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

Yes. A county permit is required for construction, enlargement, alteration, repair, movement, demolition or a change of occupancy in unincorporated Montrose County¹. The county has adopted the 2018 International Residential, Building and Energy Conservation codes¹. Fire-code enforcement belongs to the applicable local fire protection district, while Colorado handles electrical and plumbing permits and codes¹.

Montrose County administers building-code inspections, including inspection requirements for specified construction stages and some engineer-certified work³. New habitable structures require a foundation completion statement before framing inspection and a Certificate of Occupancy or Certificate of Use; a manufactured home cannot be used until final inspection produces a Certificate of Use¹.

One-story detached accessory structures used for storage or similar purposes may be exempt when the floor area is no more than 200 square feet, the overhang is no more than 24 inches and the highest point is no more than 12 feet above grade¹. Work started before a permit is issued costs an additional fee equal to the building permit fee, and plan review adds 65 percent of the building permit fee when plans are required¹.

Montrose County Planning & Development is the starting point for building permits in unincorporated Montrose County³. The office is at 63160 LaSalle Road in Montrose and can be reached at 970-249-6688³. Its Building Department performs plan review, inspections and code enforcement, while its Planning Department processes land-use applications under county zoning and subdivision regulations³.

Applicants can use the Citizen Permit Portal to review public building-permit reports and apply for building permits and planning applications^3,11. Access and addressing applications must come before the county can issue a building permit for a one- or two-family dwelling³. The county building codes apply specifically to unincorporated Montrose County¹. Inside the Town of Nucla, the town requires building permits for all construction, including manufactured home installation⁴. We could not confirm who issues building permits inside the City of Montrose, so ask the city before filing with the county. Septic permits do not move to a town: the county Board of Health covers municipalities unless one maintains its own public health agency⁶.

Yes. Montrose County administers zoning in unincorporated areas². Municipal zoning is administered by the municipality, and both the City of Montrose and the Town of Nucla set their own zoning^5,12. The county publishes agricultural, residential, commercial, industrial, public-lands and planned-development districts, with uses allowed by right or by special-use permit depending on the district table⁷.

A dwelling unit subject to the county building code must contain at least 300 square feet and provide permanent facilities for living, sleeping, eating, cooking and sanitation¹. That minimum does not settle setbacks, lot coverage or whether a particular dwelling type is permitted on a parcel; ask Planning & Development to identify the district and applicable dimensional and use standards³. General Agricultural and General Residential lots using a septic system need 1 contiguous acre, and General Residential lots on public water and sewer need 10,000 square feet for a single-family home². Residential buildings in General Residential and Manufactured Home Park Residential districts are capped at 35 feet, while General Agricultural lists no height limit². Accessory dwelling units are allowed in the General Agricultural and General Residential districts, and the county FAQ states that General Agricultural lots need at least 1 acre for one². Dividing land also triggers county subdivision, health, zoning and road standards, with formal review and approval required for minor subdivisions¹³. To be eligible, a property needs direct frontage on a county road, access to potable water and the minimum lot size; minor subdivisions take roughly three months from submittal¹⁴.

Montrose County Planning & Development reviews and approves onsite wastewater treatment systems, commonly called septic systems⁶. A permit is required to install a new system or alter, repair, replace or expand one, and work cannot begin until the Health Officer approves commencement⁸. A final county inspection must occur before backfilling, and an OWTS serving a building must receive final approval before an occupancy permit⁸.

New OWTS lots generally must contain at least 1 acre; legally created older lots below 1 acre may need a variance⁸. Connection to an allowed sewage treatment works is mandatory when the property is within 400 feet, and the Board of Health may require connection over a greater distance¹⁵. The Board of Health may permit incinerating, composting and chemical toilets, but their use does not reduce the required size of the septic system⁶. Uncontained domestic sewage or effluent cannot be discharged onto the ground or into state waters unless it meets state water-quality standards¹⁵. Only 8.7% of mapped county soils lack severe limitations for a conventional drain field, so investigate septic feasibility early¹⁶.

Unincorporated Montrose County allows only temporary RV occupancy, not permanent living, under the county zoning regulations². While you build a primary residence, an RV may be occupied for up to 12 months, extendable by up to 6 months, but only with an active county building permit and an approved septic system or community sewer connection². One RV may house the owner's guests for up to 90 days in a calendar year, and one RV may be allowed for up to 180 days a year on General Agricultural land of at least 35 acres². Ask Planning & Development to confirm the hookup conditions for your parcel³. County rules separately regulate commercial campgrounds and RV parks, including minimum acreage, space counts and allowed unit types; those standards are separate from the temporary-occupancy rules above⁷.

Montrose County's zoning regulations treat a tiny home on wheels as a recreational vehicle, so it falls under the same temporary-occupancy limits above and cannot be a permanent residence⁷. Colorado-regulated tiny homes intended for long-term living can be approved on a permanent or temporary foundation, but plans need state approval before construction and the home must satisfy local zoning⁹. A manufactured home outside a manufactured home park must sit on a permanent foundation designed by a Colorado-licensed engineer, and it cannot be occupied until a Certificate of Use is issued¹. A dwelling unit under the Montrose County building code must be at least 300 square feet and include permanent living, sleeping, eating, cooking and sanitation facilities¹. Colorado exempts an owner from contractor licensing for repair or maintenance on the owner's own property, but that rule does not create a blanket exemption for building a new home; ask Planning & Development what permits and inspections apply^3,17.

1. Confirm that the site is in unincorporated Montrose County and identify its official zoning district and allowed uses^2,7.
2. Apply for access and addressing before seeking a building permit for a one- or two-family dwelling³. A new, moved or relocated driveway connecting to a county road requires an approved access permit before construction¹⁸.
3. Resolve water early; new groundwater-diverting wells generally require a state permit, and subdivision plans served by wells must include approved state well permits^10,13.
4. Determine whether sewer connection is mandatory; otherwise obtain county OWTS approval^8,15.
5. Submit building and planning applications through the Citizen Permit Portal^3,11.
6. Schedule county building inspections and the OWTS inspection before backfilling, then obtain the applicable occupancy or use certificate before occupying a covered structure^1,3,8.

Start by confirming whether county or municipal zoning governs the parcel, then use the official district map and use table to verify the intended house, accessory structures and occupancy plan^2,3,7. Verify water independently: a new groundwater-diverting well generally requires a Colorado permit, with statutory and basin-specific conditions potentially affecting approval¹⁰.

Treat septic feasibility as a purchase condition because only 8.7% of mapped soils lack severe limitations for conventional drain fields, and new OWTS lots generally need at least 1 acre^8,16. Check mapped flood hazards because development in regulated floodplain areas is subject to standards meeting or exceeding federal minimum criteria¹⁹. Confirm legal access and whether a new or relocated driveway needs a county access permit or a direct state-highway connection needs a state permit^18,20. Finally, budget around an effective property-tax rate of about 0.4% and a median annual property-tax bill of about $1,280¹⁶.