Medina County does not issue general building permits. Like most Texas counties it has no adopted residential building code and no building inspection program for unincorporated areas. What applies are the environmental and land records that govern rural construction: on-site sewage facility permitting, floodplain development, subdivision platting, addressing, and county road access.
The overlay that distinguishes this county is water. Parts of Medina sit over the Edwards Aquifer recharge and contributing zones, where water quality protection requirements administered by the Edwards Aquifer Authority and TCEQ run alongside county permitting and can add substantial time to a project with meaningful ground disturbance.
Medina also sits directly west of San Antonio, and growth pressure along the US 90 and IH-35 corridors has reached it. City limits and extraterritorial jurisdictions around Castroville, Devine, and Lytle have expanded, and a municipal ETJ can reach unincorporated land.
Covers unincorporated Medina County. Hondo, Castroville, Devine, Lytle, Natalia, and La Coste permit their own territory — confirm whether the parcel is inside a city limit or an ETJ before assuming county rules apply.
Check the aquifer before you check anything else. Where a parcel sits over the Edwards Aquifer recharge or contributing zone, water quality protection requirements attach through the Edwards Aquifer Authority and TCEQ — a separate approval track from anything the county administers, and one that can add months on a site with significant disturbance.
What requires a county permit in Medina County?
The question in unincorporated Medina County is not which building permit you need. It is which environmental and land records your project triggers, whether the Edwards Aquifer overlay reaches the parcel, and whether it is genuinely outside every city limit and ETJ.
On-site sewage carries the clearest statewide requirement. Texas requires a permit for any OSSF under Texas Health and Safety Code Chapter 366 and TCEQ rules at 30 TAC 285, administered locally by an authorized agent — and over the recharge zone, 30 TAC 285.40 imposes special requirements on OSSFs.
Still required
- On-site sewage facility permit — required statewide
- Licensed site evaluation as part of the OSSF application
- Special OSSF requirements where the parcel sits over the Edwards Aquifer recharge zone
- Edwards Aquifer protection plan where applicable — a separate agency track
- Floodplain development where the parcel touches a mapped hazard area
- Subdivision plat when land is divided
- 911 address assignment for new structures
- Driveway or culvert access onto a county road
Not required by the county
- County building permit — not issued
- County building code compliance — none adopted
- County construction inspections across the trades
- County certificate of occupancy
Medina County building department: who handles permitting
Medina County administers on-site sewage permitting through environmental health as the local authorized agent, with floodplain administration, subdivision platting, and road access handled through county offices and Commissioners Court at Hondo.
Groundwater sits outside county authority. The Medina County Groundwater Conservation District permits and regulates water wells independently, which matters on a rural parcel where domestic or irrigation supply is part of the plan.
| Detail | Information |
|---|---|
| Building permits | Not issued — no county building code for unincorporated areas |
| OSSF / septic | Medina County environmental health, as local authorized agent |
| Governing rules | Tex. Health & Safety Code ch. 366 and TCEQ rules at 30 TAC 285 |
| Edwards Aquifer | Recharge zone OSSF requirements under 30 TAC 285.40; protection plans via EAA and TCEQ |
| Water wells | Medina County Groundwater Conservation District |
| Floodplain, plats, roads | Medina County offices and Commissioners Court, Hondo |
| County seat | Hondo |
| Inside city limits | Hondo, Castroville, Devine, Lytle, Natalia, La Coste |
Establish the aquifer position and the septic feasibility together. On recharge-zone land the two interact directly — 30 TAC 285.40 imposes special OSSF requirements there, and the system design has to satisfy both the county and the aquifer rules.
Medina County permits: record types and what each covers
The permit-type question works differently in a Texas county. Medina County has no adopted building code for unincorporated areas and issues no residential building permits, so there is no record-type matrix of the kind Hondo or Castroville maintains. What exists is a set of environmental and land records — and over the Edwards Aquifer, a separate agency track that can outrank all of them on schedule.
