Bolthole Index

Montrose County, Colorado

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

58Index Score / 100
#21 of 64 in Colorado

Unincorporated Montrose County, Colorado requires building permits for construction, enlargement, alteration, repair, movement, demolition and changes of occupancy, and county zoning also applies12. Planning & Development issues building permits and runs zoning there3; inside the Town of Nucla the town issues its own building permits and sets zoning45. Septic systems are reviewed by the same county office under the Board of Health, except in any municipality with its own public health agency6.

At a glance

Building permit
Required for residential construction in unincorporated areas1
Building code
County adopted the 2018 IRC and IBC7
Zoning
Yes in unincorporated areas; districts and use tables are published289
Septic
County permit, approval and final inspection required for covered OWTS work61011
Tiny home
State approval and applicable county zoning requirements apply1213
RV living
Temporary only: 12 months while building with a permit and septic, 90 days for guests, 180 days on 35+ acre agricultural land14
Water well
New groundwater-diverting wells generally require a state permit15
Minimum home size
At least 300 square feet for a dwelling unit16

Who to call

Building permits

Montrose County Planning & Development

Building permits, plan review, inspections, code enforcement, planning applications, zoning questions and onsite wastewater treatment system review and approval

970-249-6688

63160 LaSalle Road, Montrose, CO 81401

Online permits →

Roads & driveways

Montrose County Public Works

Right-of-way permits and county-road permit documents

970-249-5424

63160 LaSalle Rd, Montrose, CO 81401

Contact details are copied from each office’s official page and were checked against it on October 16, 2026.

Off-grid gear

Going off-grid in Montrose County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit 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 County.1 The county has adopted the 2018 International Residential, Building and Energy Conservation codes.7 Fire-code enforcement belongs to the applicable local fire protection district, while Colorado handles electrical and plumbing permits and codes.7

Montrose County administers building-code inspections, including inspection requirements for specified construction stages and some engineer-certified work.17 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 Use.18

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 grade19. 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 required19.

Who issues building permits in Montrose County?

Montrose County Planning & Development is the starting point for building permits in unincorporated Montrose County.3 The office is at 63160 LaSalle Road in Montrose and can be reached at 970-249-6688.3 Its Building Department performs plan review, inspections and code enforcement, while its Planning Department processes land-use applications under county zoning and subdivision regulations.3

Applicants can use the Citizen Permit Portal to review public building-permit reports and apply for building permits and planning applications.203 Access and addressing applications must come before the county can issue a building permit for a one- or two-family dwelling.21 The county building codes apply specifically to unincorporated Montrose County.22 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 agency.6

Does Montrose County have zoning?

Yes. Montrose County administers zoning in unincorporated areas.223 Municipal zoning is administered by the municipality, and both the City of Montrose and the Town of Nucla set their own zoning.245 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 table.9

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 sanitation.16 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 standards.3 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 home25. Residential buildings in General Residential and Manufactured Home Park Residential districts are capped at 35 feet, while General Agricultural lists no height limit26. 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 one27. Dividing land also triggers county subdivision, health, zoning and road standards, with formal review and approval required for minor subdivisions.28 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 submittal.29

How do septic permits work in Montrose County?

Montrose County Planning & Development reviews and approves onsite wastewater treatment systems, commonly called septic systems.6 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 commencement.10 A final county inspection must occur before backfilling, and an OWTS serving a building must receive final approval before an occupancy permit.11

New OWTS lots generally must contain at least 1 acre; legally created older lots below 1 acre may need a variance.10 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 distance.30 The Board of Health may permit incinerating, composting and chemical toilets, but their use does not reduce the required size of the septic system31. Uncontained domestic sewage or effluent cannot be discharged onto the ground or into state waters unless it meets state water-quality standards.32 Only 8.7% of mapped county soils lack severe limitations for a conventional drain field, so investigate septic feasibility early.33

Can you live in an RV or tiny home on your land in Montrose County?

Unincorporated Montrose County allows only temporary RV occupancy, not permanent living, under the county zoning regulations14. 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 connection14. 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 acres14. 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 above.34

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 residence35. 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 zoning.12 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 issued36. 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 facilities.16 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.373

Building a home in Montrose County: what are the steps?

  1. Confirm that the site is in unincorporated Montrose County and identify its official zoning district and allowed uses.29
  2. Apply for access and addressing before seeking a building permit for a one- or two-family dwelling.21 A new, moved or relocated driveway connecting to a county road requires an approved access permit before construction.38
  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.1539
  4. Determine whether sewer connection is mandatory; otherwise obtain county OWTS approval.3010
  5. Submit building and planning applications through the Citizen Permit Portal.203
  6. Schedule county building inspections and the OWTS inspection before backfilling, then obtain the applicable occupancy or use certificate before occupying a covered structure.171118

What should you check before buying land in Montrose County?

