Building permits, zoning and land rules in Oldham County, Texas
35Index Score / 100 #244 of 254 in Texas
Unincorporated Oldham County, Texas does not require a general building permit for a home, and it has no county zoning ordinance12. Septic work is generally permitted and inspected under Texas rules, but we could not confirm whether TCEQ or a local authorized agent currently processes Oldham County applications34. Incorporated Vega has its own adopted building codes, so property inside the city is a different case5.
At a glance
Building permit
No general residential building permit identified for unincorporated Oldham County1
Zoning
No county zoning ordinance for unincorporated land26
Septic
A permit and approved plan are generally required; ask TCEQ to identify the current permitting authority347
RV and tiny-home occupancy
No county zoning restriction on unincorporated land; sanitation rules still apply68
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Do you need a building permit in Oldham County, Texas?
Unincorporated Oldham County does not have an identified general residential building-permit requirement1. Even where Texas counties adopt the state residential-construction framework, the law does not require prior county approval before covered construction begins11. That framework can require inspections only after a qualifying county adopts it, and we could not confirm that Oldham County has done so1213. Its owner-builder provision protects a qualifying primary-residence builder from a notice penalty; it does not waive the inspections themselves or create a general permit exemption1410. Ask the Commissioners Court about inspections, fees or occupancy documents13. Factory-built modular projects covered by the Texas industrialized-building program must follow state-adopted codes15. Inside Vega, the city’s adopted building and electrical codes apply instead5.
Who handles building and land permits in Oldham County?
Oldham County has no identified county building department or general residential permit program for unincorporated land1. For unconfirmed county inspections, occupancy documents, floodplain development, county-road access and fees, start with the Oldham County Commissioners Court13. Septic information is available from the Texas Commission on Environmental Quality OSSF Program, whose page directs permitting questions to the local-authority lookup7. We could not confirm whether TCEQ or a local authorized agent currently processes Oldham County septic applications, so verify the recipient before submitting plans47. For a new or changed driveway onto a state highway, contact the TxDOT Vega Maintenance Office and submit Form 10581617.
Does Oldham County have zoning?
Unincorporated Oldham County has no identified county zoning ordinance2. Texas county zoning authority is limited to specially authorized places and subjects rather than granted generally statewide18. As a result, county zoning sets no minimum dwelling size, minimum lot size, setback, lot-coverage limit or building-height limit on unincorporated Oldham County land6. County zoning also does not restrict accessory dwellings, RV occupancy, tiny-home occupancy, manufactured-home occupancy or temporary camping there6. Those answers do not erase septic requirements, deed restrictions, utility conditions, subdivision rules or municipal codes8195. Land inside incorporated Vega is governed differently because Vega has adopted municipal building codes5.
How do septic permits work in Oldham County?
A permit and approved plan are generally required to construct, alter, repair, extend or operate an on-site sewage facility in Oldham County3. The permitting authority reviews the application and planning materials and must approve or deny them within 30 days after receipt20. For a permitted installation, the installer must notify the authority at least five working days before the system is ready, and the authority conducts a construction inspection21. A single-family home on at least 10 acres can qualify for an exception only when every listed condition is met, including keeping all OSSF parts at least 100 feet from the property line, retaining effluent onsite and having only one dwelling on the tract3. About 53.2% of county soils avoid a “very limited” rating for a conventional drain field, so arrange the site evaluation before finalizing a house location22. Ask TCEQ’s OSSF Program to identify the current Oldham County permitting authority7.
Can you live in an RV or tiny home in Oldham County?
County zoning does not restrict RV living, tiny-home occupancy, manufactured-home occupancy or temporary camping on unincorporated Oldham County land6. County zoning also sets no minimum dwelling size or zoning setback there6. Sanitation remains the practical constraint: an OSSF generally requires approved planning, a permit and inspection unless a specific exception applies8. The acreage exception is narrow and is tied to a single-family dwelling that is the only dwelling on the tract, along with the other siting and performance conditions3. We could not confirm a county certificate-of-occupancy rule, utility-connection rule or separate RV utility policy, so ask the Commissioners Court and the septic permitting authority before treating an RV as a long-term residence137. Inside Vega, municipal rules may differ from the county answer because the city has adopted its own building codes5.
Building a home in Oldham County: the steps, in order
Confirm that the parcel is outside incorporated Vega, where municipal codes apply5.
