Bolthole Index

Custer County, Oklahoma

Building permits, zoning and land rules in Custer County, Oklahoma

52Index Score / 100
#49 of 77 in Oklahoma

Unincorporated Custer County, Oklahoma does not require a county building permit for ordinary construction, but work in a county right-of-way and development in a special flood hazard area require separate county permits12. The county has no zoning, while Oklahoma DEQ issues septic authorizations34. City ordinances still control inside incorporated municipalities3.

At a glance

Building permit
Not required for ordinary construction in unincorporated areas; right-of-way and floodplain permits are separate12
Zoning
No county zoning in unincorporated Custer County; city ordinances may apply inside municipalities3
Septic
Authorization to Construct required from Oklahoma DEQ before installation or modification5
RV and temporary camping
No county zoning restriction in unincorporated areas; septic, health and floodplain rules may still apply67
Tiny home
No county zoning restriction in unincorporated areas; other applicable rules remain8
Minimum home size
No county zoning minimum in unincorporated Custer County9
Domestic well
No state water permit for qualifying domestic groundwater use10

Who to call

Building permits

Custer County Clerk and Board of County Commissioners

County ingress and egress permits; the Commissioner’s Office also holds special-flood-hazard-area development permit information

580.323.4420

martha.stanford@custercountyok.gov

PO Box 300, 675 W. B Street Arapaho, OK 73620

Septic permits

Oklahoma Department of Environmental Quality - Environmental Complaints & Local Services

On-site sewage reports, soil evaluation, Authorization to Construct review and septic installation inspection

405-702-6100

707 N Robinson Oklahoma City, OK, 73102

Online permits →

Also useful

Oklahoma State Fire Marshal - unincorporated home permit exemption

Confirms the State Fire Marshal permit exemption for specified residential and accessory structures in unincorporated county areas

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Off-grid gear

Going off-grid in Custer 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 Custer County, Oklahoma?

No county building permit is required for ordinary construction in unincorporated Custer County1. A single-family dwelling, duplex, barn, shed or attached carport in an unincorporated county area also does not require the Oklahoma State Fire Marshal permit that can apply to other projects11. Two county approvals remain important: an encroachment on or into a county right-of-way requires a permit and applicable fees, and a project in a special flood hazard area requires a development permit12. Oklahoma's statewide minimum building codes apply to residential construction in the state, and in unincorporated areas the Construction Industries Board enforces the electrical, mechanical, plumbing and fuel-gas codes, so trade work can still carry state licensing and permit rules even without a county building permit12. Custer County has not confirmed whether it has adopted a building code, requires construction inspections or issues certificates of occupancy, so ask the County Clerk and the relevant commissioner before finalizing plans. Inside a city or town, municipal ordinances may produce a different answer3.

Who handles Custer County permits, and how do you reach them?

Custer County directs ingress and egress permit questions to the County Clerk, reachable at 580.323.4420 or at PO Box 300, 675 W. B Street, Arapaho, OK 7362013. The county’s forms page provides an ingress and egress permit and a floodplain permit application13. For a project in a special flood hazard area, the County Commissioner’s Office at the Arapaho courthouse holds the development-permit information2. Oklahoma DEQ, rather than the county, handles septic authorization and assigns an application to the local environmental specialist based on the property location514. A driveway connecting to a federal or state highway requires an approved Oklahoma Department of Transportation Driveway Agreement before work begins in the highway right-of-way15.

Does Custer County have zoning?

Unincorporated Custer County has no county zoning ordinance, and the county’s statement expressly leaves state statutes and city ordinances in place3. As a result, county zoning does not set a minimum dwelling size, minimum lot size, setbacks, lot coverage or building height on land outside incorporated municipalities916171819. The same county zoning baseline does not restrict tiny-home occupancy, accessory dwellings or manufactured-home occupancy in unincorporated areas, but septic, floodplain, health and state installation rules can still control a project82021. An occupied manufactured home is treated as a permanent installation under Oklahoma rules and must follow the applicable approved installation standard22. For newly platted residential development outside municipal limits, state plat rules can require agency approval for smaller lots even though Custer County has no zoning minimum23.

How do septic permits work in Custer County?