What Medina County actually issues
| Record | What triggers it | Who administers it | Notes |
|---|---|---|---|
| OSSF permit to construct | Installing, altering, repairing, or extending an on-site sewage facility where no public sewer is available | Medina County Environmental Health | Required statewide; soil evaluation by a licensed site evaluator is part of the application |
| OSSF license to operate | Issued after the permit to construct requirements are met and the system passes inspection | Medina County Environmental Health | Also triggered on transfer of ownership of an existing system |
| Floodplain development permit | Placing fill, setting a structure, or developing in or near a mapped special flood hazard area | County floodplain administrator | Substantial improvement and substantial damage rules attach to existing structures |
| Subdivision plat | Dividing land in the unincorporated county | Commissioners Court and county engineering | Road, drainage, and access standards apply |
| 911 address assignment | New structures and new access points needing an address | County addressing / emergency management | Usually a prerequisite for utility service |
| Right-of-way and driveway culvert | New or modified access onto a county road | County road and bridge / precinct | Culvert sizing set by drainage conditions |
| Water well registration | Drilling a water well | Medina County Groundwater Conservation District | Groundwater districts operate independently of the county |
| Ch. 233 commercial / multifamily | New commercial, public-accessible, or multifamily buildings, and substantial improvements, where the county has adopted the authority | Commissioners Court | Scope is set by county order; confirm adoption before assuming it applies |
County reaches this
- On-site sewage facilities, everywhere in the state
- Floodplain development and substantial improvement
- Subdivision of land and county road access
- Addressing, and fire code where separately adopted
County generally does not
- Issue residential building permits in unincorporated areas
- Conduct residential construction inspections
- Issue a residential certificate of occupancy
- Enforce a residential building code absent a county order adopting one
Solar permits in Medina County
In unincorporated Medina County there is generally no county building permit for a residential rooftop or ground-mount photovoltaic system, because the county does not regulate residential construction. That is a jurisdictional fact rather than a green light: the electrical work still has to be performed by a TDLR-licensed electrician to code, and the utility still governs interconnection.
Utility interconnection is the real gate. The interconnecting utility — the wires company in deregulated territory, or the electric cooperative serving the parcel in much of rural East Texas — runs its own application, engineering review, and Permission to Operate process, and it is not waived by the absence of a county permit.
Under Tex. Prop. Code §202.010 a property owners' association cannot prohibit a solar energy device outright, and any dedicatory provision that does is void — but the statute preserves the association's right to require prior architectural approval and to impose placement and appearance conditions. Approval cannot be unreasonably withheld.
Inside Hondo city limits the picture changes completely: the city permits solar like any other municipality. The jurisdiction question is the first question.
Roofing permits in Medina County
A residential roof covering replacement in unincorporated Medina County generally does not require a county permit, for the same reason: Texas counties have no general authority over residential construction outside city limits.
Two things still apply. If the structure sits in a mapped special flood hazard area, the county floodplain ordinance can reach the work through substantial improvement rules — and cumulative improvement value is what triggers them, so a reroof after other recent work can cross the threshold on its own. And commercial or multifamily buildings can fall under the county's Ch. 233 authority where it has been adopted.
Texas has no statewide product approval system and no central listing to check a roofing product against. Hail is the governing risk across East Texas, and impact-resistant Class 3 and Class 4 shingles carry insurance premium credits from most carriers. Under Tex. Prop. Code §202.011 a property owners' association cannot prohibit wind or hail resistant shingles, or shingles that improve energy efficiency.
Medina County sits on the Hill Country edge west of San Antonio at roughly 105 to 115 mph ultimate design wind speed under the codes regional cities adopt, far from the designated catastrophe area and outside any TDI windstorm requirement. Hail governs, and the overlay that matters here is water quality rather than wind.
Texas has no statewide building code and no statewide general contractor license. In the unincorporated county the practical compliance surface is the trades — TDLR for electrical and mechanical, the TSBPE for plumbing — plus the county's environmental and floodplain records, rather than a building department.
Medina County permit cost and fees
Medina County charges no building permit fees because it issues no building permits. Costs attach to OSSF permitting and its licensed site evaluation, floodplain permitting where applicable, platting, road access, and water well permitting through the groundwater district.
