Unincorporated Potter County, Texas has no building department and does not require a general building permit, because Texas counties lack general authority to require one outside a handful of narrow exceptions12. Zoning works the same way: the county itself has no zoning ordinance, and zoning applies only inside the City of Amarillo, whose limits and one-mile extraterritorial jurisdiction sit inside Potter County34. Septic is different — every on-site sewage facility in the county needs a permit from the Amarillo Area Public Health District's Environmental Health Department, acting as TCEQ's designated permitting authority for Potter County5.
At a glance
- Building permit
- Not required in unincorporated Potter County; required inside Amarillo city limits and its one-mile ETJ16
- Zoning
- None in unincorporated Potter County; only the City of Amarillo has zoning34
- Septic permits
- Amarillo Area Public Health District (AAPHD) Environmental Health Department, TCEQ's designated authority for Potter County; $800 residential / $900 commercial57
- RV / tiny home / manufactured home living
- Unrestricted under county rules outside Amarillo, since the county has no zoning authority to regulate it8
- Minimum home size / lot coverage / height
- None set by the county outside Amarillo8
- Septic minimum lot size
- 1 acre with a private well, or 1/2 acre with public water supply (exceptions may apply to lots platted before 1988)9
- Subdivision plat
- Required before conveying subdivided land outside city limits, approved by the Potter County Commissioners Court10
- Septic soil difficulty
- 43.7% of county soils are free of severe limits for a conventional drain field11
Who to call
Septic permits
Amarillo Area Public Health District (AAPHD), Environmental Health Department
OSSF (septic) permit applications, fees, inspections, and 9-1-1 address requests tied to septic permits for Potter County
808 S Buchanan St, Suite 275, Amarillo, TX 79101
Building permits
City of Amarillo Building Safety Department
Building, electrical, mechanical, and plumbing permits and inspections inside the City of Amarillo, including the Amarillo portion of Potter County; has no authority over unincorporated land outside city limits and the one-mile ETJ
808 S Buchanan St, Amarillo, TX 79101
Planning & zoning
Potter County Commissioners Court (County Judge's Office)
Approves subdivision plats for land divided outside incorporated city limits, sets the county's subdivision regulations, and administers county government generally; Potter County has no separate zoning or building department
Potter County Courthouse, 500 S. Fillmore, Amarillo, TX 79101
Roads & driveways
County road maintenance and construction-related questions for driveways and culverts touching county roads
2419 Willow Creek, Amarillo, TX 79107
Contact details are copied from each office’s official page and were checked against it on September 23, 2026.
Do you need a building permit in Potter County, Texas?
No. Unincorporated Potter County has no building department, and Texas law does not give counties general authority to require residential building permits1. State law grants that power only in narrow situations, such as fire-code permits for counties over 250,000 people or adjacent to one, covering commercial buildings, public buildings, and multifamily housing of four or more units, and separate residential standards a county can adopt by resolution near an international border or above a small population floor2. Potter County's population is about 114,647, well under the 250,000-person threshold for the fire-code option, and no source reviewed here shows the county has adopted either provision122. Cross into the City of Amarillo, though, and the rule flips: most construction there requires a permit under the city's adoption of the 2021 International Residential Code with local amendments613. Amarillo's limits and its one-mile extraterritorial jurisdiction both sit inside Potter County, so always confirm whether a parcel is inside that boundary before assuming the county's no-permit rule applies14.
Who handles permits in Potter County, and how do you reach them?
There is no county building official to call for land outside Amarillo, because Potter County runs no building-permit or zoning program13. Inside Amarillo city limits or its one-mile ETJ, the City of Amarillo Building Safety Department issues permits and runs inspections, at 808 S Buchanan St, Amarillo, TX 79101, phone 806-378-304114. Septic is handled separately from either government: the Amarillo Area Public Health District's Environmental Health Department, at 808 S Buchanan St, Suite 275, Amarillo, TX 79101, phone 806-378-9472, is the TCEQ-designated permitting authority for OSSFs across all of Potter County, inside or outside city limits15. For subdivision plats outside the city, the office to know is the Commissioners Court at the Potter County Courthouse in downtown Amarillo, phone (806) 379-224616. For county road matters, contact Road & Bridge at 2419 Willow Creek, Amarillo, TX 79107, phone (806) 383-227317.
Does Potter County have zoning?
No, not outside the City of Amarillo. Texas gives counties zoning power only for a short list of specific places — Padre Island beaches in Cameron or Willacy County, the Amistad Recreation Area, certain military zones, a handful of named lakes — and Potter County isn't on that list, so unincorporated Potter County has no zoning ordinance of its own318. Inside Amarillo, it's the opposite: the city's Planning Department administers zoning districts, land-use categories, building setbacks, and parking requirements under its own ordinances4. Because Potter County has no zoning authority outside Amarillo, there's no county rule setting minimum dwelling size, minimum lot size, lot coverage, building height, or zoning districts — and that same lack of authority means RVs, tiny homes, manufactured homes, accessory dwellings, and temporary camping are all unrestricted under county rules on unincorporated land8. That doesn't mean unincorporated land is rule-free, though: Potter County's Subdivision Regulations still apply to any tract divided outside city limits, requiring Commissioners Court approval of the plat, a 30-foot structure setback on lots bordered by intersecting roads, and a drainage plan that identifies 100-year floodplain areas before the subdivision can be recorded101920.
How do septic permits work in Potter County?
