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

At a glance

Building permit

Limited record; ask the Murray County Clerk whether a local land-use approval applies¹

Zoning

County zoning could not be confirmed from a valid Oklahoma ordinance²

Septic permits

Oklahoma DEQ Authorization to Construct required before a new installation or modification⁴³

RV living

Unconfirmed; ask the Murray County Clerk and the relevant municipality²

Tiny home

No county-specific occupancy or minimum-size rule confirmed²

Owner-builder

No county-specific exemption confirmed⁵

Domestic well

Domestic groundwater use is exempt from the state water-permit requirement⁶

Who to call

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

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

The available record does not confirm a standard county residential building permit or inspection program for unincorporated Murray County, Oklahoma¹. That is not the same as a verified no-permit rule. Before ordering plans or starting site work, give the Murray County Clerk the parcel location and ask which local approvals apply⁷. Oklahoma has adopted statewide minimum residential and commercial construction codes, and local jurisdictions may enforce higher standards⁸. The state adoption record identifies the residential code as the 2024 IRC with Oklahoma amendments⁸. A usual farm building used for agricultural purposes has a state-law zoning exemption, and the planning-and-zoning act waives its farm-building permit and fee, but that limited exemption does not erase unrelated health, environmental or access requirements⁹¹⁰.

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

No verified Murray County building department or residential inspection office appears in the available county record¹. The practical first call for unincorporated land is the Murray County Clerk, whose published contact is on the official City of Davis government contacts page⁷. Ask the Clerk to identify the current office for parcel-specific building, land-use, floodplain and county-road questions, because those responsibilities could be separate even when there is no general residential inspection program⁷. For septic work, go directly to the Oklahoma Department of Environmental Quality rather than assuming the county courthouse issues the authorization⁴¹¹. Projects inside Sulphur, Davis or another municipality require a separate city check because the available material does not establish one zoning or permit pattern across incorporated and unincorporated Murray County².

Does Murray County have zoning?

A valid Oklahoma source did not confirm countywide zoning districts, a zoning map, setbacks, lot coverage, building-height limits or a minimum dwelling size for Murray County². Do not rely on the county-hosted document labeled as a zoning ordinance: its text concerns another state, so it cannot establish an Oklahoma parcel rule. The safe parcel-level question for the Murray County Clerk is whether the land is inside a municipality, a flood hazard area or another district with its own review⁷. Oklahoma law separately exempts usual farm buildings used for agricultural purposes and agricultural crop planning from the zoning power covered by the state act⁹. For newly platted residential developments outside municipal limits, state environmental law matters even without a confirmed local dimensional rule: Department approval is required before recording the plat, offering lots for sale or starting construction¹².

How do septic permits work in Murray County?

Oklahoma DEQ handles on-site sewage systems in Murray County, and an Authorization to Construct must be purchased and issued before installing a new system or modifying an existing one⁴³. DEQ reviews the Report for On-Site Sewage before issuing the authorization, then assigns the purchased application to a local environmental specialist based on the property's location¹³. A new or modified system must be inspected and approved by DEQ, or installed, self-inspected and approved through the certified-installer process, before operation¹⁴. Only 7.7% of county soils are rated without severe limitations for a conventional septic drain field, so make the site evaluation an early feasibility step rather than assuming a standard lateral field will work¹⁵. For a residential-development plat outside city limits, the state plat rule uses a 2.5-acre threshold and a 300-foot public-water-source condition; it is not a universal minimum lot size for every parcel¹⁶.

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

Long-term RV occupancy, temporary camping and tiny-home occupancy on private land remain unconfirmed for Murray County, Oklahoma². A missing rule is not permission, especially when the parcel may fall inside municipal limits or a flood hazard area. Ask the Murray County Clerk which jurisdiction controls the address, then ask that jurisdiction specifically about full-time RV use, temporary occupancy during construction, utility connections, setbacks and minimum dwelling size⁷. A manufactured home has a clearer statewide installation rule: an occupied manufactured home is treated as a permanent installation, and new units must follow federal model installation standards or approved manufacturer instructions¹⁷. Wastewater remains regulated regardless of what form the dwelling takes, because a new or modified on-site sewage system needs Oklahoma DEQ authorization before installation³.

