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Codes, exemptions & field inspections

Build to the adopted code. Verify every exception.

This guide translates the available agency record into a preconstruction checklist for structural scope, minor work, and inspection release. The adopted code and the issuing official control when a field condition is disputed.

Regulatory framework

The code baseline for Wilson County.

Wilson County requires permits for development, driveways, and septic work. Floodplain development is administered under the Wilson County Flood Damage Prevention Order using the November 26, 2010 FIS/FIRM and later revisions. The current Wilson County Subdivision and Development Rules and Regulations were adopted April 13, 2026 and incorporate the 2021 International Fire Code for subdivision water supply, fire flow, and emergency access. OSSFs are governed by the Wilson County local order, Texas Health and Safety Code Chapter 366, and 30 TAC Chapter 285; professional OSSF design is required. The county does not publish a conventional residential structural-building permit or countywide IRC/IBC trade-code program; its published packet covers floodplain/development, OSSF, and driveway approvals.

Inspection lane

Submit the complete paper packet with the recorded deed, legal plat, scaled site drawing, verified 911 address, and required design documents to the Permitting and Development Office; incomplete applications are not accepted. Call 830-393-8357 to coordinate development, septic, and driveway inspections. Do not begin OSSF work before Authorization to Construct, and do not occupy or operate the system until it passes final inspection and the county issues a License to Operate. Authorization is valid for 12 months; if final inspection is not completed within one year, a new application and fee are required. A concrete county-road driveway requires a pre-pour inspection. Projects in a special-flood-hazard area require the applicable elevation certificate, and development with a footprint of three acres or more requires a drainage study.

Minor-work playbook

Understand what may be exempt—and what is not.

The county publishes no cosmetic- or minor-work exemption list and states that permits are required for any development, driveway, or septic work. A property outside the special-flood-hazard area may receive a floodplain exemption certificate only after the county reviews the development application and makes that determination; the application and $100 determination fee still apply. Subdivision plat exemptions exist for certain divisions qualifying under Texas Local Government Code Section 232.0015, including specified agricultural and qualifying family divisions, but those exemptions do not waive separate floodplain, driveway, or OSSF requirements.

Field rule

A permit exemption generally addresses one narrow construction trigger. It does not automatically waive zoning, land-use, floodplain, shoreline, fire, energy, electrical, utility, septic, or right-of-way requirements. Obtain written confirmation when the project involves a new structure, structural alteration, change in occupancy, or concealed work.

Inspection pipeline

Keep the work visible at every release point.

  1. 1

    Request with lead time

    Submit the complete paper packet with the recorded deed, legal plat, scaled site drawing, verified 911 address, and required design documents to the Permitting and Development Office; incomplete applications are not accepted. Call 830-393-8357 to coordinate development, septic, and driveway inspections. Do not begin OSSF work before Authorization to Construct, and do not occupy or operate the system until it passes final inspection and the county issues a License to Operate. Authorization is valid for 12 months; if final inspection is not completed within one year, a new application and fee are required. A concrete county-road driveway requires a pre-pour inspection. Projects in a special-flood-hazard area require the applicable elevation certificate, and development with a footprint of three acres or more requires a drainage study.

  2. 2

    Preserve access

    Do not cover framing, reinforcement, wiring, piping, damp-proofing, or life-safety work until the required inspection has been completed and documented.

  3. 3

    Close the record

    Retain the approved plans, inspection approvals, correction responses, and final certificate or occupancy release with the property file.

Contractor verification

Verify the builder before the contract is signed.

Use the state licensing system to verify active registration, trade credentials, bond status, and liability coverage where available. Match the legal business name to the proposal and permit application.

Verify contractor ↗

Planning reference

Keep the parcel rules beside the building plans.

A building permit is only one part of statutory compliance. Check the local zoning, ordinance, map, or land-use reference before finalizing setbacks, height, lot coverage, access, drainage, or accessory structure placement.

Open planning reference ↗

Source trail

Official sources for this profile

Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.

Agency websiteOpen official source ↗Application instructionsOpen official source ↗Fee scheduleOpen official source ↗Planning or zoning referenceOpen official source ↗Contractor license lookupOpen official source ↗

Project questions

Frequently asked questions for Wilson County

Who handles permitting for this jurisdiction?

Wilson County Permitting and Development Office is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.

How should I begin an application?

No verified online portal was located in the reviewed public materials. Contact Permitting and Development Director Luz Serrato: 830-393-8357; the current department page directs development, septic/food, and driveway inspection calls to 830-393-8357; fax 830-393-8379 and request the current application route before preparing a final submittal.

How long might review take?

No fixed development, floodplain, OSSF inspection, or driveway-review time is published. The April 13, 2026 subdivision rules require Commissioners Court to approve, conditionally approve, or disapprove a complete plat application within 30 days after receipt and Development Officer sign-off; a qualifying written extension may add no more than 30 days. Under state OSSF rules, a complete septic application must be approved or denied within 30 days. OSSF Authorization to Construct and floodplain permit work are each subject to a one-year completion period unless the applicable extension or new application is obtained.

How are inspections scheduled?

Submit the complete paper packet with the recorded deed, legal plat, scaled site drawing, verified 911 address, and required design documents to the Permitting and Development Office; incomplete applications are not accepted. Call 830-393-8357 to coordinate development, septic, and driveway inspections. Do not begin OSSF work before Authorization to Construct, and do not occupy or operate the system until it passes final inspection and the county issues a License to Operate. Authorization is valid for 12 months; if final inspection is not completed within one year, a new application and fee are required. A concrete county-road driveway requires a pre-pour inspection. Projects in a special-flood-hazard area require the applicable elevation certificate, and development with a footprint of three acres or more requires a drainage study.

Which codes and exemptions should I review?

Wilson County requires permits for development, driveways, and septic work. Floodplain development is administered under the Wilson County Flood Damage Prevention Order using the November 26, 2010 FIS/FIRM and later revisions. The current Wilson County Subdivision and Development Rules and Regulations were adopted April 13, 2026 and incorporate the 2021 International Fire Code for subdivision water supply, fire flow, and emergency access. OSSFs are governed by the Wilson County local order, Texas Health and Safety Code Chapter 366, and 30 TAC Chapter 285; professional OSSF design is required. The county does not publish a conventional residential structural-building permit or countywide IRC/IBC trade-code program; its published packet covers floodplain/development, OSSF, and driveway approvals. The county publishes no cosmetic- or minor-work exemption list and states that permits are required for any development, driveway, or septic work. A property outside the special-flood-hazard area may receive a floodplain exemption certificate only after the county reviews the development application and makes that determination; the application and $100 determination fee still apply. Subdivision plat exemptions exist for certain divisions qualifying under Texas Local Government Code Section 232.0015, including specified agricultural and qualifying family divisions, but those exemptions do not waive separate floodplain, driveway, or OSSF requirements.

Field sequencing matters

The inspector needs to see the work at the right moment.

Code compliance is not only a plan-review exercise. Footings, reinforcement, framing, fireblocking, wiring, piping, insulation, weather protection, and life-safety systems each have points where the work must remain accessible. Build the inspection calendar into the trade schedule instead of treating it as a final administrative step.

When a project qualifies for a narrow minor-work exemption, keep a written explanation of why it qualifies and confirm that related zoning, utility, fire, energy, or environmental rules do not create a separate approval requirement.

Closeout file

Keep the approved plan set, inspection approvals, correction responses, contractor license verification, final certificate, and any occupancy release together. A clean record protects the owner, builder, lender, insurer, and future buyer.