Bolthole Index

Grayson County, Texas

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

59Index Score / 100
#97 of 254 in Texas

Grayson County, Texas does not issue Certificates of Occupancy or require building permits for single-family residential structures1. The county also has no zoning regulations for its unincorporated areas, with two named exceptions: the Lake Ray Roberts Zoning District and the North Texas Regional Airport-Perrin Field Land Use Compatibility Zoning Regulation2. Even without a building permit, the county still requires a Development Certificate before you construct, place or remodel a building, and every residential structure or RV needs an OSSF (septic) system with a county permit34.

At a glance

Building permit
Not required for single-family homes; required for new commercial, public, or 4+ unit multifamily buildings under the county Fire Code15
Zoning
None in unincorporated areas, except the Lake Ray Roberts Zoning District and the North Texas Regional Airport-Perrin Field area2
Septic permits
Grayson County Development Services, as a TCEQ authorized agent; required for every new or replacement system regardless of tract size67
RV septic requirement
Every residential structure and every RV in the county must be equipped with an OSSF4
Aerobic septic requirement
Required on parcels smaller than 2.5 acres4
Development Certificate
Required for construction, placement or remodel of a building; also covers 911 addresses, culverts and floodplain determinations3
RV / tiny home / manufactured home
Unrestricted by zoning outside Lake Ray Roberts and the airport zoning area, but every RV or dwelling still needs an OSSF system84
Owner-builder
No county building permit exists to need an exemption from; you may build your own single-family home910

Who to call

Planning & zoning

Grayson County Development Services Supervisor

Development Certificates for construction, placement or remodel of a building, 911 addressing, culvert and driveway applications, floodplain determinations, and platting for unincorporated Grayson County

903-813-4524

Grayson County Courthouse, 100 W. Houston, Ste. 3rd. Floor, Sherman, Texas 75090

Online permits →

Septic permits

Grayson County On-Site Sewage Facilities (Designated Representative)

OSSF (septic) permit applications, authorization to construct, and construction inspections for Grayson County, as a TCEQ authorized agent

903-813-4247

Grayson County Courthouse, 100 W. Houston, Ste. G-3, Sherman, Texas 75090

Building permits

Grayson County Fire Marshal's Office

Fire-code building permits and inspections for covered commercial, public, and larger multifamily construction in unincorporated Grayson County

903-813-4200 x 2284

100 W. Houston, Suite A-2-2, Sherman, Texas 75090

Online permits →

Contact details are copied from each office’s official page and were checked against it on September 29, 2026.

Do you need a building permit in Grayson County, Texas?

No, not for an ordinary single-family home. Grayson County does not issue Certificates of Occupancy or require building permits for single-family residential structures11. That changes for larger projects: the county's Fire Marshal's Office requires a building permit for new construction of commercial, public, or multifamily buildings of four units or larger in unincorporated areas, a requirement in effect since September 5, 2023 under the 2021 International Fire Code with local amendments512. Purely agricultural buildings with no workers present and no public access are exempt from that fire code, as are single-family homes, duplexes and triplexes13. Even for a house that needs no building permit, you'll still need the county's Development Certificate before construction, covered next3.

Who handles development and septic permits in Grayson County?

For anything you build, place or remodel, contact Grayson County Development Services, which issues the Development Certificate and coordinates 911 addressing, culverts and floodplain determinations at the same time143. For septic systems, contact the county's On-Site Sewage Facilities office directly; Grayson County Development Services is the county's authorized OSSF permitting agent156. For a building permit tied to a commercial, public, or multifamily project with four or more units, contact the Grayson County Fire Marshal's Office, which administers that separate permit and inspection process16517.

Does Grayson County have zoning?

Mostly no. Grayson County has no zoning regulations for its unincorporated areas outside two named exceptions: the Lake Ray Roberts Zoning District and the North Texas Regional Airport-Perrin Field Land Use Compatibility Zoning Regulation18. Outside those two areas, the county sets no minimum dwelling size, no minimum lot size, no setbacks, no lot-coverage limit and no building-height limit through zoning1920212223. Private deed restrictions, restrictive covenants, or a homeowners' or property owners' association can still limit what you build, even where the county itself sets no rule19. Inside city limits, it's a different picture: the City of Sherman, for example, maintains its own zoning ordinance separate from the county24. One county-level rule applies regardless of zoning: subdividing land in unincorporated Grayson County requires final plat approval before grading, selling lots, or starting related construction, with fees set annually by the Commissioners Court25.

