Administrative overview · FIPS 48187
Guadalupe County permit authority
The first compliance decision is jurisdictional: identify the office with statutory authority over your parcel, then use its filing and inspection sequence to keep the project moving.
Jurisdictional status
County
This county profile is the primary starting point for unincorporated-area permitting.
Responsible agency
Guadalupe County Environmental Health Department / Fire Marshal Permitting Department
For a project in or near Guadalupe County, this office is the identified point of contact for permit intake, statutory code enforcement, plan review coordination, and inspection release conditions. Confirm the parcel’s boundary and project type before relying on the county lane.
Direct contact
Environmental Health: 830-303-8858; Fire Marshal Permitting: 830-303-8856 option 1; county operator: 830-303-4188
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Guadalupe County Development Center, Environmental Health Department, 310 IH-10 West, Seguin, TX 78155; Fire Marshal Office, 101 E. Court Street, Suite 208, Seguin, TX 78155
Operating hours
Environmental Health/floodplain staff: Monday-Friday approximately 7:30 a.m.-4:00 p.m.; confirm department availability before visiting.
Review expectation
The Environmental Health Department must approve or deny complete OSSF planning materials within 30 days of receipt. No general Fire Marshal plan-review turnaround was stated; the county’s fee schedule describes expedited third-party review for plans needing review within 10 business days.
Compliance workbench
Choose the next project decision.
Apply online
Open the verified digital gateway, application form, and review timeline.
Open guide →Fees & penalties
Understand fee schedules, enforcement exposure, and stop-work liabilities.
Open guide →Codes & exemptions
Read the code framework, minor-work exemptions, and inspection lane.
Open guide →Agency website
Visit the primary public source for current notices and contact changes.
Open guide →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.
Project questions
Frequently asked questions for Guadalupe County
Who handles permitting for this jurisdiction?
Guadalupe County Environmental Health Department / Fire Marshal Permitting Department 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 Environmental Health: 830-303-8858; Fire Marshal Permitting: 830-303-8856 option 1; county operator: 830-303-4188.
How long might review take?
The Environmental Health Department must approve or deny complete OSSF planning materials within 30 days of receipt. No general Fire Marshal plan-review turnaround was stated; the county’s fee schedule describes expedited third-party review for plans needing review within 10 business days.
How are inspections scheduled?
OSSF applicants submit the application, site/soil evaluation, scaled design and specifications, deed/appraisal/plat materials when applicable, driveway/address documentation for new systems, current designer/installer licenses, and maintenance affidavit/contract for aerobic systems. The county issues an Authorization to Construct, which expires after one year. Request OSSF inspections at least 24 hours in advance; conventional systems require staged inspections and advanced systems require operational and final inspections, with the licensed installer present. Fire Marshal applicants use City Works to submit permits/plans, check status, request inspections, and download certificates; inspection requests must include the permit number and work to be inspected.
Which codes and exemptions should I review?
For unincorporated-area fire and commercial/public building permitting, Guadalupe County adopted the 2024 International Fire Code with county amendments, effective under its 2026 permitting materials. OSSF permitting follows Texas Health and Safety Code Chapter 366, 30 TAC Chapter 285, applicable TCEQ licensing rules, and the Guadalupe County On-Site Sewage Facilities Order. Environmental Health also regulates floodplain development, subdivisions, and nuisance/code enforcement. Guadalupe County requires an OSSF permit for every OSSF regardless of lot size or acreage, so the ordinary state acreage exemption is not available through the county program. A property owner of a single-family dwelling may install or repair that property’s OSSF without being a licensed installer, but must meet all permitting, construction, and maintenance requirements and use a licensed site evaluator or professional engineer for the site evaluation. No broad cosmetic building exemption list was published.