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

1. Confirm whether the parcel is unincorporated and ask the Murray County Clerk which local building, land-use, floodplain and access reviews apply⁷.

1. Resolve wastewater early: submit the required on-site sewage report and obtain Oklahoma DEQ's Authorization to Construct before septic installation³¹¹.

1. If the driveway enters a state or federal highway right-of-way, obtain an approved ODOT Driveway Agreement before doing right-of-way work; the approval expires after 6 months unless ODOT grants a written extension¹⁸.

1. For a domestic well, the qualifying household use is exempt from the state water-permit requirement, but the well still must meet state drilling and completion standards⁶.

1. Build to the applicable Oklahoma construction code and complete the required septic inspection before placing the sewage system into operation⁸¹⁴.

What should you check before buying land in Murray County?

Start with septic feasibility: only 7.7% of Murray County soils are rated without severe limitations for a conventional drain field, so an unsuitable site can change the system design and budget¹⁵. About 74.5% of the land is at a 15% slope or less, but parcel-level grade, drainage and flood exposure still need direct review¹⁹. Murray County averages about 40 inches of precipitation annually and has experienced severe drought in 22.1% of years, making both drainage and water reliability worth checking²⁰²¹. If a driveway will meet a state highway, price and schedule the ODOT access agreement before closing¹⁸. The effective property-tax rate is about 0.4%, with a median annual bill near $665, while the typical home value is about $176,827²²²³²⁴. Finally, confirm city limits and every unresolved local rule with the Murray County Clerk before treating rural land as unrestricted⁷.

Watch-outs

• The county-hosted zoning and subdivision documents identified during review use Minnesota law and Minnesota place names, so they do not establish zoning or subdivision rules in Murray County, Oklahoma².
• Murray County RV occupancy, temporary camping, tiny-home rules, setbacks, minimum dwelling size, certificates of occupancy and residential inspections could not be confirmed; ask the Murray County Clerk which office has jurisdiction over the parcel⁷.
• A state highway driveway needs an approved ODOT agreement before any work begins in the right-of-way¹⁸.

Sources

1. Murray County Zoning Ordinance (2026 county census)
2. Murray County Zoning Ordinance (2026 county census)
3. On-Site Sewage Information, quoted and re-checked
4. Oklahoma DEQ On-Site Sewage Treatment (2026 county census)
5. (2026 county census)
6. Water Use Permitting, quoted and re-checked
7. Murray County Clerk (davisok.city)
8. Codes & Rules, quoted and re-checked
9. Oklahoma Statutes, Title 19 — Zoning exemptions and farm-building permits (Oklahoma statewide rule), quoted and re-checked
10. Oklahoma Statutes, Title 19, Section 19-863.25 (Oklahoma statewide rule), quoted and re-checked
11. Oklahoma Department of Environmental Quality (oklahoma.gov)
12. Oklahoma Statutes, Title 27A — Environment and Natural Resources (Oklahoma statewide rule), quoted and re-checked
13. On-Site Sewage Information, quoted and re-checked
14. On-Site Sewage Information, quoted and re-checked
15. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
16. Oklahoma Statutes, Title 27A — Environment and Natural Resources (Oklahoma statewide rule), quoted and re-checked
17. Title 765 Oklahoma Used Motor Vehicle and Parts Commission Rules and Regulations (Oklahoma statewide rule), quoted and re-checked
18. Instructions for Driveway Permit Application (Oklahoma statewide rule), quoted and re-checked
19. Share of land at 15% slope or less: Bolthole Index county data
20. Annual precipitation: Bolthole Index county data
21. Share of years in severe drought: Bolthole Index county data
22. Effective property tax rate: Bolthole Index county data
23. Median property tax bill: Bolthole Index county data
24. Typical home value (Zillow): Bolthole Index county data

Written September 27, 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.