How do septic permits work in Grayson County?

Every new or replacement septic system in Grayson County needs a permit, and the county requires an application, permit, authorization to construct, and construction inspection regardless of tract size7. A $10 fee is collected on top of the county's own permit and inspection fees for the TCEQ Water Resources Management Account7. Aerobic treatment is required on any parcel smaller than 2.5 acres, so know your exact acreage before you plan a conventional system4. If your land sits within 100 feet of a public sewage system, connecting to that system is required unless you get written approval from the County Engineer26. Soils here aren't especially forgiving: only 7% of Grayson County's land is free of severe limitations for a conventional drain field, reinforcing why a site evaluation matters early27. To apply, contact the county's On-Site Sewage Facilities office15.

Can you live in an RV or tiny home on your land in Grayson County?

Outside the Lake Ray Roberts and North Texas Regional Airport-Perrin Field zoning areas, Grayson County has no zoning restriction on RV, tiny-home, manufactured-home or accessory-dwelling living8. But that doesn't mean an RV can sit unplumbed: county rule requires every residential structure and every recreational vehicle in the county's jurisdiction to be equipped with an on-site sewage facility, which means an OSSF permit applies to an RV just as it would to a house4. Inside the Lake Ray Roberts Zoning District specifically, an RV park operator needs a permit before operating, and no RV owner may stay more than 14 days per month in a permitted RV park in the RS District, a rule that doesn't apply to RVs outside that district or outside a park28. Manufactured homes are unrestricted by county zoning outside the two named districts, but manufactured home rental communities have their own minimum infrastructure standards to follow8.

How do you build a home in Grayson County, step by step?

First, confirm whether your parcel is inside the Lake Ray Roberts Zoning District or the North Texas Regional Airport-Perrin Field area, since those are the only places county zoning actually applies18. Second, mark your driveway entrance physically before applying, since the Precinct Foreman uses that marking to determine whether a culvert is needed, and failing to mark it triggers a $100 re-inspection fee3. Third, apply online for your Development Certificate, which also processes your 911 address, culvert installation and floodplain determination together143. Fourth, if you need septic, check your acreage against the 2.5-acre aerobic-treatment threshold and apply for your OSSF permit through the county's On-Site Sewage Facilities office before building154. Fifth, if you're subdividing land, get your final plat approved by the Commissioners Court before grading, selling lots, or building anything tied to the subdivision25. Sixth, if you're building a commercial, public, or 4-or-more-unit multifamily building, get your construction permit from the Fire Marshal's Office and schedule the required inspections before occupancy517. There is no separate county building-permit review to schedule for an ordinary single-family home11.

What should you check before buying land in Grayson County?

Confirm whether the parcel falls inside the Lake Ray Roberts Zoning District or the airport compatibility zoning area, since those are the only places county-level zoning, setbacks, or land-use districts actually apply29. Check whether the land is within 100 feet of a public sewage system, since that can require connecting instead of installing new septic26. Septic soils are workable on some of the county, with 7% free of severe limitations for a conventional drain field, but plan for an aerobic system on any tract under 2.5 acres regardless of soil quality274. Terrain is favorable for building, with 99.4% of the county at 15% slope or less and 30.1% wooded3031. Ask whether the tract carries deed restrictions or an HOA/POA obligation, since those can apply even where the county itself sets no zoning rule19. A new or revised driveway onto a Texas state highway requires a fully executed TxDOT driveway permit before construction begins32. Property taxes run moderate here: an effective rate near 1.3%, a median annual bill around $2,953, against a typical home value around $289,706333435.

Watch-outs

  • Grayson County's 'no zoning' rule has two real exceptions: the Lake Ray Roberts Zoning District and the North Texas Regional Airport-Perrin Field Land Use Compatibility Zoning Regulation. Confirm your parcel isn't in either before assuming no zoning applies2.
  • Every RV in Grayson County, not just permanent homes, is required to be equipped with an on-site sewage facility; don't assume an RV is exempt from septic rules just because there's no zoning4.
  • No official source in this research establishes a countywide short-term-rental rule for Grayson County; if you're planning one, confirm directly with Development Services14.

