Unincorporated Miller County, Arkansas does not require a residential building permit, but the statewide building code still applies12. Inside Texarkana, the city issues building permits and sets zoning34. Septic permits for every Miller County address, city or not, come from the Arkansas Department of Health or its authorized agent5. County zoning for unincorporated land is unconfirmed, so ask the County Judge's Office.
At a glance
- Building permit
- Not required for a home in unincorporated Miller County; the statewide building code still applies. Texarkana issues its own building permits123
- Zoning
- Unincorporated county zoning is unconfirmed; the county says it has no planning board. Texarkana has its own zoning674
- Septic permits
- Arkansas Department of Health or its authorized agent: construction permit, inspection, then operation permit58
- Sewer connection
- Required when a sanitary sewer is within 300 feet and reachable without crossing another owner's land9
- Owner-builder
- Contractor-license exemption for your own residence, one residence per calendar year; it does not waive permits10
- RV living
- Private-land occupancy rule unconfirmed; health rules apply to parks with 3 or more paid spaces11
- Tiny home on wheels
- Private-lot occupancy rule unconfirmed; state park rules classify the unit by plumbing and inspection status12
- Septic soil difficulty
- Only 6.9% of county soils are rated not limited for a conventional drain field13
Who to call
Also useful
Starting point for questions about county permit applications, planning, and unincorporated land rules
400 Laurel Street, Suite 115, Texarkana, AR. 71854
Septic permits
Arkansas Department of Health, Onsite Wastewater Program
Onsite wastewater policy and permit review in cooperation with the local Environmental Health Specialist
4815 W. Markham Street, Slot 46, Little Rock, AR 72205
Also useful
Miller County 911 Address Authority
Assigning a registered 911 address for new property development, homes, and businesses
400 Laurel Street, Suite 115, Texarkana, AR. 71854
Contact details are copied from each office’s official page and were checked against it on October 16, 2026.
Off-grid gear
Going off-grid in Miller County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Miller County, Arkansas?
An ordinary home in unincorporated Miller County does not require a residential building permit1. Confirm the answer for the specific parcel with the Miller County Judge's Office before work begins7.
No local permit does not mean no construction standard. The Arkansas Building Code is adopted by the State Fire Marshal and applies even in rural and unincorporated areas where no permit or inspection is required14. The statewide code covers new structures and applicable alterations, additions, and changes in use15.
The county's answer stops at the city line. Inside Texarkana, the city's own offices handle building permits3; septic permits there still go through the Arkansas Department of Health health unit for Miller County16.
Who handles Miller County building permits and property setup?
Miller County does not list a dedicated building department, and an ordinary home in an unincorporated area does not require a county residential building permit1. Start parcel-specific questions with the Miller County Judge's Office at 400 Laurel Street, Suite 115 in Texarkana or 870-774-13017. Building inspections and certificates of occupancy in unincorporated Miller County could not be confirmed, so ask that office which authority applies before ordering materials.
A new rural address is a separate step. The Miller County 911 Address Authority says people developing property or building a home should request a registered emergency address; call 870-840-854017.
Does Miller County, Arkansas have zoning?
Zoning for unincorporated Miller County is unconfirmed6. Arkansas counties can zone unincorporated land only through a county planning board18, and the county's transparency page says Miller County currently has no planning board7. That does not by itself settle setbacks, minimum dwelling size, or lot-coverage limits for a given parcel, so ask the County Judge's Office for the ordinance that governs it and get the answer in writing.
Inside Texarkana, the city's Planning and Zoning Division sets zoning, including residential districts such as R-1 Rural Residential4. Land inside a city boundary should be checked with that city, not treated as unincorporated Miller County.
How do septic permits work in Miller County?
The Arkansas Department of Health or its authorized agent issues septic permits for Miller County; where no agent is designated, applications go to the Department5. Its Onsite Wastewater Program works with the local Environmental Health Specialist, and its Environmental Health contact is 501-661217119. A construction permit must be issued before any new onsite wastewater system is built, altered, repaired or extended8. The installer then notifies the agent for inspection and submits documentation to the local health unit within 5 days, and the system cannot be used until a permit for operation is issued20.
The review fee is $30 for a house of 1,500 square feet or less, rising to $150 above 4,000 square feet, and $30 for an alteration, repair or extension21. A permit may be refused where public sewer is reasonably available8; a property must connect to a sanitary sewer within 300 feet that it can reach without crossing another person's land, and privies and onsite systems are barred there9. Authorized composting or incinerating toilets can be components of an approved system, but other wastewater still needs compliant treatment22.