Ask the Commissioners Court whether the parcel has any floodplain, county-road access, subdivision or residential-inspection requirement1312.
Arrange a septic site evaluation and ask TCEQ’s OSSF Program to identify the current permitting authority227.
Submit septic plans and the permit application unless the authority confirms that every condition of an exception is met3.
For state-highway access, contact the local TxDOT office, submit Form 1058, wait for the executed permit and give 24-hour notice before construction in the right-of-way2317.
Confirm whether factory-built components fall under Texas industrialized-building codes before ordering them15.
What should you check before buying land in Oldham County?
Check legal access, water, septic feasibility, flood exposure, deed restrictions and whether the parcel is inside Vega before closing53. A new or modified driveway onto a state highway requires TxDOT Form 1058, but we could not confirm a separate Oldham County rule for county-road access1613. Dividing rural land can trigger state platting rules; the agricultural, ranch, wildlife-management or timber exception applies only when its conditions are met19. Agricultural or open-space land may receive special appraisal after meeting the use and history requirements, while a change to nonagricultural use can trigger rollback tax24. Annual precipitation averages 17.6 inches and severe drought occurs in 31.7% of years, making a dependable water plan essential2526. The effective property-tax rate is about 1.3%, with a median annual bill of about $1,8782728.
Watch-outs
Oldham County’s current septic permitting authority could not be confirmed from the official lookup; ask TCEQ’s OSSF Program to identify the correct office before submitting an application47.
The no-general-building-permit answer is for unincorporated Oldham County; incorporated Vega has adopted municipal building codes15.
A new or modified driveway onto a state highway in Oldham County needs TxDOT approval, but a separate county-road access rule was not confirmed; ask the Commissioners Court about the specific road1613.
Written October 9, 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.
Oldham County highlighted among the Texas counties · colored by Index score
How Oldham County scores
Seclusion79100% ev.
Self-Sufficiency1196% ev.
Admin Boringness8790% ev.
Durability25100% ev.
Property Autonomy71100% ev.
Carry Cost8096% ev.
Evidence strength: 97%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →
$145kTypical home
1.3%Property tax
$1,053Land / acre
17.6"Annual rain
31.7% of yrsSevere drought
28.4 / yr (+23.1)Mid-century 100°F days
31.8 daysMid-century dry spell
1.21" (+1.4%)Mid-century 1-day rain
1.24×Wildfire change factor
100%Forward climate coverage
$2,548Home insurance / yr
0.3% / yrInsurance growth
0%Nonrenewal rate
single ZIP shrunk to state medianInsurance basis
789Radius comparison (15 mi)
1.2People / sq mi
0%Federal land
96.3%Land at 15% slope or less
53.2%Soils rated "not limited" for septic (strict USDA rating)
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Cities and towns in Oldham County
Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.
Adrian · Vega
Answers from the rulebook for Oldham County
What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.
Oldham County rules
Zoning districts · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Minimum dwelling size · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Minimum lot size · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Setbacks · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Lot coverage · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Building height · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Living in an RV · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Camping on your land · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Tiny homes · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Manufactured homes · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Accessory dwellings · by state lawNo county rule
Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
County-wide zoningAbsent
Texas counties generally have no zoning authority in unincorporated areas (limited exceptions by statute); no Oldham County zoning ordinance was found.
New residential construction covered by Texas Local Government Code Chapter 233, Subchapter F, in an unincorporated area of a county to which that subchapter applies.
Subchapter F applies only if the county has adopted a resolution or order requiring its application and the county is within 50 miles of an international border or has a population of more than 100.
The statute does not require prior county approval before construction begins; it imposes building-code standards and inspection/notice requirements instead.
Municipal building codes in a municipality's extraterritorial jurisdiction control if adopted there.
The subchapter covers a single-family house or duplex on a vacant lot and qualifying additions exceeding 50 percent of existing square footage or value; manufactured and modular homes described in the statute are excluded.
A county may not charge a fee to defray enforcement costs under this subchapter.
“This subchapter may not be construed to: (1) require prior approval by the county before the beginning of new residential construction;”
One more reviewed finding on this topic
Limited — Industrialized housing or buildings installed in Texas, including purchasers or lessees acquiring a unit for their own or their company’s use.