Sources

  1. Grayson County Development Services (2026 county census)
  2. Grayson County TX - Development Services (2026 county census)
  3. Grayson County Planning & Zoning Steps, quoted and re-checked
  4. An Order Entitled On-Site Sewage Facilities, quoted and re-checked
  5. Grayson County Development Services, quoted and re-checked
  6. Grayson County TX - OSSF Permitting Requirements (2026 county census)
  7. Development Services | Grayson County Tx., quoted and re-checked
  8. Texas law on county zoning and building authority
  9. Grayson County Development Services (2026 county census)
  10. Texas law on county zoning and building authority
  11. Grayson County Development Services, quoted and re-checked
  12. Grayson County Fire Marshal, quoted and re-checked
  13. Grayson County Fire Marshal Permits, quoted and re-checked
  14. Grayson County Development Services Supervisor (co.grayson.tx.us)
  15. Grayson County On-Site Sewage Facilities (Designated Representative) (co.grayson.tx.us)
  16. Grayson County Fire Marshal's Office (co.grayson.tx.us)
  17. Grayson County Development Services, quoted and re-checked
  18. Development Services | Grayson County Tx., quoted and re-checked
  19. Grayson County Development Services Zoning, quoted and re-checked
  20. Grayson County Development Services Zoning, quoted and re-checked
  21. Grayson County Development Services Zoning, quoted and re-checked
  22. Grayson County Development Services Zoning, quoted and re-checked
  23. Grayson County Development Services Zoning, quoted and re-checked
  24. Development Services | Grayson County Tx., quoted and re-checked
  25. Grayson County Subdivision Regulations, quoted and re-checked
  26. An Order Entitled On-Site Sewage Facilities, quoted and re-checked
  27. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  28. Lake Ray Roberts Land Use Ordinance, quoted and re-checked
  29. Grayson County Development Services Zoning, quoted and re-checked
  30. Share of land at 15% slope or less: Bolthole Index county data
  31. Wooded share of land: Bolthole Index county data
  32. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  33. Effective property tax rate: Bolthole Index county data
  34. Median property tax bill: Bolthole Index county data
  35. Typical home value (Zillow): Bolthole Index county data

Written September 29, 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.

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County locator

Grayson County in Texas

59
County map
Grayson County highlighted among the Texas counties · colored by Index score

How Grayson County scores

Seclusion24100% ev.
Self-Sufficiency54100% ev.
Admin Boringness92100% ev.
Durability60100% ev.
Property Autonomy71100% ev.
Carry Cost63100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$290kTypical home
1.3%Property tax
$7,774Land / acre
41.4"Annual rain
18.7% of yrsSevere drought
35.4 / yr (+23.3)Mid-century 100°F days
22 daysMid-century dry spell
2.38" (+6.9%)Mid-century 1-day rain
1.4×Wildfire change factor
100%Forward climate coverage
$2,454Home insurance / yr
0.6% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
98,406People within 30 min
8,314,382People within 2 hr
75,871Radius comparison (15 mi)
157.5People / sq mi
3.5%Federal land
99.4%Land at 15% slope or less
7%Septic soil without severe limits
39,678 acWorkable land screen
30.1%Wooded land
24.4 tonsBiomass / forest ac
63.9°FAvg temp

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Answers from the rulebook for Grayson County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Grayson County rules

  • Building permitLimited

    New construction of commercial, public, or multifamily buildings of four units or larger in unincorporated Grayson County.

    • The Fire Marshal’s Office requires the building permit.
    • The source separately states that building permits are not required for single-family residential structures.
    • Upon completion, approved inspection(s) are required for the Fire Marshal’s Office to issue a certificate of compliance.

    multifamily unit threshold: >= 4 units

    “The Fire Marshal’s Office does require a building permit for new construction of commercial, public or multifamily buildings (four units or larger) in the unincorporated areas of the Grayson County.”
    One more reviewed finding on this topic
    • Not required — Single-family residential structures in Grayson County; the page places the statement in its county development-services context and separately identifies unincorporated-area permit requirements for other building types.
      “Grayson County does not issue Certificates of Occupancy or require building permits for single family residential structures.”
  • Owner-builder exemption · follows from the permit answerNot needed

    Unincorporated Grayson County: no county building permit is required, so there is no permit to be exempt from and you may build your own home. State licensing for electrical, plumbing and HVAC work may still apply.

