Unincorporated Gunnison County, Colorado requires a building permit for construction and other work regulated by its adopted codes, while cities and towns run their own building-code jurisdictions12. Unlike most counties around it in Colorado, Gunnison County has no county zoning3, but parcel changes and uses generally require a Land Use Change Permit4. Septic permits in unincorporated areas come from county Environmental Health5.
At a glance
- Building permit
- Required before regulated work begins in unincorporated Gunnison County1
- Tiny homes
- No county zoning-based occupancy restriction; building and site rules still apply61
- Zoning
- No zoning districts; parcel changes and uses generally require Land Use Change Permits7
- Septic permits
- Required before construction or repair; issued by county Environmental Health85
- Driveway access
- An access permit or written waiver is needed before a building permit can issue9
- RV camping
- Limited to 14 total days per consecutive three months without a Long-Term Camping Permit10
- Minimum lot size
- Generally 35 acres, with listed exceptions and a permit path for smaller lots11
- Home setbacks
- Single-family sites generally use 25-foot front and 15-foot side and rear setbacks12
Who to call
Building permits
Gunnison County Community and Economic Development Department
Building permits, onsite wastewater treatment system permits, land use change permits, permit review and permit-status searches
221 N. Wisconsin St., Gunnison, CO 81230
Roads & driveways
Gunnison County Public Works Department
Access, reclamation, utility, right-of-way and oversize-load permits for county roads and rights-of-way
publicworks@gunnisoncounty.org
195 Basin Park Drive, Gunnison, CO 81230
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 Gunnison County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in Gunnison County, Colorado?
Yes. Unincorporated Gunnison County requires a building permit to construct, enlarge, alter, repair, move or change the occupancy of a building or structure, and regulated work must be permitted before it begins1. The county administers amended 2021 International Codes in unincorporated territory; cities and towns have separate building-code jurisdictions2.
A narrow exemption may apply to a one-story detached accessory structure without utilities that is under 200 square feet and accessory to a dwelling on the same parcel1. A qualifying agricultural structure may request an exemption only when it meets the county definitions for both an agricultural structure and an agricultural operation13. Do not assume a shed, barn or owner-built house is automatically exempt: Colorado law lets an owner repair or maintain their own property without a contractor license, but that does not exempt new construction from a county building permit14, and we could not confirm any owner-builder exemption on the county's own pages. Ask the Building Office before you start.
Who is the Gunnison County building department, and how do you reach it?
Gunnison County Community and Economic Development is the building, planning and environmental-health contact at 221 N. Wisconsin St., Gunnison, CO 81230, phone (970) 641-0360 and email planning@gunnisoncounty.org15. The department issues building, onsite wastewater treatment system and land-use-change permits, and its online database shows pending and issued permits in those categories15.
The Building Office routes construction documents through Planning, Building, Environmental Health, Wildlife Conservation and Public Works; those reviews cover permitted uses, setbacks, lighting, height, construction, septic design, sage-grouse habitat, reclamation and driveways15. Gunnison County publishes fee schedules, and charges vary by permit type and project16. For a parcel inside a city or town, contact that municipality because the county building-code claim is limited to unincorporated Gunnison County2.
Does Gunnison County have zoning?
Gunnison County has no zoning7. Inside the Town of Crested Butte, the town sets its own zoning17; we could not confirm who issues building permits there, so ask the town. The county rules on this page apply to unincorporated Gunnison County. The county has no zoning districts, but unincorporated land is not unrestricted: parcel changes and uses generally require a Land Use Change Permit approving the specific use418. Because the county has no zoning ordinance, it sets no zoning-based lot-coverage, building-height or tiny-home occupancy limit6. Building permits, adopted codes, setbacks and use-specific approvals still apply112.
The general minimum permitted lot size is 35 acres unless a smaller lot qualifies under a listed exception or is authorized through a Land Use Change Permit; new residential subdivisions generally require one-acre lots unless served by public wastewater treatment11. For a single-family residence, the standard setbacks are 25 feet at the front and 15 feet at the sides and rear, subject to exemptions, variances and project-specific rules12. The county sets no separate numeric minimum dwelling floor area in the cited provision; the adopted building code supplies the minimum19.
How do septic and well permits work in Gunnison County?
Gunnison County Environmental Health administers onsite wastewater rules in unincorporated areas; Pitkin and Marble use their own municipal OWTS regulations5. In unincorporated Gunnison County, Environmental Health must issue a permit before a septic system is constructed or repaired8. A building permit also requires either an OWTS permit or an agreement from the wastewater-treatment provider serving the parcel20.
The county's OWTS rule generally requires a contiguous parcel of at least one acre, subject to its stated exceptions21. Sewage or wastewater from a camping shelter may be disposed of only under an OWTS permit and applicable standards, and compliance may require a long-term OWTS on the parcel22. The county inspects the site before construction to confirm the system can be built to Colorado and county rules, and inspects the completed system afterward23. Only about 1.6% of Gunnison County soils are rated without severe limits for a conventional drain field, so make septic feasibility an early purchase contingency24. A new groundwater well requires a Colorado permit, subject to statutory exceptions and basin-specific rules25.
Can you live in an RV or tiny home on land in Gunnison County?
On an individual parcel in unincorporated Gunnison County, an RV or other camping shelter may be used for no more than 14 total days during any consecutive three months without a Long-Term Camping Permit26. