Unincorporated Conejos County, Colorado requires a construction permit for new construction, including installation of a mobile or manufactured home1. County zoning also applies, and the Land Use Office handles building permits, land-use applications and the onsite wastewater treatment system program23. RV occupancy is limited to temporary travel, recreation or vacation use, while septic systems require county approval and inspections456.
At a glance
- Building permit
- Required for new construction in unincorporated Conejos County, including mobile or manufactured home installation1
- Building codes
- The county requires the 2018 residential/building and energy conservation codes7
- Zoning
- Yes; district and overlay rules apply in unincorporated areas28
- Septic (OWTS)
- The County Land Use Office requires a permit, inspection and approval596
- RV living
- Long-term dwelling use is prohibited; temporary travel, recreation or vacation use is the stated exception410
- Tiny home
- State approval supports long-term occupancy, but county zoning and permits still apply111
- Owner-builder exemption
- No general exemption was confirmed; ask the Land Use Office before relying on one12
- Well
- Every new groundwater-diverting well needs a state well permit, subject to exceptions and basin rules13
Who to call
Building permits
Conejos County Land Use Office
Building permits, zoning and land-use applications, subdivisions, and OWTS (septic) administration in unincorporated Conejos County
PO Box 157, 6683 County Road 13, Conejos, CO 81129
Contact details are copied from each office’s official page and were checked against it on September 29, 2026.
Do you need a building permit in Conejos County, Colorado?
Yes. New construction in unincorporated Conejos County requires a construction permit, including installation of a mobile or manufactured home1. Permitted buildings must meet the 2018 residential/building and energy conservation codes7. Inspections are required through each phase of construction, including a final inspection before occupancy14. A construction permit is valid for one year and may lapse after 12 continuous months without construction1. Specified agricultural activities in Agricultural zoning areas can be exempt from a land-use permit, but that exemption does not remove construction-permit requirements or other applicable rules1516. Ask the Land Use Office to confirm whether a particular repair, accessory structure or farm project qualifies before starting.
Who issues permits in Conejos County, Colorado?
The Conejos County Land Use Office processes building permits and land-use matters in unincorporated Conejos County3. The same office manages the county's OWTS, or septic, program53. Incorporated towns are separate municipalities with their own rules, so first confirm which jurisdiction contains the parcel3. The office also administers divisions of land, boundary changes, lot consolidations, subdivisions, rezoning, special uses and variances17. The county's published process routes property-access, construction and OWTS applications through the appropriate county offices1819. No general owner-builder exemption was confirmed, so owners doing their own work should ask the Land Use Office what plans and inspections apply12.
Does Conejos County have zoning?
Yes. Conejos County zoning covers unincorporated land through Agricultural, Rural, Residential, Community/Townsite, Commercial and Industrial districts, plus Riparian Protection and Floodplain overlays2820. Agricultural and Rural districts have a one-acre minimum lot area and 40-foot front, side and rear setbacks2122. Maximum height is 45 feet in the Agricultural district and 35 feet in the Rural district; Rural-district buildings may cover no more than 20% of the lot2324. These standards are district-specific, not countywide. We could not confirm a minimum dwelling floor area, so ask the Land Use Office about the parcel's district and proposed home. Incorporated towns use their own rules3.
How do septic permits work in Conejos County?
The Conejos County Land Use Office regulates OWTS, or septic, systems under the county Board of Health and state rules5. A permit is required for a new system and applicable alterations or repairs9. The published fee is $325 for a new system and $200 for an alteration or repair, with double fees when installation begins without a permit9. Installation inspections require 24-hour notice, and an engineered system needs approval from both the design engineer and County Inspector6. A home cannot be occupied without an approved wastewater system; cesspools and outhouses are prohibited25. Where public sewer or a sanitation district is available, an applicant must make reasonable documented efforts to connect and use that system exclusively26. Only 14.8% of county soils avoid severe conventional-drain-field limits, so test feasibility early27.