    “Grayson County does not issue Certificates of Occupancy or require building permits for single family residential structures.”
  • Building code adoptedPartial

    The Grayson County Fire Code for new construction or substantial improvements of commercial buildings, public buildings, and multifamily dwellings with four or more units in the unincorporated areas of Grayson County.

    • The adopted code is the 2021 International Fire Code with local amendments.
    • Beginning September 5, 2023, covered new construction in unincorporated areas requires a construction permit before the project begins.
    • The county fire code does not apply to single-family dwellings, duplexes, or triplexes.
    • The county fire code does not apply to purely agricultural buildings where no workers are present and where the public does not enter.
    • A substantial improvement includes work exceeding 50 percent of the building's value, a change in occupancy classification, or an alteration modifying means of egress or required fire-protection systems.

    adopted code: 2021 International Fire Code with local amendments · multifamily threshold: >= 4 dwelling units · substantial improvement cost threshold: > 50 percent of building value

    “Grayson County has adopted the 2021 International Fire Code with local amendments to be known as the Grayson County Fire Code. The Grayson County Fire Code will be applied to all new construction or substantial improvements of commercial buildings, public buildings and multifamily (4 or more) dwellings. Beginning September 5, 2023, all new construction of these buildings, in the unincorporated areas of Grayson County will be required to have a construction permit before the project can begin.”
  • InspectionsRequired

    Commercial, public, or multifamily buildings of four units or larger in unincorporated Grayson County that require the Fire Marshal’s building permit.

    • The inspections must be approved before the Fire Marshal’s Office issues a certificate of compliance.

    multifamily unit threshold: >= 4 units

    “Upon completion and approved inspection(s), the Fire Marshal’s Office will issue a certificate of compliance.”
  • Certificate of occupancyNot required

    Certificates of Occupancy issued by Grayson County.

    • For certain permitted commercial, public, or multifamily buildings, the county page refers instead to a certificate of compliance after approved inspections; it does not identify that certificate as a Certificate of Occupancy.
    “Grayson County does not issue Certificates of Occupancy or require building permits for single family residential structures.”
  • County-wide zoningAbsent

    County zoning regulations in the unincorporated areas of Grayson County, except the Lake Ray Roberts Zoning District and North Texas Regional Airport Zoning Regulation.

    • The county's no-zoning statement expressly excludes the Lake Ray Roberts Zoning District and the North Texas Regional Airport Zoning Regulation.
    • Individual properties may still be subject to deed restrictions, restrictive covenants, or homeowners/property owners association obligations.
    “Grayson County does not have any zoning regulations for the unincorporated areas of the county outside of the Lake Ray Roberts Zoning District and the North Texas Regional Airport Zoning Regulation.”
  • Local zoningVaries (with conditions)

    Aggregate local zoning across Grayson County, including unincorporated county areas, incorporated municipalities, and named district-specific controls; this is an aggregate conclusion and does not mean the county administers each municipal ordinance.

    • Unincorporated county areas generally have no county zoning outside the Lake Ray Roberts Zoning District and North Texas Regional Airport Zoning Regulation.
    • The City of Sherman maintains a zoning ordinance, Chapter 14.
    • Municipal zoning rules are administered by the relevant municipality, not by Grayson County.
    “The City of Sherman's Zoning Ordinance, Chapter 14, can be found by visiting: City of Sherman, TX Zoning Ordinance (ecode360.com).”
  • Zoning districtsPartial

    Zoning districts and zoning regulations in unincorporated Grayson County

    • County zoning does not apply throughout the unincorporated area.
    • The exceptions identified by the County are the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport–Perrin Field Land Use Compatibility Zoning Regulation.
    • The County zoning page directs users to official zoning documents and boundary maps.
    • Incorporated municipalities may have separate municipal zoning rules.
    “Grayson County does not have any zoning regulations for the unincorporated areas of Grayson County outside of the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation.”
  • Minimum dwelling sizeNone

    Minimum dwelling-size zoning standards in unincorporated Grayson County areas outside the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport–Perrin Field Land Use Compatibility Zoning Regulation.