Only 6.9% of Miller County soils are rated not limited for a conventional drain field, so expect a site evaluation and possibly an engineered system13. Dividing land into lots adds a step: subdivision plans that use onsite systems go to the Department for approval, with a plan-review fee of at least $100 for one lot, $25 for each additional lot, and a $1,500 maximum23.
Can you live in an RV or tiny home in Miller County?
A rule for living in a single RV or tiny home on private land in unincorporated Miller County could not be confirmed. Ask the County Judge's Office about land use and the Arkansas Department of Health about wastewater before moving onto the parcel719.
Arkansas does regulate qualifying parks, but that park rule does not answer the single-parcel question. A parcel with 3 or more paid spaces for RVs, tiny houses on wheels, or mobile homes is treated as a regulated park when placement or maintenance services are provided for a fee11. Under that framework, a tiny house on wheels counts as a mobile home if plumbed and inspected under the state plumbing code, and as an RV if not12.
What are the steps to build a home in Miller County?
- Confirm that the parcel is outside an incorporated city such as Texarkana; the no-residential-permit finding applies to unincorporated Miller County1.
- Ask the County Judge's Office to confirm zoning, setback, inspection, floodplain, access, and occupancy requirements for the legal description7.
- Request a registered emergency address from the Miller County 911 Address Authority17.
- Check whether a sanitary sewer lies within 300 feet; if not, contact the Environmental Health Specialist for septic review before fixing the house site919.
- Get the septic construction permit before work starts, and do not move in until the permit for operation is issued8.
- Design and build to the statewide Arkansas code even if no local permit or inspection is required2.
- If acting as your own contractor, the owner-builder exemption covers contractor licensing for your own residence, up to 1 residence in a calendar year, and does not waive building, septic, driveway or other permits10.
What should you check before buying land in Miller County?
Start with wastewater feasibility, flood exposure, legal access, road responsibility, utilities, and city-boundary status. Only 6.9% of Miller County soils avoid severe conventional-drain-field limits, so a favorable-looking lot still needs an early septic evaluation13. County floodplain development rules could not be confirmed from the supplied county facts, so ask the County Judge's Office which floodplain administrator and permit process apply to the parcel7.
For access onto a state highway, work in the highway right-of-way cannot begin until the District Engineer issues a permit24. Miller County's effective property-tax rate is about 0.6%, and the median annual property-tax bill is $9162526. The county averages 51.7 inches of precipitation annually, another reason to inspect drainage and all-weather access in person27.
Watch-outs
- Miller County currently has no planning board, but that does not by itself answer zoning, setback, or minimum-size questions for a particular unincorporated parcel7.
- Septic rules apply to every address in Miller County, including inside Texarkana, and a sewer within 300 feet that you can reach without crossing another owner's land must be used instead of a septic system9.
- The private-land RV and tiny-home occupancy rules could not be confirmed; the state rule governs qualifying paid parks, not a lone unit on private acreage11.
Sources
- Miller County, Arkansas official website (2026 county census)
- Home Improvement Contractor License Application (Arkansas statewide rule), quoted and re-checked
- Texarkana: Sec. 50-165. Recreational vehicle (RV) parks (Miller County), quoted and re-checked
- Texarkana: Planning and Zoning (Miller County), quoted and re-checked
- Rules Pertaining to Onsite Wastewater Systems (2024), quoted and re-checked
- (2026 county census)
- Miller County Judge's Office (millercountyar.gov)
- Rules Pertaining to Onsite Wastewater Systems (2024), quoted and re-checked
- Rules Pertaining to Onsite Wastewater Systems (2024), quoted and re-checked
- Residential Contractors Committee Rules, quoted and re-checked
- 20 CAR § 138-102. Compliance (Arkansas statewide rule), quoted and re-checked
- 20 CAR § 138-101. Definitions (Arkansas statewide rule), quoted and re-checked
- 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
- State of Arkansas Home Improvement New Application, quoted and re-checked
- 2021 Arkansas Fire Prevention Code (Arkansas statewide rule), quoted and re-checked
- Texarkana: Onsite Wastewater (Miller County), quoted and re-checked
- Miller County 911 Address Authority (millercountyar.gov)
- arkleg.state.ar.us (Arkansas statewide rule), quoted and re-checked
- Arkansas Department of Health, Onsite Wastewater Program (healthy.arkansas.gov)
- Rules Pertaining to Onsite Wastewater Systems (2024), quoted and re-checked
- Rules Pertaining to Onsite Wastewater Systems (2024), quoted and re-checked
- Rules Pertaining to Onsite Wastewater Systems (2024) (Arkansas statewide rule), quoted and re-checked
- Rules Pertaining to Onsite Wastewater Systems (2024), quoted and re-checked
- Regulations: Rules for Access Driveways to State Highways (Arkansas statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
Written October 16, 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.