Can you live in an RV or tiny home in Conejos County?
Unincorporated Conejos County limits an RV dwelling to temporary travel, recreation or vacation use and prohibits RV or tent use within a Residential district410. An RV cannot serve as storage or an accessory structure, and an RV park or campground requires special-use review and a land-use permit410. Colorado permits a Division of Housing-approved tiny home for long-term living, but county zoning still controls placement11. We could not confirm a county rule specifically for tiny-home occupancy or a minimum dwelling size, so take the plans and parcel number to the Land Use Office before buying. A manufactured or mobile home requires a Land Use Construction Permit in unincorporated Conejos County28.
How do you build a home in Conejos County?
- Confirm that the parcel is unincorporated and ask the Land Use Office for its zoning district and overlays320.
- Obtain safe, conforming access; the county publishes a $100 access-permit fee18.
- Obtain the physical address; the $50 application fee includes an approved reflective address sign29.
- Arrange the soil evaluation and apply through the Colorado Division of Water Resources if a new well will supply the home1930.
- Submit complete construction drawings and the construction-permit application19.
What should you check before buying land in Conejos County?
Confirm zoning, lot size, setbacks, legal access and whether a proposed land division needs county review before the due-diligence period ends21221817. Development in an identified floodplain must follow county land-use and building provisions plus applicable federal minimum standards31. Check well-permit feasibility with the Colorado Division of Water Resources30. Test septic feasibility early because only 14.8% of county soils avoid severe limits for a conventional drain field27. Conejos County averages 17.3 inches of precipitation and has experienced severe drought in about 31.6% of years, so secure a dependable water plan3233. About 60% of the county is federal land, making ownership, access and boundary verification essential34.
Watch-outs
- Conejos County limits RV dwelling use to temporary travel, recreation or vacation and prohibits RV or tent use within a Residential district410.
- A home may not be occupied without a county- and state-approved septic system, and cesspools and outhouses are prohibited25.
- An agricultural land-use-permit exemption does not remove construction-permit requirements or other applicable rules16.
- No general owner-builder exemption, county tiny-home occupancy rule or minimum dwelling floor area was confirmed; ask the Conejos County Land Use Office about the proposed project and parcel before purchase123.
Sources
- Conejos County Land Use Code, quoted and re-checked
- Land Use | Conejos County, quoted and re-checked
- Conejos County Land Use Office (conejoscounty.colorado.gov)
- Conejos County Land Use Code, quoted and re-checked
- Land Use | Conejos County, quoted and re-checked
- Land Use | Conejos County, quoted and re-checked
- Land Use | Conejos County, quoted and re-checked
- Conejos County Land Use Code, quoted and re-checked
- Land Use | Conejos County, quoted and re-checked
- Conejos County Land Use Code, quoted and re-checked
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- (2026 county census)
- Water Administration (Colorado statewide rule), quoted and re-checked
- Land Use | Conejos County, quoted and re-checked
- 2005 Conejos County Land Use Code, quoted and re-checked
- Conejos County Land Use Code, quoted and re-checked
- Land Use | Conejos County, quoted and re-checked
- Land Use Step by Step Building/Construction Process, quoted and re-checked
- Land Use Step by Step Building/Construction Process, quoted and re-checked
- Conejos County Land Use Code, quoted and re-checked
- 2005 Conejos County Land Use Code, quoted and re-checked
- 2005 Conejos County Land Use Code, quoted and re-checked
- 2005 Conejos County Land Use Code, quoted and re-checked
- 2005 Conejos County Land Use Code, quoted and re-checked
- Land Use Step by Step Building/Construction Process, quoted and re-checked
- Conejos County Land Use Code, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- 2005 Conejos County Land Use Code, quoted and re-checked
- Land Use Step by Step Building/Construction Process, quoted and re-checked
- Land Use Step by Step Building/Construction Process, quoted and re-checked
- 2005 Conejos County Land Use Code, quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Federal land share: Bolthole Index county data
Written September 29, 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.