    • The county's no-zoning statement excludes the Lake Ray Roberts and North Texas Regional Airport–Perrin Field areas.
    • Private deed restrictions, restrictive covenants, and homeowners/property owners association obligations may still apply.
    “Grayson County does not have any zoning regulations for the unincorporated areas of Grayson County outside of the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation.”
  • Minimum lot sizeNone

    Minimum lot-size zoning standards in unincorporated Grayson County areas outside the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport–Perrin Field Land Use Compatibility Zoning Regulation.

    • The county's no-zoning statement excludes the Lake Ray Roberts and North Texas Regional Airport–Perrin Field areas.
    • Subdivision regulations and other non-zoning requirements may still apply.
    “Grayson County does not have any zoning regulations for the unincorporated areas of Grayson County outside of the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation.”
  • SetbacksNone

    Zoning setback standards in unincorporated Grayson County areas outside the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport–Perrin Field Land Use Compatibility Zoning Regulation.

    • The county's no-zoning statement excludes the Lake Ray Roberts and North Texas Regional Airport–Perrin Field areas.
    • Non-zoning building-line, subdivision, deed, covenant, HOA, floodplain, or other requirements may still apply.
    “Grayson County does not have any zoning regulations for the unincorporated areas of Grayson County outside of the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation.”
  • Lot coverageNone

    Zoning lot-coverage standards in unincorporated Grayson County areas outside the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport–Perrin Field Land Use Compatibility Zoning Regulation.

    • The county's no-zoning statement excludes the Lake Ray Roberts and North Texas Regional Airport–Perrin Field areas.
    “Grayson County does not have any zoning regulations for the unincorporated areas of Grayson County outside of the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation.”
  • Building heightNone

    Zoning building-height standards in unincorporated Grayson County areas outside the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport–Perrin Field Land Use Compatibility Zoning Regulation.

    • The county's no-zoning statement excludes the Lake Ray Roberts and North Texas Regional Airport–Perrin Field areas.
    • Airport-related compatibility controls may apply within the named airport zoning area.
    “Grayson County does not have any zoning regulations for the unincorporated areas of Grayson County outside of the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation.”
  • Living in an RV · by state lawNo county rule

    Unincorporated Grayson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Grayson County has no zoning ordinance. Grayson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 landLimited

    Temporary stays by recreational vehicle owners in recreational vehicle parks in the Lake Ray Roberts Zoning District

    • The stay must occur in a permitted recreational vehicle park.
    • The park must be located in the RS District.
    • A recreational vehicle park permit is required before operation.
    • A recreational vehicle owner may not stay more than 14 days per month.

    maximum stay: <= 14 days per month

    “No recreational vehicle owners shall be permitted to stay in excess of fourteen (14) days per month.”
  • Tiny homes · by state lawNo county rule

    Unincorporated Grayson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Grayson County has no zoning ordinance. Grayson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Grayson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Grayson County has no zoning ordinance. Grayson County's own reviewed answer confirms it has no county-wide zoning.

    • 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 Grayson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Grayson County has no zoning ordinance. Grayson County's own reviewed answer confirms it has no county-wide zoning.

    • 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.”
  • Septic permitRequired

    Construction of new or replacement septic systems and construction, alteration, extension, or repair of residential or commercial OSSFs in Grayson County.

    • Grayson County requires an application, permit, authorization to construct, and construction inspection regardless of tract size.
    • The county order applies except where an existing order, ordinance, or resolution regulates the area.
    • All permits must comply with adopted 30 TAC Chapters 30 and 285 rules.
    • All permit and inspection fees are payable to Grayson County; a $10 fee is also collected for each OSSF permit for the TCEQ Water Resources Management Account.

    TCEQ fee per OSSF permit: 10 USD (Collected in addition to county permit and inspection fees.)