Oklahoma DEQ issues the septic approval for Custer County: before a new system is installed or an existing system is modified, an Authorization to Construct must be purchased and issued514. DEQ first reviews the on-site sewage report, then assigns the authorization to the local environmental specialist based on the property location, and the installation must be inspected and approved before operation unless a certified installer follows the state’s self-inspection route, in which case the installer's inspection report goes to DEQ within 15 days of completion2414. Since November 1, 2025, an installer who is not DEQ-certified may install only one on-site sewage system per calendar year, which matters if you plan to install your own25. Only 18.8% of Custer County soils are rated without severe limitations for a conventional drain field, so do not assume a standard lateral field will fit a parcel before soil evaluation26. Contact Environmental Complaints & Local Services at 405-702-6100 for the specialist covering the property14. A qualifying domestic groundwater well does not need a state water permit, while a non-domestic well needs OWRB authorization and approval before drilling1027.

Can you live in an RV or tiny home in Custer County?

County zoning does not restrict RV occupancy, temporary camping or tiny-home occupancy on land in unincorporated Custer County678. That answer is limited to county zoning: septic, public-health, floodplain and other property-specific rules can still apply, and city ordinances govern land inside incorporated municipalities673. A tiny home has no county zoning minimum dwelling size in unincorporated Custer County, but the county has not confirmed a building code, inspection requirement or certificate-of-occupancy process9. Ask the County Clerk about those unresolved construction questions and contact DEQ before installing or changing any on-site sewage system135. An occupied manufactured home must comply with Oklahoma’s permanent-installation requirements even though county zoning does not bar the use2221.

Building a home in Custer County: the steps, in order

  1. Confirm that the parcel is outside an incorporated municipality; city ordinances can apply inside city limits even though unincorporated Custer County has no zoning3.
  1. Ask the County Clerk whether the site touches a county right-of-way or special flood hazard area, because those conditions trigger separate county permits12.
  1. Arrange the DEQ on-site sewage report and obtain an Authorization to Construct before installing or modifying septic514.
  1. If access connects to a federal or state highway, obtain the ODOT Driveway Agreement before right-of-way work begins15.
  1. Confirm water: qualifying domestic groundwater use needs no state water permit, but non-domestic drilling requires prior OWRB authorization1027.
  1. Ask the County Clerk about building-code, inspection and occupancy questions that Custer County has not confirmed.

What should you check before buying land in Custer County?

Check legal access, flood status, septic feasibility and water before closing. County right-of-way encroachments require a permit, and projects in a special flood hazard area require a development permit12. With only 18.8% of county soils rated without severe conventional-drain-field limitations, a soil evaluation can materially change the usable building area and system choice26. Custer County averages 28.6 inches of annual precipitation and experiences severe drought in 38.7% of years, so verify actual well records and water reliability for the parcel2829. About 98.3% of county land is at a slope of 15% or less, but parcel-level drainage and flood conditions still matter30. For budgeting, the effective property-tax rate is about 0.7%, and the median annual property-tax bill is $1,1973132.

Watch-outs

  • Custer County has not confirmed a building-code adoption, inspection requirement, certificate-of-occupancy process or owner-builder exemption for unincorporated land; ask the County Clerk before construction3313.
  • No county zoning does not waive the separate right-of-way, floodplain or septic approvals that may apply to a rural project125.
  • The county has not published the amount of its right-of-way permit fee in the reviewed material, so request the current fee from the County Clerk113.

