Bolthole Index

Grand County, Colorado

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

57Index Score / 100
#25 of 64 in Colorado

Unincorporated Grand County, Colorado requires building permits for construction, alteration, relocation, repair, changes of use and demolition, subject to listed exceptions, and the Planning & Zoning Division sets zoning there.12 Septic permits for unincorporated land come from the county's Building & Sanitation Division, and living in an RV on your land is not allowed outside a narrow owner-builder exception.345

At a glance

Building permit
Required for covered construction and alterations, with limited exceptions1
Zoning
Grand County zoning applies in unincorporated areas2
Septic
The county reviews designs, issues OWTS permits and conducts inspections36
RV living
Not allowed as a home; private camping limited to 14 days on 35+ acres; one RV during owner-built construction45
Tiny home
A 400 sq ft home on a foundation is allowed where single-family dwellings are; mobile tiny homes follow RV rules7
Owner-builder
County publishes an Owner as Builder process; building, zoning, septic and inspection rules still apply8
Minimum home size
Dwelling units must have at least 400 sq ft of floor area, measured on the outside walls9
Private well
A Colorado Division of Water Resources permit is required, subject to exceptions and basin rules10

Who to call

Building permits

Grand County Building & Sanitation Division

Building permits, plan review, inspections and code compliance in unincorporated Grand County and listed towns

970-725-3255

308 Byers Avenue, Hot Sulphur Springs, CO 80451

Septic permits

Grand County Building & Sanitation Division

Onsite wastewater design review, permits and field inspections as the Grand County Sanitarian

970-725-3255

308 Byers Avenue, Hot Sulphur Springs, CO 80451

Zoning

Grand County Planning & Zoning Division

Land use, zoning, permitted uses, setbacks, subdivisions and special-use permits in unincorporated Grand County

970-725-3255

planning@co.grand.co.us

308 Byers Avenue, Hot Sulphur Springs, CO 80451

Roads & driveways

Grand County Road & Bridge Department

Driveway and access permits for driveways connecting to county roads

970-887-2123

467 E. Topaz Ave., Granby, CO 80446

Floodplain permits

Grand County Floodplain Administrator

Floodplain development permit administration and review

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 Grand 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 Grand County, Colorado?

Yes. Unincorporated Grand County requires a permit for construction, alteration, relocation, repair, a change of use or demolition of a building or structure.1 Limited exceptions include detached sheds and playhouses of 120 square feet or less, fences not over six feet and ordinary finish work, but they carry detailed conditions, so confirm the specific project before starting.11 The county inspects new construction and remodeling for compliance with local building and fire codes.12 Grand County adopted the 2021 Building Codes and the 2025 Colorado Wildfire Resiliency Code with local amendments, effective July 1, 2026.13 Building permit fees are based on the structure's square footage and total project valuation, and the county quotes the fee after plan check.14 Property owners can build their own home through the county's Owner as Builder process, but that does not waive building, zoning, septic or inspection requirements.8

Who handles Grand County building permits and inspections?

Grand County Building & Sanitation handles building permits, plan review, inspections and code compliance, and it is the authority for unincorporated Grand County and for the town limits of Grand Lake, Hot Sulphur Springs and Kremmling.15 Call 970-725-3255 or visit 308 Byers Avenue in Hot Sulphur Springs for help with the correct application path.15 All building applications are submitted online, and Planning & Zoning performs a pre-check before an application advances.16 Planning questions go to the Grand County Planning & Zoning Division at planning@co.grand.co.us.17 Incorporated towns outside that list may run their own building rules, so for a parcel inside any other town, ask the town before filing with the county.2 Septic permits for unincorporated land still come from the county Building & Sanitation Division, not from a town.3

Does Grand County, Colorado have zoning?

Yes. The Grand County Planning & Zoning Division manages land use and development in unincorporated Grand County.2 The county has many zoning districts, and Planning & Zoning needs an accurate legal description to verify a parcel's designation.18 For most properties the published setbacks are 30 feet in front, 10 feet at the sides and 20 feet at the rear, with a 30-foot setback from a water body or waterway, but they vary by district.19 Every dwelling unit must contain at least 400 square feet of floor area, measured on the outside walls.9 Maximum building height is 35 feet above finish grade, or 40 feet where the finished grade changes by five feet or more within the footprint.20 Minimum lot size depends on the district; the county's mobile home district, for example, sets 2 acres for un-subdivided land and larger areas where percolation tests show the soil cannot handle the septic system.21 Send the parcel's legal description and proposed use to Planning & Zoning before relying on a listing's buildability claims.17

How do septic permits work in Grand County, Colorado?

