County Building Permits
Castro County, TX - 2026 Building Permit Guide
How to apply for a building permit in unincorporated Castro County, Texas. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
Unincorporated Castro County only. Does not apply inside Dimmitt, Hart, or Nazareth city limits.
- Department
- County Judge's Office
- Address
- Castro County Courthouse, 100 E Bedford St., Dimmitt, TX 79027
- Phone
- 806-647-4451
- cugccj@castrocounty.org
Application Process
- Confirm the parcel is in unincorporated Castro County rather than inside Dimmitt, Hart, or Nazareth city limits.
- Contact Castro County directly to determine whether the project triggers any county-administered floodplain review or other county approval.
- If the project involves an on-site sewage facility or septic system, follow state OSSF permit rules. TCEQ permits are generally required through the local permitting authority or through TCEQ where no local authorized agent handles permitting.
- If the parcel lies in a regulated floodplain, confirm the county's current floodplain development permit path. Castro County appears in the March 8, 2022 FEMA community contact listing as an NFIP-participating county.
- Do not start work until the applicable county or state authority confirms whether a permit, septic approval, floodplain review, or inspection is required.
Source: County Judge's Office
General Requirements
No general county building-permit program with public documentation was identified. Verified controls are narrower: county floodplain participation under the NFIP and state-law OSSF/septic permitting rules that apply through the local permitting authority or TCEQ. No evidence was found that Castro County has adopted a county residential building code and inspection program under Texas Local Government Code Chapter 233, Subchapter F.
Required Documents
- For OSSF projects: TCEQ OSSF permit application and supporting septic-system materials required by the permitting authority
- Floodplain submittal requirements should be confirmed with the county
Work That Does NOT Require a Permit
Contact the County Judge's Office to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
Additional Resources
- County Judge Page
- County Contact Page
- Commissioners Court Page
- FEMA Community Contact Listing
- TCEQ OSSF Permit Information
- TCEQ OSSF Permit Application
- License lookup guide: Texas Contractor License Requirements
- Contract template: Texas Homeowner-Contractor Agreement
- Texas hub: Texas Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the County Judge's Office before applying.
Frequently Asked Questions
Castro County Building Permit FAQ
- Do I need a building permit in unincorporated Castro County, TX?
- No general county building-permit program with public documentation was identified. Verified controls are narrower: county floodplain participation under the NFIP and state-law OSSF/septic permitting rules that apply through the local permitting authority or TCEQ. No evidence was found that Castro County has adopted a county residential building code and inspection program under Texas Local Government Code Chapter 233, Subchapter F.
- How do I apply for a building permit in unincorporated Castro County, TX?
- 1. Confirm the parcel is in unincorporated Castro County rather than inside Dimmitt, Hart, or Nazareth city limits. 2. Contact Castro County directly to determine whether the project triggers any county-administered floodplain review or other county approval. 3. If the project involves an on-site sewage facility or septic system, follow state OSSF permit rules. TCEQ permits are generally required through the local permitting authority or through TCEQ where no local authorized agent handles permitting. 4. If the parcel lies in a regulated floodplain, confirm the county's current floodplain development permit path. Castro County appears in the March 8, 2022 FEMA community contact listing as an NFIP-participating county. 5. Do not start work until the applicable county or state authority confirms whether a permit, septic approval, floodplain review, or inspection is required.
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