    “On-site Sewage Facilities Permit is required for the construction of any new or replacement septic systems.”
  • Off-grid sanitationAllowed (with conditions)

    Residential structures and recreational vehicles using an on-site sewage facility instead of a public sewage system in Grayson County, subject to county OSSF rules.

    • All residential structures and recreational vehicles in the jurisdiction must be equipped with an OSSF.
    • An OSSF application, permit, authorization to construct, and construction inspection are required regardless of tract size, except for areas regulated under an existing order, ordinance, or resolution.
    • A public sewage system is required for parcels within 100 feet of one unless written County Engineer approval is obtained.
    • Aerobic treatment is required on parcels smaller than 2.5 acres.
    • Aerobic-system homeowner self-maintenance requires licensing or approved training, a signed county agreement, and compliance with inspection, testing, and reporting requirements.

    aerobic treatment threshold: < 2.5 acres · public sewer connection threshold: <= 100 feet (Written County Engineer approval.)

    “All residential structures and recreational vehicles (RVs) in the area of jurisdiction must be equipped with on-site sewage facility.”
  • Mandatory utility hookupSewer (with conditions)

    Parcels, tracts, or lots in Grayson County located within 100 feet of a public sewage system.

    • Use of the public sewage system is required within 100 feet of that system.
    • Written approval from the County Engineer is an exception to the requirement.
    • The source does not establish a countywide requirement that every parcel connect to public water or sewer.

    distance from public sewage system: <= 100 feet (Written approval from the County Engineer may allow otherwise.)

    “Use of a public sewage system is required for all parcels/tracts/lots within one hundred feet (100') of said public sewage system, unless written approval is obtained from the County Engineer.”
  • Agricultural exemptionAvailable (with conditions)

    Construction of purely agricultural buildings under the Grayson County fire-code and building-permit regime in unincorporated Grayson County.

    • The agricultural building must have no workers present.
    • The public must not enter the building.
    • The county fire code separately applies to commercial establishments, public buildings, and multifamily residential dwellings.
    • Other laws, permits, deed restrictions, floodplain requirements, or subdivision requirements may still apply.
    “The county fire code does not apply to the construction of single-family dwellings, duplexes, and triplexes, and does not apply to purely agricultural buildings where no workers are present and where the public does not enter.”
  • Subdividing landRegulated (with conditions)

    Subdivision and plat approval for land in the unincorporated portions of Grayson County.

    • No grading of streets or roads, sale of lots, or other associated construction may begin before final plat approval, except by written authorization of the Commissioners Court.
    • Plat fees are payable when the permit application is submitted; fees are set annually by the Commissioners Court and are non-refundable and non-transferable.
    • The regulations identify statutory exceptions to platting, but those exceptions do not apply if new streets or roads are constructed to provide access frontage or if access easements are provided for adjacent tract owners.
    • The Commissioners Court may refuse to approve a map or plat that does not meet the regulations.

    plat approval timing: before grading, sale of lots, or associated construction (written authorization of the Commissioners Court) · platting fees: set annually (non-refundable and non-transferable)

    “Persons subdividing land in the unincorporated portions of Grayson County shall comply with this section for plat approval. No grading of streets/roads or the sale of lots shall commence, nor shall any other associated construction be accomplished by the owner/developer upon land being subdivided prior to final plat approval, except by written authorization of the Commissioners Court.”
  • Permit processPublished (with conditions)

    Construction, placement, or remodel of a building and related addressing, culvert, and floodplain processes in unincorporated Grayson County

    • A Development Certificate is required for construction, placement, or remodel of a building.
    • Emergency-911 addresses, new culvert installations, and floodplain determinations are processed with the Development Certificate.
    • The online process requires creating an account, selecting Planning & Zoning, selecting Apply Online, choosing Development Certificate or the appropriate plat type, completing the questionnaire, and submitting it.
    • The driveway entrance must be physically marked before submitting; the Precinct Foreman determines whether a culvert is needed.
    • Failure to mark the driveway entrance results in a $100 re-inspection fee.

    driveway re-inspection fee: 100 USD

    “Grayson County does require the completion of a Development Certificate for construction, placement or remodel of a building. Emergency-911 addresses, new culvert installations and floodplain determinations are processed in conjunction with the Development Certificate.”

Texas rules that apply here

  • Who permits septicMixed

    On-site sewage facilities, including septic systems, throughout Texas

    • In most areas, local governments act as TCEQ-authorized agents and administer the OSSF program.
    • The TCEQ regional office is the permitting authority where a local jurisdiction has not been authorized.
    • Local permitting programs may be more stringent than state minimums.
    “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 inspectionLimited

    OSSF installation and, where applicable, maintenance inspections in Texas

    • Authorized agents or their designated representatives inspect system installation.
    • Some permitting authorities impose more stringent requirements.
    • Maintenance-provider inspection and reporting requirements apply to systems and circumstances governed by 30 TAC §285.91(4).
    • Electronic monitoring may reduce reporting to every six months where the stated monitoring conditions apply.

    reduced maintenance reporting interval with qualifying electronic monitoring: 6 months (only where the system uses the specified electronic monitoring, automatic notification, and disinfection monitoring)

    “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.”
  • Driveway accessRequired

    New or modified access driveways connecting property to a Texas state highway right of way.

    • A local public agency may receive access driveway permitting authority for state highways, but TxDOT approval remains required for drainage impacts on the state highway system before local approval.
    • No access driveway is permitted within a flared or widened right-of-way section at an intersection of a state highway with another highway, road, or street.
    • All entrances and exits, including radii, must be confined within the permittee's property frontage.
    • One-way 45-to-90-degree driveways are permitted for connections to one-way frontage roads or lane-divided highways; otherwise the driveway angle must be 75 to 90 degrees.
    • ADAAG and Texas Accessibility Standards apply.

    private residential driveway maximum width: <= 24 feet (Except as increased by permissible radii.) · driveway-to-pavement radius: >= 15 feet

    “A driveway must be constructed in accordance with a fully executed driveway permit”
  • 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.”
  • 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.”

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.

Water rights & wells in Grayson County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Texas’s water agency.

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

Household wellExempt up to a limit

Texas groundwater is governed by the rule of capture; a Groundwater Conservation District must exempt qualifying domestic/livestock wells and may not restrict their production, but well registration and spacing rules can still apply and the exemption does not cover wells serving a platted subdivision.

Limit: Domestic/livestock well exempt from GCD production permitting if on a tract >10 acres AND incapable of producing >25,000 gal/day (Tex. Water Code §36.117)

Texas Water Code §36.117 / TWDB ↗
  • North-Central Texas Trinity & Woodbine Aquifers Priority Groundwater Management Areapartial of county

    TCEQ-designated DFW-region Trinity/Woodbine critical-groundwater area; drives GCD coverage. Domestic/livestock wells remain exempt but spacing/registration may apply.

    TCEQ — Priority Groundwater Management Areas ↗

Hybrid state (appropriation + riparian). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Texas state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Grayson County, Texas

Is Grayson County a good place to live off-grid or homestead?

Grayson County scores 59/100 on the Bolthole Index, a solid county profile. Its strengths: low administrative friction for a quiet rural property and a stronger property-autonomy legal backdrop. Watch-outs: about 98,406 people within a 30-minute drive.

Do you need a building permit in Grayson County, Texas?

Grayson 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 Grayson County Development Services (OSSF program, authorized agent of TCEQ). 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 Grayson County?

Living in an RV on your own land in Grayson County is allowed: Unincorporated Grayson County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Grayson County has no zoning ordinance. Grayson County's own reviewed answer confirms it has no county-wide zoning. 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 Grayson County, Texas?

Land in Grayson County runs about $7,774 per acre, based on the latest county data.

What is the water situation in Grayson County?

Grayson County gets about 41.4" of rain a year, with severe drought in roughly 18.7% of years. On water rights, Grayson County lies in the North-Central Texas Trinity & Woodbine Aquifers Priority Groundwater Management Area — TCEQ-designated DFW-region Trinity/Woodbine critical-groundwater area; drives GCD coverage. Domestic/livestock wells remain exempt but spacing/registration may apply..

How remote is Grayson County?

A representative private-land location has about 98,406 people within a 30-minute drive and 8,314,382 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Off-grid gear

Going off-grid in Grayson County means bringing your own water and power. The kit we’d start with:

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How Grayson compares in Texas

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