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Corpus Christi, TX Accessory Structures: Garage Conversions (2026)

Light Restrictions

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

Garage conversion rules in Corpus Christi, TX, sometimes called garage-to-ADU or accessory living unit conversions, govern permits, ceiling height, egress, and parking replacement.

Key Facts

Eligible garages: Built before 1980, legally conforming
Floor area cap: None, unlike standard ADU limits
Upper story: Second-story ADU over garage allowed
Section: UDC Section 5.3.2.A.4.D
Other ADU rules: Coverage, yards, height, meter still apply

Summary

A garage built before 1980 in Corpus Christi can convert into an accessory dwelling unit with no floor-area cap, as long as the garage is a legally conforming structure. UDC Section 5.3.2.A.4.D also allows the conversion to add a second story above the garage for the ADU.

D. An existing garage built prior to 1980 may convert to one accessory dwelling unit with no maximum on floor area if the garage is a legally conforming structure. The conversion can include an upper story Accessory Dwelling Unit over the garage.

Source: Corpus Christi Building PermitsView official code

Full Breakdown

The Unified Development Code carves out a specific exception for older garages inside its general ADU floor-area limits. 4, ADU size is normally capped by zoning district, from 500 to 1,000 square feet of habitable space. Subsection D breaks from that cap: 'An existing garage built prior to 1980 may convert to one accessory dwelling unit with no maximum on floor area if the garage is a legally conforming structure,' and the conversion can add an upper story ADU above the garage. The exception only reaches a garage that already exists and predates 1980, and only if it is legally conforming, meaning it was lawfully built and still meets current zoning rules for a garage on that lot; a garage built after 1980, or one that is nonconforming, does not qualify. 3 still requires the owner to live in either the house or the converted unit.

Violations & Fines

Converting a garage that was built after 1980, or one that is not a legally conforming structure, and treating it as exempt from the ADU floor-area cap is a violation of the Unified Development Code. Development Services can refuse the building permit or certificate of occupancy under Section 10.1, and a conviction under Section 10.3 carries a fine up to $2,000 for a health, safety or welfare violation, up to $500 otherwise, each day a separate offense.

Frequently Asked Questions

Can I convert my old garage into an ADU without a size limit?

Yes, if the garage was built before 1980 and is a legally conforming structure. UDC Section 5.3.2.A.4.D removes the floor-area cap that applies to new-build ADUs for that specific conversion, and the change can include adding a second story above the garage.

What if my garage was built after 1980?

Then the exception does not apply, and your ADU falls under the standard floor-area caps in Section 5.3.2.A.4.A-C, which range from 500 to 1,000 square feet of habitable space depending on your zoning district and lot size.

Do I still need to meet setbacks and height limits for the converted garage?

Yes. Section 5.3.2.A.4.D only lifts the floor-area cap; the rest of Section 5.3.2.A still applies, so the converted unit must meet the principal structure's yard setbacks, cannot exceed the zoning district's height limit, and counts toward the lot's overall building coverage maximum.

Sources & Official References

[1]Corpus Christi Unified Development Code, Article 5, Section 5.3.2.A.4.D (Detached Accessory Dwelling Units)

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All Corpus Christi rules

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