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.289 Verify water independently: a new groundwater-diverting well generally requires a Colorado permit, with statutory and basin-specific conditions potentially affecting approval.15

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.3310 Check mapped flood hazards because development in regulated floodplain areas is subject to standards meeting or exceeding federal minimum criteria.40 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.3841 Finally, budget around an effective property-tax rate of about 0.4% and a median annual property-tax bill of about $1,280.4243

Watch-outs

  • Do not assume a rural listing is outside zoning: unincorporated Montrose County has published zoning districts and use standards.289
  • Conventional septic suitability is constrained across much of the county, with only 8.7% of mapped soils lacking severe drain-field limitations.33
  • A new or relocated county-road driveway requires county approval before construction, while direct state-highway access follows the state permit path.3841
  • Montrose County allows only temporary RV occupancy: up to 12 months during construction with a building permit and approved septic, 90 days for guests, or 180 days on General Agricultural land of at least 35 acres14. The owner repair-and-maintenance licensing exemption does not waive new-home permits37.
  • Short-term rentals in unincorporated Montrose County need an approved registration that is valid for 3 years, and an approved septic system if no community sewer serves the property44.

Sources

  1. Resolution 28-2023: Montrose County Building Code, quoted and re-checked
  2. Zoning Regulations & Maps, quoted and re-checked
  3. Montrose County Planning & Development (montrosecounty.net)
  4. Town of Nucla: Nucla Code Sec. 8-1 Permits required (Montrose County), quoted and re-checked
  5. Town of Nucla: Nucla LUDC Sec. 9-9-203 Definitions (Montrose County), quoted and re-checked
  6. Montrose County Board of Health Resolution: On-Site Wastewater Treatment Systems, quoted and re-checked
  7. Resolution No. 28-2023, quoted and re-checked
  8. Planning & Development, quoted and re-checked
  9. Montrose County Zoning Regulations, quoted and re-checked
  10. Montrose County Board of Health Resolution: On-Site Wastewater Treatment Systems, quoted and re-checked
  11. Montrose County Board of Health Resolution On-Site Wastewater Treatment Systems, quoted and re-checked
  12. Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
  13. Zoning Regulations & Maps (2026 county census)
  14. Montrose County Zoning Regulations, quoted and re-checked
  15. Water Administration (Colorado statewide rule), quoted and re-checked
  16. Resolution 28-2023: Montrose County Building Code, quoted and re-checked
  17. Planning & Development, quoted and re-checked
  18. Resolution 28-2023: Montrose County Building Code, quoted and re-checked
  19. montrosecounty.net, quoted and re-checked
  20. Citizen Permit Portal Tutorial, quoted and re-checked
  21. Planning & Development, quoted and re-checked
  22. Resolution 28-2023: Montrose County Building Code, quoted and re-checked
  23. Montrose County Zoning Regulations, quoted and re-checked
  24. Montrose: Montrose Code Sec. 11-7-5 Districts established (Montrose County), quoted and re-checked
  25. Montrose County Zoning Regulations, quoted and re-checked
  26. Montrose County Zoning Regulations, quoted and re-checked
  27. Montrose County Zoning Regulations, quoted and re-checked
  28. Montrose County Subdivision Regulations - Amended, quoted and re-checked
  29. Planning & Development FAQs, quoted and re-checked
  30. Montrose County Board of Health On-Site Wastewater Treatment Systems Resolution, quoted and re-checked
  31. Montrose County Board of Health Resolution: On-Site Wastewater Treatment Systems, quoted and re-checked
  32. Montrose County Board of Health On-Site Wastewater Treatment Systems Resolution, quoted and re-checked
  33. 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
  34. Montrose County Zoning Regulations, quoted and re-checked
  35. Montrose County Zoning Regulations, quoted and re-checked
  36. Resolution 28-2023: Montrose County Building Code, quoted and re-checked
  37. Colorado Revised Statutes 2026, Title 30, § 30-11-125 (Colorado statewide rule), quoted and re-checked
  38. Road and Bridge Standards Appendix Modified 3.6.24, quoted and re-checked
  39. Montrose County Subdivision Regulations - Amended, quoted and re-checked
  40. SB24-179 Floodplain Management Program (Colorado statewide rule), quoted and re-checked
  41. Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
  42. Effective property tax rate: Bolthole Index county data
  43. Median property tax bill: Bolthole Index county data
  44. Montrose County Zoning Regulations, quoted and re-checked

Written October 16, 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.

