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Corpus Christi, TX Accessory Structures: ADU Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

ADU rules in Corpus Christi, TX, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Units per lot: One detached ADU per lot
Max size, FR/RE/RS-22: 1,000 sq ft habitable space
Max size, RS-6/RS-4.5: 500 sq ft, 800 if lot >10,000 sf
Kitchen: Full kitchen allowed
Metering: No separate meter except irrigation
Effective date: Ordinance 032357, Feb. 23, 2021

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Texas under recent ADU streamlining laws. The Corpus Christi, TX rules below cover local size, height, and setback requirements.

Summary

Corpus Christi allows one detached accessory dwelling unit or garage apartment per lot in any residential zoning district, complete with a full kitchen. UDC Section 5.3.2.A caps the unit's floor area by district, from 500 square feet in RS-4.5 up to 1,000 square feet in FR, RE and RS-22, and folds it into the lot's overall building coverage and yard limits.

1. A detached accessory dwelling unit may be permitted in any residential zoning district. The unit may include a full kitchen. 2. Only one accessory dwelling unit shall be permitted per lot or parcel. 4. The total floor area of the accessory dwelling unit shall not exceed the lesser of either the total gross floor area of the principal residential dwelling unit, or as follows: A. 1000 maximum total square footage of habitable space for FR, RE, and RS-22 Zoning Districts B. 800 maximum total square footage for RS-15 and RS-10 Zoning Districts C. 500 maximum total square footage for RS-6 and RS-4.5 Zoning Districts, with the exception that lots over 10,000 square feet may allow for a maximum of 800 total square footage. 5. The principal residential and accessory dwelling unit together shall not exceed the maximum zoning district building coverage. 6. All principal structure yard requirements shall be met. 7. The accessory dwelling unit shall not exceed the maximum zoning district height. 8. Separate meters are prohibited except for irrigation purposes.

View official code

Full Breakdown

A, effective with Ordinance 032357 on February 23, 2021. A detached ADU, including a garage apartment, may be permitted by right in any residential zoning district and is allowed a full kitchen, not just a kitchenette. Only one ADU is allowed per lot or parcel; a second detached unit is not permitted even if the lot could otherwise support it. 5 lot larger than 10,000 square feet can go up to 800 square feet. The ADU and the main house together still cannot exceed the zoning district's maximum building coverage percentage, and the ADU has to meet every yard setback that applies to the principal structure, so it cannot sit closer to the property line than the house itself could.

Height is likewise capped at whatever the zoning district allows for a principal structure. The ADU cannot have its own separate water or electric meter; only an irrigation meter may be separately metered. A distinct owner-occupancy condition and a pre-1980 garage-conversion exception sit on top of these general standards within the same UDC section.

Violations & Fines

An ADU that exceeds its district's floor-area cap, adds a second detached unit, or is metered separately is a violation of the Unified Development Code. Development Services can refuse a certificate of occupancy or building permit for the noncompliant unit under Section 10.1, and under Section 10.3 a conviction carries a fine of up to $2,000 for a health, safety or welfare violation, or up to $500 otherwise, with each day of continued violation a separate offense.

Frequently Asked Questions

Can I add a detached ADU on my Corpus Christi lot?

Yes, in any residential zoning district under UDC Section 5.3.2.A, but only one detached accessory dwelling unit is allowed per lot or parcel, and it must meet the district's floor area cap, yard setbacks and height limit that apply to the main house.

How big can a Corpus Christi ADU be?

Corpus Christi ties ADU size to your zoning district: up to 1,000 square feet of habitable space in FR, RE and RS-22, 800 square feet in RS-15 and RS-10, and 500 square feet in RS-6 and RS-4.5 (800 if the lot exceeds 10,000 square feet), always capped at the size of the main house.

Can my ADU have its own kitchen and utilities?

The unit can include a full kitchen under Section 5.3.2.A.1, but it cannot have its own separate water or electric meter; Section 5.3.2.A.8 allows a separate meter only for irrigation, so utility service runs through the principal house's account.

Does my ADU count against my lot's building coverage?

Yes. Under Section 5.3.2.A.5 the principal house and the accessory dwelling unit are added together, and the combined footprint cannot exceed the maximum building coverage percentage set for your zoning district, so a larger ADU can limit how much house you can build.

Sources & Official References

[1]Corpus Christi Unified Development Code, Article 5, Section 5.3.2.A (Detached Accessory Dwelling Units)

Other rules in Corpus Christi

Shed & Carport RulesSome Restrictions Building Setbacks & Zoning: Setback RulesSome Restrictions Parking Rules: RV & Boat ParkingLight Restrictions ADU Owner OccupancySome Restrictions Garage ConversionsLight Restrictions Parking Rules: Driveway RulesSome Restrictions Fence Regulations: Material RestrictionsSome Restrictions Animal Ordinances: Veterinary Clinic ZoningSignificant Restrictions Fire Regulations: Propane StorageSome Restrictions

All Corpus Christi rules

How Corpus Christi compares: Easiest Cities to Build an ADU·Texas rules heatmap·Compare Corpus Christi to another location·View the Texas accessory structures overview

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