Where the Edwards Aquifer overlay applies, the protection plan and its engineering are frequently the largest single cost and the longest timeline on the project — and they sit outside county permitting entirely.
| Fee component | How it works |
|---|---|
| Building permit | None — not issued by the county |
| OSSF permit | County fee plus licensed site evaluation and system design |
| Recharge zone OSSF | Special requirements under 30 TAC 285.40 increase design cost |
| Edwards Aquifer protection plan | Separate agency; engineering and review, often the longest track |
| Subdivision plat | Filing and review fees, plus survey and engineering |
| Water well | Medina County Groundwater Conservation District fees |
Planning a build in unincorporated Medina County? Send us the parcel and scope and we’ll confirm jurisdiction, check the aquifer position, and map the records that apply.
Medina County trade permits
There is no county trade permit program in unincorporated Medina County. Electrical, plumbing, and mechanical work is neither permitted nor inspected by the county. On-site sewage is the exception and it is permitted and inspected.
Electrical
No county permit or inspection. A TDLR-licensed electrician remains the standard, and TDLR retains enforcement authority in unincorporated areas.
Plumbing
No county permit for interior plumbing. The septic system is permitted through environmental health, with special requirements over the recharge zone.
Mechanical / HVAC
No county permit or inspection. TDLR licensure applies to the contractor regardless of whether a permit exists.
Water wells
Permitted through the Medina County Groundwater Conservation District rather than the county.
Medina County permit application: how to apply step by step
Check against Hondo, Castroville, Devine, Lytle, Natalia, and La Coste, and their ETJs. San Antonio-side growth has moved these boundaries.
Determine whether the parcel sits over the recharge or contributing zone. This drives both OSSF design requirements and any protection plan obligation.
Soil testing on the specific parcel is required for OSSF permitting. Over the recharge zone, 30 TAC 285.40 imposes special requirements.
File with county environmental health. Aerobic systems carry a continuous maintenance contract and a recorded affidavit.
Edwards Aquifer protection plans go through the EAA and TCEQ; water wells through the Medina County Groundwater Conservation District.
Determine flood hazard status, work platting through Commissioners Court if dividing land, obtain a 911 address, and permit driveway access.
Inspections in Medina County
Medina County performs no residential construction inspections in unincorporated areas. There is no foundation, framing, rough-in, or final building inspection, and no county certificate of occupancy.
On-site sewage installations are inspected as part of the permitting process, and aerobic and surface application systems carry continuing maintenance and inspection obligations under state rules — with additional requirements over the Edwards Aquifer recharge zone.
Private third-party inspection is worth considering on a new build. In a county that generates no construction record, it is the only independent documentation a lender, insurer, or future buyer will have.
Medina County permit search and official resources
- Medina County, Texas — official site
- TCEQ — on-site sewage facilities for homeowners
- TCEQ — getting a permit for an OSSF
- Texas Department of Licensing and Regulation
Frequently asked questions
Who issues building permits in Medina County?
No one, for general residential construction in unincorporated areas — Medina County has no adopted residential building code and no building inspection program. The records that do apply are administered separately: on-site sewage through Medina County Environmental Health, floodplain development through the county floodplain administrator, plats through Commissioners Court, and road access through the precincts. Inside Hondo city limits, the city permits normally.
How do I get a permit in Medina County?
Start by confirming the parcel is actually unincorporated, because that single question changes everything and a mailing address will not answer it. If it is, work the records the county does issue rather than looking for a building permit: septic first, since it constrains siting and carries the longest lead time, then floodplain, plat, addressing, and road access as the project triggers them.
What codes apply in Medina County?
Texas has no statewide building code, and Medina County has not adopted one for unincorporated areas, so no building code is enforced there. State rules still govern on-site sewage facilities, and the county’s floodplain ordinance governs development in mapped flood hazard areas. Trade work remains subject to state licensing through TDLR and the TSBPE. Inside city limits, the municipality’s adopted codes apply in full.
Does Medina County issue building permits?
No, not for general residential construction in unincorporated areas. The county has no adopted residential building code and no building inspection program, which is the standard Texas county position. On-site sewage permitting, floodplain requirements, subdivision platting, addressing, and county road access are the records that do apply — alongside Edwards Aquifer requirements where the parcel sits over the recharge or contributing zone.
How does the Edwards Aquifer affect a Medina County build?