“A person who is a retailer of industrialized housing or buildings, or who is responsible for the assembly, connection, and on-site construction and erection of an industrialized house or building for persons other than themselves, must be registered as an industrialized builder. Subcontractors do not require the registration unless required by other applicable state laws. For example, electricians, HVAC contractors, and plumbers must be licensed in accordance with the applicable state law. If you are purchasing or leasing an industrialized house or building for your own use, or your company's use, you may file for an installation permit in lieu of registering as an industrialized builder.”
Owner-builder exemptionConditional
An individual building new residential construction covered by Texas Local Government Code Chapter 233, Subchapter F, who builds the residence or acts as the individual's own contractor and intends to use it as the individual's primary residence.
The exemption concerns penalties for failure to provide proper inspection notices under Sections 233.154(b) and (c); it is not an exemption from the construction inspections themselves.
The individual must build the residence or act as the individual's own contractor.
The individual must intend to use the residence as the individual's primary residence.
The statute also provides an affirmative defense when failure to submit notice resulted from the inspector's failure to provide appropriate documentation.
“An individual who fails to provide proper notice in accordance with Sections 233.154(b) and (c) is not subject to a penalty under this subsection if:”
3 more reviewed findings on this topic
Conditional — Penalty for failure to provide statutory construction-notice information under Texas Local Government Code Chapter 233, not a general exemption from a building permit.
“An individual who fails to provide proper notice in accordance with Sections 233.154(b) and (c) is not subject to a penalty under this subsection if: (1) the new residential construction is built by the individual or the individual acts as the individual's own contractor; and (2) the individual intends to use the residence as the individual's primary residence.”
Conditional — An owner performing electrical, plumbing, or air-conditioning and refrigeration work on the owner's own residence or homestead in Texas.
“A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed as electricians.”
Conditional — Electrical work on a dwelling owned and occupied by the property owner in Texas.
“A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed”
Building code adoptedPartial
Industrialized housing and buildings, modules, and modular components governed by the Texas Industrialized Housing and Buildings program.
The mandatory state code adoption applies to industrialized housing and buildings, modules, and modular components, not all construction statewide.
The effective date is July 1, 2024.
The International Existing Building Code applies to alterations of portable industrialized buildings.
Manufacturers already certified for Texas must have design-package documents reviewed and approved to the new editions with an approval date on or after July 1, 2024, unless the manufacturer elected to transition before the effective date under Department rule 70.70(a)(5)(B).
Construction begun on or after July 1, 2024 must comply with the new code editions and approved design packages.
Construction begun before July 1, 2024, or before a manufacturer's effective transition date, must meet the stated completion, inspection, and labeling deadline to remain eligible for a Texas decal.
effective date: 2024-07-01 · International Building Code: 2021 Edition (including appendices C, F, and K) · International Residential Code: 2021 Edition (including appendices AG, AH, AK, AP, AQ, and AT) · International Fuel Gas Code: 2021 Edition · International Mechanical Code: 2021 Edition · International Plumbing Code: 2021 Edition · International Energy Conservation Code: 2015 Edition · National Electrical Code: 2020 Edition · International Existing Building Code: 2021 Edition (for alterations of portable industrialized buildings)
“July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
2 more reviewed findings on this topic
Partial — Industrialized housing and buildings, modules, and modular components located in Oldham County, Texas, under the statewide Texas Industrialized Housing and Buildings program.
“Effective July 1, 2024, all industrialized housing and buildings [...] shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
Partial — Industrialized housing and buildings, modules, and modular components built for Texas under the Industrialized Housing and Buildings program.
“Effective July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
InspectionsRequired
New residential construction covered by Texas Local Government Code Chapter 233, Subchapter F.
The county must have adopted a resolution or order requiring application of Subchapter F.
For a vacant-lot house or duplex, at least three inspections are required: foundation before concrete, framing and mechanical systems before drywall or interior wall covering, and completion.
For a qualifying addition, inspections are performed as necessary based on project scope.
The builder contracts with an eligible inspector, including a licensed engineer, registered architect, TREC professional inspector, qualified municipal plumbing inspector, political-subdivision building inspector, or ICC-certified residential combination inspector.
If required by the county, the builder must submit preconstruction and final inspection notices in the county-prescribed form.
minimum inspections for new construction on vacant lot: >= 3 inspections (Qualifying additions are inspected as necessary based on scope of work)
“for new residential construction on a vacant lot, a minimum of three inspections must be performed during the construction project to ensure code compliance”
Who permits septicMixed (with conditions)
OSSF permitting, inspection, and administration throughout Texas.
