Castroville, Texas metal buildings
Metal buildings in Castroville, from a garage behind a house to a pole barn or a commercial building on Highway 90, go through the city inside the limits and through Medina County outside them. Each request lands with a single independent metal building contractor, who alone decides which jobs to take.
The city rules are specific: any accessory building over 200 square feet needs a permit, a metal building on the Highway 90 commercial strip has to wear stone, stucco or another permitted material on its front and sides, and new construction in the historic district goes to the Historic Landmark Commission first (City of Castroville permit page and Comprehensive Zoning Ordinance, checked 2026-09-27).
- Sheet
- Town
- Jurisdiction
- Castroville, Medina County, TX
- Checked
- 2026-09-27
- Sources
- 22 primary documents
Lot in or around Castroville? Each request goes to one independent contractor, whose call it is which jobs to accept.
Who issues the permit for a metal building in Castroville, and who does past the city limits?
The Community Development Department at 703 Paris Street, 830-931-4090, for anything inside the city limits. Plans and the application go by email to [email protected], the fee rides on the construction valuation and is paid before review starts, and a third-party firm, Bureau Veritas, does the inspections. The city commercial guide says plan review usually runs two to four weeks, while its building permit presentation puts a typical review at about 10 business days. Construction has to start within 180 days of the permit, with at least one inspection in every 180-day stretch, or the work counts as abandoned and needs a new permit.
Check the code year before the engineer starts. The commercial guide and the permit presentation both list 2012 editions of the International Building, Residential, Fire and Energy Conservation Codes, with the 2014 National Electric Code, while the permit page itself names the International Building Code with no year.
Past the limits the answer changes. A city has no state-law power to demand its own building permit in its extraterritorial jurisdiction, and Medina County's published list of required permits carries no building permit at all (Medina County permit list, checked 2026-09-13). That is a statement about what the county lists, not a finding that the lot is unregulated: septic, floodplain and driveway permits still apply there, and the Medina County sheet gives each office and phone.
Checked at City of Castroville Community Development, commercial permit process guide and applications, 2026-09-27.
Checked at City of Castroville Community Development, building permits process and expectations presentation, 2026-09-27.
Checked at City of Castroville Community Development, permitting, 2026-09-27.
Checked at Texas Legislature Online, Local Government Code Chapter 212, municipal regulation of subdivisions and property development, 2026-09-13.
Checked, and the item is not there. Checked at Medina County, What Type of Permits Are Required In Medina County?, 2026-09-13.
When does a metal garage, carport or shop in Castroville need a permit?
Once it passes 200 square feet, or at any size once it carries electric, plumbing or mechanical work. The city list of permit-free work covers residential permits only, and it names the awning, carport, garage, greenhouse, pergola, porch, shed, storage building and pool house among the accessory structures that need one above that size. On any other zoning, call Community Development before counting on an exemption.
Where it can sit comes from the zoning ordinance. On a residential lot an accessory building stays out of the front and street side yards, at least five feet from an interior side or rear lot line, 15 feet from a line along a street and 10 feet from the house, no taller than 25 feet, and accessory buildings together may cover no more than 35 percent of the required rear and side yards. In the R-A, R-C and H-E districts the ordinance allows an accessory structure only in conjunction with the principal building, so ask before planning a shop on a lot with no house. On a commercial lot an accessory building goes on the half of the lot farthest from the street.
The fee comes off the valuation. On the fee schedule the city posts from its FY 2024 budget, a building valued at $100,000 carries a $993.75 permit fee, plus $5.60 for each $1,000 above that up to $500,000, a plan review fee of 65 percent of the permit fee where it applies, and double the fee for work started without a permit. A new house is priced by the square foot instead, at $0.53.
Checked at City of Castroville Community Development, permitting, 2026-09-27.
Checked at City of Castroville, Comprehensive Zoning Ordinance, amended through 2022, 2026-09-27.
Checked at City of Castroville, comprehensive fee schedule, FY 2024 adopted budget, 2026-09-27.
What does Castroville require of a metal building on Highway 90?
