Building permits, zoning and land rules in Greer County, Oklahoma
45Index Score / 100 #65 of 77 in Oklahoma
A single-family home, duplex, barn, shed or attached carport in unincorporated Greer County, Oklahoma does not need a State Fire Marshal building permit1. Unincorporated Greer County has no county zoning ordinance, but Mangum has municipal zoning and Oklahoma's statewide minimum building codes still apply234. Septic systems need an Oklahoma DEQ Authorization to Construct before installation5.
At a glance
Building permit
No State Fire Marshal permit for a home, duplex, barn, shed or attached carport in unincorporated Greer County16
Zoning
No zoning in unincorporated Greer County; Mangum has municipal zoning723
Septic
Oklahoma DEQ Authorization to Construct required before installation5
On-site sewage (septic) system soil tests, Authorization to Construct, and final inspections for Greer County, since Oklahoma has no separate county septic authority
General Greer County government contact and the elected Board of County Commissioners; the county's office listing shows no building, planning/zoning, or floodplain department to route those questions to instead
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Do you need a building permit in Greer County, Oklahoma?
A single-family home, duplex, barn, shed or attached carport in unincorporated Greer County does not need a State Fire Marshal permit1. Greer County also does not issue a county building permit for those rural residential projects6. The exemption is limited to State Fire Marshal permitting and does not erase other requirements: Oklahoma's statewide minimum codes apply to residential and commercial construction, and the Construction Industries Board enforces electrical, mechanical, plumbing and fuel-gas minimum codes in unincorporated areas4. The 2024 International Residential Code and statewide building-code editions took effect on September 14, 2026104. A commercial or other project that does require a State Fire Marshal permit must be inspected for compliance11. For those state-permitted projects, a Certificate of Occupancy follows successful completion of the process; there is no separate Certificate of Occupancy application or inspection12.
Who do you call about permits and county government in Greer County?
Greer County's official directory lists no county building, codes, planning or zoning office67. The Commissioners' Office is the county contact for general government questions and for confirming whether a parcel is subject to a county process13. Electrical, plumbing, mechanical and fuel-gas code enforcement in unincorporated Greer County belongs to the state Construction Industries Board4. Projects under State Fire Marshal jurisdiction use the state's online plan-review process, and every state-permitted project must be inspected1411. Municipal rules are separate: Mangum has zoning districts and sends rezoning recommendations to its Board of Commissioners, while septic remains with Oklahoma DEQ for addresses throughout Greer County315. Ask the relevant town about its building permits before work inside municipal limits.
Does Greer County have zoning?
Unincorporated Greer County has no county zoning ordinance, so county zoning does not set minimum dwelling size, minimum lot size, setbacks, lot coverage, building height, or locations for accessory dwellings, RVs, tiny homes or manufactured homes there2. That answer stops at municipal boundaries: Mangum has municipal zoning districts and a local rezoning process3. Deed restrictions, lender requirements and statewide manufactured-home installation rules can still apply on rural parcels16. Oklahoma also excludes usual farm buildings used for agricultural purposes from county zoning authority, but that does not waive other state or federal requirements17. Land division is separate from zoning: residential development outside a municipality still needs state plat approval before recording, sale or construction, and a county clerk cannot record a residential plat containing a lot smaller than 2.5 acres without the approval stamp18.
How do septic permits work in Greer County?
Oklahoma has no separate county septic authority; the Department of Environmental Quality runs the on-site sewage program statewide, including in Greer County15. Before installing a new system or modifying an existing one, you must purchase and receive a DEQ Authorization to Construct, which is assigned to the local DEQ Environmental Specialist based on where the property sits5. Every new or modified system must then be inspected and approved by DEQ, or installed, self-inspected and approved by a certified installer who files the paperwork with DEQ within 15 days19. Soils are the reason to plan ahead here: only about 5.7% of Greer County's soils are rated as free of severe limits for a conventional septic drain field, so most sites in the county should expect a soil and percolation test to push them toward an aerobic, drip-irrigation or lagoon system rather than a standard trench field20. The local DEQ Environmental Specialist reviews all of this and issues the paperwork21.
Can you live in an RV or tiny home on your land in Greer County?
Unincorporated Greer County has no zoning restriction on RV, tiny-home or manufactured-home occupancy2. That is not a statewide guarantee that every setup is allowed: DEQ sanitation requirements, utility rules, deed restrictions and manufactured-home installation standards may still control the project516. An occupied manufactured home is treated as a permanent installation and must follow federal standards or approved manufacturer instructions16. Mangum has its own municipal zoning, so the rural county answer does not apply to property inside Mangum22. We could not confirm the occupancy rules of Greer County's other incorporated towns; ask the town directly before placing or occupying an RV or tiny home inside municipal limits.
