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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 Hays County.

In unincorporated Hays County, the Fire Marshal enforces the 2018 International Fire Code with Hays County local amendments; the 2018 International Building Code is adopted by reference through Chapter 1 of the IFC for commercial establishments, public buildings, and multifamily dwellings. Related referenced ICC/NFPA standards apply. New single-family houses and duplexes subject to the county's Notice of New Residential Construction require three third-party inspections (foundation, framing/mechanical before covering, and completion); the county does not perform those residential inspections. Floodplain/development work follows the Hays County Development Regulations, and OSSFs follow the county OSSF regulations and 30 TAC Chapter 285.

Inspection lane

Submit Development Services applications through MyGovernmentOnline, choosing Texas and Hays County. Submit Fire Marshal plans, permits, and every building/fire inspection request through https://www.hayscountypermits.com/; the 2026 building fee includes up to two site visits, normally rough-in and final/Certificate of Compliance. New single-family or duplex construction uses a qualified third party for the required foundation, framing/mechanical, and final inspections because Hays County does not conduct them. OSSF applicants must receive Authorization to Construct before installation and county Notice of Approval after inspection; call 512-393-2150 option 3 for OSSF questions.

Minor-work playbook

Understand what may be exempt—and what is not.

Interior renovation of a single-family house outside the floodplain does not require a development permit; interior work inside the floodplain may require one. Solar panels attached directly to an existing structure do not require a development permit, but a new supporting structure does. Modification of an existing cell tower does not require a development permit unless it adds construction, a slab, foundation, generator, or support building. The county fire/building code does not apply to single-family dwellings, duplexes, triplexes, or purely agricultural buildings with no workers or public access. No Fire Marshal temporary-structure permit is required for tents or membrane structures under 400 square feet or for structures not open to the public. All OSSF installations require a county permit regardless of acreage.

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 Development Services applications through MyGovernmentOnline, choosing Texas and Hays County. Submit Fire Marshal plans, permits, and every building/fire inspection request through https://www.hayscountypermits.com/; the 2026 building fee includes up to two site visits, normally rough-in and final/Certificate of Compliance. New single-family or duplex construction uses a qualified third party for the required foundation, framing/mechanical, and final inspections because Hays County does not conduct them. OSSF applicants must receive Authorization to Construct before installation and county Notice of Approval after inspection; call 512-393-2150 option 3 for OSSF questions.

  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 ↗Fee scheduleOpen official source ↗Planning or zoning referenceOpen official source ↗Contractor license lookupOpen official source ↗

Project questions

Frequently asked questions for Hays County

Who handles permitting for this jurisdiction?

Hays County Development Services / Hays County Fire Marshal's 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?

Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact Development Services: 512-393-2150; Fire Marshal: 512-393-7300.

How long might review take?

Initial Development Services administrative review may take several business days; a complete overall review time is not published. Fire Marshal projects needing review within 10 business days, projects of at least 10,000 combined square feet, high-hazard occupancies, hazardous-material/aerosol storage, or rack/high-piled storage require approved outside third-party plan review plus county fees.

How are inspections scheduled?

Submit Development Services applications through MyGovernmentOnline, choosing Texas and Hays County. Submit Fire Marshal plans, permits, and every building/fire inspection request through https://www.hayscountypermits.com/; the 2026 building fee includes up to two site visits, normally rough-in and final/Certificate of Compliance. New single-family or duplex construction uses a qualified third party for the required foundation, framing/mechanical, and final inspections because Hays County does not conduct them. OSSF applicants must receive Authorization to Construct before installation and county Notice of Approval after inspection; call 512-393-2150 option 3 for OSSF questions.

Which codes and exemptions should I review?

In unincorporated Hays County, the Fire Marshal enforces the 2018 International Fire Code with Hays County local amendments; the 2018 International Building Code is adopted by reference through Chapter 1 of the IFC for commercial establishments, public buildings, and multifamily dwellings. Related referenced ICC/NFPA standards apply. New single-family houses and duplexes subject to the county's Notice of New Residential Construction require three third-party inspections (foundation, framing/mechanical before covering, and completion); the county does not perform those residential inspections. Floodplain/development work follows the Hays County Development Regulations, and OSSFs follow the county OSSF regulations and 30 TAC Chapter 285. Interior renovation of a single-family house outside the floodplain does not require a development permit; interior work inside the floodplain may require one. Solar panels attached directly to an existing structure do not require a development permit, but a new supporting structure does. Modification of an existing cell tower does not require a development permit unless it adds construction, a slab, foundation, generator, or support building. The county fire/building code does not apply to single-family dwellings, duplexes, triplexes, or purely agricultural buildings with no workers or public access. No Fire Marshal temporary-structure permit is required for tents or membrane structures under 400 square feet or for structures not open to the public. All OSSF installations require a county permit regardless of acreage.

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.