Sources

  1. Custer County Zoning Regulations, quoted and re-checked
  2. Custer County Zoning Regulations, quoted and re-checked
  3. Custer County Zoning Regulations, quoted and re-checked
  4. Oklahoma DEQ On-Site Sewage Treatment (2026 county census)
  5. On-Site Sewage Information, quoted and re-checked
  6. Custer County Zoning Regulations, quoted and re-checked
  7. Custer County Zoning Regulations, quoted and re-checked
  8. Custer County Zoning Regulations, quoted and re-checked
  9. Custer County Zoning Regulations, quoted and re-checked
  10. Apply for a Water Permit, quoted and re-checked
  11. Oklahoma State Fire Marshal - unincorporated home permit exemption (oklahoma.gov)
  12. Adopted Building Codes (Oklahoma statewide rule), quoted and re-checked
  13. Custer County Clerk and Board of County Commissioners (custer.okcounties.org)
  14. Oklahoma Department of Environmental Quality - Environmental Complaints & Local Services (oklahoma.gov)
  15. Instructions for Driveway Permit Application (Oklahoma statewide rule), quoted and re-checked
  16. Custer County Zoning Regulations, quoted and re-checked
  17. Custer County Zoning Regulations, quoted and re-checked
  18. Custer County Zoning Regulations, quoted and re-checked
  19. Custer County Zoning Regulations, quoted and re-checked
  20. Custer County Zoning Regulations, quoted and re-checked
  21. Custer County Zoning Regulations, quoted and re-checked
  22. Title 765 Oklahoma Used Motor Vehicle and Parts Commission Rules and Regulations (Oklahoma statewide rule), quoted and re-checked
  23. Oklahoma Statutes, Title 27A — Environment and Natural Resources (Oklahoma statewide rule), quoted and re-checked
  24. On-Site Sewage Treatment, quoted and re-checked
  25. On-Site Sewage Treatment, quoted and re-checked
  26. 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
  27. Wells & Licensing, quoted and re-checked
  28. Annual precipitation: Bolthole Index county data
  29. Share of years in severe drought: Bolthole Index county data
  30. Share of land at 15% slope or less: Bolthole Index county data
  31. Effective property tax rate: Bolthole Index county data
  32. Median property tax bill: Bolthole Index county data
  33. Notice of Required Registration & Endorsement — Roofing Contractor Registration Act (2026 county census)

Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Unlike 5 of its 6 neighbors, Custer County requires a building permit only in limited cases.

RuleCuster CountyDewey CountyWashita CountyRoger Mills CountyBlaine CountyBeckham CountyWoodward County
Building permitLimitedNot requiredLimitedNot requiredNot requiredRequiredNot required
County zoningNoNoNot publishedNot publishedNoYesNo
Septic permitsOK DEQOK DEQOK DEQOK Dept. of Env. QualityOK DEQOK DEQOK Dept. of Env. Quality

County locator

Custer County in Oklahoma

52
County map
Custer County highlighted among the Oklahoma counties · colored by Index score

How Custer County scores

Seclusion7880% ev.
Self-Sufficiency2298% ev.
Admin Boringness7090% ev.
Durability39100% ev.
Property Autonomy69100% ev.
Carry Cost85100% ev.

Evidence strength: 93%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$183kTypical home
0.7%Property tax
$1,869Land / acre
28.6"Annual rain
38.7% of yrsSevere drought
43.6 / yr (+25.5)Mid-century 100°F days
27.3 daysMid-century dry spell
2" (+4.1%)Mid-century 1-day rain
1.38×Wildfire change factor
100%Forward climate coverage
$2,874Home insurance / yr
0% / yrInsurance growth
0.81%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
2,038People within 30 min
986,886People within 2 hr
14,217Radius comparison (15 mi)
28.6People / sq mi
0%Federal land
98.3%Land at 15% slope or less
18.8%Soils rated "not limited" for septic (strict USDA rating)
117,533 acWorkable land screen
5.7%Wooded land
14.6 tonsBiomass / forest ac
59.8°FAvg temp

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Cities and towns in Custer 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: Town of Butler · Town of Custer City · Thomas

Answers from the rulebook for Custer County

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

Custer County rules

  • Building permitLimited

    Construction in unincorporated Custer County.

    • No county building permit is required in unincorporated areas.
    • A permit is required for encroachments to or on county rights-of-way.
    • Development permits are required in special flood hazard areas.
    • Applicable fees are necessary for right-of-way encroachment permits.
    “There are also no building permits required in unincorporated areas of Custer County. However, please keep in mind that a permit is required for any encroachments to or on county right-of-ways and payment of applicable fees will be necessary.”
  • County-wide zoningAbsent (with conditions)

    County zoning in unincorporated Custer County.

    • The county letter excepts regulations governed by Oklahoma statutes and city ordinances.
    • This claim does not establish rules inside incorporated municipalities.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Zoning districtsNot published

    County zoning districts in unincorporated Custer County.

    • The county statement excepts requirements governed by Oklahoma state statutes or city ordinances.
    • The statement does not address zoning regulations administered by incorporated municipalities.
    • State statutes and city ordinances may still govern applicable property.
    • Separately, county right-of-way encroachment permits are required and applicable fees are necessary.
    • Development permits are required for projects in a special flood hazard area.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Minimum dwelling sizeNone (with conditions)

    County zoning minimum-dwelling-size rules in unincorporated Custer County.

    • No county zoning rule is stated; state statutes and city ordinances are excepted.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Minimum lot sizeNone (with conditions)

    County zoning minimum-lot-size rules in unincorporated Custer County.

