Building permits, zoning and land rules in Hidalgo County, Texas

Yes. Hidalgo County requires a development permit for the construction of any structure, and it must be approved before improvements begin¹. The application fee is doubled for work that starts or a structure that is moved in before approval¹. The application also acknowledges compliance with the county Fire Marshal building code requirements, the county floodplain order and the county order on on-site sewage facilities¹.

The Planning Department checks the work at the foundation stage: call 48 hours before pouring so staff can inspect setbacks from property lines and finished-floor elevation¹. The department also issues the light and water certificates a utility needs before connecting service⁵. Add a Floodplain Development Permit where the parcel is in a mapped flood zone⁸.

Start with the Hidalgo County Planning Department, which runs the Permitting Division, at (956) 318-2840, out of 2818 S. Business Hwy 281 in Edinburg⁵. The department also staffs a Pct. 1 substation at (956) 968-4734 and a Pct. 3 substation at (956) 205-7045⁵. Planning decides whether a property is under county jurisdiction or inside a city's extraterritorial jurisdiction, and the applicant then follows that city's or the county's rules⁹.

Septic permits are a separate office: the county's Health & Human Services Environmental Health division handles on-site sewage facility (OSSF) applications for land outside city limits^3,10. A driveway directly onto a state highway needs a TxDOT permit through the local district office, not the county¹¹.

No. Hidalgo County states that it does not have zoning authority under the Texas Local Government Code². In unincorporated areas, no county rule sets minimum lot size, setbacks, building height, lot coverage, minimum home size or restrictions on accessory dwellings and manufactured homes⁶.

Cities are different. Incorporated municipalities administer their own zoning; Pharr, for example, lists 17 land use categories from Agricultural and Single Family Residential to Heavy Industrial⁴. Confirm whether a parcel is inside a city before assuming the county answer applies.

No county zoning does not mean no setbacks. The Planning Department reviews site plans for compliance with setback requirements recorded on a subdivision plat, and no further division of land may happen without first preparing a subdivision plat^1,5.

Every onsite sewage facility (OSSF) in Texas needs a permit before it is built, altered, extended or repaired, unless a narrow exemption applies¹². Hidalgo County's OSSF rules apply to all of the county except areas inside municipalities, and applications need Environmental Health Department approval³. The county's application form is explicit that you should not begin construction before approval, and a separate permit is required for installing the septic tank itself^1,10.

On a lot under half an acre with no sanitary sewer, a licensed engineer must prepare the OSSF design plan⁹. Environmental Health inspects and confirms that the system is adequate for the proposed structure's size⁹. Septic tanks are restricted in all County Floodplain Hazard Areas³. No final light or water clearance is issued until the residence is connected to the OSSF and county requirements are met⁹.

State law also exempts some single-family homes on at least 10 acres from the permit, with strict conditions; the county's own materials do not mention that exemption, so ask Environmental Health before relying on it¹². Only about 67.8% of the county's land has soil without severe limitations for a conventional drain field, so get a site evaluation first¹³.

Hidalgo County has no county zoning, but effective January 1, 2025, the Planning Department stopped granting development permits and utility clearances for travel trailers, RVs or motor homes intended as primary residences^2,5. That policy withholds the light and water certificate an RV would need for permanent electric and water service⁵.

A manufactured or site-built tiny home takes a different path: no county zoning rule restricts one on unincorporated land, but it still needs the development permit, a septic permit if there is no sewer, and the utility clearance^1,6,9. Inside a city, the city's zoning applies instead⁴. Call the Planning Department before buying a parcel if you plan to live in an RV while you build, since the policy is recent and could change⁵.

1. Confirm the parcel is unincorporated Hidalgo County land, not inside a city or its extraterritorial jurisdiction, and whether it sits in a platted subdivision^5,9.
2. Call the Hidalgo County Planning Department at (956) 318-2840 to file the Chapter 232 development application, and ask whether the parcel needs a Floodplain Development Permit^5,8.
3. Apply for the OSSF permit through county Environmental Health before you dig, and budget for a site evaluation^3,13.
4. Call Planning 48 hours before pouring the foundation for the setback and floor-elevation inspection¹.
5. If your driveway meets a state highway, file TxDOT Form 1058 and wait for the executed permit before working in the right of way¹¹.
6. Request the light and water certificate from Planning once the county requirements are met; it is not available for an RV used as a primary residence^5,9.

Ask the Planning Department whether the parcel sits inside a platted subdivision, since that changes whether a recorded plat setback applies⁵. Ask directly whether it is in a mapped floodplain: in zones A, AE, AH and AO, no clearance is issued until the County Flood Plain Administrator approves a development permit with an elevation certificate¹. If you're picturing living in an RV while you build, know that Hidalgo County stopped issuing utility clearances for that use on January 1, 2025⁵. Soils are workable but not universal: 67.8% of the county's land has soil without severe limitations for a conventional septic drain field, better than many rural counties, but still worth a site evaluation before you commit¹³. This is a genuinely urban-adjacent county for "rural" land: population density runs about 571.9 people per square mile and the nearest metro area is only about 5 miles away, so a "rural" Hidalgo County parcel is usually at the edge of a fast-growing metro, not deep country¹³. Land and homes are mid-priced for Texas: farmland has sold for a typical $4,088 an acre, and the typical home value is about $194,551¹³. Property taxes run above the state's rural average: an effective rate near 1.8% and a median annual bill around $2,187¹³.