Building permits, zoning and septic rules in Jackson County, Texas

It depends on where the parcel sits relative to the floodplain. Unincorporated Jackson County requires a floodplain determination application for any proposed development, with a $20 processing fee⁴. If the property is outside the Special Flood Hazard Area, no Development Permit is necessary unless otherwise noted; if it is inside, a Development Permit is mandatory and more steps follow, including an elevation certificate^4,9. Placing a manufactured home or RV counts as development⁴. Published fees run $75 for a residential structure under 2000 square feet and $100 above that¹⁰. The county's materials do not establish a general building-code permit requirement beyond this development and floodplain process, and Texas law gives counties building-permit power only in narrow situations tied to population or an international border^4,11. In a regulated floodplain, no occupancy may occur before all permits are released, and a certificate of occupancy follows the final elevation certificate⁴.

Jackson County's Office of Permitting & Inspection is reached at 361-782-7552 (fax 361-782-0500) from 411 N. Wells - Room 130, Edna, Texas 77957, with office hours Monday through Thursday, 8:00 am to 4:30 pm, and Friday, 8:00 am to 12:00 pm⁵. The same office and number handle commercial and pipeline permits, along with residential development, floodplain and septic permitting⁵. Applications, the county's Flood Damage Prevention Ordinance, Subdivision Regulations and On-Site Sewage Facility rules are all posted on the county's own site as downloadable forms⁵. If you're developing a multi-space manufactured-home rental community rather than placing one home on your own lot, a separate Manufactured Homes Regulations order adds its own survey, infrastructure and bonding requirements on top of the standard permits⁵. The residential OSSF permit fee is $250¹⁰.

Jackson County has no zoning ordinance, so the county sets no minimum lot size, no setback, no lot-coverage limit and no building-height limit anywhere in unincorporated land^1,2. Without a zoning ordinance, the county also places no zoning-based restriction on an accessory dwelling, an RV, a tiny home or a manufactured home used as a residence². That doesn't remove the county's other tools, though: its Office of Permitting & Inspection still runs development, floodplain, septic and subdivision permitting programs across unincorporated Jackson County⁵. Placing a single manufactured home on your own lot counts as development and goes through the floodplain determination process⁴; only a multi-space rental community triggers the county's separate Manufactured Homes Regulations order⁵. Inside the City of Edna, city zoning applies and the county's answer does not; call the city before buying there³. Dividing land is regulated by the county's Subdivision Regulations, which come with an Application for Subdivision on the Permitting page¹².

Jackson County requires a septic permit for on-site sewage facilities (OSSF) and administers the program itself, having adopted its own Order Adopting Rules of Jackson County, Texas for On-Site Sewage Facilities as the Texas Commission on Environmental Quality's authorized agent^4,5. That local authority matters more here than in most counties: essentially none of Jackson County's land -- about 0% by soil-survey data -- is rated free of severe limits for a conventional septic drain field, so budget for a site evaluation and very likely an alternative or engineered system on any given parcel⁷. Statewide, Texas law lets a single-family home on at least 10 acres skip the OSSF permit if it meets a list of conditions, including being the only dwelling on the tract, and the county's own guidelines say the 10-acre rule does not exempt the owner from the other state regulations or the site-and-soil filing^6,13. With soils this limited, an exemption doesn't remove the practical engineering challenge. The county will not issue an OSSF permit until the floodplain determination application and any associated flood-area permit are granted, except for replacements⁴. The residential OSSF permit fee is $250¹⁰. Texas requires a permit for most septic installations, so confirm with the county before relying on the 10-acre exception⁶. An authorized agent like Jackson County, or its designated representative, reviews plans, issues the permit and inspects installation¹⁴.

Jackson County places no zoning-based restriction on RV occupancy, tiny-home occupancy or manufactured-home occupancy on private land, because the county has no zoning ordinance to set one^1,2. That's a direct result of state law: Texas gives counties zoning power only in specific, narrow situations, and Jackson County doesn't fall into any of them². Removing a zoning restriction doesn't remove the county's floodplain process, though: placing a manufactured home or RV counts as development, and inside a Special Flood Hazard Area a Development Permit is mandatory⁴. It also doesn't change the septic math: any home, manufactured home or long-term RV setup on your own lot still has to solve for soils that are essentially all rated severely limited for a conventional drain field⁷. If you're placing multiple RVs or manufactured homes as a rental operation rather than one home on your own parcel, the county's separate Manufactured Homes Regulations order applies instead of the standard process⁵.

1. File the floodplain determination application first, with an official 911 address, proof of ownership and the $20 fee; outside a Special Flood Hazard Area no further documentation is necessary and applicable permits are released after fees are paid, while inside one you must obtain a Development Permit and an elevation certificate^4,9.
2. Get a septic site evaluation early: with virtually none of the county's soil rated free of severe limits for a conventional drain field, budget time and money for an engineered system^5,7.
3. Apply for your septic (OSSF) permit through Jackson County's Office of Permitting & Inspection, which administers its own adopted rules as TCEQ's authorized agent^4,5.
4. Submit any required development permit application for a new residential structure, addition, barn/shop or manufactured home to the Office of Permitting & Inspection at 411 N. Wells - Room 130, Edna, Texas 77957, 361-782-7552⁵.
5. If your driveway connects to a state highway, submit TxDOT's Form 1058 and get a fully executed driveway permit, giving TxDOT 24-hour notice, before starting construction¹⁵.
6. Budget for property tax: Jackson County runs about a 1.1% effective rate, with a median bill near $1,847 a year⁷.

Start with the floodplain: ask the Office of Permitting & Inspection for a floodplain determination, because a parcel inside a Special Flood Hazard Area needs a Development Permit and an elevation certificate, and residential development in an identified floodway is prohibited without a No Impact Certificate and Study⁹. Jackson County is genuinely rural: density runs about 18.4 people per square mile across roughly 15,221 residents, and the nearest city of 100,000 or more is about 71 miles from the county center⁷. Terrain is flat and mostly open -- all of the county sits at 15% slope or less, and only about 17.1% is wooded⁷. Septic is the single biggest thing to plan around here: essentially 0% of Jackson County's land is rated free of severe limits for a conventional drain field, so get a site evaluation before you commit to a specific parcel⁷. For water, Jackson County does not require a drilling permit for water wells, but a written notice of intent to drill goes to the groundwater district before drilling begins⁸. Rainfall averages about 42.1 inches a year, with severe drought in roughly 19.1% of recent years, and federal land is minimal at about 2.1% of the county⁷. Farmland has recently valued around $4,107 an acre and a typical home around $213,544, against a roughly 1.1% effective property tax rate and a median bill near $1,847 a year⁷. Local utility providers commonly require the county's Utility Permit before connecting service, so ask the Office of Permitting & Inspection and the provider early⁴.