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Compared with neighboring counties

Like all 6 of its neighbors, Montrose County has countywide zoning.

RuleMontrose CountySan Miguel CountyOuray CountyMesa CountyDelta CountyDolores CountySan Juan County
Building permitRequiredRequiredRequiredRequiredLimitedNot requiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Board of HealthCounty OWTSCounty Land Use Dept.County Community DevelopmentCounty Env. HealthDolores CountyCounty Env. Health

County locator

Montrose County in Colorado

58
County map
Montrose County highlighted among the Colorado counties · colored by Index score

How Montrose County scores

Seclusion66100% ev.
Self-Sufficiency35100% ev.
Admin Boringness4190% ev.
Durability50100% ev.
Property Autonomy75100% ev.
Carry Cost74100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$462kTypical home
0.4%Property tax
$5,909Land / acre
14.9"Annual rain
31.3% of yrsSevere drought
4.6 / yr (+4.3)Mid-century 100°F days
26.8 daysMid-century dry spell
0.88" (+6%)Mid-century 1-day rain
1.18×Wildfire change factor
100%Forward climate coverage
$1,143Home insurance / yr
2.8% / yrInsurance growth
1.68%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
30,177Radius comparison (15 mi)
19.7People / sq mi
69.2%Federal land
57.2%Land at 15% slope or less
8.7%Soils rated "not limited" for septic (strict USDA rating)
103,907 acWorkable land screen
41.8%Wooded land
17.9 tonsBiomass / forest ac
48.2°FAvg temp

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Cities and towns in Montrose County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Town of Naturita · Town of Olathe

Answers from the rulebook for Montrose County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Montrose County rules

  • Building permitRequired

    Construction, enlargement, alteration, repair, movement, demolition, and occupancy changes subject to the adopted codes in unincorporated Montrose County.

    • One-story detached accessory structures used for specified storage or similar purposes may be exempt when the floor area does not exceed 200 square feet, the overhang is no more than 24 inches, and the highest point is no more than 12 feet above grade.
    • Work commenced before permit issuance incurs an additional fee equal to the building permit fee.

    accessory-structure exemption floor area: <= 200 sq ft · accessory-structure exemption height: <= 12 ft (highest point above grade) · plan review fee: 65 percent of building permit fee (when submittal documents and plans are required)

    “The landowner(s) where a structure is to be located and authorized agent(s) participating in the actual construction, enlargement, alteration, repair, movement, demolition, or change of occupancy and the owner(s) of the structure itself, share a combined responsibility to make application for and obtain the required permit to do such work.”
    One more reviewed finding on this topic
    • Required — Construction, enlargement, alteration, repair, movement, demolition, or change of occupancy in unincorporated Montrose County.
      “The landowner(s) where a structure is to be located and authorized agent(s) participating in the actual construction, enlargement, alteration, repair, movement, demolition, or change of occupancy and the owner(s) of the structure itself, share a combined responsibility to make application for and obtain the required permit to do such work.”
  • Building code adoptedAdopted (with conditions)

    Building codes for construction in unincorporated Montrose County.

    • The International Fire Code is instituted and enforced by the applicable local fire protection district.
    • Electrical and plumbing permits and codes are instituted and enforced by Colorado.

    IBC edition: 2018 · IRC edition: 2018 (One- and two-family dwellings) · IECC edition: 2018

    “There is hereby adopted by the County for the purpose of providing minimum standards to safeguard the health, safety, welfare and property of the inhabitants of unincorporated Montrose County, the International Building Code (IBC), 2018 Edition; The International Residential Code (IRC) for One and Two Family Dwellings, 2018 Edition; the International Energy Conservation Code (IECC), 2018 Edition; the International Property Maintenance Code, 2018 Edition and the National Conference Of States On Building Codes and Standards/American National Standards Institute (NCSBCS/ANSI) A225. 1-1994 Non-Permanent Foundations Guide for Manufactured Housing, as amended or modified by the amendments set forth herein. International Fire Code shall be instituted and enforced by the applicable local fire protection district jurisdiction. Electrical and Plumbing permits and codes are instituted and enforced by the State of Colorado.”
    One more reviewed finding on this topic
    • Adopted — County building codes in unincorporated Montrose County.
      “the International Building Code (IBC), 2018 Edition; The International Residential Code (IRC) for One and Two Family Dwellings, 2018 Edition”
  • InspectionsRequired

    Building-code inspections administered by Montrose County Building Department.

