Bolthole Index

Grayson County, Texas

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

59Index Score / 100
#97 of 254 in Texas

Unincorporated Grayson County, Texas does not require a building permit for a single-family home, but a Development Certificate and a permitted OSSF (septic) system still apply123. County zoning applies in the Lake Ray Roberts and North Texas Regional Airport areas, not across the rest of unincorporated Grayson County45.

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 Code678
Zoning
Present in the Lake Ray Roberts and North Texas Regional Airport-Perrin Field areas; absent elsewhere in unincorporated Grayson County45
Septic permits
Grayson County Development Services, as a TCEQ authorized agent; required for every new or replacement system regardless of tract size910
RV septic requirement
Every residential structure and every RV in the county must be equipped with an OSSF3
Aerobic septic requirement
Required on parcels smaller than 2.5 acres3
Development Certificate
Required for construction, placement or remodel of a building; also covers 911 addresses, culverts and floodplain determinations2
RV / tiny home / manufactured home
Occupancy rules are unconfirmed outside the two county zoning areas; every RV or dwelling still needs an OSSF system3
Owner-builder
No county building permit exists to need an exemption from; you may build your own single-family home1112

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 October 10, 2026.

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

No, not for an ordinary single-family home in unincorporated Grayson County1. Grayson County does not issue Certificates of Occupancy; covered commercial, public, and larger multifamily projects instead receive a certificate of compliance after approved inspections1314. The county has adopted a fire code, not a countywide general building code, for commercial and public buildings and multifamily dwellings with four or more units in unincorporated areas8. Purely agricultural buildings with no workers present and no public access are exempt from that fire code, as are single-family homes, duplexes and triplexes15. A single-family home still needs the county's Development Certificate before construction2.

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 time162. For septic systems, contact the county's On-Site Sewage Facilities office directly; Grayson County Development Services is the county's authorized OSSF permitting agent179. For a fire-code building permit tied to a commercial, public, or multifamily project with four or more units, contact the Grayson County Fire Marshal's Office188. The published schedule charges $100 per 1,000 square feet for those buildings and $100 for the certificate of compliance; working without a permit doubles the permit fee19.

Does Grayson County have zoning?

Zoning varies within unincorporated Grayson County. County-administered zoning applies in the Lake Ray Roberts Land Use Plan and North Texas Regional Airport–Perrin Field regulation areas, while the county states that its other unincorporated areas have no zoning regulations45. Outside those designated areas, the county sets no minimum dwelling size, minimum lot size, zoning setbacks, lot-coverage limit or building-height limit through zoning2021222324. Private deed restrictions, restrictive covenants, or a homeowners' or property owners' association can still limit what you build20. Incorporated municipalities may set their own zoning, which Grayson County does not administer25. Subdividing land in unincorporated Grayson County also requires final plat approval before grading, selling lots, or starting related construction26.

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 size10. A $10 fee is collected on top of the county's own permit and inspection fees for the TCEQ Water Resources Management Account10. Aerobic treatment is required on any parcel smaller than 2.5 acres, so know your exact acreage before you plan a conventional system3. 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 Engineer27. 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 early28. To apply, contact the county's On-Site Sewage Facilities office17.

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

Grayson County's sources do not confirm a general right to occupy an RV, tiny home, manufactured home or accessory dwelling outside the two county zoning areas; ask Development Services about the parcel and proposed use16. County rule requires every residential structure and every recreational vehicle in the county's jurisdiction to be equipped with an on-site sewage facility, so an OSSF permit applies to an RV just as it would to a house3. Inside the Lake Ray Roberts Zoning District, an RV park operator needs a permit before operating, and an RV owner may not stay more than 14 days per month in a permitted RV park in the RS District29.

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

First, confirm whether your parcel is inside the Lake Ray Roberts or North Texas Regional Airport zoning area, because county zoning applies there but not throughout unincorporated Grayson County45. Second, mark your driveway entrance before applying; the Precinct Foreman determines whether a culvert is needed, and failing to mark it triggers a $100 re-inspection fee2. Third, apply online for the Development Certificate, which also processes the 911 address, culvert installation and floodplain determination162. Fourth, check the 2.5-acre aerobic-treatment threshold and apply for the OSSF permit through the county septic office173. Fifth, secure final plat approval before subdivision-related work26. A single-family home needs no county building permit or Certificate of Occupancy113.

What should you check before buying land in Grayson County?

