Corpus Christi | Flood, Coast and Military Zones

Corpus Christi Flood, Coastal and Military Zone Rules for New Homes

Corpus Christi's code covers bay and Gulf shoreline, Padre and Mustang Islands, and land near three Navy airfields. Four sets of rules follow from that. The City's flood code, Article V of Chapter 14, sets how high a new home must sit. Windstorm rules from the Texas Department of Insurance (TDI) set how strongly it must be built. Beach and dune permits govern building near the Gulf. And the Military Compatibility Area Overlay limits homes near the runways. This page gives the numbers for each. The Corpus Christi overview gives the short version.

The Flood Code and Its Maps

Article V of Chapter 14, the Flood Hazard Prevention Code, "applies to all areas of special flood hazard within the jurisdiction of the city" (Section 14-531). An area of special flood hazard is land "subject to a one (1) per cent or greater chance of flooding in any given year." The base flood is that 1 percent flood, and the base flood elevation is the height its water is calculated to reach.

Section 14-532 adopts the FEMA study and maps that draw those areas: "The Flood Insurance Study (FIS) for Nueces County, Texas, and Incorporated Areas, dated October 13, 2022, with accompanying flood insurance rate maps (FIRM) dated October 13, 2022 and any revisions thereto." Section 14-533 requires "a development permit in the floodplain." Section 3.18 of the UDC has the floodplain administrator review each building permit application for the site.

The code disagrees with itself on one point. The building code amendment in Section 14-231 rewrites section 1612.3 to adopt the Flood Insurance Study for the City of Corpus Christi, Texas, dated July 23, 1971, "as revised on September 17, 1992," and its revisions. The residential code in Section 14-291 deletes its own flood section, R322, and points to Article V. For a house or duplex, Article V and its 2022 maps apply; for a building under the commercial code, ask the floodplain administrator which study it uses.

How High to Build

Section 14-552(1) is the main rule: "New construction of any residential structure must have the lowest floor (including basement) and machinery or equipment, elevated to one (1) foot above the base flood elevation." Substantial damage and substantial improvement must meet the same height. A substantial improvement is work costing 50 percent or more of the market value of the structure before the work starts, and substantial damage is damage that would cost that much to repair. An engineer, architect or land surveyor must certify the height to the floodplain administrator.

The City's development requirements page gives an example: a base flood elevation of 8 feet "would make the development requirement at or above 9'." Section 14-551(8) says a lowest floor "one (1) foot higher or more above the base flood elevation" is "specifically recommended," because it "may provide for significant reductions in insurance premiums."

Source: Corpus Christi Code of Ordinances, Sections 14-552, 14-554 and 14-556, Supplement 44; City of Corpus Christi, Development Requirements page.

V Zones: Homes on Pilings

V zones are coastal high hazard areas, land "subject to possible high-energy wave action" from storm surge and hurricane waves (Section 14-556). A lot in a V zone carries the strictest rules in the flood code:

• "All new construction must be located landward of the reach of mean high tide."
• New homes stand "on pilings and columns" with the bottom of the lowest horizontal structural member of the lowest floor "elevated to one (1) foot above the base flood elevation."
• An engineer or architect must certify the design. The City's page asks for a V Zone Design Certificate "before permit issuance."
• The space below stays open or has breakaway walls, designed to collapse under wind and water loads at a safe loading resistance of 10 to 20 pounds per square foot.
• Enclosed space below "may not be used for human habitation," and an enclosure taller than 5 feet needs a non-conversion agreement filed with the deed.
• "The use of fill for structural support of buildings is prohibited," and so is altering sand dunes or mangroves in a way that would increase flood damage.

One area has an exception. Inside the North Beach Development Plan, Section 14-556(b)(15) allows "minor grading and the placement of minor quantities of nonstructural fill" in zone V for landscaping, drainage and slabs, provided it does not block floodwater from passing under the building.

A Chapter 14 flood violation is a misdemeanor with a fine of "not more than five hundred dollars ($500.00) for each violation" (Section 14-557). Variances go to the construction trade advisory and appeals board (Section 14-544). The FY 2026 fee schedule lists floodplain review and inspection for a home at $100, a floodplain determination at $150, and a floodplain hardship variance application at $300 plus the board's fee.

Windstorm Design and Certificates

Insurance Code 2210.003 lists Nueces County among the 14 "first tier coastal" counties. TDI's windstorm inspection page says that to buy a policy from the Texas Windstorm Insurance Association (TWIA), which sells wind and hail coverage to coastal owners who cannot get it privately, "most homes and properties must have a certificate of compliance." TDI issues a WPI-8 for construction inspected while underway and a WPI-8-E for completed construction.

