Unincorporated Las Animas County, Colorado requires building permits, and construction must follow the building codes the county has adopted.12 County zoning applies throughout the unincorporated county but not inside municipal boundaries.3 Septic permits are separate: they come from the bi-county Las Animas-Huerfano Counties District Health Department.4
At a glance
- Building permit
- Required for construction in unincorporated Las Animas County1
- Zoning
- County zoning applies outside incorporated municipalities5
- Septic permit
- Required before installing an onsite wastewater treatment system6
- Tiny home
- Homes in the listed residential districts must be at least 600 square feet, except permitted mobile homes7
- RV living
- More than 7 days in any 30-day period requires a temporary-use permit8
- Private well
- A new groundwater-diverting well generally needs a Colorado well permit9
- Floodplain development
- A county permit is required before development begins in a Special Flood Hazard Area10
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 (septic) permits, installer licensing, transfer-of-title requirements 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 October 9, 2026.
Off-grid gear
Going off-grid in Las Animas 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 Las Animas County, Colorado?
Yes. Unincorporated Las Animas County requires a building permit for construction, and buildings, structures and land improvements must follow the building codes adopted by the county12. The available county material does not identify the complete current code family or edition, so ask the Building Department which code applies to the proposed work. Building-permit fees vary with the project value supplied to the department11. The county directs plumbing and electrical permits and inspections to the State of Colorado12. For a site without sewer service, the septic permit must be completed before a building permit is issued.1 Ask the Building Department at 719-845-2577 which plans and county inspections apply to the exact project13.
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 719-845-257713. The county provides a building-permit form, fee information, an owner-doing-the-work form, a contractor-license application and land-use regulations12. Provide the project value so staff can determine the variable building-permit fee before payment11. We could not confirm the legal conditions for acting as an owner-builder or the general inspection sequence, so ask the Building Department before choosing that route. The confirmed county inspection rule applies only to completed improvements in mobile-home parks and campgrounds before a site is occupied14. For land divisions, subdivisions, rezoning or other land-use cases, use the Land Use Office15.
Does Las Animas County have zoning?
Yes. Las Animas County's zoning and land-use regulations apply to public and private land and structures in unincorporated Las Animas County, but exclude land inside municipal boundaries, where the municipality's own rules govern.3 Septic permits for those municipal addresses still come from the district health department, not the city.6 The standard districts are Agricultural, Rural Residential, Urban Residential and Ranchette, with an Airport Protection Overlay also available16. Rules vary sharply by district: minimum lots range from 7,500 square feet in Urban Residential to 35 acres in Agricultural, while maximum lot coverage ranges from 15% to 50%1718. The listed residential districts generally require at least 600 square feet of dwelling area, except for mobile homes where permitted7. Front, side and rear setbacks and maximum building heights also differ by district1920. Ask the Land Use Office to identify the parcel's district and overlay before designing the site21.
How do septic permits work in Las Animas County?
The bi-county Las Animas-Huerfano Counties District Health Department permits septic installation, repair and use in Las Animas County4. Submit the OWTS application and appropriate fee before installing any onsite wastewater treatment system, and use an installer licensed by the department.622 The Las Animas County office is at 412 Benedicta Avenue in Trinidad and can be reached at 719-846-221322. The county may not issue a building permit until it determines that adequate water, sewer and electrical supplies are available at the site; that rule establishes adequacy, not a universal requirement to connect to public utilities23. 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 contingency24. Colorado's septic transfer-of-title requirements begin October 12, 2026 for certain property transfers involving an OWTS, so ask the health department how they affect a purchase.22
Can you live in an RV or tiny home on your land in Las Animas County?
In unincorporated Las Animas County, occupying a tent, camper or RV for more than 7 days, consecutive or not, within any 30-day period is presumed to be a temporary residence and requires a temporary-use permit8. The permit lasts 30 days in Agricultural and Rural Residential districts and 15 days in Urban Residential districts, subject to renewal requirements8. A campground is different: it requires special-use approval in an allowable district, and a camping unit may not occupy a campground space for more than 6 months25. For a tiny home, the listed residential districts set a 600-square-foot minimum dwelling size, except for mobile homes where permitted7. Colorado-regulated tiny homes may qualify for long-term housing, but state plan approval does not displace county zoning263.
What are the steps to build a home in Las Animas County?
- Ask the Land Use Office to identify the zoning district, overlays, allowed residential use, lot minimum, setbacks, coverage and height limit1617191820.
- If the project divides land, take it to the Land Use Office; if the parcel is in a subdivision or proposed subdivision, confirm that the final plat has been approved and recorded before seeking a building permit1527.
- Verify water and establish septic feasibility; the county must find adequate water, sewer and electrical supplies before issuing the building permit23.
- Submit the OWTS application and fee to the district health department before septic installation46.
- Prepare the building application and project value, then have the Building Department determine the variable fee before payment1113.
- Route plumbing and electrical permits and inspections through the State of Colorado, and ask the county which general building inspections apply1213.
What should you check before buying land in Las Animas County, Colorado?
Start with the zoning map, legal lot status and septic feasibility. County zoning applies throughout unincorporated Las Animas County, and only 10% of county soils are rated without severe limits for a conventional drain field324. A subdivision or proposed subdivision needs an approved, recorded final plat before a building permit may issue27. Check flood status before siting improvements because development in a Special Flood Hazard Area requires a permit; where FEMA has not defined the hazard area, the county requires development permits so it can determine flood exposure28. Verify legal water, sewage, electrical service and recorded access before closing23. The county access rule found for mobile-home and campground spaces requires direct public-road access and qualifying access roads, but it does not establish a general driveway permit for every parcel29.
Watch-outs
- Las Animas County must find adequate water, sewer and electrical supplies on the site before issuing a building permit23.
- 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 parcel24.
- Using a tent, camper or RV as a temporary residence beyond 7 days in any 30-day period requires a temporary-use permit8.
- Beginning October 12, 2026, certain property transfers involving a septic system are subject to transfer-of-title requirements administered by the district health department.22
Sources
- Las Animas County Building Department (2026 county census)
- Las Animas County Land Use Regulations, §1.12 Building Codes, 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
- Las Animas County Land Use Regulations, quoted and re-checked
- On-Site Wastewater Treatment Systems (OWTS) Program, quoted and re-checked
- Las Animas County Land Use Regulations, §3.02.02, quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Water Administration (Colorado statewide rule), quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Building Department, quoted and re-checked
- Building Department, quoted and re-checked
- Las Animas County Building Department (lasanimascounty.colorado.gov)
- Las Animas County Land Use Regulations, Chapter VIII, quoted and re-checked
- Land Use - Special Events Permit Application, quoted and re-checked
- Las Animas County Land Use Regulations, §§3.02.01–3.02.02, quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Las Animas County Land Use Regulations, §3.02.02, quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Las Animas County Land Use Office (lasanimascounty.colorado.gov)
- Las Animas-Huerfano Counties District Health Department — OWTS Program (la-h-health.colorado.gov)
- Las Animas County Land Use Regulations, 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
- Las Animas County Land Use Regulations, quoted and re-checked
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
- Las Animas County Land Use Regulations, quoted and re-checked
Written October 9, 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.