Yes, dressed. The commercial strip along U.S. Highway 90 is zoned in three C-H districts, and the design criteria for them prohibit a metal building unless every front and side exterior wall is finished in permitted materials: limestone, native stone, stucco, rustic solid wood, granite or marble. Where the back of the building can be seen from Highway 90, it gets the same finish, and no front or side wall may be more than 30 percent glass. A metal roof is permitted; corrugated or painted metal roofing needs a specific use permit.
The paperwork starts with a meeting. In the C-H districts no building permit issues for exterior work on a commercial property until Community Development signs a Design Review Letter, and the ordinance requires a pre-application meeting before that application; a denial can be appealed to the Planning and Zoning Commission within 10 business days. The site plan keeps 15 percent of the lot as green space, with landscaping strips at least 10 feet wide along the streets. The city commercial checklist and application ask for elevations showing the exterior materials, a site plan from a boundary survey, a sealed engineered foundation plan, and the TDLR registration that a project of $50,000 or more needs: the $50,000 TDLR sheet. For the building itself, see commercial steel buildings.
| District | From | To | Height limit |
|---|---|---|---|
| C-H West | Western city limit | Constantinople Street | 40 feet or three stories |
| C-H Central | Constantinople Street | Medina River | 30 feet or two and a half stories |
| C-H East | Medina River | Eastern city limit | 40 feet or three stories |
Checked at City of Castroville, Comprehensive Zoning Ordinance, amended through 2022, 2026-09-27.
Checked at City of Castroville Community Development, commercial permit process guide and applications, 2026-09-27.
Checked at Texas Department of Licensing and Regulation, Architectural Barriers frequently asked questions, 2026-09-13.
Is the lot in the Castroville historic district?
Ask before drawing anything. New construction on property in a designated historic district or on a landmark needs a Certificate of Appropriateness before the building permit, filed with the Historic Preservation Officer and decided within 30 days of a complete application; if no action comes in 30 days, the certificate issues. It sits on top of the building permit, never in place of it.
The application is $100 and wants photographs of every elevation, material samples and a written case for why the change fits, and the Historic Landmark Commission has the final say without going to City Council. The review applies the Secretary of the Interior Standards and asks whether the work harms a district the ordinance describes as log, stone and frame buildings in the Alsatian, German, Early Texas and Victorian styles.
Checked at City of Castroville, Comprehensive Zoning Ordinance, amended through 2022, 2026-09-27.
Checked at City of Castroville, Certificate of Appropriateness application, 2026-09-27.
What is under a slab in Castroville, and where does the ground flood?
Clay, for the most part. Laying the NRCS soil survey over the town limits, this site measures Knippa clay under about 35 percent of the town, and NRCS rates Knippa very limited for small commercial buildings because the clay shrinks and swells. Roughly 78 percent of the mapped ground inside the limits shares that rating. The better ground is Atco loam and Sabenyo clay loam, together about 15 percent and rated not limited, and one soil even shares the town name: Castroville clay loam, about four percent, rated somewhat limited.
About 14 percent of the ground inside the limits is floodplain soil mapped as occasionally or frequently flooded, the largest being Divot clay loam, where NRCS lists occasional flooding from May through September. Inside the city a floodplain development permit comes before any work in a FEMA Special Flood Hazard Area, lapses if work does not start within six months, and the building cannot be used until a Certificate of Compliance issues; a floodproofed non-residential building needs an engineer to certify it, and work in the floodway needs an engineer to certify no rise. The zoning ordinance adds that nothing but an accessory structure goes up in a flood-prone area unless its finished floor sits at least one foot above the flood elevation.