Confirm whether the parcel falls inside the Lake Ray Roberts or airport compatibility zoning area, because county-administered land-use zoning applies in those designated parts of unincorporated Grayson County4. Check whether the land is within 100 feet of a public sewage system, since that can require connecting instead of installing new septic27. Only 7% of county soils lack severe limitations for a conventional drain field, and parcels under 2.5 acres require aerobic treatment283. Ask whether the tract carries deed restrictions or an HOA or POA obligation, since those can apply even where the county sets no zoning rule20. A new or revised driveway onto a Texas state highway requires a fully executed TxDOT driveway permit before construction begins30. The effective property-tax rate is about 1.3%, with a median annual bill around $2,953 and a typical home value around $289,706313233.

Watch-outs

  • County zoning applies in the Lake Ray Roberts and North Texas Regional Airport areas; confirm your parcel's location before relying on the different rules for the rest of unincorporated Grayson County45.
  • 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 zoning3.
  • We could not confirm a countywide short-term-rental rule for Grayson County; confirm the parcel-specific requirements with Development Services16.

Sources

  1. Grayson County Development Services, quoted and re-checked
  2. Grayson County Planning & Zoning Steps, quoted and re-checked
  3. An Order Entitled On-Site Sewage Facilities, quoted and re-checked
  4. Grayson County Development Services Zoning, quoted and re-checked
  5. Grayson County Development Services Zoning, quoted and re-checked
  6. Grayson County Development Services (2026 county census)
  7. Grayson County Development Services, quoted and re-checked
  8. Grayson County Fire Code, quoted and re-checked
  9. Grayson County TX - OSSF Permitting Requirements (2026 county census)
  10. Development Services | Grayson County Tx., quoted and re-checked
  11. Grayson County Development Services (2026 county census)
  12. Texas law on county zoning and building authority
  13. Grayson County Development Services, quoted and re-checked
  14. Grayson County Development Services, quoted and re-checked
  15. Grayson County Fire Marshal Permits, quoted and re-checked
  16. Grayson County Development Services Supervisor (co.grayson.tx.us)
  17. Grayson County On-Site Sewage Facilities (Designated Representative) (co.grayson.tx.us)
  18. Grayson County Fire Marshal's Office (co.grayson.tx.us)
  19. Grayson County Fire Marshal, 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. Grayson County Development Services Zoning, quoted and re-checked
  25. Development Services | Grayson County Tx., quoted and re-checked
  26. Grayson County Subdivision Regulations, quoted and re-checked
  27. An Order Entitled On-Site Sewage Facilities, quoted and re-checked
  28. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  29. Lake Ray Roberts Land Use Ordinance, quoted and re-checked
  30. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  31. Effective property tax rate: Bolthole Index county data
  32. Median property tax bill: Bolthole Index county data
  33. Typical home value (Zillow): Bolthole Index county data

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like 4 of its 6 neighbors, Grayson County requires no county building permit for a home.

RuleGrayson CountyCollin CountyFannin CountyCooke CountyDenton CountyHunt CountyRockwall County
Building permitNot requiredLimitedNot requiredNot requiredNot requiredNot requiredLimited
County zoningNoNoYesYesYesNoNo
Septic permitsCounty Development ServicesCounty Development ServicesCounty Env. Development Dept.County Rural Subdivision & Septic Dept.County Public HealthCounty Health Dept.County Env. Health Coordinator

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%Soils rated "not limited" for septic (strict USDA rating)
39,678 acWorkable land screen
30.1%Wooded land
24.4 tonsBiomass / forest ac
63.9°FAvg temp

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Cities and towns in Grayson 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.

Not yet researched: Dorchester · Town of Howe · Knollwood · Sadler · Southmayd · Town of Tioga · Tom Bean

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

    Construction and substantial improvements of public buildings, commercial establishments, and multifamily residential dwellings of four or more units in unincorporated Grayson County.

    • The adopted county code is a fire code rather than a countywide general building-code adoption.
    • The Fire Code applies after its effective date in the unincorporated areas of Grayson County.
    • The code's construction provisions apply only to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units.
    • An industrial facility having an OSHA-conforming fire brigade is excluded.
    • A person may not construct or substantially improve a covered building without a building permit issued under the code; the application requires a proposed-building plan and the applicable fee.
    • The fire-code official must issue or deny a complete application within 30 days; if neither occurs, the construction or substantial improvement is approved for purposes of the code.
    • Where this code and another legal requirement conflict or overlap, the more stringent restriction prevails.

    multifamily-unit threshold: >= 4 units (Only multifamily dwellings with four or more units are within the stated construction scope.) · permit decision period: <= 30 days (Runs after the fire-code official receives the application and fee; no action within that period approves the construction or substantial improvement for purposes of the code.)