    • Certain inspection and certification work must be performed by a Colorado-licensed registered professional engineer, including work done in violation of adopted codes.
    • Lath and gypsum-board inspections occur after installation but before plastering or taping and finishing.
    “The Building Department provides plan review, inspections and enforcement of the currently adopted building codes and is responsible for review and approval of onsite wastewater treatment systems (septic systems).”
  • Certificate of occupancyLimited

    New structures for human habitation and manufactured homes in unincorporated Montrose County.

    • A written foundation completion statement is required before framing inspection and issuance of a Certificate of Occupancy or Certificate of Use.
    • Manufactured homes may not be used until an approved final inspection results in a Certificate of Use.
    “Upon an approved final inspection a “Certificate of Use” will be issued. Use of such manufactured home is not allowed until the Certificate of Use is issued.”
  • County-wide zoningPresent

    County zoning regulations and zoning maps for unincorporated Montrose County.

    • The county zoning regulations apply to unincorporated areas; incorporated municipalities may have separate authority.
    “These Regulations shall apply to all the unincorporated land and buildings, land uses, changes of land use, and development located within the limits of Montrose County, Colorado.”
    One more reviewed finding on this topic
    • Present (with conditions) — County zoning in unincorporated Montrose County.
      “The unincorporated area of Montrose County is hereby divided into districts as shown on the Official Zone District Map, which together with all explanatory material thereon, is hereby adopted and incorporated herein by reference and declared to be part of these Regulations.”
  • Local zoningPresent (with conditions)

    County-administered zoning in unincorporated Montrose County; this does not aggregate municipal zoning administration.

    • The county's zoning regulations contain multiple zone districts and use standards.
    “The Planning Department plans and provides for growth in accordance with County Subdivision Regulations, Zoning Regulations and Master Plan. The department provides support, processes and presents applications to the Planning Commission and Board of County Commissioners.”
    One more reviewed finding on this topic
    • Present (with conditions) — County-administered zoning in unincorporated Montrose County.
      “The following table identifies the uses allowed by right (“R”) or the uses requiring a special use permit (“S”) within the General Agricultural District. Any use not listed shall be prohibited except as set forth in Section II.C.3, Unlisted Uses.”
  • Zoning districtsPublished

    Official zoning districts and the Official Zone District Map for unincorporated Montrose County

    • The Official Zone District Map is located in the County Assessor's Office and on the County GIS website.
    • The regulations establish General Agricultural, General Residential, Manufactured Home Park Residential, Multiple Family Residential, General Business, General Commercial, Industrial, Public Lands, and Planned Development Overlay districts.
    • Uses may be allowed by right or require a special use permit depending on the district use table; unlisted uses are generally prohibited unless classified under the unlisted-use procedure.
    “on the county Geographic Information Systems (GIS) website.”
    One more reviewed finding on this topic
    • Published — Montrose County zoning district regulations and official zoning maps.
      “Zoning Regulations - Remediated Zoning Regulations - Recorded Official Zoning District Maps Zoning Districts Map Viewer”
  • Minimum dwelling sizeSpecified

    Dwelling units regulated by Montrose County building codes.

    • The definition applies to a dwelling unit providing complete independent living facilities.

    minimum dwelling-unit area: >= 300 sq ft

    “Dwelling unit: A single unit (minimum of 300 square feet) providing complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.”
    One more reviewed finding on this topic
    • Specified — Dwelling units subject to the Montrose County Building Code.
      “Dwelling unit: A single unit (minimum of 300 square feet) providing complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.”
  • Minimum lot sizeSpecified

    Residential development in county zoning districts.

    • General Agricultural zoning requires 1 contiguous acre.
    • General Residential zoning requires 1 contiguous acre with OWTS, or 15,000 square feet for duplexes and 10,000 square feet for single-family dwellings served by public water and sewer.
    • Other districts have different standards.

    General Agricultural minimum lot size: >= 1 contiguous acre · General Residential OWTS minimum lot size: >= 1 contiguous acre · General Residential single-family public water and sewer minimum lot size: >= 10000 sq ft · General Residential duplex public water and sewer minimum lot size: >= 15000 sq ft

    “Lot Size OWTS: 1 contiguous acre* Public water & sewer systems: Duplex: 15,000sf; Single-family dwelling: 10,000sf”
  • Building heightSpecified

    Buildings in Montrose County zoning districts.