The City ties its permits to that process without replacing it. The building code amendment in Section 14-231 says "framing inspections do not include or take the place of inspections or certifications for compliance required under Texas Department of Insurance windstorm requirements." The City's new residential buildings page lists, for a new home, a "completed Texas Department of Insurance WPI-1 Form" and windstorm drawings sealed by a Texas professional engineer showing hold-downs, uplift connections, shear walls and anchor bolts, and an elevation certificate when the lot is in a floodplain.

The design wind speed changed in 2026. The City's Informational Bulletin 021 says that "effective April 1, 2026, TDI will adopt the 2024 ICC codes, including changes to wind speed design criteria," and that submittals on or after that date "must be designed to comply with the TDI-adopted wind speed design criteria." It lists 150 mph for houses under the 2024 International Residential Code, and 140, 150, 160 and 170 mph for risk categories I to IV under the 2024 International Building Code.

Beach and Dune Permits

The City's area development plans include Padre Island and Mustang Island (UDC Section 8.3.6), and two UDC permits apply to building near the Gulf beach. Section 3.14 requires a beachfront construction certificate for a site "located seaward of the beachfront construction line." Staff may approve it if the work is not seaward of the erosion area line, is not on a beach access, does not support structures on the public beach, and adds no retaining wall or impervious surface "within 200 feet landward of the vegetation" line. Otherwise the Beach/Dune Committee decides at a public meeting.

Section 3.13 requires a dune protection permit "if the site is located seaward of the dune protection line in any area of the City located within Kleberg County," and says "no person may damage, destroy or remove a sand dune or a portion of sand dune seaward of the dune protection line." A pre-application conference is required. Plats must show critical dune areas and the boundary of submerged state land (Section 3.1.6), and the lot area excludes land seaward of the state-owned water boundary (Section 4.2.2).

The FY 2026 fee schedule lists a Kleberg County dune protection permit at $1,060, Nueces County permits at $350 for small-scale and $750 for large-scale or master planned projects, and an erosion response permit at $500, plus the public notice surcharge where it applies.

The Island Overlay on Padre Island

Section 6.4 sets the -IO Island Overlay "to create a distinctive quality of life of the area by promoting building design characteristic of a resort area." It applies "only to a project commenced after August 17, 2004," keeps the base district's uses and standards, and requires "a minimum street yard setback of 10 feet" for townhouses and multifamily buildings. An architectural overlay along Park Road 22 and SH 361 applies to "all multifamily and nonresidential structures," with design guidelines for Spanish, Mediterranean or coastal styles; its guidelines say vinyl siding "should not be used for new construction" on lots facing Park Road 22 or in the Lake Padre area.

Navy Airfield Zones

Section 6.5 creates the Military Compatibility Area Overlay Districts because "the areas below departure and approach paths are exposed to measurable risk of aircraft accidents and influence of increased noise." It names imaginary height surfaces for NOLF Waldron, NOLF Cabaniss and Truax Field at Naval Air Station Corpus Christi. The overlay is shown on the zoning map as a suffix, such as "CG-2/APZ-2," and "authorized uses must be permitted in both the base zoning district and the overlay district."

Source: Corpus Christi UDC, Section 6.5.2 and Table 6.5.3. DNL is the day-night average sound level in decibels.

Section 6.5.3.D says "residential uses are prohibited, except as provided for in exceptions for residential uses in this section." The exceptions let an existing home be repaired and enlarged without adding units, let a vacant platted residential lot hold one single-family home, and let unplatted residential land be platted for houses at no more than one per acre. The code does not agree with itself here: Table 6.5.3 allows detached houses in APZ-2 at "a maximum density of 2 Du/Acre," while the exceptions cap new lots at one house per acre. Ask the City which number it applies.

Final plats in APZ-1 and APZ-2 must carry a notice that the land "is subject to noise and/or aircraft accident potential." For a rezoning in the overlay, the director should ask the Navy for data at least 30 days before the Planning Commission hearing. State law adds its own limits: SB 15 does not reach land within 3,000 feet of an airport or military base, or within 15,000 feet of a base with an overlay of clear and accident potential zones (Local Government Code 211.052), and SB 840 does not reach land within 3,000 feet of an airport or military base or in a clear zone or accident potential zone (Section 218.101).

Where to Go Next

Related on VanPlex: the Corpus Christi overview, insurance and flood in Texas and building codes from duplex to fourplex.

Frequently Asked Questions

Official sources (checked October 2026)