The city commercial and residential permit applications both list a sealed engineered foundation plan among the items to include where it applies, which is where that clay gets answered. Outside the limits, Medina County Environmental Health, 830-741-6195, takes the floodplain permit at $45.00 and accepts only the 2020 FEMA maps (county record, checked 2026-09-13). The slab and foundation sheet covers the foundation plan, the anchor bolts and the soil report.
| Soil map unit | Share of the city | NRCS rating | Reason listed |
|---|---|---|---|
| Knippa clay, 0 to 1 percent slopes | 34.8 percent | Very limited | Shrink-swell |
| Divot clay loam, occasionally flooded | 9.5 percent | Very limited | Flooding, shrink-swell |
| Sabenyo clay loam, 1 to 5 percent slopes | 7.4 percent | Not limited | None listed |
| Kincheloe soils, 10 to 30 percent slopes | 7.2 percent | Very limited | Slope, shrink-swell, risk the ground sinks |
| Atco loam, 0 to 1 percent slopes | 6.2 percent | Not limited | None listed |
Checked at USDA Natural Resources Conservation Service, soil survey of Medina County, Texas (SSURGO TX325, version of 2025-09-04), read through Soil Data Access against the Census Bureau Castroville city boundary, 2026-09-27.
Checked at City of Castroville, floodplain development permit application, 2026-09-27.
Checked at City of Castroville, Comprehensive Zoning Ordinance, amended through 2022, 2026-09-27.
Checked at City of Castroville Community Development, commercial permit process guide and applications, 2026-09-27.
Checked at City of Castroville Community Development, residential construction permit application, 2026-09-27.
Checked at Medina County, Medina County Environmental Health Group, 2026-09-13.
Utilities, septic and the Edwards Aquifer around Castroville
Inside the city, Castroville is the utility: it owns and runs the electric, natural gas, water and wastewater service, holding its own state certificate for electric. New service takes proof of ownership, impact fees apply to new water and wastewater service, and a new service goes in within 15 business days after approval, payment and a notice to proceed from the building inspector. A commercial account opens with a $500 deposit.
Outside the city, septic is a Medina County Environmental Health permit, required for every system in the county, at $200 for a conventional system or $400 for an aerobic one, and a lot off public water needs a registered well through the Medina County Ground Water Conservation District, 830-741-3162 (county records, checked 2026-09-13).
Medina is one of the counties the TCEQ Edwards Aquifer program names, but the town sits off the regulated zones: the TCEQ zone map puts no recharge, transition or contributing zone within Castroville, and the closest regulated ground, a transition zone, sits roughly seven and a half miles out from the center of town. A lot outside town can still land on one, so check the address on the TCEQ map, and because the Edwards Aquifer Authority covers all of Medina County, a new well into the aquifer needs its $25 permit application first: the Edwards Aquifer sheet.
Checked at City of Castroville, utility service policies, amended July 8, 2025, 2026-09-27.
Checked at City of Castroville, utility billing and customer service, 2026-09-27.
Checked at Texas Commission on Environmental Quality, Edwards Aquifer regulated zones map service, queried against the Census Bureau TIGERweb Castroville city boundary, 2026-09-27.
Checked at Texas Commission on Environmental Quality, Edwards Aquifer Protection Program, 2026-09-13.
Checked at Edwards Aquifer Authority, learn about the aquifer, 2026-09-13.
Checked at Edwards Aquifer Authority, well closure procedures and construction, 2026-09-13.
Checked at Medina County, What Type of Permits Are Required In Medina County?, 2026-09-13.
Checked at Medina County, Medina County Environmental Health Group, 2026-09-13.
Getting a Castroville metal building priced
Three things set the number before the steel does: whether the lot is residential, on the Highway 90 strip or in the historic district; how the soil report reads that Knippa clay; and whether any of the lot is mapped floodplain. A Highway 90 building priced with bare metal walls leaves out the stone or stucco the city requires on its front and sides.
One independent metal building contractor receives the request and decides whether to take the job. Texas has no builder license to check, and Castroville has every contractor and subcontractor register with the city before a permit. For a garage or carport behind a house, start at detached garages and RV garages; for a pole barn on a bigger tract past the limits, pole barns and post-frame buildings; the whole sequence is in the start-to-finish San Antonio guide.
Checked at Sunset Advisory Commission, Texas Residential Construction Commission; TDLR regulated industries list, 2026-09-13.
Checked at City of Castroville Community Development, commercial permit process guide and applications, 2026-09-27.