Building a home in Greer County: the steps, in order
Confirm that the parcel is in unincorporated Greer County; Mangum has municipal zoning, and other towns may have their own building rules3.
Confirm the project category: a rural home, duplex, barn, shed or attached carport needs no State Fire Marshal permit, while a state-permitted project requires inspections and the completed process produces its Certificate of Occupancy11112.
Plan to Oklahoma's statewide minimum codes and contact the Construction Industries Board about electrical, plumbing, mechanical and fuel-gas enforcement4.
Order DEQ soil and percolation testing, then obtain the DEQ Authorization to Construct before installing the septic system5.
Arrange the required septic inspection before using the system19.
Obtain ODOT approval before building a driveway in a state-highway right-of-way23.
A domestic well needs no OWRB water permit, but non-domestic groundwater use is regulated9.
What to check before you buy land in Greer County
Water: a domestic well needs no OWRB water permit, but irrigation over 3 acres and other non-domestic uses are regulated9. Septic and soils: only about 5.7% of Greer County soils lack severe limits for a conventional drain field, so get the DEQ site work before choosing a system205. Flood: we could not confirm Greer County's local floodplain administrator, so ask the Commissioners' Office who handles a floodplain development application before buying mapped flood-prone land1324. Access: ODOT approval is required before work on a driveway in a state-highway right-of-way23. Qualifying farmers and ranchers may apply for Oklahoma's agricultural sales-tax exemption card through the Oklahoma Tax Commission or seek help from the county assessor25. Greer County's effective property tax rate is about 0.6%, and the median annual bill is about $5902627.
Watch-outs
Greer County's own office listing shows no building, planning/zoning, or floodplain department; that is an absence of a county office, not proof no rule can ever apply, so confirm with the Commissioners' Office before relying on it137.
The State Fire Marshal permit exemption for single-family homes, duplexes, barns, sheds and attached carports applies only in unincorporated areas and only to that state permit; statewide codes and Construction Industries Board trade enforcement still apply14.
Mangum has municipal zoning, so do not apply the unincorporated county's RV, tiny-home, setback or minimum-size answers to a parcel inside Mangum22.
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.
Greer County highlighted among the Oklahoma counties · colored by Index score
How Greer County scores
Seclusion8080% ev.
Self-Sufficiency1698% ev.
Admin Boringness8290% ev.
Durability31100% ev.
Property Autonomy69100% ev.
Carry Cost83100% 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 →
$79kTypical home
0.6%Property tax
$1,439Land / acre
26.4"Annual rain
50.3% of yrsSevere drought
58.4 / yr (+31.3)Mid-century 100°F days
29.1 daysMid-century dry spell
2.03" (+1.3%)Mid-century 1-day rain
1.33×Wildfire change factor
100%Forward climate coverage
$2,754Home insurance / yr
2.6% / yrInsurance growth
0.95%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
203,899People within 2 hr
7,360Radius comparison (15 mi)
8.6People / sq mi
0%Federal land
94%Land at 15% slope or less
5.7%Soils rated "not limited" for septic (strict USDA rating)
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Cities and towns in Greer 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.
What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.
Greer County rules
Building permitNot required
Construction or alteration of a single-family dwelling, duplex residential dwelling, barn, shed, or carport attached to a single-family dwelling or duplex residential dwelling located in an unincorporated area of Greer County.
This statutory exception concerns permits from the State Fire Marshal.
The exception does not establish that local authorities may not require permits, plans, or specifications under a city, town, or county ordinance or order.
“Furthermore, nothing in this subsection shall be construed as requiring a person to obtain a permit from the State Fire Marshal for the construction or alteration of a single-family dwelling, duplex residential dwelling, barn, shed, or carport attached to a single-family dwelling, or duplex residential dwelling when such structure is located in an unincorporated area of a county.”
Owner-builder exemption · follows from the permit answerNot needed
Unincorporated Greer 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.
This statutory exception concerns permits from the State Fire Marshal.
The exception does not establish that local authorities may not require permits, plans, or specifications under a city, town, or county ordinance or order.
“Furthermore, nothing in this subsection shall be construed as requiring a person to obtain a permit from the State Fire Marshal for the construction or alteration of a single-family dwelling, duplex residential dwelling, barn, shed, or carport attached to a single-family dwelling, or duplex residential dwelling when such structure is located in an unincorporated area of a county.”
Zoning districts · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Minimum dwelling size · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Minimum lot size · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Setbacks · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Lot coverage · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Building height · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Living in an RV · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Camping on your land · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Tiny homes · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Manufactured homes · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
Accessory dwellings · by state lawNo county rule
Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org.
Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census.
The zoning power is limited to unincorporated areas of the county.
“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.”
County-wide zoningAbsent
Greer County's official offices list shows no planning or zoning department, indicating no countywide zoning in the unincorporated county.