    • General Residential and Manufactured Home Park Residential standards specify 35 feet; General Agricultural is listed as N/A.
    • Other districts may have different standards.

    General Residential building height: <= 35 ft · Manufactured Home Park Residential building height: <= 35 ft

    “Building Height 35’ [...] All Principal and Accessory buildings must meet these setbacks.”
  • Living in an RVTemporary only (with conditions)

    Temporary occupancy of recreational vehicles in unincorporated Montrose County.

    • During construction of a primary residence, an active Montrose County building permit and approved OWTS or community sewer connection are required; the duration is limited to 12 months, with an option for extension up to 6 months by the Planning and Development Director.
    • One RV may be occupied by property-owner guests for no more than 90 days in one calendar year.
    • One RV may be allowed on property of 35 acres or larger in the General Agricultural District for no more than 180 days in one calendar year, subject to the regulation's hookup conditions.

    construction occupancy period: 12 months (possible extension up to 6 months) · guest occupancy period: <= 90 days per calendar year (one RV) · agricultural-property occupancy period: <= 180 days per calendar year (property must be at least 35 acres)

    “RVs are allowed to be temporarily occupied within the County under the following circumstances:”
  • Camping on your landLimited

    Campground and RV-park camping uses in unincorporated Montrose County

    • A campground's principal business must provide tent sites only; RVs and mobile homes are prohibited within a campground.
    • Campgrounds must be at least two acres and provide at least twelve camping spaces.
    • An RV park may provide RVs, travel trailers, camper vehicles, camping cabins, park models, and tents; mobile homes and manufactured homes are prohibited within RV parks.
    • RV parks in the General Agricultural District must be at least five acres, and RV parks in all zone districts must provide spaces for at least ten RVs.
    • RV park sewage systems must comply with state law and the County Water and Sewer standards.

    minimum campground area: >= 2 acres · minimum campground spaces: >= 12 camping spaces · minimum RV park area in General Agricultural District: >= 5 acres · minimum RV park spaces: >= 10 RV spaces

    “provide at least twelve (12) camping spaces.”
  • Tiny homesLimited

    Tiny homes treated by the County as recreational vehicles, when occupied temporarily in unincorporated Montrose County

    • The County defines a tiny home as a towed vehicle designed as a temporary shelter used for travel, recreation, or short-term living purposes.
    • During construction of a primary residence, the RV must be on vacant property, pursuant to an active building permit, and connected to an approved OWTS or community sewer system.
    • Construction-related occupancy is limited to twelve months, with an extension of up to six months available upon approval of the Planning and Development Director.
    • Guest occupancy is limited to one RV and ninety days in one calendar year.
    • In the General Agricultural District, one RV may be occupied on property of at least thirty-five acres for no more than 180 days in one calendar year and must be connected to an approved OWTS.

    construction occupancy duration: 12 months (extension up to 6 months upon approval of the Planning and Development Director) · guest occupancy duration: <= 90 days per calendar year (one RV) · General Agricultural District occupancy duration: <= 180 days per calendar year (property must be at least 35 acres and RV connected to approved OWTS)

    “TINY HOME: See Recreational Vehicle (RV). [...] RVs are allowed to be temporarily occupied within the County under the following circumstances:”
  • Manufactured homesLimited

    Manufactured homes in unincorporated Montrose County.

    • Manufactured homes must be installed and inspected under Colorado Division of Housing standards.
    • Manufactured homes outside established manufactured home parks must be placed on a permanent foundation designed by a Colorado licensed professional engineer.
    • A Certificate of Use is required after approved final inspection; use is not allowed before issuance.
    “All manufactured homes shall be installed and inspected pursuant to Colorado Division of Housing standards.”
    One more reviewed finding on this topic
    • Limited — Manufactured homes in unincorporated Montrose County.
      “All manufactured homes located within the unincorporated areas of Montrose County and which are not located within an established “manufactured home park” [...] must be placed on a permanent foundation designed by a Colorado licensed professional engineer [...] Upon an approved final inspection a “Certificate of Use” will be issued. Use of such manufactured home is not allowed until the Certificate of Use is issued.”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units in the General Agricultural and General Residential zoning districts.

    • ADUs must meet the dimensional standards of the applicable zone district.
    • County FAQ states an ADU is allowed in the General Agricultural district with a minimum of 1 acre and in the General Residential district.

    minimum lot size for FAQ agricultural ADU condition: >= 1 acre

    “Accessory Dwelling Units (ADU) (See Sec. III.C.2.a) R”
  • Who permits septicCounty (with conditions)

    On-site wastewater treatment systems in Montrose County.

