a post-construction certificate before the building is occupied again.
- UDC § 35-F124(C) — Easements for floodplains
- Drainage easements are delineated to contain the lesser of the FEMA 1-percent-annual-chance (100-year) flood zone, the 1-percent ultimate development condition water surface elevation, or the 4-percent (25-year) ultimate development floodplain plus freeboard. Construction, improvements, or structures within those drainage easements and the floodplain are prohibited without prior written approval from the floodplain administrator of the city or Bexar County. Rebuilding a damaged deck, shed, or addition can stall until that written approval is issued.
- UDC Appendix H (Storm Water Design Criteria Manual), Appendix A.1.III.A.7 and § 15.2 — Drainage easement encroachments and lot grading
- No structure, fence, wall, or other obstruction that impedes drainage may be placed within the limits of a platted drainage easement, and landscaping or modifications that alter the approved easement cross-sections need approval from the Director of TCI or the Director of Public Works. Both the city and the county retain ingress and egress rights to remove impeding obstructions. Separately, residential finished floors must be a minimum of eight inches above final adjacent grade, which constrains regrading after water intrusion.
- Bexar County Flood Damage Prevention Court Order (effective August 22, 2023), Article 4, Section C(1)(a)
- In unincorporated parts of the county, new construction and substantial improvement of a residential structure must have the lowest floor, including any basement, elevated at least one foot above the current effective or ultimate base flood elevation, whichever is greater, certified by a Texas-licensed engineer, architect, or land surveyor. Substantial improvement means repair costs at or above 50 percent of the appraisal district's building value; substantial damage triggers the same standard regardless of the repair work actually performed.
Local water-damage notes
- Community Rating System Class 6 — The city holds a Community Rating System Class 6 designation, effective October 1, 2022. The class earns National Flood Insurance Program policyholders a 20 percent premium discount on properties inside Special Flood Hazard Areas and a 10 percent discount on policies outside them. CRS standing reflects floodplain management activity that exceeds the NFIP minimum, and the discount applies automatically to qualifying policies rather than by application.
- Chronic low-water crossings (SAFD rescue data, 2015-2025) — Fire department records for 2015 through 2025 rank Seguin Road at Salado Creek as the most rescue-prone crossing in the area, with 46 high-water rescues. Old O'Connor Road north of Lookout Road follows at 31 rescues, then Hollyhock Road roughly 600 feet west of Babcock Road at 20, Pinn Road a quarter mile south of West Commerce at 14, and Spencer Lane east of Balcones Heights at 13. Gibbs Sprawl Road at Rosillo Creek and Sleepy Hollow at Sunburst each logged 10.
- San Antonio Water System EPA consent decree — The water utility entered a consent decree with the U.S. Environmental Protection Agency in June 2013 and committed to about $1.2 billion in sewer system work to reduce spills, with the cost carried in utility rates. The federal complaint centered on sanitary sewer overflows driven largely by capacity shortfalls, where heavy rainfall overwhelms collection lines. That rain-and-sewer coupling is why storm events in older parts of the system can surface as backups inside structures rather than as surface flooding alone.
- Bexar Regional Watershed Management — The county, the city and the San Antonio River Authority formed this virtual flood control district in October 1998 through an interlocal agreement, following floods in 1998 and 2002 that caused damages in excess of $1 billion. Twenty suburban cities have since joined the partnership, which coordinates flood control, stormwater and water-quality work across jurisdictional lines. The river authority also maintains the floodplain maps for the partner jurisdictions under interlocal agreement.
Cleanup & recovery services nearby
- City of San Antonio Household Hazardous Waste Drop-Off Center — Permanent municipal facility at 7030 Culebra Road — takes paint, household cleaners, pool chemicals, auto fluids, batteries and e-waste from residents who show a recent CPS Energy bill with the Environmental Fee plus photo ID, capped at 220 pounds per visit.
- Bulky Item Drop-Off Centers (Solid Waste Management Department) — Four municipal sites — Bitters (1800 Wurzbach Parkway), Culebra Road (7030 Culebra Road), Frio City Road (1531 Frio City Road) and Rigsby Avenue (2755 Rigsby Avenue) — accepting soaked carpeting, mattresses, furniture, water heaters and large appliances, with construction material limited to one cubic yard per visit against four cubic yards of bulky material.
- Bitters Brush Drop-Off Center — Residential brush site at 1800 Wurzbach Parkway taking downed branches, woody vines and shrubs at $0.25 for loads of 20 pounds or less and $0.235 per additional 20-pound increment, with city code requiring loads be tarped or a $5 penalty may apply.
- Tiger Sanitation — Family-owned hauler founded in 2002 renting 20-, 30- and 40-yard roll-off containers plus portable Storage Cubs across Bexar, Comal, Guadalupe, Kendall, Medina, Wilson and Atascosa counties.
- San Antonio Tree Surgeons — ISA-certified and oak-wilt-certified arborists (city license TL-924149) handling storm-downed and hazardous tree removal, trimming and stump grinding — no restoration or remediation work.
- AAA Alliance Self Storage — Third-generation family-owned facility at 6335 Camp Bullis Road offering month-to-month climate-controlled units with regulated temperature and humidity, plus drive-up and ground-floor access for contents moved out during repairs.
By the numbers
- Stream miles remapped countywide — A $14 million Map Modernization effort remapped more than 1,700 stream miles across the county using updated topography, land use, impervious cover and rainfall data, replacing decades-old flood maps.
- 1,700+
- High-water rescues, Old Seguin Road at Salado Creek — The San Antonio Fire Department logged 46 high-water rescue responses at this single Salado Creek crossing between 2015 and 2025, the most rescue-prone roadway on its ten-crossing list.
- 46
Looking for county-wide rules, permits and disaster history? Water Damage Restoration across Bexar County