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.”
5 more reviewed findings on this topic
Adopted (with conditions) — Residential and commercial construction in Greer County under Oklahoma's statewide minimum building-code framework.
“The OUBCC has adopted the 2024 editions of the International Building Code, International Existing Building Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, International Plumbing Code and International Residential Code, with amendments. These codes will go into effect on September 14, 2026. The 2018 codes, as amended will stay in effect until September 14, 2026.”
Adopted (with conditions) — Statewide minimum building-code requirements applicable in Greer County, including unincorporated areas and incorporated municipalities, subject to local enforcement arrangements and potentially higher local standards.
“2026 09 14 IBC 2024 Permanent Rule | Sep. 14, 2026 | | Adoption of the 2024 Edition of the IBC”
Adopted (with conditions) — State-adopted minimum building codes applicable throughout Oklahoma, including Greer County, subject to the applicable code scope and lawful local higher standards.
“Codes and standards adopted by the Commission shall be the minimum standards for residential and commercial construction in this state.”
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.”
InspectionsRequired
Projects permitted by the Oklahoma State Fire Marshal in Greer County.
All permitted projects must be inspected for compliance with the permit and applicable codes.
Inspection requests must follow the project permit comments and required additional permits.
Additional inspections caused by noncompliance, deviations, or missing documents may incur a $100 site-visit fee.
additional inspection fee: 100 USD per site visit (Applies to additional on-site inspections caused by failure to comply with applicable codes, deviation from approved plans, or failure to have appropriate documents onsite.)
“All permitted projects are required to be inspected for compliance with the permit and the applicable codes.”
Certificate of occupancyLimited
Projects under Oklahoma State Fire Marshal permitting jurisdiction in Greer County that successfully complete the required multi-step process and final inspection.
A Certificate of Occupancy is issued at the end of a successfully completed multi-step process.
There is no separate Certificate of Occupancy application.
There is no separate Certificate of Occupancy inspection.
The source describes the State Fire Marshal process and does not establish a countywide certificate-of-occupancy requirement for qualifying unincorporated residential structures exempt from State Fire Marshal permitting.
“A Certificate of Occupancy is issued as the end result of a multi-step process being sucessfully completed. There is not an application for a CO, and there is not a CO inspection.”
Who permits septicState
Statewide administration and regulatory oversight of individual and small public on-site sewage treatment systems in Oklahoma.
The DEQ Environmental Complaints and Local Services Division administers the on-site sewage treatment program, including soil tests, designs, installation inspections, and oversight of certified installers, profilers, and septage pumpers and transporters.
Installing a new or modifying an existing on-site sewage treatment system in Greer County
An Authorization to Construct must be purchased and issued by DEQ before installation or modification.
The authorization 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 Authorization to Construct may be issued.
Alternative systems must be approved by DEQ before installation.
Effective November 1, 2025, an individual 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
All new installations or modifications to on-site sewage systems in Greer County
The system must be inspected and approved by DEQ, or installed, self-inspected, and approved by a certified installer, before placement into operation.
Final inspections are documented on DEQ Form 641-576.
Final inspections performed by a certified installer must be submitted to DEQ within 15 days of completion.
certified-installer final inspection submission deadline: 15 days
“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”
3 more reviewed findings on this topic
Limited — Groundwater wells in Greer County
“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.”
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)
Individuals or businesses engaged in farming or ranching for profit who seek an Oklahoma agricultural sales-tax exemption for qualifying farm, ranch, or agricultural purchases, including applicants associated with Greer County.
The exemption concerns sales tax on personal property purchased for a farm, ranch, or agricultural endeavor, such as tractors, feed, fertilizer, and related essentials.
Individuals or businesses must be engaged in farming or ranching for profit and may qualify under Title 68 §1358.1.
A permit card must be obtained from the Oklahoma Tax Commission and used for tax-exempt purchases.
Applicants may apply online through OkTAP or obtain assistance from the local county assessor's office.
Applicants should submit an IRS Schedule F, Form 4835, Form 1065, Form 1120, Form 1120S, or other documentation demonstrating regular farming or ranching for profit; a three-year business plan may be uploaded if listed documents are unavailable.
All applications are verified by the Oklahoma Tax Commission before the exemption is granted.
Once accepted, the exemption is valid for three years and must then be renewed with required supporting documentation.
Greer County's official county information page directs applicants to the Assessor's Office to apply for or renew a farm sales tax exemption card.
exemption validity period: 3 years (renewal requires supporting documentation)
“Pursuant to Title 68 Section 1358.1 of the Oklahoma Statutes, individuals or businesses engaged in farming or ranching for profit may qualify for an agricultural exemption. A permit card must be obtained from the Oklahoma Tax Commission (OTC) and used when making a purchase tax-exempt for their farm or ranch.”