Grand County Building & Sanitation serves as the county sanitarian and issues septic (onsite wastewater treatment system) permits for unincorporated Grand County.223 Applications go in through the county's online Cloudpermit portal and need an engineered, stamped design from a Colorado registered professional engineer.23 The county also requires a notarized Declaration of Covenants, with a $43 recording fee paid to the County Clerk.23 The permit fee is $850 for a new system or complete replacement and $400 for repairs.23 Colorado requires an OWTS permit before a system is constructed, altered or installed, and a final inspection and local approval before it is placed in use.2425 Only 3.4% of mapped county soils rate as free of severe limits for a conventional drain field, so make septic feasibility and the engineered design an early purchase contingency.26

Can you live in an RV or tiny home in Grand County?

Living in an RV on private land in unincorporated Grand County is not allowed as a home. Private camping is permitted only on property of 35 acres or more, never in Residential or Estate zoned districts, for no more than 14 days in any consecutive three-month period, and may not be used as a dwelling, residence or home.4 One narrow exception exists for owner-builders: with an approved building permit, one self-contained recreational camping vehicle may be used during construction of an owner-built single-family dwelling for one continuous year starting at the footing inspection, with no extensions.5 Mobile tiny homes fall under the same rules as RVs and campers, while a 400 square foot home on a foundation is allowed in a zoned district that allows single-family dwellings.7 Colorado also allows state-certified tiny homes for long-term living, but plans need state approval before construction and the unit remains subject to local zoning and site criteria.27 Colorado's state-park camping rules do not answer the private-land question.28

What are the steps to build a home in Grand County?

  1. Ask Planning & Zoning to verify the parcel's zoning designation, permitted use and setbacks from its legal description.1819
  1. Resolve access early; Road & Bridge says a county-road driveway or access permit comes before the building application.29 Direct access to a state highway requires a Colorado Department of Transportation access permit.30
  1. Arrange an engineered OWTS design and apply through Cloudpermit for the county septic permit if public sewer is unavailable.2331
  1. Apply to the Colorado Division of Water Resources if the project needs a groundwater well.10
  1. Submit the building application online and complete the Planning & Zoning pre-check.16
  1. If you want to live on site while you build as an owner-builder, confirm the one-year RV allowance once the building permit is approved.5
  1. Complete required building and septic inspections before occupancy.1225

What should you check before buying land in Grand County?

Confirm zoning, setbacks, legal access, water and wastewater feasibility before treating a Grand County parcel as buildable1819103. Septic deserves special attention because only 3.4% of mapped soils rate as free of severe limits for a conventional drain field26. Terrain can also narrow the practical building envelope: only 26.6% of county land is at a 15% slope or less, 53.9% is wooded and 69% is federal land323334. Ask the county Floodplain Administrator whether the site needs a floodplain development permit35. If access is directly from a state highway, budget for the separate state access-permit process30.

Watch-outs

  • Private camping is limited to 35-acre parcels outside Residential and Estate districts and to 14 days in a three-month period, so do not plan to live in an RV on a Grand County lot.4
  • The owner-builder RV allowance lasts one continuous year from the footing inspection with no extensions, and the building permit can be rescinded if the home is unfinished.5
  • A county-road driveway or access permit comes before the building application, while direct state-highway access goes through the Colorado Department of Transportation.2930
  • Grand County adopted new building codes with local amendments effective July 1, 2026, and some permits issued earlier stay under the prior codes.13

