Unincorporated Gregg County, Texas does not require a building permit or inspection for a house1. County zoning does not set setbacks, minimum home size, or RV occupancy on unincorporated land, but city rules differ: Longview and Kilgore have zoning, and Kilgore has an adopted building code234. The permit most rural buyers do need is for septic, handled by the Gregg County Health Department5.
At a glance
- Building permit
- Not required in unincorporated Gregg County1
- Zoning
- No county zoning in unincorporated areas; Longview and Kilgore zone inside their limits637
- Septic permit
- Required; issued by the Gregg County Health Department89
- RV / tiny home living
- Unrestricted by county zoning (no zoning authority)2
- Minimum lot size (conventional septic)
- 0.5 acre with community water, 1 acre with a well10
- Septic permit fee
- $350 for a conventional design; professional-design fees vary by use1112
- Owner-builder exemption
- Limited penalty exemption for a primary residence; conditions apply13
Who to call
Septic permits
Gregg County Health Department (septic systems / OSSF permits)
On-site sewage facility (OSSF/septic) permits, plan review and inspections for Gregg County
405 East Marshall Avenue, Longview, Texas 75601
Also useful
County government's general contact for questions the county's departments do not cover, such as whether any commissioners court building or floodplain rules apply; Gregg County has no building department
Gregg County Courthouse 101 E. Methvin, Suite 300 Longview, TX 75601
Contact details are copied from each office’s official page and were checked against it on October 10, 2026.
Off-grid gear
Going off-grid in Gregg County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in Gregg County, Texas?
Gregg County, Texas does not require a building permit for a house in an unincorporated area1. Texas gives counties only limited authority to require building permits or codes outside incorporated cities: fire-code permitting for certain large buildings applies only in counties over 250,000 people or next to one, and residential standards require a commissioners court resolution14. We could not confirm that Gregg County adopted such a resolution, so ask the County Judge's office at 903-236-8420 about unusual projects15. State law requires three inspections of new residential construction only in a county that has adopted a resolution or order applying Subchapter F, and we could not confirm that Gregg County has16. City limits change the answer: Kilgore has adopted and enforces a municipal building code4.
Who handles septic and permits in Gregg County, and how do you reach them?
There is no separate building department to call for an ordinary house in unincorporated Gregg County1. The office a rural land buyer usually needs is the Gregg County Health Department's Septic Systems program, reached at (903) 237-2621, 405 East Marshall Avenue, Longview5. The Health Department reviews on-site sewage facility applications and issues the Permit to Operate after inspection9. If the parcel is inside Kilgore, use the city's development process because Kilgore has zoning and an adopted building code174. Inside Longview, the city handles zoning changes and variances through its Planning and Zoning Division3. In either city, ask the Health Department whether the address falls under its septic program, because a separately authorized municipal jurisdiction may have its own authority18. A driveway connecting to a state highway requires TxDOT's Form 105819.
Does Gregg County have zoning?
Gregg County has no countywide zoning ordinance6. On unincorporated land, county zoning sets no minimum home size, setbacks, lot coverage limits, or restrictions on accessory dwellings, RVs, tiny homes, manufactured homes, and temporary camping2. Local zoning nevertheless varies across Gregg County because incorporated cities may apply their own rules7. Kilgore, for example, has municipal zoning requirements17. Confirm the parcel's jurisdiction before relying on the unincorporated-area answer; the absence of county zoning also does not remove septic or state-highway-access requirements.
How do septic permits work in Gregg County?
Every on-site sewage facility (OSSF) in Texas needs a permit before it is built, altered, extended, or repaired, and the Gregg County Health Department issues local permits208. A conventional-design permit costs $350 and generally requires at least a half-acre with community water or a full acre with a well; undersized lots platted before January 1, 1988 may receive individual review11. Professionally designed systems cost $350 for a single-family home and $450 for commercial use12. Only about 5.3% of Gregg County soils lack severe limitations for a conventional drain field, so get the site evaluated before assuming a conventional design will work21. A Registered Sanitarian or Professional Engineer must prepare the site evaluation and design plan, and approval is required before construction22. Call the office at least 1 working day ahead for the inspection before the system is covered; if someone other than the owner builds it, that person must hold a Texas Installer Certificate22. The system cannot be used until inspection and approval9. The state 10-acre exemption applies only when all stated conditions are met, including keeping the OSSF at least 100 feet from every property line20.