TCEQ administers the program in areas where no local jurisdiction has been authorized.
A local governmental entity may administer the program only after an order, ordinance, or resolution is approved by TCEQ.
The authorized agent administers the program within its approved area of jurisdiction.
Local programs may adopt requirements more stringent than state minimums.
“The authorized agent is responsible for the proper implementation of Texas Health and Safety Code, Chapter 366, 30 TAC Chapter 285, including reviewing OSSF permit applications, conducting inspections, investigating complaints, and more.”
One more reviewed finding on this topic
Mixed — On-site sewage facilities, including septic systems, throughout Texas
“TCEQ is not often the OSSF permitting authority. [...] The TCEQ regional office will be the permitting authority in locations where a local jurisdiction has not been authorized.”
Septic permitRequired
Construction, installation, alteration, extension, repair, and operation of OSSFs in Texas, subject to stated exemptions and local requirements.
A permit and approved plan are required for construction, alteration, repair, extension, and operation of an OSSF.
A permit is generally required to construct, install, alter, extend, or repair an OSSF.
A local permitting authority must be checked because local programs may be more stringent than state minimums.
The 10-acre exemption requires compliance with 30 TAC Chapter 285 planning, construction, and installation standards; a site evaluation by a TCEQ-licensed site evaluator or professional engineer; service to a single-family dwelling on a tract of at least 10 acres; no nuisance or groundwater pollution; all OSSF parts at least 100 feet from the property line; on-site effluent disposal; and the single-family dwelling must be the only dwelling on the tract.
Emergency repairs listed by TCEQ do not require a permit but must be reported to the permitting authority in writing within 72 hours after repairs begin.
Grandfathered systems may be exempt if installed before the local program was authorized or before September 1, 1989, whichever is earlier, and if they are not creating a nuisance, are not in need of repair, and have had no significant increase in use or other alteration.
The permitting authority must approve or deny planning materials and the permit application within 30 days of receipt.
minimum tract size for 10-acre exemption: >= 10 acres (single-family dwelling and all other stated conditions must be met) · minimum OSSF setback under 10-acre exemption: >= 100 feet from property line (all parts of the OSSF) · emergency repair reporting deadline: <= 72 hours (after repairs have begun) · permit application decision deadline: <= 30 days (from receipt by permitting authority)
“A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
2 more reviewed findings on this topic
Required — Construction, installation, repair, extension, or operation of an OSSF serving property in Oldham County.
“A person shall hold a permit and an approved plan to construct, alter, repair, extend, or operate an on-site sewage facility (OSSF) unless the OSSF meets one of the exceptions in subsection (f) of this section.”
Required — Construction, installation, alteration, extension, or repair of an OSSF in Texas
“A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
Septic inspectionRequired
Construction inspection of permitted OSSFs in Oldham County.
The installer must notify the permitting authority at least five working days before the OSSF is ready for inspection.
The permitting authority must conduct a construction inspection.
If the system fails, it cannot be used until it passes inspection; a reinspection fee may be assessed and must be paid before reinspection.
No inspection is required under the stated 10-acre single-family-dwelling exemption when all listed conditions are met.
advance inspection notice: 5 working days (Monday through Friday, excluding holidays.) · reinspection fee: may be assessed (Must be paid before reinspection.)
“The installer shall notify the permitting authority at least five working days (Monday through Friday, excluding holidays) before the date the OSSF will be ready for inspection. (3) The permitting authority shall conduct a construction inspection.”
2 more reviewed findings on this topic
Limited — OSSF installation and, where applicable, maintenance inspections in Texas
“Many times, the AA has a "designated representative" (DR) to assist them with their responsibilities, which include reviewing plans for constructing, altering, extending or repairing each OSSF; issuing permits; and inspecting system installation. [...] If the system uses an electronic monitor, automatic radio or telephone to notify the maintenance provider of system or component failure and to monitor the amount of disinfection in the system, reporting may be reduced to every six months.”
Limited — OSSFs using secondary treatment or drip irrigation in Texas.
“A system using secondary treatment or drip irrigation must be inspected by a valid maintenance company once every four months, or be maintained by the single family homeowner, where allowed.”
Off-grid sanitationLimited
Off-grid wastewater sanitation through an OSSF in Texas.
An OSSF generally requires a permit and approved plan before construction, installation, alteration, extension, repair, or operation.