Sources

  1. co.grand.co.us, quoted and re-checked
  2. Planning & Zoning, quoted and re-checked
  3. co.grand.co.us, quoted and re-checked
  4. Grand County Zoning Regulations, quoted and re-checked
  5. Grand County Zoning Regulations, quoted and re-checked
  6. co.grand.co.us, quoted and re-checked
  7. Grand County Zoning Regulations, quoted and re-checked
  8. Permit Forms & Guidelines, quoted and re-checked
  9. Grand County Zoning Regulations, quoted and re-checked
  10. Water Administration (Colorado statewide rule), quoted and re-checked
  11. co.grand.co.us (2026 county census)
  12. co.grand.co.us, quoted and re-checked
  13. Codes & Amendments, quoted and re-checked
  14. Fees, quoted and re-checked
  15. Grand County Building & Sanitation Division (co.grand.co.us)
  16. co.grand.co.us, quoted and re-checked
  17. Grand County Planning & Zoning Division (co.grand.co.us)
  18. Planning & Zoning FAQ, quoted and re-checked
  19. Planning & Zoning FAQ, quoted and re-checked
  20. Grand County Zoning Regulations, quoted and re-checked
  21. Grand County Zoning Regulations, quoted and re-checked
  22. Grand County Building & Sanitation Division (co.grand.co.us)
  23. Septic Permit Information, quoted and re-checked
  24. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  25. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  26. 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
  27. Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
  28. Title 33 - Parks and Wildlife - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  29. Grand County Road & Bridge Department (co.grand.co.us)
  30. Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
  31. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  32. Share of land at 15% slope or less: Bolthole Index county data
  33. Wooded share of land: Bolthole Index county data
  34. Federal land share: Bolthole Index county data
  35. Grand County Floodplain Administrator (co.grand.co.us)

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.

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Compared with neighboring counties

Like all 6 of its neighbors, Grand County requires a building permit for a home.

RuleGrand CountySummit CountyClear Creek CountyJackson CountyGilpin CountyBoulder CountyEagle County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Building & Sanitation Div.County Env. Health Dept.County Env. Health Dept.County Env. HealthCounty Community DevelopmentCounty Public HealthCounty Env. Health

County locator

Grand County in Colorado

57
County map
Grand County highlighted among the Colorado counties · colored by Index score

How Grand County scores

Seclusion66100% ev.
Self-Sufficiency39100% ev.
Admin Boringness4190% ev.
Durability40100% 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 →

$758kTypical home
0.3%Property tax
$2,754Land / acre
22.6"Annual rain
16.4% of yrsSevere drought
0 / yr (+0)Mid-century 100°F days
14.4 daysMid-century dry spell
0.99" (+4.8%)Mid-century 1-day rain
1.41×Wildfire change factor
100%Forward climate coverage
$2,399Home insurance / yr
8.5% / yrInsurance growth
0.88%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
3,605Radius comparison (15 mi)
8.6People / sq mi
69%Federal land
26.6%Land at 15% slope or less
3.4%Soils rated "not limited" for septic (strict USDA rating)
34,545 acWorkable land screen
53.9%Wooded land
25 tonsBiomass / forest ac
37.7°FAvg temp

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Cities and towns in Grand 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 Kremmling

Answers from the rulebook for Grand County

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

Grand County rules

  • Building permitRequired

    Construction, alteration, relocation, repair, change of use, or demolition of any building or structure in Grand County-administered areas.

    • Exceptions include one-story detached accessory structures used as tool and storage sheds, playhouses and similar uses when floor area does not exceed 120 square feet and height does not exceed 12 feet, only when in conjunction with a single-family dwelling; fences not over six feet; retaining walls not over four feet unless supporting a surcharge or impounding Class I, II or III-A liquids; water tanks supported directly upon grade up to 5,000 gallons with height-to-diameter or width ratio no more than 2-to-1; platforms, walks and driveways at grade not part of an accessible route; painting, papering, tiling, carpeting, cabinets, countertops and similar finish work; prefabricated swimming pools less than 24 inches deep; swings and playground equipment; and qualifying window awnings projecting no more than 54 inches and requiring no additional support.
    • The page states all permit applications are submitted online.
    “A permit is required to perform any construction, alteration, relocation, repair, change of use, or demolition of any building or structure.”
  • Owner-builder exemptionAvailable (with conditions)

    Property owners applying to build under Grand County's owner-as-builder process.

    • Grand County publishes an Owner as Builder Form described as a property-owner acknowledgement of contractor insurance.
    • The form is identified as being for use by Owners as Builders.
    • The form's existence does not establish exemption from building, zoning, sanitation, or inspection requirements; those requirements continue to apply.
    “Owner as Builder Form (Property Owner Acknowledgement of Contractor Insurance - for use by "Owners as Builders")”
  • Building code adoptedAdopted (with conditions)

    Building codes administered by Grand County.