    • No county zoning rule is stated; state statutes and city ordinances are excepted.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • SetbacksNone (with conditions)

    County zoning setback rules in unincorporated Custer County.

    • No county zoning rule is stated; state statutes and city ordinances are excepted.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Lot coverageNone (with conditions)

    County zoning lot-coverage rules in unincorporated Custer County.

    • No county zoning rule is stated; state statutes and city ordinances are excepted.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Building heightNone (with conditions)

    County zoning building-height rules in unincorporated Custer County.

    • No county zoning rule is stated; state statutes and city ordinances are excepted.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Living in an RVUnrestricted (with conditions)

    County zoning restrictions on RV occupancy in unincorporated Custer County.

    • The county letter excepts state statutes and city ordinances.
    • This finding does not establish that RV occupancy satisfies septic, health, floodplain, or other applicable rules.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Camping on your landUnrestricted (with conditions)

    County zoning restrictions on temporary camping in unincorporated Custer County.

    • The county letter excepts state statutes and city ordinances.
    • Other public-health, septic, floodplain, or property-specific rules may apply.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Tiny homesUnrestricted (with conditions)

    County zoning restrictions on tiny-home occupancy in unincorporated Custer County.

    • The county letter excepts state statutes and city ordinances.
    • Building, septic, floodplain, and health requirements are not resolved by this county zoning statement.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Manufactured homesUnrestricted (with conditions)

    County zoning restrictions on manufactured-home occupancy in unincorporated Custer County.

    • The county letter excepts state statutes and city ordinances.
    • This does not determine state manufactured-home, septic, or floodplain compliance.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Accessory dwellingsUnrestricted (with conditions)

    County zoning restrictions on accessory dwellings in unincorporated Custer County.

    • The county letter excepts state statutes and city ordinances.
    • Building, septic, floodplain, and health rules may still apply.
    “This letter is to certify that Custer County DOES NOT have any zoning or fire safety and health regulations, except any governed by State Statutes or any city ordinance in Custer County, Oklahoma.”
  • Building in a floodplainRequired

    Projects located within a special flood hazard area in unincorporated Custer County.

    • The source identifies the requirement as a development permit.
    • The county commissioner’s office holds the relevant information.
    “Also, Development Permits are required if your project is located within a special flood hazard area. This information is available in the Custer County Commissioner’s Office in the Courthouse at Arapaho, Oklahoma.”

Oklahoma rules that apply here

  • Owner-builder exemptionConditional

    Owners, certain lessees, and family or employees performing roofing work on qualifying residential, farm, commercial, or single-family dwelling property in Oklahoma.

    • An actual owner of residential or farm property may physically perform roofing services or have family or employees perform them on property owned by the person.
    • Owners of commercial properties, including residential rental properties consisting of four dwelling units or less, must act as their own roofing contractor, provide all material supervision themselves, and install roofing materials according to the IBC as adopted by the OUBCC or the manufacturer's installation instructions.
    • A lessee of residential property must have the owner's consent and must perform the roofing work personally or with the lessee's own employees, using materials installed according to the IBC as adopted by the OUBCC or the manufacturer's installation instructions.
    • An owner building or improving a single-family dwelling residence for the owner's occupancy and not intended for sale or rent must act as the owner's own roofing contractor, provide all material supervision, and install materials according to the IRC or IBC as adopted by the OUBCC or the manufacturer's installation instructions.
    • A person working on the person's own property or that of an immediate relative without compensation is listed as exempt.
    • Non-exempt roofing contractors must register annually with the CIB; the source states that the application requires the required fee and documentation but does not state an amount.
    • This source concerns state roofing registration and does not establish that local building permits or inspections are waived.

    residential rental property size: <= 4 dwelling units (The exemption is stated for residential rental properties consisting of four dwelling units or less.)