Can you live in an RV or tiny home on your land in Gregg County?
Gregg County's lack of zoning authority means the county itself does not restrict RV, manufactured home or tiny-home occupancy on unincorporated land2. That does not exempt you from Texas's septic rules: any wastewater from an RV, tiny home or off-grid dwelling still has to go through an approved OSSF, and a holding tank is only allowed where other sewage disposal is not feasible, must have a high-level alarm at 75% capacity, and needs a pumping contract on file before installation23. Confirm with the Gregg County Health Department how your specific setup will be permitted before you move a camper or tiny home onto raw land5.
How do you build a home in Gregg County, step by step?
- Confirm whether the parcel is unincorporated or inside a city; local zoning varies, and Kilgore has zoning and an adopted building code74.
- For an ordinary house on unincorporated land, Gregg County does not require a building permit1.
- Apply for the septic permit before fixing the house site, because the approved layout affects where construction can go524.
- Complete the required site evaluation and design, then obtain authorization before installing the system24.
- File TxDOT Form 1058 before building a driveway that connects to a state highway19.
- Schedule the septic inspection with at least one working day's notice and leave the system uncovered until approval24.
What should you check before buying land in Gregg County?
Budget for septic first: with only 5.3% of county soils free of severe limitations for a conventional drain field, get a site evaluation before you commit to a parcel21. Farmland in Gregg County has recently averaged about $6,992 an acre and a typical home is valued around $225,144, so weigh raw-land and septic costs together2526. The county sees severe drought in roughly 14.9% of years, which matters for a private well or pond27, and it sits about 29 miles from the nearest metro area28. Property taxes run about 1.2% of value29, with a median bill near $2,27130. Floodplain development rules and a countywide certificate-of-occupancy requirement were not confirmed on the county's official site as of this review, so ask the County Judge's office or Emergency Management directly if your parcel is anywhere near a floodplain.
Watch-outs
- Whether Gregg County has adopted any residential building-code resolution under state law was not confirmed on the county's official site; call the County Judge's office before you assume no inspection will ever apply14.
- Gregg County's official services listing names no floodplain department alongside its other services1, so floodplain development rules for unincorporated Gregg County were not confirmable; ask Emergency Management or the County Judge's office if your parcel is near a floodplain.
- The Texas owner-builder provision only exempts a person building a primary residence from the penalty for missing a Chapter 233 inspection notice; it does not waive building codes, inspections, septic permits, or other requirements, and it matters only where the underlying county provisions apply13.
Sources
- Gregg County Services Overview (2026 county census)
- Texas law on county zoning and building authority
- Planning and Zoning, quoted and re-checked
- Current Building Code, quoted and re-checked
- Gregg County Health Department (septic systems / OSSF permits) (greggcounty.texas.gov)
- Gregg County Services Overview (2026 county census)
- Unified Development Code, quoted and re-checked
- Septic Systems / Gregg County (2026 county census)
- Permitting Process, quoted and re-checked
- How to Obtain a GCHD Permit for an On-Site Sewage Facility, quoted and re-checked
- Gregg County Health Department OSSF Permit Checklist, quoted and re-checked
- Gregg County Health Department OSSF Permit Checklist, quoted and re-checked
- Local Government Code Chapter 233: County Regulation of Housing and Other Structures, quoted and re-checked
- Local Government Code Chapter 233, County Regulation of Housing and Other Structures (Texas statewide rule), quoted and re-checked
- Gregg County Judge's office (greggcounty.texas.gov)
- Texas Local Government Code, Chapter 233, quoted and re-checked
- Development Services, quoted and re-checked
- Septic Systems / Gregg County, quoted and re-checked
- Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
- Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- How to Obtain a GCHD Permit for an On-Site Sewage Facility, quoted and re-checked
- Chapter 285 – On-Site Sewage Facilities, quoted and re-checked
- Gregg County Health Department OSSF Permit Checklist, quoted and re-checked
- Farmland value per acre (USDA census): Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.