    • Grand County adopted the 2021 Building Codes and 2025 Colorado Wildfire Resiliency Code with local amendments effective July 1, 2026.
    • Some permits issued before July 1, 2026 remain subject to the listed prior codes.
    “Grand County has adopted 2021 Building Codes and the 2025 Colorado Wildfire Resiliency Code with Local Amendments, effective July 1, 2026.”
  • InspectionsRequired

    Inspection of new construction and remodeling administered by Grand County.

    • The county states inspections ensure compliance with local building and fire codes.
    • The county page also states that inspections are conducted on a discretionary basis in its emergency procedure notice.
    “The Division is responsible for inspection of all new construction and remodelling to ensure the structures comply with local building code and fire codes”
  • County-wide zoningPresent (with conditions)

    County zoning and land-use regulation in unincorporated Grand County.

    • The county source expressly scopes the Planning and Zoning Division's responsibility to unincorporated Grand County.
    • Incorporated municipalities may administer their own rules.
    “The Planning and Zoning Division is responsible for managing land use and development within unincorporated Grand County.”
  • Local zoningPresent (with conditions)

    County land-use and zoning regulation in unincorporated Grand County.

    • The Grand County Planning and Zoning Division manages land use and development within unincorporated Grand County.
    • Development and building permit applications are reviewed for conformance with Grand County Regulations, including zoning, permitted uses, setbacks, height, lighting, landscaping, signs, and other development standards.
    • This claim does not establish zoning administered by incorporated municipalities within Grand County.
    “The Planning and Zoning Division is responsible for managing land use and development within unincorporated Grand County.”
    One more reviewed finding on this topic
    • Present (with conditions) — Land use and development within unincorporated Grand County, including county zoning, rezoning, special-use permits, and related development standards.
      “The Planning and Zoning Division is responsible for managing land use and development within unincorporated Grand County.”
  • Zoning districtsPublished (with conditions)

    County zoning districts and maps for unincorporated Grand County.

    • The county provides zoning regulations and an official zoning map with multiple zone maps.
    • A property's specific designation requires an accurate legal description.
    “Grand County has a multitude of zoning districts. It is necessary to have an accurate legal description of the subject property in order to verify the zoning designation.”
  • Minimum dwelling sizeSpecified

    County-defined dwelling units in Grand County zoning districts.

    • The minimum is measured on the outside walls.
    • The rule is stated in the definitions section of the Grand County Zoning Regulations.

    minimum dwelling-unit floor area: >= 400 square feet

    “All dwelling units shall contain at least four hundred (400) square feet of floor area measured on the outside walls.”
  • Minimum lot sizeDistrict specific (with conditions)

    All uses permitted in the Grand County M Mobile/Mmanufactured Home District and individual mobile homes in unincorporated Grand County.

    • On subdivided land, the applicable area depends on whether public water and public sewage facilities serve the land.
    • The minimum-area regulations must be increased where percolation tests show the soil cannot handle the septic system required for the proposed maximum population density.
    • A separately owned or qualifying pre-existing recorded-subdivision lot may be occupied without regard to otherwise specified minimum lot-area and lot-width requirements under Section 14.1(1).
    • The regulations may include one-half the width of adjacent rights-of-way for lots one acre or more.

    unsubdivided land minimum area: 2 acres (subject to Section 14.1 supplementary rules) · subdivided land without public water and public sewage: 30000 square feet (subject to percolation and supplementary rules) · subdivided land served by either public water or public sewage: 15000 square feet (subject to percolation and supplementary rules) · subdivided land served by both public water and public sewage: 7500 square feet (subject to percolation and supplementary rules)

    “For all uses permitted in the "M" district and individual mobile homes 1. On un-subdivided land two (2) acres 2. On subdivided land not served by public water and public sewage facilities - 30,000 sq. ft. 3. On subdivided land served by either public water or public sewage facilities - 15,000 sq. ft. 4. On subdivided land served by both public water and public sewage facilities - 7,500 sq. ft. [...] The "minimum area of lot" regulations shall be increased in any district where percolation tests show the soil incapable of handling the septic system required for the maximum population density of the proposed use.”
  • SetbacksSpecified

    Setbacks in Grand County zoning districts.