    “An actual owner of residential or farm property who physically performs, or has family or employees perform roofing services on property owned by such person;”
    5 more reviewed findings on this topic
    • Conditional — An individual performing electrical work on the individual's own property or residence in Custer County, including unincorporated areas, under Oklahoma's statewide Electrical License Act.
      “An individual to hold a license before doing electrical work on his own property or residence except as may be required by local ordinances and resolutions.”
    • Available (with conditions) — An individual performing electrical work on the individual's own property or residence in Oklahoma.
      “3. An individual to hold a license before doing electrical work on his own property or residence except as may be required by local ordinances and resolutions.”
    • Conditional — A property owner of record or authorized representative performing minor mechanical repairs in Oklahoma.
      “1. A person who is the property owner of record, or his or her authorized representative, when performing minor repair which shall include, but not be limited to, cleaning, adjusting, calibrating and repair of mechanical system parts and the replacement of fuses and room thermostats, and other minor repairs which shall not include any repair which could violate the safe operation of the equipment;”
    • Conditional — An individual performing electrical work on the individual's own property or residence under the Oklahoma Electrical License Act.
      “hold a license before doing electrical work on his own property or residence except as may be required by local ordinances and resolutions.”
    • Available (with conditions) — An individual performing plumbing work on the individual's property of residence in Oklahoma.
      “The provisions of The Plumbing License Law of 1955 shall not apply to: [...] 6. An individual who performs plumbing work on such individual’s property of residence.”
  • Building code adoptedAdopted

    Commercial building construction throughout Oklahoma, subject to the OUBCC amendments and lawful requirements of other jurisdictions.

    • The adopted code is the 2024 International Building Code as amended and modified by OUBCC rules.
    • The 2024 IBC became effective September 14, 2026.
    • The statewide code is a minimum standard; other jurisdictions may amend or alter it only pursuant to Oklahoma law and OUBCC administrative rules.
    • The International Building Code 2021 Edition was expressly not adopted for any purpose.
    • None of the IBC 2024 appendices are included in the statewide minimum code; other jurisdictions may adopt appendices under 59 O.S. § 1000.29.
    • All IBC 2024 chapters and provisions, including exceptions, not specifically modified, deleted, moved, or removed by the rules are adopted without modification.
    • Chapter 34 is not adopted and is not part of the statewide minimum code.

    code edition: International Building Code 2024 (as amended and modified by OUBCC) · effective date: 2026-09-14

    “748:20-2-1., 748:20-2-2., 748:20-2-3., and 748:20-2-4., adopt the IBC® 2024 edition, without appendices and establishes the IBC® 2024 edition as the statewide minimum code for commercial construction in the State of Oklahoma.”
    2 more reviewed findings on this topic
    • Adopted — Minimum building-code standards for residential and commercial construction throughout Oklahoma, including construction subject to local county or municipal enforcement.
      “Base model codes have been adopted by reference and amended at the state level.”
    • Adopted — Minimum building codes for residential and commercial construction throughout Oklahoma, including construction in unincorporated areas.
      “Codes and standards adopted by the Commission shall be the minimum standards for residential and commercial construction in this state.”
  • Who permits septicState

    On-site sewage treatment systems in Custer County under Oklahoma's statewide program.

    • DEQ assigns an ATC to the local DEQ Environmental Specialist based on property location.
    • Alternative systems require prior DEQ approval.
    “Before installing a new or modifying an existing on-site sewage treatment system, an Authorization to Construct (ATC) must be purchased and issued by DEQ.”
    One more reviewed finding on this topic
    • State — Statewide administration and regulatory oversight of individual and small public on-site sewage treatment systems in Oklahoma.
      “ECLS administers Oklahoma’s on-site sewage treatment program.”
  • Septic permitRequired

    Installing a new or modifying an existing on-site sewage treatment system in Custer County under Oklahoma's statewide DEQ program.

    • An Authorization to Construct must be purchased and issued by DEQ before installation or modification.
    • The ATC is assigned to the local DEQ Environmental Specialist based on the property location for review and issuance.
    • The Report for On-Site Sewage must be reviewed by DEQ before the ATC may be issued.
    • Alternative systems must be approved by DEQ before installation.
    • Effective November 1, 2025, individuals not certified through DEQ may install only one on-site sewage treatment system per calendar year.
    “Before installing a new or modifying an existing on-site sewage treatment system, an Authorization to Construct (ATC) must be purchased and issued by DEQ.”
    One more reviewed finding on this topic
    • Required — Installing a new or modifying an existing individual or small public on-site sewage treatment system statewide.
      “Before installing a new or modifying an existing on-site sewage treatment system, an Authorization to Construct (ATC) must be purchased and issued by DEQ. After the ATC is purchased, it is assigned to the local DEQ Environmental Specialist (ES), based on the location of the property, for review and issuance. The Report for On-Site Sewage (581) must be reviewed by DEQ before the ATC may be issued.”
  • Septic inspectionRequired

    New installations and modifications to on-site sewage systems in Custer County.

    • Inspection and approval may be performed by DEQ, or the system may be installed, self-inspected, and approved by a certified installer.
    • The system may not be placed into operation before the required inspection and approval.
    • Final inspections are documented on DEQ Form 641-576.
    • The information provided must identify all system components, their location, and minimum required separation distances under Chapter 641.
    • Final inspections performed by a certified installer must be submitted to DEQ within 15 days of completion.
    • Effective November 1, 2025, individuals not certified through DEQ may install only one on-site sewage treatment system per calendar year.
    “All new installations or modifications to an on-site sewage system must be inspected and approved by DEQ or installed, self-inspected and approved by a certified installer before the system may be placed into operation.”
  • Off-grid sanitationAllowed (with conditions)

    On-site sewage treatment systems used by Oklahoma homes and businesses where sewage is treated on the property rather than through a centralized sewer system.

    • The Report for On-Site Sewage determines which system types are allowed for the property and states minimum dispersal requirements based on residence size or small-public-system daily flow.
    • A DEQ Authorization to Construct is required before installing or modifying the system.
    • All new installations or modifications require DEQ inspection and approval, or certified-installer self-inspection and approval, before operation.
    • Alternative systems require DEQ approval before installation.
    • The system design depends on lot size and shape, residence size, and soil-test results.
    “determines what types of on-site systems are allowed for the property.”
  • Well permitRequired

    Groundwater wells drilled or used for non-domestic purposes in Oklahoma, including public water supply, industrial, commercial, oil and gas, poultry, medical-marijuana, and irrigation of more than 3 acres.

    • A well drilling contractor must obtain OWRB authorization and approval before drilling.
    • Authorization will not be issued unless the well location has an active groundwater use permit.
    • Groundwater permit applications must be filed before taking or using groundwater and before drilling.
    • The applicant must own or lease the land, the land must overlie a fresh groundwater basin or subbasin, the proposed use must be beneficial, and waste by depletion or pollution must not occur.
    • Failure to submit an intent-to-drill application when required may result in a penalty of up to $5,000 per day per violation.

    irrigation threshold for intent-to-drill authorization: > 3 acres (Irrigation of less than 3 acres is listed as not requiring intent-to-drill authorization.) · application response time: 5 business days approximately (OWRB staff response time stated on the Wells & Licensing page.) · maximum penalty for failure to submit required intent-to-drill application: <= 5000 USD per day per violation

    “Any well drilling contractor who intends to drill a groundwater well for non-domestic use must apply for authorization”
    4 more reviewed findings on this topic
    • Not required — Domestic groundwater wells serving household purposes, qualifying livestock, or irrigation of less than 3 acres in Custer County.
      “In Oklahoma, groundwater is considered private property that belongs to the overlying surface owner. A water permit is not required for domestic use of groundwater, but for all other uses, groundwater is subject to reasonable regulation by the OWRB.”
    • Required — Non-domestic groundwater wells in Custer County.
      “Any well drilling contractor who intends to drill a groundwater well for non-domestic use must apply for authorization and receive approval from the OWRB prior to drilling. Authorization will not be issued for any well location that does not have an active groundwater use permit.”
    • Not required — Domestic use of groundwater and domestic groundwater wells used for household purposes, qualifying livestock, or irrigation of less than three acres statewide.
      “A water permit is not required for domestic use of groundwater”
    • Not required — Domestic groundwater use in Oklahoma, including household purposes, livestock up to the land’s grazing capacity, and irrigation of less than 3 acres.
      “A water permit is not required for domestic use of groundwater”
  • Agricultural exemptionAvailable (with conditions)

    Construction of a farm home or other farm building under the Title 19 city-county planning and zoning act.

    • The statute states that no fees or permits are required for construction of any farm home or other farm building under this Act.
    • The quoted exemption is limited to the construction described in the statute and does not establish that every other state or local approval is waived.
    “No fees or permits shall be required for [...] any farm building.”
    One more reviewed finding on this topic
    • Available (with conditions) — The zoning power conferred by Oklahoma Title 19 on municipalities and counties, including county unincorporated areas, as applied to usual farm buildings used for agricultural purposes and the planning of agricultural crops.
      “shall not apply to [...] the usual farm buildings for agricultural purposes”
  • Subdividing landRegulated (with conditions)

    Residential developments outside Oklahoma municipal corporate limits, including plat approval and recording requirements.