    • The county Building Department reviews and approves onsite wastewater treatment systems.
    • The Board of Health resolution and applicable state requirements also govern.
    “The Building Department provides plan review, inspections and enforcement of the currently adopted building codes and is responsible for review and approval of onsite wastewater treatment systems (septic systems).”
    One more reviewed finding on this topic
    • County — On-site wastewater treatment systems in unincorporated Montrose County and municipal areas within the district public health agency, except municipalities with their own public health agency.
      “The jurisdiction of the Montrose County Board of Health shall extends over all unincorporated areas and over all municipal corporations within the territorial limits of the county comprising the district public health agency, but not over the territory of any municipal corporation that maintains its own public health agency.”
  • Septic permitRequired

    New, altered, repaired, replaced, or expanded OWTS in Montrose County.

    • The application must include required documentation and permit fees.
    • No work may commence until the Health Officer reviews the application and supporting data and approves commencement.
    • Applications require plans and data bearing the signature and stamp of the Engineer of Record.
    • An OWTS permit expires one year after issuance if construction has not commenced, unless otherwise specified by the Board of Health.

    OWTS application surcharge: 23 USD (For each permit issued for a new, repaired, or upgraded OWTS; $3 is retained locally and $20 transmitted to the state treasurer.) · minimum lot area for new OWTS: >= 1 acre (Legally created pre-regulation lots under 1 acre may require variance procedures.)

    “intends to install new, alter, repair, replace, or expand the use of an OWTS”
  • Septic inspectionRequired

    On-site wastewater treatment systems under the Montrose County Board of Health regulations, within the Board of Health jurisdiction

    • A final inspection must occur before backfilling the OWTS.
    • The local public health agency must confirm installation according to permit requirements and applicable regulations or variances.
    • The Board of Health jurisdiction covers unincorporated areas and municipal corporations within the county that are part of the district public health agency, but not municipalities maintaining their own public health agency.
    • For an occupancy permit for a building not served by a sewage treatment works, the local public health agency must make a final OWTS inspection and approve the installation.
    “Final inspection prior to backfilling the OWTS by the local public health agency”
  • Off-grid sanitationProhibited

    Discharge of domestic sewage or effluent on property in Montrose County.

    • Discharge may occur only if the sewage or effluent meets Colorado Water Quality Control Commission standards.
    “Under no condition shall domestic sewage or effluent be permitted to be discharged, uncontained, upon the surface of the ground, or into Waters of the State, unless the domestic sewage or effluent meets the water quality standards of the Colorado Water Quality Control Commission.”
    One more reviewed finding on this topic
    • Allowed (with conditions) — Composting, incinerating, and chemical toilets used as part of sanitation arrangements in Montrose County.
      “The local board of health may permit incinerating, composting and chemical toilets. The use of an incinerating, composting or chemical toilet will not reduce the required size of the OWTS”
  • Well permitRequired

    Preliminary subdivision plans in Montrose County that will be served by one or more wells.

    • Approved well permits from the State Division of Water Resources must accompany the preliminary plan submission.
    “If the subdivision is to be served by a well or wells, approved well permits from the State Division of water Resources shall be provided along with the Preliminary Plan submittal.”
  • Mandatory utility hookupConditional

    Connection to sewage treatment works for property served by an OWTS.

    • Connection is mandatory when the property is within 400 feet of a sewage treatment works and the governing body allows the connection.
    • The Board of Health may require a greater distance depending on circumstances and related rules or agreements.

    connection distance: <= 400 feet (Greater distance may be required by the Board of Health)

    “Connection to a sewage treatment works is mandatory if the property to be served is located within four hundred (400) feet of a sewage treatment works and the governing body allows the connection.”
    One more reviewed finding on this topic
    • Conditional — Manufactured Home Park Residential districts and other regulated uses requiring water or sewer service.
      “Connection to community sewer shall be required.”
  • Subdividing landRegulated (with conditions)

    Division of land and subdivision improvements in Montrose County.