    • Setbacks vary by zoning designation and are measured from property lines.
    • For the majority of properties, the county FAQ states 30 feet front, 10 feet sides, and 20 feet rear.
    • The setback from any water body or waterway is 30 feet.

    front setback for majority of properties: 30 ft · side setback for majority of properties: 10 ft · rear setback for majority of properties: 20 ft · water body or waterway setback: 30 ft

    “For the majority of properties in Grand County the setbacks are 30' from the front, 10' from the sides and 20' from the rear.”
  • Building heightSpecified

    Buildings regulated by Grand County zoning regulations in unincorporated Grand County.

    • Height is measured vertically from the lowest elevation of finished grade to the highest point of the structure.
    • The maximum is 35 feet above finish grade when the finished-grade change within the building footprint is less than five feet.
    • The maximum is 40 feet above finished grade when the finished-grade change within the building footprint is five feet or greater.
    • Chimneys and weathervanes are excluded only when the height above the roof ridge does not exceed four feet and the projection is not wider than four square feet.
    • Decks are excluded from the structure-height calculation.

    maximum building height when grade change is less than five feet: 35 feet · maximum building height when grade change is five feet or greater: 40 feet

    “a. Maximum building height may not exceed 35 feet above finish grade, if less than a five-foot change in finished grade exists within the building’s footprint. b. Maximum building height may not exceed 40 feet above finished grade, if a five-foot (or greater) change in finished grade exists within the building’s footprint.”
  • Living in an RVLimited

    Non-commercial occupancy of a recreational camping vehicle or tent on private property in unincorporated Grand County.

    • Private camping is permitted only on property consisting of 35 acres or more.
    • Private camping is not allowed in Residential or Estate Zoned Districts, regardless of property size.
    • Use must be non-commercial and may involve only a recreational camping vehicle or tent; shipping or cargo containers may not be used as camping shelters.
    • A Temporary Special Use Permit is required in Business, Tourist, and Accommodations Districts.
    • Camping is limited to no more than 14 days during any consecutive three-month period on the same parcel.
    • All campers must be self-contained; utilities may not be extended to a camping unit; no compensation may be paid to the parcel owner; and no permanent structures or alterations are permitted.
    • Private camping is intended only as temporary recreational or leisure activity and may not be used as a dwelling, residence, or home.
    • Seasonal work crews, including hay crews and outfitting-type uses, are exempt only on Forestry and Open Zone District property; the stated intent is to support Grand County's Right to Farm and Ranch policy.

    minimum parcel area: >= 35 acres (seasonal work-crew exemption applies only on Forestry and Open property) · maximum private-camping duration: <= 14 days during any consecutive 3-month period

    “Private Camping is permitted on property consisting of 35 acres or more only, and subject to the following additional requirements. a. Private camping is not allowed in Residential or Estate Zoned Districts, regardless of the size of the property. b. Private camping is permissible only for non-commercial use of a recreational camping vehicle or tent. Under no circumstances are shipping/cargo containers to be used as a shelter for camping. c. A Temporary Special Use Permit is required for private camping in the Business, Tourist and Accommodations Districts. d. All private camping is subject to the following criteria: i. Private camping is limited to a period that does not exceed fourteen (14) days during any consecutive three (3) month period on the same parcel of property. ii. All campers must be self-contained. iii. Utilities shall not be extended to any camping unit. iv. There shall be no compensation to the owner of the parcel involved. v. No permanent structures or alterations shall be permitted. vi. Private camping is intended as a temporary recreational or leisure activity and shall not be utilized as a dwelling, residence, or home. Exemptions: Any seasonal work crews (such as hay crews and/or outfitting type uses) only on Forestry and Open Zone District property. The intent of this exemption is to support Grand County’s “Right to Farm and Ranch” policy.”
    One more reviewed finding on this topic
    • Temporary only (with conditions) — One recreational camping vehicle used during construction of an owner-built single-family dwelling in unincorporated Grand County.
      “One (1) recreational camping vehicle as defined by the Grand County Zoning Regulations for use during the construction of an owner built single-family dwelling. The recreational camping vehicle must be entirely self-contained, or must be connected to the well and septic, or water and sewer service for the property on which the single-family dwelling will be located. This accessory use is allowed for one (1) continuous year. The time period for this one (1) year allowance will begin with the Grand County Building Department’s footing inspection. This accessory use is not available until an approved building permit has been issued. Only one (1) continuous one (1) year period is allowed per building permit for a dwelling unit. At the end of the one (1) year period, the recreational camping vehicle must be removed if construction has not been completed, or the building permit will be rescinded. No extensions of this time period will be allowed.”
  • Tiny homesLimited

    Tiny-home or small dwelling occupancy in unincorporated Grand County, distinguishing code-compliant dwelling units from RVs or other temporary camping shelters.

