Corpus Christi, TX Accessory Structures: ADU Impact Fees (2026)

Corpus Christi does not offer ADU-specific impact fee waivers. Standard development fees apply: building permit fees based on construction valuation through Development Services (typically $500–$1,200 for small ADUs), plan-check fees, and separate trade permit fees (electrical, plumbing, mechanical). Corpus Christi Water Utilities charges Water and Wastewater Impact Fees under the Citywide Impact Fee Ordinance authorized by Texas Local Government Code Chapter 395. Charges are set by service area and typically run $2,000–$4,000 for water and $2,000–$3,500 for wastewater per single-family living-unit equivalent for a new tap. ADUs sharing the principal dwelling's existing tap typically pay no additional impact fee but may pay a small secondary-meter or sub-meter charge if requested. Roadway impact fees under the city's roadway impact fee program may apply for net new dwelling units in some service areas. Electric service is provided by AEP Texas; gas where available is provided by CenterPoint Energy or Texas Gas Service; both charge their own extension fees separately. Texas has no statewide ADU impact-fee waiver analogous to California Gov. Code § 65852.2(f). Nueces County does not separately charge ADU impact fees inside city limits. Properties in the Padre Island and Flour Bluff areas may face additional water and wastewater infrastructure surcharges due to outlying service requirements.