    • A person creating or intending to create a residential development outside a city or town must file a plat describing sewage-treatment methods with the Oklahoma Department.
    • Department approval must be obtained before recording the plat, offering lots for sale, or beginning construction within the residential development.
    • The plat must include water-supply and sewage-treatment information, actual lot sizes, and the location of public water-supply sources within 300 feet.
    • The plat must be filed in the county land records after Department approval.

    Department approval effective period: 30 days after filing unless specifically rejected earlier · public water-supply search radius: 300 feet

    “Approval of the plat shall be obtained prior to recording the plat”
  • Driveway accessLimited

    Driveways connecting to Federal or State Highway rights-of-way in Oklahoma.

    • An approved Driveway Agreement is required before work on the State Highway right-of-way.
    • The application requires an original Driveway Agreement and a sketch or site plan.
    • Drainage must be properly disposed of and runoff may not run onto the highway.
    • If the driveway is within city limits, the Agreement must be signed or permitted in writing by a city authority.
    • No alteration or relocation may be made without prior written permission from ODOT or its authorized representatives.
    • The permit expires if the driveway is not constructed within six months after the effective date unless a written extension is requested.

    permit expiration period: 6 months (Unless the applicant requests a written time extension from ODOT.)

    “Under no circumstances shall the applicant be permitted to do any work on the State Highway right-of-way until an approved copy of the application is in hand.”
  • Permit feesPublished (with conditions)

    Construction permits and renewals issued by a state agency, municipality, or other political subdivision for work governed by Oklahoma Uniform Building Code Commission codes.

    • The OUBCC fee is not to exceed $5.00 for issuance and $5.00 for renewal.
    • The official FAQ states that current fees are $4.00 per permit.
    • The issuing state agency, municipality, or other political subdivision may levy an additional fee up to $0.50 per construction permit or renewal permit.

    permit issuance fee: 4 USD (The statutory range is not to exceed $5.00.) · permit renewal fee: 4 USD (The statutory range is not to exceed $5.00.) · additional issuing-jurisdiction fee: <= 0.5 USD (May be levied by the collecting state agency, municipality, or other political subdivision.)

    “Currently the fees are set at $4.00 per permit.”
  • Permit processPartial

    Projects subject to Oklahoma State Fire Marshal building-plan review.

    • All projects are reviewed through the OKSFM Accela Citizen Portal.
    • Plan review is not done over email.
    • Paper submittals mailed or dropped off at the office are not accepted.
    • Applicants must set up a login and password.
    • The page states that plans must meet minimum state codes adopted by the OUBCC.
    “All projects are reviewed through the OKSFM Accela Citizen Portal. Plan review is not done over email and paper submittals mailed or dropped off in the office are not accepted.”
  • county zoning authorityLimited

    County zoning authority in unincorporated areas under Oklahoma Statutes Title 19, Sections 868.1 through 868.22.

    • The authority applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
    • The zoning authority is for unincorporated areas of the county.
    • Existing lawful uses are protected except as otherwise provided by the statute.
    • The statute excludes public utilities subject to Corporation Commission or similar state or federal regulation, usual farm buildings for agricultural purposes, planting agricultural crops, and extraction of minerals.
    • Zoning regulations must address the statutory public-health, safety, welfare, transportation, utilities, public facilities, and land-use purposes.

    county population threshold: > 500000 persons (latest Federal Decennial Census)

    “population in excess of five hundred thousand (500,000)”
    2 more reviewed findings on this topic
    • Limited — County zoning regulations for unincorporated areas under Title 19, §§19-868.1 through 19-868.22.
      “The board of county commissioners is hereby empowered to adopt zoning regulations effective in the unincorporated areas of the county for the purposes of promoting the health, safety, peace, morals, comfort and the general welfare of the inhabitants; lessening danger and congestion in public transportation and travel; securing safety from fire and other dangers; preventing overcrowding of land; avoiding undue concentration of population; providing adequate police protection, transportation, water, sewerage, schools, parks, forests, recreational facilities, airports, military and naval facilities, and other public requirements; and preventing undue encroachment thereon. The zoning power hereby conferred shall not be exercised so as to deprive the owner of any existing property of its use or maintenance for the purpose to which it is then lawfully devoted except as hereinafter provided; nor shall the provisions of this act apply to the erection, installation and use of structures and equipment by public utilities subject to the jurisdiction and regulation of the Corporation Commission of the State of Oklahoma or other similar state or federal regulatory bodies; nor to the erection or use of the usual farm buildings for agricultural purposes, the planting of agricultural crops or the extraction of minerals.”
    • Limited — County planning and zoning through a cooperative city-county planning commission for the unincorporated area of an eligible county.
      “county plan within the unincorporated area”
  • county building authorityLimited

    County adoption and enforcement of building or fire codes in unincorporated areas under 19 O.S. § 868.17A.