    • The current zoning regulations define a dwelling unit as having at least 400 square feet of floor area measured on the outside walls.
    • A single-family dwelling must be on one lot, be arranged for no more than one family, and comply with the County building code.
    • The Planning Commission minutes state that a 400-square-foot home on a foundation is allowed in a zoned district that allows single-family dwellings.
    • A mobile tiny home treated as an RV or camper is subject to the County's temporary RV/camping restrictions rather than permanent dwelling occupancy.

    minimum dwelling-unit floor area: >= 400 square feet measured on outside walls (RV/camper rules may apply to mobile tiny homes treated as recreational vehicles)

    “mobile tiny homes fall under the same regulations as RV’s and campers. [...] someone can build a 400 square foot home”
  • Who permits septicCounty (with conditions)

    Onsite wastewater treatment systems in unincorporated Grand County.

    • The county Building Division reviews engineered designs, issues permits, and conducts field inspections under county-adopted OWTS regulations.
    “The Building Division reviews engineered designs, issues permits and conducts field inspections per the On-Site Wastewater Treatment System regulations adopted by Grand County.”
  • Septic permitRequired

    OWTS/septic systems in unincorporated Grand County.

    • An OWTS/septic permit application must be submitted via Cloudpermit.
    • The application requires an engineered and stamped design prepared by a Colorado registered professional engineer complying with currently adopted OWTS regulations.
    • A notarized Declaration of Covenants is required and must be reviewed and approved by Grand County Building Division staff.
    • The page states a $43 recording fee, payable directly to the County Clerk when the approved declaration is delivered.
    • Permit fee is $850 for a new OWTS or complete system replacement, or $400 for septic repairs.
    • Payment is completed online after the OWTS application is approved.
    • A septic permit does not represent that the system will meet the applicant's needs or operate effectively; plans are reviewed only for compliance with regulations currently in effect.

    new OWTS or complete system replacement permit fee: 850 USD · septic repair permit fee: 400 USD · recording fee: 43 USD (Paid directly to the Grand County Clerk when the declaration is delivered)

    “Submit an Onsite Wastewater Treatment System (OWTS)/Septic permit application via Cloudpermit. [...] The correct jurisdiction for all OWTS applications is UNINCORPORATED GRAND COUNTY.”
  • Septic inspectionRequired

    OWTS projects regulated by Grand County.

    • The Building Division conducts field inspections under county-adopted OWTS regulations.
    “The Building Division reviews engineered designs, issues permits and conducts field inspections per the On-Site Wastewater Treatment System regulations adopted by Grand County.”
  • Permit feesPublished (with conditions)

    Grand County building permits, plan checks, and OWTS/septic permits.

    • Building permit and plan-check fees are calculated under the fee schedule adopted by Grand County.
    • The applicant is advised of building fee costs after plan checking.
    • Building permit calculations are based on structure square footage and total project valuation.
    • All fees must be paid before issuance of the building permit.
    • The official septic page publishes $850 for new OWTS or complete replacements and $400 for septic repairs, plus a $43 recording fee for the covenant.

    new OWTS or complete replacement permit fee: 850 USD · septic repair permit fee: 400 USD · septic covenant recording fee: 43 USD

    “Building permits and plan check fees for building permits are calculated in accordance with the fee schedule adopted by Grand County. You will be advised as to fee costs upon completion of plan checking. Permit fee calculations are based on the square feet of the structure, and a total valuation of the project.”
  • Permit processPublished (with conditions)

    County building-permit, OWTS, planning, and inspection processes.

    • Building applications are submitted online.
    • Planning and Zoning pre-check is completed upon submittal and does not move forward until all information is received.
    • Payment and signed plan notes are required before building-permit issuance.
    • The permit packet is brought to the jobsite at the first inspection.
    • OWTS applications are submitted online and require engineered designs and county review.
    “All permit applications are now submitted online.”