3 more reviewed findings on this topic
Available — County zoning authority as applied to the erection or use of usual farm buildings for agricultural purposes and the planning of agricultural crops in Oklahoma.
“Fourth, county zoning authority does not apply to the erection or use of the usual farm buildings for agricultural purposes or the planning of agricultural crops.”
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”
Available (with conditions) — Construction of a farm home or other farm building under the Title 19 city-county planning and zoning act.
“No fees or permits shall be required for [...] any farm building.”
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.”
One more reviewed finding on this topic
Required — Driveway access connecting property in Greer County to a state highway right-of-way.
“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.”
Building in a floodplainLimited
Oklahoma's statewide floodplain-management framework and OWRB coordination of participating communities; the sources do not establish one uniform statewide permit requirement for all private development.
The OWRB provides guidance and coordination rather than administering every local floodplain regulation.
Floodplain regulations are developed and enforced by local participating communities in designated flood hazard areas.
Participation in the National Flood Insurance Program is community-based; local requirements can therefore vary by participating community.
The Oklahoma Floodplain Management Act was passed in 1980.
A 2004 amendment requires floodplain administrators to become accredited through the OWRB.
“The Oklahoma Floodplain Management Act, passed in 1980, authorizes communities to develop floodplain regulations, designate flood hazard areas, and establish floodplain boards.”
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.”
One more reviewed finding on this topic
Published (with conditions) — Development in a regulatory floodplain in Oklahoma, including applicable Greer County areas.
“Anyone wishing to develop in the floodplain must obtain a permit application from the floodplain administrator, fill it out, pay appropriate fees, and submit it for approval before beginning any development activities.”
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.”
Inside cities and towns in Greer County
Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.
Local zoningPresent (with conditions)
Land and development within the corporate limits of the City of Mangum, Greer County, Oklahoma.
The ordinance assigns zoning-plan authority to the Planning and Zoning Commission.
The ordinance provides that regulations may differ between zoning districts.
Variances require public notice and hearing and are subject to appropriate conditions and safeguards.
The ordinance states that temporary and conditional permits in undeveloped sections may not exceed two years.
The document states that an emergency was declared and that the ordinance goes into force immediately upon passage and publication; no adoption date is stated in the document.
temporary conditional permit duration: <= 2 years maximum (For structures and uses in undeveloped sections that do not conform to the applicable use-district regulations.)
“Discussion and possible action regarding whether the City should move forward with providing the proper notices and to hold a hearing on whether 207 N. Pennsylvania should be rezoned, a variance granted, or a fine levied.”
One more reviewed finding on this topic
Present (with conditions) — Zoning regulation within the incorporated City of Mangum, Greer County, Oklahoma, including parcel-level use districts such as U-1 and U-2.
“Discussion and rendering a recommendation to the Board of Commissioners with regard to the presentation by Frank Keplar and Melanie Keplar to rezone the west 178.8 feet of Lot 16 and the west 181.5 feet of the north half of Lot 15 all in Block "C", in the Tittle Addition, to the Town, now city of Mangum, Greer County, Oklahoma less and except all of the oil, gas, and other minerals, also known as 330 N. Louis Tittle Avenue, Mangum, OK 73554, from a U-1 use to a U-2 use for installation of storage units or other commercial uses in accordance with 12-2-2 of the City's Ordinances. The recommendation will be submitted to the Board of Commissioners for official action.”
Still unanswered
We looked and could not find an official answer yet. Silence is not permission — ask the county directly.
Mandatory utility hookup — Whether water or sewer connection is required for property development or occupancy in Greer County
Short-term rentals — Short-term rental use in Greer 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 Greer County, Oklahoma
Is Greer County a good place to live off-grid or homestead?
Greer County scores 45/100 on the Bolthole Index, a marginal county profile. Its strengths: manageable long-term carry cost and low administrative friction for a quiet rural property. Watch-outs: workable self-sufficiency basics (26.4″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.
Do you need a building permit in Greer County, Oklahoma?
Greer 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 Oklahoma Department of Environmental Quality (DEQ) – On-Site Sewage Programs. 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 Greer County?
Living in an RV on your own land in Greer County is allowed: Unincorporated Greer County: no county rule sets this, because Greer County has adopted no county zoning ordinance (Oklahoma law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing greer.okcounties.org. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. The act applies only to counties having a population in excess of 500,000 according to the latest Federal Decennial Census. A tiny home is allowed. Confirm with the county before relying on it.
How much does land cost in Greer County, Oklahoma?
Land in Greer County runs about $1,439 per acre, based on the latest county data.
What is the water situation in Greer County?
Greer County gets about 26.4" of rain a year, with severe drought in roughly 50.3% of years.
How remote is Greer County?
A typical private-land location has about 7,360 people within 15 miles and 623,017 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.
