Fees, valuation & enforcement
Permit fees are a project input. Enforcement exposure is a project risk. Use the official schedule where available, then confirm valuation, trade permits, plan review, and inspection charges with the Authority Having Jurisdiction.
Official fee pathway
The final charge may depend on declared construction value, occupancy classification, square footage, plan review, state surcharges, trade permits, technology fees, and inspection activity. Do not use a neighboring city’s fee table as a substitute for this jurisdiction.
Fee desk contact
Development Services: 512-393-2150; Fire Marshal: 512-393-7300
Ask the counter to confirm current charges before submitting a project with multiple trades or a change of use.
Financial exposure
Plan for building, mechanical, plumbing, electrical, fire, energy, zoning, septic, right-of-way, or other reviews that the project scope triggers. The lowest initial permit fee is not always the lowest project cost.
Enforcement exposure
When work begins without authorization, the agency may halt the site, require corrective plans, impose additional fees, withhold inspection release, or require concealed work to be exposed for review.
Closeout exposure
A missing final inspection or certificate can complicate occupancy, refinancing, sale, insurance, and utility connection. Preserve the approved plans and signed inspection record through closeout.
Professional field note
Even when a cosmetic or minor project does not require a building permit, zoning, floodplain, shoreline, historic, utility, fire, or right-of-way controls may still apply. Confirm the full jurisdictional picture before work starts.
Source trail
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.
Project questions
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.
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.
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.
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.
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.
Why permit costs vary
Building departments commonly calculate charges from valuation, occupancy, floor area, project type, plan review effort, trade scope, state surcharges, and inspection activity. A remodel that appears small on paper may still trigger structural, energy, fire, or utility review. Ask the permit counter which disciplines apply before you finalize the construction budget.
The same discipline applies to enforcement. Correcting unpermitted work after finishes are installed can require demolition, revised plans, additional inspections, and schedule disruption. Authorization is usually the less expensive project-management decision.