Unincorporated Las Animas County, Colorado requires building permits for construction, and the county Building Department calculates the fee from the project's value12. County zoning also applies outside municipal boundaries, while septic permits come from the Las Animas-Huerfano Counties District Health Department34.
At a glance
- Building permit
- Required for construction in unincorporated Las Animas County1
- Zoning
- County zoning applies outside incorporated municipalities3
- Septic permit
- Required before installing an onsite wastewater treatment system5
- Tiny home
- State-regulated units may serve as long-term housing, but county zoning still controls the site63
- RV living
- Private-land occupancy rules could not be confirmed; ask the county Land Use Office7
- Private well
- A new groundwater-diverting well generally needs a Colorado well permit8
- Floodplain development
- A county permit is required before development begins in a Special Flood Hazard Area9
Who to call
Building permits
Las Animas County Building Department
County building permits, permit-fee determination and building inspections
200 East 1st Street, Room 104, Trinidad, Colorado 81082
Planning & zoning
Las Animas County Land Use Office
Land divisions, subdivisions, rezoning and other land-use applications
200 East 1st Street, Room 104, Trinidad, Colorado 81082
Septic permits
Las Animas-Huerfano Counties District Health Department — OWTS Program
OWTS permits, septic installer licensing and OWTS permit records for Las Animas County
412 Benedicta Avenue, Trinidad, CO 81082
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 Las Animas County, Colorado?
Yes. Unincorporated Las Animas County requires a building permit for construction, and an OWTS permit must be completed before the county issues the building permit when the project needs onsite wastewater treatment1. The Building Department determines the building-permit fee from the stated project value, so obtain that amount before using the payment portal2. The county page also directs plumbing and electrical permits and inspections to the State of Colorado10. Colorado law lets a county except a structure used solely to shelter agricultural implements, farm products, livestock or poultry, but the available county material does not establish that every farm building is exempt11. Ask the Building Department at 719-845-2577 whether the exact scope needs a permit and which plans or inspections apply10.
Who is the Las Animas County building department, and how do you reach it?
The Las Animas County Building Department is at 200 East 1st Street, Room 104, Trinidad, Colorado 81082, and its permit and inspections number is 719-845-257710. The department's page links the building permit, fee information, building guides, an owner-doing-the-work form and the county payment portal10. A project value is needed so staff can determine the fee to enter in the portal2. We could not confirm the legal conditions for acting as an owner-builder or the county's full inspection sequence, so ask the Building Department before committing to that route. For zoning, parcel divisions or rezoning, use the Land Use Office at the same courthouse address and phone number7. Land-use staff recommend an appointment for application review, and incomplete submittals may be refused until every required item arrives together12.
Does Las Animas County have zoning?
Yes. Las Animas County's land-use regulations apply to public and private land and structures in unincorporated Las Animas County, while land inside municipal boundaries is excluded3. Uses and structures must comply with the applicable zoning district, so a rural address alone does not establish that a house, RV, tiny home or accessory use is allowed3. The Land Use Office processes land divisions, subdivisions, rezoning and other land-use cases137. Contact that office at 719-845-2577 to identify the parcel's district and confirm its allowed uses, setbacks and dimensional rules before selecting a building site7. Colorado counties may regulate building location, height, bulk, lot coverage, lot size, open space and land uses through zoning, but that state authority does not supply a single countywide numeric standard for every parcel14.
How do septic permits work in Las Animas County?
The Las Animas-Huerfano Counties District Health Department administers septic, or OWTS, permits in Las Animas County4. An applicant must submit the OWTS permit application and appropriate fee before installing any onsite wastewater treatment system, and contractors or installers must be licensed by the department515. The Las Animas County office is at 412 Benedicta Avenue in Trinidad and can be reached at 719-846-221315. Colorado requires the local OWTS permit before building approval when a structure is not served by a sewage treatment works, followed by final inspection and local approval before occupancy1617. Only 10% of county soils are rated without severe limits for a conventional septic drain field, so make soil and system feasibility an early purchase contingency18.
Can you live in an RV or tiny home on your land in Las Animas County?
We could not confirm a complete Las Animas County rule for long-term RV occupancy or temporary camping on private land. The available Colorado camping rule concerns land controlled by Colorado Parks and Wildlife, so it does not answer whether an RV may be occupied on a private parcel19. Ask the Las Animas County Land Use Office at 719-845-2577 about the parcel's zoning district, temporary-use rules and sanitation requirements before moving an RV onto the property7. Colorado-regulated tiny homes can be approved for long-term living on permanent or temporary foundations, but plans require state approval before construction and the unit still must satisfy local zoning6. In unincorporated Las Animas County, that means county zoning remains part of the answer3. Any occupied structure also needs adequate sanitary sewage disposal, and a permitted OWTS is one allowed route where sewer service is unavailable20.
Building a home in Las Animas County: the steps, in order
- Ask the Land Use Office to identify the zoning district, allowed residential use and parcel-specific siting rules37.
- Verify water: every new groundwater-diverting well in Colorado generally needs a Division of Water Resources permit, subject to statutory and basin-specific rules8.
- Establish septic feasibility and obtain the district OWTS permit before county building approval when sewage-treatment service is unavailable516.
- Prepare the building application and project value, then ask the Building Department to calculate the fee before paying through the portal210.
- Confirm the required building inspections with the county and route plumbing and electrical permits and inspections through the State of Colorado10.
- Complete the OWTS final inspection and secure local approval before occupancy when the home is not served by a sewage treatment works17.
What should you check before buying land in Las Animas County, Colorado?
Start with zoning and septic. County zoning applies throughout unincorporated Las Animas County, and only 10% of county soils are rated without severe limits for a conventional drain field318. Check the flood map before siting improvements because a Floodplain Development Permit is required before development begins in a Special Flood Hazard Area9. Verify a legal water source because a new groundwater-diverting well generally needs a state permit and may face basin-specific conditions8. If a home will connect directly to a state highway, obtain a Colorado Department of Transportation access permit21. Confirm recorded access and ownership around the parcel because federal land accounts for 11.1% of the county22. Finally, budget for a median annual property-tax bill of about $524 and an effective property-tax rate of about 0.2%2324.
Watch-outs
- An OWTS permit must be completed before Las Animas County issues a building permit for a project that needs onsite wastewater treatment1.
- Only 10% of Las Animas County soils are rated without severe limits for a conventional septic drain field, so do not assume a conventional system will fit the parcel18.
- Private-land RV occupancy remains unconfirmed; ask the Las Animas County Land Use Office about the exact parcel and proposed use7.
Sources
- Las Animas County Building Department (2026 county census)
- Building Department, quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- On-Site Wastewater Treatment Systems (OWTS) Program, quoted and re-checked
- On-Site Wastewater Treatment Systems (OWTS) Program, quoted and re-checked
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- Las Animas County Land Use Office (lasanimascounty.colorado.gov)
- Water Administration (Colorado statewide rule), quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Las Animas County Building Department (lasanimascounty.colorado.gov)
- Colorado Revised Statutes 2025 Title 30 Government - County (Colorado statewide rule), quoted and re-checked
- Land Use - Special Events Permit Application, quoted and re-checked
- Land Use - Special Events Permit Application, quoted and re-checked
- Colorado Revised Statutes 2025 Title 30 Government - County (Colorado statewide rule), quoted and re-checked
- Las Animas-Huerfano Counties District Health Department — OWTS Program (la-h-health.colorado.gov)
- Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
- Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Title 33 - Parks and Wildlife - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
- Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
- Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
- Federal land share: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Effective property tax rate: 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.