A qualifying single-family dwelling on a tract of at least 10 acres may use the 10-acre permitting exemption only if every stated site-evaluation, setback, nuisance, groundwater, on-site disposal, and single-dwelling condition is met.
Local permitting authorities may impose requirements more stringent than state minimums.
Emergency repairs are exempt from permitting only for the listed repair types and must be reported in writing within 72 hours after repairs begin.
10-acre exemption tract size: >= 10 acres (all TCEQ conditions must be satisfied) · 10-acre exemption OSSF setback: >= 100 feet from property line (all parts of the OSSF)
“An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
2 more reviewed findings on this topic
Limited — On-site sewage disposal used instead of a public wastewater connection in Oldham County.
“No planning materials, permit, and inspections [or inspection] are required for an OSSF for a single family dwelling located on a tract of land that is ten acres or larger provided the OSSF complies with all other requirements of Chapter 285, Subchapter D: Planning, Construction, and Installation Standards for OSSFs”
Limited — Composting toilets used as on-site sewage facility treatment systems in Texas.
“Composting toilets will be approved by the executive director provided the system has been tested and certified under NSF International Standard 41 (1999) or under any other standards approved by the executive director.”
Well permitLimited
Drilling, equipping, operating, or completing a water well, or substantially altering a well or well pump, where the well is within a groundwater conservation district in Texas.
A groundwater conservation district must require a permit except as provided by Texas Water Code §36.117.
A district may not require a permit or permit amendment for maintenance or repair that does not increase production capability above the authorized or permitted production rate.
Permit applications must be in writing and sworn.
Whether a particular private well is exempt or subject to additional district requirements depends on the applicable groundwater conservation district's rules.
permit application form: in writing and sworn
“Except as provided by Section 36.117, a district shall require a permit for the drilling, equipping, operating, or completing of wells or for substantially altering the size of wells or well pumps.”
Agricultural exemptionAvailable (with conditions)
Texas agricultural or open-space land, including qualifying land in Oldham County, seeking special agricultural appraisal.
The land must be currently devoted principally to agricultural use.
Agricultural use must meet the degree of intensity generally accepted in the area.
The land generally must have been devoted to agricultural or timber production for at least five of the past seven years.
Owners apply using the applicable Comptroller form, including Form 50-129 for 1-d-1 open-space agricultural use appraisal.
If land receiving agricultural appraisal changes to a non-agricultural use, rollback tax may be due for each of the previous three years in which the land received the lower appraisal; additional interest may apply to land qualifying under Subchapter C or 1-d.
prior agricultural or timber production: 5 of preceding 7 years (Land within an incorporated city or town has additional criteria stated by the Comptroller.) · rollback period: 3 previous years (Exceptions may apply if specified criteria are met.)
“Agricultural land must be currently devoted principally to agricultural use to the degree of intensity generally accepted in the area. The land must have been devoted to agricultural or timber production for at least five of the past seven years.”
Subdividing landRegulated (with conditions)
Subdivision platting requirements applicable to land outside municipal limits in Oldham County under Texas Local Government Code Chapter 232.
The state rule requires a subdivision plat when an owner divides a tract into two or more parts to lay out a subdivision, lots, or streets, alleys, squares, parks, or other parts intended for public use.
A county may not require a plat for a division outside municipal limits when the owner does not lay out a part intended for public use and the land is to be used primarily for agricultural use, farm, ranch, wildlife management, or timber production.
If a tract receiving the agricultural, farm, ranch, wildlife management, or timber-production exception ceases to be used primarily for those purposes, the platting requirements apply.
The cited provision does not establish an Oldham County-specific development-fee schedule, minimum lot size, road standard, water requirement, wastewater requirement, or filing fee.
“A county may not require the owner of a tract of land located outside the limits of a municipality who divides the tract into two or more parts to have a plat of the subdivision prepared if: (1) the owner does not lay out a part of the tract described by Section 232.001(a)(3); and (2) the land is to be used primarily for agricultural use, as defined by Section 1-d, Article VIII, Texas Constitution, or for farm, ranch, wildlife management, or timber production use within the meaning of Section 1-d-1, Article VIII, Texas Constitution.”
Driveway accessRequired
New or modified driveway access from property in Oldham County to a highway on the state highway system; Oldham County is within the TxDOT Amarillo District.
The applicant should contact the local District TxDOT office.
The applicant must submit Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way.
The application must include the proposed work description, applicant name, mailing address, and driveway location.