Two ways. TCEQ rules at 30 TAC 285.40 impose special requirements on on-site sewage facilities located in the Edwards Aquifer recharge zone, which changes system design and cost. And separately, development with significant ground disturbance over the recharge or contributing zone can require a water pollution abatement or protection plan through the Edwards Aquifer Authority and TCEQ — a track that sits outside county permitting and frequently sets the project schedule.
What about property inside Hondo or Castroville?
Then the county guidance does not apply. Hondo is the county seat, and Castroville, Devine, Lytle, Natalia, and La Coste each permit and inspect construction inside their limits as normal municipal building departments. Because growth from San Antonio has pushed city limits and ETJs outward along the US 90 and IH-35 corridors, confirm the parcel against current boundaries rather than relying on how the area was classified a few years ago.
Do I need a permit to install solar panels in Medina County?
Yes. Photovoltaic installations in Medina County are permitted under a dedicated solar record type reviewed on both a structural and an electrical track. Solar thermal — passive water and pool heating — is a separate record. Under Tex. Prop. Code §202.010 a homeowners' association cannot ban a solar energy device outright, but it may still require prior architectural approval and impose reasonable placement conditions, so run the HOA submittal alongside the permit. Since September 1, 2025, Tex. Local Gov't Code §247.0025 (SB 1202) also permits third-party plan review and inspection of home backup power installations — generators and energy storage for one- and two-family dwellings at 600 volts or less — in place of jurisdiction review. Utility interconnection and Permission to Operate still run in parallel.
Does a roof replacement require a permit in Medina County?
Yes, in most cases. A roof covering replacement requires a permit in most Texas municipalities including Medina County, though minor repairs can fall below the local threshold. Texas has no statewide product approval system and no central product listing, so compliance runs against the locally adopted code edition and its local amendments. Hail rather than wind is the governing risk inland, and Tex. Prop. Code §202.011 bars an HOA from prohibiting wind or hail resistant shingles.
What is the difference between a residential and a commercial permit in Medina County?
In a Texas county it is the difference between no county jurisdiction and possible county jurisdiction. Residential construction in unincorporated Medina County is largely outside county authority. New commercial, public-accessible, and multifamily buildings, plus substantial improvements, are the categories Local Government Code ch. 233 lets a county reach — but only where Commissioners Court has adopted that authority, so confirm it rather than assuming.
Do trade permits need to be pulled separately in Medina County?
Not in unincorporated Medina County — there is no county trade permit program and no county trade inspection. Electrical, plumbing, and mechanical work should still be performed by contractors licensed through TDLR and the TSBPE, and the septic connection is permitted and inspected separately. Inside city limits, trade permits work normally.
What happens if I file under the wrong permit type in Medina County?
Because Medina County does not run a building permit program, the more common failure is filing nothing at all — assuming that no building permit means no requirements, and missing the septic, floodplain, plat, or addressing record the project actually triggered. Those are enforced, and unwinding them after construction is materially harder than filing them in order.
Can I apply for all Medina County permit types online?
Largely no. Medina County administers its records through county offices at Hondo rather than a unified permitting portal, and it publishes less permitting detail online than the larger Texas counties. Expect a manual, phone-and-counter process, and note that Edwards Aquifer and water well approvals run through separate agencies entirely.
Simplify Medina County permitting with Alliance Permitting
A Hill Country edge county with no building department, an Edwards Aquifer overlay that can set the schedule, and groundwater administered by a separate district — Medina County projects turn on establishing site conditions before design. Alliance Permitting is a permit expediter for Medina County: we check the aquifer and septic position first.
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Contractors and builders choose Alliance for Medina County because we deliver:
- Local expertise — we know how the Edwards Aquifer overlay and recharge-zone OSSF rules shape a Medina County build.
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Alliance Permitting is a permit documentation and submission company: we prepare your paperwork, file it correctly, and coordinate with the authority having jurisdiction through issuance. We are not a contractor and do not perform licensed plan review or inspections; that work stays with your team and the jurisdiction.
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More Texas permitting guides
This guide is provided by Alliance Permitting for general informational purposes and reflects publicly available information believed accurate as of July 2026. Permit requirements, fees, and processes change; always confirm current details with Medina County before filing. This is not legal advice.