    • Subdivisions must comply with county subdivision, Board of Health, zoning, and road-and-bridge standards.
    • Minor subdivisions require staff review and action by the Planning Commission and Board; Board approval at a duly noticed public meeting is required.
    “No Minor Subdivision shall be considered approved”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Subdivision eligibility and approval in Montrose County.
      “In order to be eligible for subdivision in Montrose County, a property must have direct frontage on a County road, must have access to potable water and must meet the minimum lot size requirements of the County Zoning Resolution.”
  • Driveway accessRequired

    New, moved, or relocated access points and driveways connecting to County roads or rights-of-way in Montrose County

    • The access must meet the adopted Montrose County Standards and Specifications for Roads and Bridges.
    • Access construction cannot begin until the access permit application is approved.
    • The application must be completed online through the Montrose County SmartGov portal.
    • The applicant must provide site address, contact information, subdivision name, proof of access easement when the property does not abut a County road, the access permit fee, and access type.
    • The applicant must arrange a site visit with the County inspector before approval and a final inspection after access construction is complete.
    • An access variance is required for an additional access.
    “An access permit is required for a new access or when an access is moved or relocated.”
    One more reviewed finding on this topic
    • Required — Access for one- and two-family dwelling building permits in unincorporated Montrose County.
      “Before any Building Permit for a one or two family dwelling may be issued, access to the property and an assigned address must have been applied for from the Montrose County Planning and Development Department.”
  • Short-term rentalsLimited

    Short-term rentals in legally approved single-family dwellings, duplexes, and ADUs in unincorporated Montrose County.

    • A short-term rental registration must be approved before operation and renewed every three years.
    • If not served by municipal or community sewer, an approved OWTS adequate for the rental is required.
    • Occupancy is limited to OWTS capacity unless additional persons are authorized through a specific OWTS administrative review.
    • A county and/or state access permit must be approved before use.
    • The county may revoke registration for noncompliance or three written complaints within one calendar year; after revocation, a new permit will not be issued for at least one year.

    registration validity: 3 years (renewal required) · neighbor notification distance: 500 ft

    “The owner(s) must complete an application for and obtain approval of a short-term rental registration from the Planning and Development Department. An approved registration is valid for three (3) years and must be renewed for each additional three-year period.”
  • Permit processPublished (with conditions)

    Building permits and planning applications handled through Montrose County Planning and Development.

    • Applications and building permits may be submitted through the Citizen Permit Portal.
    • Access and addressing must be applied for before a building permit for a one- or two-family dwelling may issue.
    • A complete application may trigger referral and review periods for subdivision applications.
    “The Citizen Permit Portal is where you can review public building permit reports and apply for building permits and planning applications.”
    One more reviewed finding on this topic
    • Published — Online Montrose County permit applications and inspections.
      “Permit applications can be submitted and viewed through the Permit Portal. You must be logged in to the Permit Portal to submit a permit application.”

Colorado rules that apply here

  • Owner-builder exemptionConditional

    An individual owner performing repair or maintenance work on the owner's property in a Colorado county that has adopted a building-contractor licensing program under C.R.S. § 30-11-125.

    • The statute addresses county building-contractor licensing programs and applies to work in unincorporated county areas when a county has adopted such a program.
    • The exemption is limited to repair or maintenance work on the individual's own property; it does not establish a statewide exemption for constructing a new residence or for all contractor-regulated work.
    • A county may require a building-contractor license for persons engaging in the business of being a building contractor in its unincorporated areas.
    • The statute defines a building contractor as a person who, for compensation, directs, supervises, or undertakes work for which a county building permit is required.
    • The statute source states that § 30-11-125 was effective August 3, 2007, and was amended effective October 1, 2019.
    “Nothing [...] shall be construed to require any individual to hold a license to perform repair or maintenance work on his or her own property”
    2 more reviewed findings on this topic
    • Conditional — An individual performing electrical work on the individual's own Colorado property or residence, including a primary residence, under the statewide electrical licensing statute.
      “Nothing in this article 115 [...] require any individual to hold a license”
    • Conditional — An individual performing plumbing work on the individual's own Colorado property or residence, including a primary residence, under the statewide plumbing licensing statute.
      “Nothing in this article 155 requires an individual to hold a license”
  • Building in a floodplainRequired

    Development in floodplain areas subject to Colorado floodplain-management requirements, and state-owned land in counties or municipalities that do not participate in the National Flood Insurance Program.

    • Local floodplain regulations must equal or exceed FEMA National Flood Insurance Program minimum design and construction criteria.
    • Local floodplain regulations must comply with Colorado Water Conservation Board rules and regulations for regulatory floodplains.
    • The state program applies to development on state-owned land in counties and municipalities that do not participate in the National Flood Insurance Program.
    “Local government floodplain management regulations for development in floodplain areas must equal or exceed the federal emergency management agency's national flood insurance program's (national flood insurance program) minimum design and construction criteria and must comply with the Colorado water conservation board's (CWCB) rules and regulations for regulatory floodplains in Colorado.”
  • Campground & park staysAllowed (with conditions)

    Temporary overnight camping, including parking a motor home or traveler, on land and water under the control of Colorado Parks and Wildlife, including state parks and state recreation areas.

    • The source addresses lands and waters under the control of the Division of Parks and Wildlife, not all public or private land statewide.
    • Camping includes parking a motor vehicle, motor home, or traveler for the apparent purpose of overnight occupancy.
    • A commission-issued permit may be required; the statute defines permits to include campground permits and electrical hookup permits.
    • The state may charge fees for required passes or permits for use of any state park or state recreation area where supervision, maintenance, or specified facilities warrant a fee.

    overnight occupancy: true (Camping definition includes the parking of a motor vehicle, motor home, or traveler for the apparent purpose of overnight occupancy.) · permit types: campground permits; electrical hookup permits

    “Develop state parks and state recreation areas suitable for such recreational activities as camping, [...] "Camping" means [...] the parking of a motor vehicle, motor home, or traveler”
  • county zoning authorityGeneral

    Colorado counties adopting zoning plans for all or any part of unincorporated territory.

    • The county planning commission may make the zoning plan; in a county having a county planning commission, it must do so upon order by the board of county commissioners.
    • The zoning plan may regulate districts or zones, including building location, height, bulk, size, lot coverage, lot size, open spaces, population density, building and land uses, and access to sunlight for solar energy devices.
    • The plan may include regulations for uses on or along storm or floodwater runoff channels or basins only when the channel or basin has been designated and approved by the Colorado water conservation board, to lessen or avoid hazards from storm or floodwaters.
    • The statute applies to unincorporated territory and does not describe incorporated cities or towns as within this county zoning grant.
    “zoning all or any part of the unincorporated territory within such county”
  • county building authorityGeneral

    Colorado counties adopting and enforcing building codes and requiring building permits in designated unincorporated areas.

    • A board of county commissioners may adopt a building code in all or part of the county, but the area must not be within the limits of an incorporated city or town.
    • Buildings or structures used solely to shelter agricultural implements, farm products, livestock, or poultry may be excepted from the building code and permit requirement.
    • Before adoption, the county planning commission may designate part or all of the county for the building code upon request from the board of county commissioners; the board must hold a public hearing and publish notice once weekly for four consecutive weeks.
    • After adoption of the building code, construction, reconstruction, alteration, or remodeling in the designated area requires a building permit, except for the agricultural-shelter exception.
    • The board must fix a reasonable schedule of building-permit fees; no permit fee may be charged unless a qualified inspector actually performs an inspection.
    • Plans must conform to the building code, and plans and specifications generally must bear the seal of a Colorado-licensed architect or engineer unless exempted by section 12-120-403.
    • Every county adopting or updating a building code must adopt and enforce an energy code meeting or exceeding one of the three most recent International Energy Conservation Code versions under section 30-28-211.
    • The 2025 amendment to section 30-28-204 is effective January 1, 2026 and adds accessibility requirements for substantially amended or updated county building codes, with an exception for compliant one- and two-family dwellings and townhomes.
    “A board of county commissioners is authorized to adopt ordinances and a building code”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Lot coverage — Lot-coverage limits in Montrose County zoning districts.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Montrose County, Colorado

Is Montrose County a good place to live off-grid or homestead?

Montrose County scores 58/100 on the Bolthole Index, a solid county profile. Its strengths: a stronger property-autonomy legal backdrop and manageable long-term carry cost. Watch-outs: weak self-sufficiency basics: only 14.9″ of rain a year, in severe drought 31.3% of years and more administrative friction around building and land use.

Do you need a building permit in Montrose County, Colorado?

Montrose County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Montrose County Board of Health / Montrose County Public Health (OWTS program). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Montrose County?

Living in an RV on your own land in Montrose County is allowed on a temporary basis only: Temporary occupancy of recreational vehicles in unincorporated Montrose County. During construction of a primary residence, an active Montrose County building permit and approved OWTS or community sewer connection are required; the duration is limited to 12 months, with an option for extension up to 6 months by the Planning and Development Director. One RV may be occupied by property-owner guests for no more than 90 days in one calendar year. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Montrose County, Colorado?

Land in Montrose County runs about $5,909 per acre, based on the latest county data.

What is the water situation in Montrose County?

Montrose County gets about 14.9" of rain a year, with severe drought in roughly 31.3% of years.

How remote is Montrose County?

A typical private-land location has about 30,177 people within 15 miles and 411,552 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Montrose compares in Colorado

Compare side-by-side →See all 64 Colorado counties ranked →