    • The authority applies only in unincorporated areas.
    • The provision does not apply to counties not subject to 19 O.S. §§ 868.1 through 868.22; those provisions apply only to counties with a population in excess of 500,000 according to the latest Federal Decennial Census.
    • Public-utility electric supply and communication lines regulated by the Corporation Commission are excluded.
    • The county may prescribe permits, notices, inspection procedures, and reasonable fees sufficient to cover inspection and enforcement expenses.
    • Building inspectors must be licensed by Oklahoma.

    county population threshold: > 500000 persons (latest Federal Decennial Census) · inspection and enforcement fees: reasonable and sufficient to meet inspection and enforcement expense

    “may, by resolution, adopt building codes, fire codes”
    One more reviewed finding on this topic
    • Limited — County adoption and enforcement of building and fire codes, including permits and inspections, in unincorporated areas under Title 19, §§19-868.1 through 19-868.22.
      “The board of county commissioners may, by resolution, adopt building codes, fire codes, or both building and fire codes which shall be designed for the purpose of promoting, benefiting, and protecting the public health, safety and welfare of the people of this state. The codes adopted pursuant to this section shall be applicable only in the unincorporated areas of the county. All building materials, equipment, and methods of installation or construction shall be at least the equivalent of that prescribed in any building or fire code adopted by the board of county commissioners in quality, strength, effectiveness, fire resistance, durability, and safety. Any codes adopted pursuant to this section shall not apply to the installation and maintenance of electric supply and communication lines of public utilities and public service companies which are regulated by the Corporation Commission. The provisions of this section shall not apply to any area located within any county not subject to the provisions of Section 868.1 through 868.22 of Title 19 of the Oklahoma Statutes. Building inspectors may be employed by a county to enforce building or fire codes. The building inspectors shall be licensed by the State of Oklahoma. The building inspectors shall enforce the provisions of any building or fire code adopted pursuant to this section and shall be authorized to inspect all buildings for the purpose of discharging the duties imposed by this section or by any building or fire code adopted by the board of county commissioners. The board of county commissioners may adopt rules to carry out the inspections to enforce the building or fire codes, may prescribe the necessary permits, notices, and inspection procedures and may set and determine fees. The fees shall be reasonable and shall be sufficient to meet the expense of inspection and enforcement of the building or fire codes.”

Still unanswered

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

  • Inspections — Building inspections in unincorporated Custer County.
  • Certificate of occupancy — Certificates of occupancy in unincorporated Custer County.
  • Mandatory utility hookup — Water and sewer connection requirements in unincorporated Custer County.
  • Short-term rentals — Short-term rentals in unincorporated Custer County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Custer County, Oklahoma

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

Custer County scores 52/100 on the Bolthole Index, a solid county profile. Its strengths: manageable long-term carry cost and sparse surroundings — about 2,038 people within a 30-minute drive. Watch-outs: workable self-sufficiency basics (28.6″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.

Do you need a building permit in Custer County, Oklahoma?

Custer County requires a building permit only in limited cases (such as floodplains or specific zones), and it has no county-wide zoning. Onsite septic is permitted by Oklahoma Department of Environmental Quality (DEQ). 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 Custer County?

Living in an RV on your own land in Custer County is allowed: County zoning restrictions on RV occupancy in unincorporated Custer County. The county letter excepts state statutes and city ordinances. This finding does not establish that RV occupancy satisfies septic, health, floodplain, or other applicable rules. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Custer County, Oklahoma?

Land in Custer County runs about $1,869 per acre, based on the latest county data.

What is the water situation in Custer County?

Custer County gets about 28.6" of rain a year, with severe drought in roughly 38.7% of years.

How remote is Custer County?

A representative private-land location has about 2,038 people within a 30-minute drive and 986,886 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 Custer compares in Oklahoma

Compare side-by-side →See all 77 Oklahoma counties ranked →