Every OSSF (on-site sewage facility) installation, repair, replacement, or alteration in Potter County needs a permit from the Amarillo Area Public Health District's Environmental Health Department, which holds that authority for the county by county order as a TCEQ designated representative219. Lot size matters for eligibility: AAPHD requires a minimum 1-acre lot for a system on a property with a private water well, or 1/2 acre if the property is on a public water supply, with exceptions possible for lots platted before 19889. Homeowners can install or repair the OSSF serving their own single-family home themselves, submitting the application and required documents to AAPHD, but rental, leased, or commercial properties must use a licensed installer9. Fees run $800 for a residential system and $900 for commercial, effective September 1, 2025, plus a half-price fee to inspect an existing system7. Soils here are more forgiving than in much of Texas: 43.7% of Potter County's land is free of severe limitations for a conventional drain field, though that still leaves a majority of the county needing a closer look before design11. Texas's separate statewide 10-acre exemption can remove the permit requirement entirely, but only if a licensed site evaluator signs off, the dwelling is the only one on the tract, every part of the system stays at least 100 feet from the property line, and effluent stays on the property22.
Can you live in an RV or tiny home on your land in Potter County?
Unincorporated Potter County has no zoning ordinance restricting how you occupy your own land, so RVs, tiny homes, manufactured homes, and accessory dwellings are all unrestricted under county rules, and there's no county-set minimum home size or minimum lot size to meet8. That's a real advantage over Amarillo itself, where the city's zoning and permit rules apply to any structure, occupied or not4. If your land sits inside Amarillo's city limits or its one-mile ETJ instead, none of this county-level freedom applies, and you'd need to work through the city's own zoning and building rules14. Wherever the parcel sits, keep in mind that any septic system serving the RV, tiny home, or manufactured home still needs its own OSSF permit from AAPHD before it can be used9.
Building a home in Potter County: the steps, in order
First, confirm whether your parcel is inside Amarillo's city limits or one-mile ETJ, since that determines whether any building permit or zoning rule applies at all144. Second, if the land is outside the city and was recently divided from a larger tract, confirm the division went through Potter County's subdivision-plat process with Commissioners Court approval before you buy, since unrecorded, unapproved subdivided land can't be legally conveyed1610. Third, order a septic site evaluation early; even with 43.7% of the county's soils rated free of severe limitations, the design still has to be approved before AAPHD will issue a permit11. Fourth, apply for your OSSF permit through AAPHD before installing the system, paying $800 for a residential system unless your tract qualifies for the state's 10-acre exemption15722. Fifth, if your parcel is on a lot bordered by intersecting roads within a platted subdivision, keep any structure at least 30 feet back from the road-line convergence19. Sixth, if your driveway will connect to a state highway rather than a county road, apply to the TxDOT district office using Form 1058 and give TxDOT 24-hour notice before construction begins23. Finally, outside Amarillo, there's no county building-permit review or inspection to schedule for an ordinary single-family home1.
What to check before you buy land in Potter County
Water is the headline risk here: severe drought hit roughly 40.2% of years, and annual precipitation runs only about 18.7 inches, so a reliable well or water-supply plan deserves real budget before you commit2425. Septic soils are workable in less than half the county — 43.7% is free of severe limitations for a conventional drain field — so get a site evaluation before you count on a standard system11. The land itself is mostly gentle and open: 92.5% sits at 15% slope or less, with only 2.5% forested, so grading is rarely the obstacle2627. Confirm whether the tract sits inside Amarillo's city limits or one-mile ETJ, since that single fact determines whether any building permit or zoning rule applies to it at all4. If the land was recently split off a larger parcel outside the city, confirm the split went through Potter County's subdivision-plat process, which also requires a drainage study identifying 100-year floodplain areas before recording1020. Typical property tax runs about 1.5% effectively, with a median bill near $2,028 a year against a typical home value around $153,014282930.
Watch-outs
- Whether a parcel sits inside the City of Amarillo's limits or its one-mile ETJ changes every answer on this page — building permits, zoning, setbacks — so confirm that boundary before relying on the unincorporated-county rules described here4.
- No official source confirms whether Potter County requires a certificate of occupancy, building inspection, or owner-builder exemption for unincorporated land, since the county runs no building-permit program to attach those rules to; treat these as open questions, not confirmed absences1.
- Potter County's subdivision regulations still apply to unincorporated land even though the county has no zoning — a 30-foot road-intersection setback and a required drainage/floodplain study for any new subdivision plat are real county rules, not zoning1920.
Sources
- Texas Local Government Code Chapter 232 - County Regulation of Subdivisions (2026 county census)
- Local Government Code Chapter 233, County Regulation of Housing and Other Structures (Texas statewide rule), quoted and re-checked
- Texas Local Government Code Chapter 232 - County Regulation of Subdivisions (2026 county census)
- Codes & Ordinances - City of Amarillo, quoted and re-checked
- Amarillo Area Public Health District - On-Site Sewage Facility (2026 county census)
- Work Exempt – From Permit, quoted and re-checked
- Fee Schedule, quoted and re-checked
- Texas law on county zoning and building authority
- On-Site Sewage Facility, quoted and re-checked
- Potter County Subdivision Regulations, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- County population: Bolthole Index county data
- Residential Code Information, quoted and re-checked
- City of Amarillo Building Safety Department (amarillo.gov)
- Amarillo Area Public Health District (AAPHD), Environmental Health Department (amarillo.gov)
- Potter County Commissioners Court (County Judge's Office) (co.potter.tx.us)
- Potter County Road & Bridge (co.potter.tx.us)
- Local Government Code Chapter 231, County Zoning Authority (Texas statewide rule), quoted and re-checked
- Potter County Subdivision Regulations, quoted and re-checked
- Potter County Subdivision Regulations, quoted and re-checked
- On-Site Sewage Facility, quoted and re-checked
- Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
- Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
- Share of years in severe drought: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
Written September 23, 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.