Unincorporated Dallam County, Texas does not require a general county building permit and has no county zoning1. Inside Dalhart, the city handles building permits and zoning; Dallam County remains the septic permitting authority2,3,4.
Do you need a building permit in Dallam County, Texas?
An ordinary home on unincorporated Dallam County land does not require a general county building permit.
An ordinary home on unincorporated Dallam County land does not require a general county building permit1. Septic work normally requires a permit and approved plan, while dividing land may trigger plat review8,10. Industrialized housing remains subject to the Texas installation-permit program11. Inside Dalhart, the city handles building permits; submit plans to the Inspector at City Hall or by email, compliant with the 2015 International Building Codes2,12. Dalhart lists new residential building permits at $0.15 per square foot, with a $100 minimum; septic permitting stays with Dallam County4,12.
Who is the Dallam County building department, and how do you reach it?
For unincorporated Dallam County construction, start with the County Judge’s Office and ask for the current building-inspection, occupancy-document and septic application contacts.
For unincorporated Dallam County construction, start with the County Judge’s Office and ask for the current building-inspection, occupancy-document and septic application contacts13. We could not confirm a county building-inspection or certificate-of-occupancy program; ask before construction13. For a subdivision, submit the plat to the Dallam County Judge for review, then request placement on a regular Commissioners Court meeting agenda after the Judge’s approval8. A subdivision within a city’s extraterritorial jurisdiction also needs the relevant city’s approval before final county approval8.
Does Dallam County have zoning?
Unincorporated Dallam County has no county zoning.
Unincorporated Dallam County has no county zoning1. Dallam County has no zoning-based restriction on RV occupancy, tiny homes, temporary camping, minimum dwelling or lot size, building height or accessory dwellings5. Subdivision rules still require vehicle-access points and building setback lines on plats, with a 30-foot setback measured from the convergence of bordering road edges or curb lines on corner lots8. Inside Dalhart, uses and structures must meet the city’s zoning-district rules; septic permitting remains with Dallam County3,4. Dalhart manufactured homes need Planning and Zoning Board approval before placement and may require Special Use zoning; ask the city Code Department about that process12.
How do septic permits work in Dallam County?
Dallam County is the authorized agent that reviews OSSF applications, conducts inspections, investigates complaints and administers the local septic program.
Dallam County is the authorized agent that reviews OSSF applications, conducts inspections, investigates complaints and administers the local septic program4. A permit and approved plan are normally required to construct, install, alter, extend or repair an OSSF10. A narrow exemption may apply to a single-family tract of at least 10 acres if every condition is met, including professional site evaluation and at least 100 feet between every system component and the property line10. About 80.8% of county soils are rated without severe limits for a conventional drain field14. The county's day-to-day application contact and fee schedule are not identified, so ask the County Judge's Office13,15.
Can you live in an RV or tiny home on your land in Dallam County?
For an RV or tiny home on unincorporated Dallam County land, plan sanitation before moving in: dwellings, trailers and mobile homes on subdivision lots or ranchettes must connect to septic or disposal facilities meeting state specifications.
For an RV or tiny home on unincorporated Dallam County land, plan sanitation before moving in: dwellings, trailers and mobile homes on subdivision lots or ranchettes must connect to septic or disposal facilities meeting state specifications6. Inside Dalhart, manufactured homes require Planning and Zoning Board approval and may need Special Use zoning12. Dalhart also requires a city building-inspector permit to construct, alter, extend or expand a manufactured-home park or RV park; that park rule does not answer occupancy of an individual RV on private land2. Ask the County Judge’s Office about unincorporated occupancy documents before moving in13.
Building a home in Dallam County: the steps, in order
Confirm whether the parcel is inside Dalhart; the city applies building codes and zoning within its boundaries.
- Confirm whether the parcel is inside Dalhart; the city applies building codes and zoning within its boundaries3,12.
- If land is being divided, determine whether platting applies; qualifying agricultural, farm, ranch, wildlife-management or timber-production divisions may be exempt only while the stated conditions and qualifying use continue8,9.
- If a plat is required, submit it to the Dallam County Judge before seeking Commissioners Court approval8.
What should you check before buying land in Dallam County?
Verify legal access, plat status, city limits, deed restrictions, flood exposure, water supply and the proposed septic area before closing.
Verify legal access, plat status, city limits, deed restrictions, flood exposure, water supply and the proposed septic area before closing. Subdivided land cannot be conveyed until Commissioners Court approval and recording, subject to statutory exceptions8. A corner subdivision lot carries a 30-foot setback at intersecting roads, and dead-end subdivision roads may need a cul-de-sac with a 50-foot right-of-way radius and driveway access to adjoining lots8. Dallam County averages about 16.1 inches of precipitation, and severe drought occurs in about 39.1% of years14. We could not confirm private-well requirements countywide; ask the County Judge’s Office which groundwater authority serves the parcel13.
Watch-outs
- We could not confirm a building-inspection or certificate-of-occupancy program for unincorporated Dallam County; ask the County Judge’s Office13.
- Dallam County is the OSSF permitting authority, but the day-to-day application office and fee schedule could not be confirmed; ask the County Judge's Office13,17.
- An agricultural land division loses its plat exception if the tract stops being used primarily for a qualifying agricultural, farm, ranch, wildlife-management or timber-production use9.
Sources
17 official pages, each quoted and re-checked · written October 11, 2026
- Dallam County Subdivision Regulations 2025 (2026 county census)
- Dalhart: Code of Ordinances, Sec. 24-5, Manufactured home park and recreational vehicle park permits (Dallam County)
- Dalhart: Dalhart Code of Ordinances, Sec. 40-4, Specific purposes of districts (Dallam County)
- 2024 Systems Authorized by Authorized Agents
- Texas law on county zoning and building authority
- Dallam County Revised 2025 Subdivision Regulations
- Exemptions to Electrician Licensing (Texas statewide rule)
- Dallam County Revised 2025 Subdivision Regulations
- Texas Local Government Code, Section 232.0015
- Getting a Permit for an OSSF - Such as a Septic System
- tdlr.texas.gov (Texas statewide rule)
- Code Department
- Dallam County Judge's Office (dallam.org)
- 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
- Types of Systems Installed by Time Period — 2025 Systems Authorized by Authorized Agents
- Section 4: Driveway Permits, Design, and Materials (Texas statewide rule)
- tceq.texas.gov
Written October 11, 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.
Off-grid gear
Going off-grid in Dallam 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.
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