Colorado rules that apply here

  • Manufactured homesAllowed (with conditions)

    Installation and resulting residential use of HUD-code manufactured homes and mobile homes in Colorado, subject to Colorado Division of Housing requirements and local zoning or building requirements.

    • HUD homes must be certified by the applicable State Administrative Agent for installation in Colorado; imported units are monitored by the State Administrative Agent of the state from which they are imported, rather than necessarily by Colorado's SAA.
    • A HUD home may be installed anywhere in Colorado only where local zoning allows it.
    • Local jurisdictions may require site mitigation to meet local wind and snow loads, but the mitigation cannot directly affect or change the construction of the home itself.
    • The Division of Housing regulates installation and installation inspections for HUD homes; mobile-home foundation and structural construction requirements are regulated by local jurisdictions with active building departments.
    • The state minimum HUD design criteria listed by the source are Wind Zone 1, Thermal Zone 3, and Middle Roof Load Zone (30 psf).

    wind zone: 1 zone · thermal zone: 3 zone · roof load zone: 30 psf (Middle Zone)

    “HUD homes [...] can be installed anywhere in Colorado as long as the local zoning allows for it.”
  • Accessory dwellingsAllowed (with conditions)

    One accessory dwelling unit as an accessory use to a single-unit detached dwelling in a Colorado subject jurisdiction where single-unit detached dwellings are allowed.

    • The rule applies to a subject jurisdiction: either a municipality with a population of at least 1,000 within a metropolitan planning organization, or the portion of a county within a census-designated place of at least 40,000 people that is also within a metropolitan planning organization.
    • The subject jurisdiction must allow the ADU through an administrative approval process.
    • The rule applies on or after June 30, 2025.
    • The state requirement does not establish that every Colorado municipality or county area is a subject jurisdiction.

    maximum required ADUs per single-unit detached dwelling: 1 unit · effective date: >= 2025-06-30 · qualifying municipality population: >= 1000 persons (municipality must also be within a metropolitan planning organization) · qualifying census-designated-place population: >= 40000 persons (county portion must also be within a metropolitan planning organization)

    “Section 1 requires a subject jurisdiction, on or after June 30, 2025, to allow, subject to an administrative approval process, one accessory dwelling unit”
  • Off-grid sanitationLimited

    Sanitation for dwellings and occupied structures statewide that is provided without connection to a sewage treatment works.

    • The structure must have adequate facilities for sanitary disposal of sewage.
    • An OWTS may be used subject to applicable permit, inspection, construction, installation, alteration, and use requirements.
    • Construction of new cesspools is prohibited.
    • Septage removed during maintenance or cleaning must be disposed of at an approved site and in an approved manner.
    “No person shall construct or maintain any dwelling or other occupied structure that is not equipped with adequate facilities for the sanitary disposal of sewage.”
  • Well permitRequired

    Every new groundwater-diverting well in Colorado, including residential wells, subject to statutory exemptions and basin-specific rules.

    • The Division of Water Resources administers groundwater permitting and issues permits.
    • Applicants must complete the appropriate application and pay the associated fee.
    • Statutory exemptions and additional Denver Basin or Designated Basin rules may affect the requirement or permit conditions.
    • In many areas, a well may also require an augmentation plan if its priority is not sufficient to divert in priority.

    complete-application review time: <= 49 days (DWR states review of complete new and replacement applications may take up to 49 days)

    “Every new well in the state that diverts groundwater must have a well permit.”
  • Mandatory utility hookupConditional

    Residential or other occupied structures statewide that are not serviced by a sewage treatment works.

    • Colorado law conditions building and occupancy permitting on either service by a sewage treatment works or an approved OWTS process.
    • If the structure is not serviced by a sewage treatment works, the local public health agency must issue the OWTS permit before building construction or remodeling approval, and must complete a final inspection and approve the installation before occupancy approval.
    • This claim does not establish a universal statewide mandate to connect to a particular municipal water or sewer provider.
    “A permit to construct or remodel a building or structure that is not serviced by a sewage treatment works until the local public health agency has issued a permit for an on-site wastewater treatment system;”
  • Subdividing landRegulated (with conditions)

    Division of land and creation of interests subject to Colorado county subdivision law.