    “AS ADOPTED: July 18, 2023 EFFECTIVE: September 1, 2023 [...] This code applies only to the following buildings constructed in the unincorporated area of Grayson County: a) A commercial establishment; b) A public building; and c) A multi-family residential dwelling consisting of four or more units.”
    One more reviewed finding on this topic
    • Partial — 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.
      “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 zoningPresent (with conditions)

    County-administered land-use zoning in the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation areas of unincorporated Grayson County.

    • Outside those two named areas, Grayson County states it has no zoning regulations for unincorporated Grayson County.
    • The Lake Ray Roberts ordinance excludes land within an incorporated municipality's corporate limits.
    • For Lake Ray Roberts, applicability is bounded by the lake shoreline at 645 MSL and a line 5,000 feet from and following that take line.
    • The Lake Ray Roberts ordinance requires conforming use, placement, and erection according to the district in which the land or building is located.

    Lake Ray Roberts jurisdictional distance from take line: 5000 ft (Area follows the Lake Ray Roberts take line at elevation 645 MSL; incorporated municipal land is excepted.) · Lake Ray Roberts take line elevation: 645 MSL

    “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.”
    One more reviewed finding on this topic
    • Absent — County zoning regulations in the unincorporated areas of Grayson County, except the Lake Ray Roberts Zoning District and North Texas Regional Airport Zoning Regulation.
      “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)

    Countywide aggregate of the county's officially described unincorporated-area zoning: zoning applies in the named Lake Ray Roberts and North Texas Regional Airport–Perrin Field regulation areas, but not elsewhere in unincorporated Grayson County. Incorporated municipalities are outside this county aggregate.

    • This is an aggregate geographic conclusion; it does not state that Grayson County administers municipal zoning.
    • The county source identifies only the Lake Ray Roberts Land Use Plan and the North Texas Regional Airport – Perrin Field Land Use Compatibility Zoning Regulation as exceptions to the otherwise no-zoning statement for unincorporated areas.
    • The Lake Ray Roberts ordinance excludes land within incorporated municipal corporate limits.
    “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.”
    One more reviewed finding on this topic
    • Varies (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.
      “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.”
  • 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.”
  • 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 feesPublished (with conditions)

    Fire-code construction permits, certificates of compliance, and related application or inspection activities for new construction or substantial improvements of commercial buildings, public buildings, and multifamily buildings with four or more units in unincorporated Grayson County.

    • A construction permit is required before the project can begin for the covered building types.
    • The published fee schedule includes application and inspection fees, including a $100 certificate of compliance fee and a $100 per 1,000 square feet fee for commercial, public, and multifamily buildings.
    • Automatic fire-extinguishing-system fees vary by head count; fire alarm/detection fees vary by device count.
    • The first re-inspection is no charge; the second and later re-inspections are $50.00.
    • After-hour inspector service is $75.00 per hour with a two-hour minimum.
    • Working without a permit results in double the permit fee.

    certificate of compliance fee: 100 USD · commercial/public/multifamily building fee: per 100 USD per 1000 sq. ft. of structure · first re-inspection fee: 0 USD · second and later re-inspection fee: 50 USD · after-hour inspector fee: per 75 USD/hour; 2-hour minimum · work without permit: double permit fee

    “Certificate of Compliance $100.00 Commercial/Public /Multi‐Family Building Per 1000 sq. ft. of Structure $100.00 [...] Re‐Inspections 1st Re‐Inspection No Charge /2nd and Beyond $50.00 After Hour Inspector Fee $75.00/hour 2 hour minimum [...] Working Without a Permit Double Permit Fee”
  • 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 (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 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.”
    One more reviewed finding on this topic
    • 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.”
  • 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.”
  • 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.”
    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.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Tiny homes — Tiny-home occupancy in unincorporated Grayson County outside the Lake Ray Roberts Zoning District and North Texas Regional Airport Zoning Regulation
  • Accessory dwellings — Accessory-dwelling occupancy in unincorporated Grayson County outside the Lake Ray Roberts Zoning District and North Texas Regional Airport Zoning Regulation

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.

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.

How Grayson compares in Texas

Compare side-by-side →See all 254 Texas counties ranked →