Building permits, zoning and land rules in Ouray County, Colorado

Unincorporated Ouray County requires a building permit for every structure with habitable space, regardless of size¹. Tool sheds and other premanufactured buildings of 200–499 square feet also need a building permit, though not an engineered foundation¹. Certain agricultural structures qualify for an exception only on at least 35 acres outside a subdivision, with agricultural tax status and exclusively agricultural use; mining claims above 9,480 feet need direct inquiry to Land Use¹. Ouray County has re-adopted the 2018 International Building Code and International Energy Conservation Code¹⁴. Colorado allows limited license exemptions for owners personally doing electrical or plumbing work on their own property; rental properties are excluded, electrical work excludes property generally open to the public, and plumbing work excludes commercial or industrial buildings^9,10. Qualifying homeowners still need electrical or plumbing permits before work begins, and county building inspections and occupancy approval remain required^11,15.

The Ouray County Land Use & Planning Department handles county building permits, planning and zoning at 111 Mall Road, Ridgway; call 970-626-9775². Submit building and septic applications through CloudPermit with PDF plans; paper applications are not accepted⁴. Ask Land Use for a valid fee estimate: published building-fee schedules are estimates, and separate plan-check, address, site-development, septic and road-impact charges may apply^14,16. Inside the City of Ouray, the city handles residential building permits and requires site-development approval first; septic permits remain with Ouray County Land Use^17,18,19. Building projects require staged inspections, with foundation inspections performed by a Colorado-registered professional engineer at the permittee’s expense and state electrical and plumbing inspections scheduled separately¹⁴. Request building inspections at least 24 hours ahead; occupancy requires a Certificate of Occupancy after required inspections and corrections^11,16.

Unincorporated Ouray County has eight zoning districts; uses may be allowed by right or require a special-use permit, and new structures may need site-development approval^5,20. Inside the City of Ouray, city zoning governs uses and dimensions; septic permits remain with Ouray County Land Use^18,19,21. The recorded Official Zoning Map controls if the code copy conflicts; county overlay districts include Ridgway UGMA, Ridgway AOI, Ouray UGMA and Ouray AOI²⁰. Rural districts commonly require 35 acres, while Colona allows a 6,000-square-foot minimum buildable lot; district exceptions apply⁵. Colona also limits the floor-to-lot ratio to 1:1⁵. Buildings are generally capped at 35 feet, with stricter High Alpine rules or different approved permit terms possible⁵. For parcels of 2 acres or less under Section 3.8H2, side and rear setbacks are 10 feet and the front setback is 25 feet; structures must also be at least 100 feet from the centerline of U.S. Highway 550 or Colorado Highway 62⁵. Ask Land Use which district, overlays and setbacks govern the parcel before drawing a site plan^2,5,20.

The Ouray County Land Use Department administers county septic permits separately from building permits and zoning approval^2,19. A septic permit is required before installing, altering, expanding or repairing an onsite wastewater treatment system; plans must be stamped by a Colorado-licensed professional engineer³. The current application fee is $365, and the tank or soil treatment area must be 50 feet from a lake, water course, irrigation ditch, stream or wetland⁶. Give Land Use at least 48 hours' notice for septic-tank and soil-treatment-area inspections, and have the design engineer inspect the complete system before backfill³. Incinerating, composting and chemical toilets may require local Board of Health approval, but they do not reduce the required engineered wastewater-system size²². Only 4.8% of county soils are rated without severe limitations for a conventional drain field, so make wastewater feasibility an early purchase contingency²³.

Ouray County provides a long-term-camping application through CloudPermit, but we could not confirm the complete private-land RV occupancy limits; ask Land Use about the parcel, setup and length of stay^2,4. Ouray County defines a tiny home as a dwelling of 800 square feet or less, excluding lofts⁷. A tiny home used as a dwelling in unincorporated Ouray County needs a building permit and an engineered foundation regardless of size^1,24. Full-time occupancy or a frame or axles triggers the county’s permanent engineered-foundation requirement, with the frame or axles removed⁷. A dwelling must have a complete kitchen and bathroom, adequate water, sewage and heat, and at least one room of 70 square feet, with no horizontal dimension under 7 feet except in a kitchen⁸. Tiny homes must meet the county’s dwelling standards and obtain a Certificate of Occupancy before move-in⁸.

1. Ask Land Use to confirm the zoning district, allowed use, lot size, setbacks, building height and any site-development review^2,5,20.

1. Confirm driveway requirements with Road & Bridge²⁵. A first improvement, new driveway or new single-family home requires an Address and Driveway Permit Application¹³.

1. Establish water and wastewater service; a planned development may use an approved provider, qualifying well, central sewer or compliant onsite system²⁶.

1. Obtain the septic permit before installing or changing an onsite system⁶.

1. Submit building and septic plans as PDFs through CloudPermit; paper applications are not accepted⁴.

1. Arrange the county site inspection before excavation or construction, then schedule building and septic inspections; keep the septic system open until inspected^11,13.

1. Complete corrections and obtain the Certificate of Occupancy before moving into the building¹¹.

Confirm zoning, access, water, wastewater and flood exposure before treating a parcel as buildable^13,20,27. County site inspection includes floodplain and geological-hazard review where applicable, and the county provides a separate floodplain permit application¹¹. Only 46.5% of county land has a slope of 15% or less, and 68.8% is forested²³. New groundwater wells generally need a state permit, subject to exceptions and basin rules¹². Planned developments and subdivisions undergo county review for zoning, roads, water, wastewater and access²⁸. A planned unit development using onsite wastewater generally needs at least one acre per lot, making early wastewater review especially important²⁶. A short-term rental in unincorporated Ouray County requires prior approval from Land Use; permits are limited, so confirm availability before counting on rental income^2,29.