Applications must be made by the property owner or authorized representative and only to secure or change access to the owner's property, not to park or service vehicles on state highway rights of way.
No driveway construction may begin in the right of way until a fully executed permit is received and 24-hour notification is given to TxDOT.
If a local public agency has been granted access driveway permitting authority, that does not eliminate engineering requirements; drainage impacts must be coordinated with and approved by TxDOT before local approval.
The requirement applies to state-highway access; the sources do not establish a county-road driveway-permit requirement.
advance construction notice: 24 hours (notification to TxDOT before construction work in the right of way)
“No construction work on the driveway shall be undertaken on the right of way until a fully executed driveway permit has been received by the applicant and the applicant has given 24-hour notification to TxDOT.”
2 more reviewed findings on this topic
Required — New or modified driveways accessing state highways in Texas, including applicable state-highway locations in Oldham County.
“A completed Permit Form 1058 is necessary whenever new access driveways are constructed or existing access driveways are modified.”
Required — New or modified access driveways connecting property to a Texas state highway right of way.
“A driveway must be constructed in accordance with a fully executed driveway permit”
Permit processPublished (with conditions)
Constructing a new driveway or revising an existing driveway on the right of way of a Texas state highway.
The applicant should contact the local District TxDOT office.
The applicant must submit Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way.
The application must be for the bona fide purpose of securing or changing access to the owner's property, not parking or servicing vehicles on state highway rights of way.
No construction may begin on the right of way until a fully executed driveway permit is received and the applicant gives TxDOT 24-hour notification.
The driveway must comply with the executed permit and applicable regulations; TxDOT inspection must find construction satisfactory.
Where a local public agency has permitting authority, drainage impacts on the state highway system still require TxDOT approval before local approval.
Driveway geometrics, utilities, environmental requirements, wetlands considerations, ADAAG, TAS, and other applicable state and federal laws must be considered.
required form: Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way · advance notification: 24 hours (Notification to TxDOT is required before construction on the right of way.) · private residential driveway maximum width: <= 24 feet (Except as increased by permissible radii.) · minimum driveway radius to highway pavement: >= 15 feet
“The applicant shall complete and submit to TxDOT a Form 1058”
2 more reviewed findings on this topic
Published (with conditions) — On-site sewage facility permitting for property in Oldham County and elsewhere in Texas, including septic systems and holding tanks.
“Applications and planning materials must be submitted to the permitting authority. To find your permitting authority, search by the county the OSSF is to be located. The TCEQ regional office will be the permitting authority in locations where a local jurisdiction has not been authorized.”
Published (with conditions) — Driveway construction or revision on state highway right-of-way in Texas, including any applicable state-highway access in Oldham County.
“To obtain a permit to construct a driveway or to revise any existing driveway, the applicant should contact the local District TxDOT office.”
county zoning authorityLimited
Texas counties adopting zoning regulations for specified unincorporated or otherwise specially defined areas.
Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
Other Chapter 231 subchapters address special areas including the Amistad Recreation Area in Val Verde County, military zones, certain lakes, the El Paso Mission Trail Historical Area, Lake Somerville, and Falcon Lake in Zapata County.
The cited statute was enacted effective September 1, 1987; the Falcon Lake subchapter was added effective June 15, 2007, and amended effective September 1, 2009.
Padre Island distance from publicly owned park or recreational development: <= 2 miles (Area must be outside a municipality and in Cameron or Willacy County.) · Padre Island distance from beach, wharf, or bathhouse: <= 2 miles (The beach, wharf, or bathhouse must be used by at least 500 persons annually.)
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
One more reviewed finding on this topic
Limited — County zoning authority over unincorporated land in Texas, where a specific statutory grant applies.
“As you suggest, a county has very limited and specific zoning authority, and none that may be used to regulate construction or operation of the proposed facility.”
county building authorityLimited
Texas counties adopting and enforcing fire-code building permits for specified buildings in unincorporated areas and applying residential building-code standards in certain counties.
Under Section 233.061, the county must have a population over 250,000 or be adjacent to a county with a population over 250,000.
Under Section 233.062, the fire code applies only to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units constructed in an unincorporated area.
The fire code does not apply to an industrial facility having a fire brigade that conforms to Occupational Health and Safety Administration requirements.
A covered applicant must submit a plan and a commissioners-court-set application fee; the county must issue or deny the permit within 30 days, and failure to act within 30 days approves the construction for purposes of the subchapter.
The fire code must conform to the International Fire Code or Uniform Fire Code as those codes existed on May 1, 2005, or establish protective measures exceeding those standards; later editions may be adopted.
Residential standards under Section 233.152 apply only if the county adopts a resolution or order and the county is within 50 miles of an international border or has a population over 100.
Those residential standards apply only to new single-family-house or duplex construction beginning after September 1, 2009; manufactured or modular structures governed by Occupations Code Chapters 1201 or 1202 are excluded from the definition of new residential construction.
A municipality's building code controls in its extraterritorial jurisdiction, and Section 233.152 does not authorize county prior approval of new residential construction or county zoning regulations.
Fire-code inspection and permit fees may be charged under a fee schedule based on building type, limited to amounts necessary to administer and enforce the subchapter; inspection fees must be reasonable and reflect approximate inspection costs.
county population threshold for fire-code authority: > 250000 persons (A county adjacent to a county over 250,000 also qualifies.) · multifamily residential dwelling threshold: >= 4 units (The fire code applies only to covered buildings constructed in an unincorporated area.) · residential-code border distance: <= 50 miles (Alternative qualification is county population over 100.) · application decision period: 30 days (If the commissioners court does not issue or deny the permit within 30 days after receiving the application and fee, construction is approved for purposes of the subchapter.) · residential standards effective construction date: > 2009-09-01 (Applies only to new residential construction that begins after September 1, 2009.)
“The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code. [...] The fire code applies only to the following buildings constructed in an unincorporated area of the county: (1) a commercial establishment; (2) a public building; and (3) a multifamily residential dwelling consisting of four or more units.”
One more reviewed finding on this topic
Limited — County fire-code adoption and building-permit authority for specified buildings in unincorporated areas of qualifying Texas counties, including multifamily residential dwellings of four or more units.
“The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code.”
Inside cities and towns in Oldham County
Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.
Building code adoptedAdopted (with conditions)
Construction governed by the City of Vega, Texas, within the incorporated municipality.
The ordinance states that it amends the Vega City Code.
The ordinance adopted the listed 2015 International Building Codes and the 2017 National Electrical Code.
The ordinance states that it does not replace the 2012 International Building Codes and 2014 National Electrical Code, and that amendments in Section 3.03.002 remain unchanged.
The ordinance was adopted by unanimous City Council vote on February 11, 2020.
building code edition: 2015 International Building Codes (Includes International Building Code, Residential Code for One- and Two-Family Dwellings, Fire Code, Plumbing Code, Mechanical Code, Fuel Gas Code, and Energy Conservation Code) · electrical code edition: 2017 National Electrical Code (The ordinance states that this does not replace the 2014 National Electrical Code)
“The following codes are hereby adopted by reference. A copy of each code, with approved amendments, shall be kept on file in the office of the city.”
Still unanswered
We looked and could not find an official answer yet. Silence is not permission — ask the county directly.
Certificate of occupancy — Certificates of occupancy for buildings in Oldham County, including residential buildings.
Local zoning — Aggregate local zoning status across Oldham County municipalities and unincorporated areas; this claim does not assert that the county administers municipal zoning.
Mandatory utility hookup — Water or wastewater utility-connection requirements in Oldham County.
Building in a floodplain — Development in mapped flood hazard areas in Oldham County.
Short-term rentals — Short-term rental use of residential property in Oldham County.
1 more unanswered
Permit fees
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Living off-grid in Oldham County, Texas
Is Oldham County a good place to live off-grid or homestead?
Oldham County scores 35/100 on the Bolthole Index, a marginal county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: thin water margin (17.6″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.
Do you need a building permit in Oldham County, Texas?
Oldham County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Texas Commission on Environmental Quality (TCEQ), Region 1 (Amarillo). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.
Can you live in an RV or tiny home on your land in Oldham County?
Living in an RV on your own land in Oldham County is allowed: Unincorporated Oldham County: no county rule sets this, because Oldham County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing statutes.capitol.texas.gov. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters. A tiny home is allowed. Confirm with the county before relying on it.
How much does land cost in Oldham County, Texas?
Land in Oldham County runs about $1,053 per acre, based on the latest county data.
What is the water situation in Oldham County?
Oldham County gets about 17.6" of rain a year, with severe drought in roughly 31.7% of years.
How remote is Oldham County?
A typical private-land location has about 789 people within 15 miles and 422,913 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.