    • Divisions creating parcels of at least 35 acres each are excluded when none is intended for use by multiple owners.
    • Additional statutory exclusions include certain 35-acre-per-interest divisions, court or eminent-domain divisions, security instruments, investment entities, cemetery lots, severed mineral or water interests, certain joint-tenancy or tenancy-in-common interests, parcel combinations, contingent sale contracts, and cluster developments.
    • A board of county commissioners may exempt a division from the subdivision definition by rule, regulation, or resolution if it determines the division is not within the purposes of the subdivision statute.
    • Local county subdivision regulations and review procedures still determine administration.

    parcel-size exclusion: >= 35 acres (Each parcel must be at least 35 acres and none may be intended for use by multiple owners.) · minimum area per interest for listed exclusion: >= 35 acres per interest (Subject to the statutory exceptions and anti-evasion language.)

    “"Subdivision" or "subdivided land" means any parcel of land in the state which is to be used for condominiums, apartments, or any other multiple-dwelling units, unless such land when previously subdivided was accompanied by a filing which complied with the provisions of this part 1 with substantially the same density, or which is divided into two or more parcels, separate interests, or interests in common, unless exempted under paragraph (b), (c), or (d) of this subsection (10).”
  • Driveway accessRequired

    Direct residential access from a property to a Colorado state highway, and construction, relocation, closure, modification, or change in use of access points to state highways.

    • Direct access from a house to a state highway requires an access permit.
    • Some state-highway access categories require access from a lesser street or by easement from a parent parcel whenever possible.
    • Level 1 permits cover single-family residential/agricultural permits; Level 2 covers commercial property and developments exceeding 20 vehicular trips per day without roadway improvements; Level 3 covers commercial property requiring roadway improvements.
    • Level 1 fees are $50, Level 2 fees are $100, and Level 3 fees are $300.
    • No fees are charged to local government applications or political subdivisions.
    • There is no upfront charge to review an Access Permit Application.
    • The permittee is responsible for roadway-improvement costs required with issuance of an access permit.
    • Performance-bond requirements apply only to private projects; local agencies are not required to comply, although CDOT regions may require a bond at their discretion.

    Level 1 access permit fee: 50 USD (Single-family residential/agricultural permits) · Level 2 access permit fee: 100 USD (Commercial property permits and developments exceeding 20 vehicular trips per day without roadway improvements) · Level 3 access permit fee: 300 USD (Commercial property permits requiring roadway improvements)

    “If you want the house to have direct access off of the state highway, then you will need an access permit.”
  • 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.”
  • Short-term rentalsLimited

    Short-term rentals statewide, defined in the cited official source as lodging-unit rentals for fewer than 30 days.

    • There is no statewide STR regulatory scheme.
    • Boards of county commissioners may license and regulate STR owners or agencies and set license fees, terms, issuance, and revocation procedures.
    • Home-rule municipalities and private contracts or homeowners' association covenants may impose additional restrictions.

    maximum rental duration for STR definition: < 30 days

    “There are no statewide regulations regarding STRs. As established through House Bill 20-1093, state law allows for boards of county commissioners (BOCCs) to license and regulate an owner or owner’s agency and to fix the fees, terms, and manner for issuing and revoking licenses.”
  • 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 in Grand County zoning districts.
  • Camping on your land — Temporary camping on private land in unincorporated Grand County.
  • Agricultural exemption — Agricultural exemptions from building or land-use requirements in unincorporated Grand County.

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 Grand County, Colorado

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

Grand County scores 57/100 on the Bolthole Index, a solid county profile. Its strengths: a stronger property-autonomy legal backdrop and manageable long-term carry cost. Watch-outs: thin water margin (22.6″/yr rainfall) and elevated current hazard exposure.

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

Grand County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Grand County Building & Sanitation Division (Grand County Sanitarian). 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 Grand County?

Living in an RV on your own land in Grand County is allowed on a temporary basis only: One recreational camping vehicle used during construction of an owner-built single-family dwelling in unincorporated Grand County. Only one recreational camping vehicle is allowed per building permit for a dwelling unit. The vehicle must be entirely self-contained or connected to the property's well and septic or water and sewer service. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Grand County, Colorado?

Land in Grand County runs about $2,754 per acre, based on the latest county data.

What is the water situation in Grand County?

Grand County gets about 22.6" of rain a year, with severe drought in roughly 16.4% of years.

How remote is Grand County?

A typical private-land location has about 3,605 people within 15 miles and 4,797,068 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Grand compares in Colorado

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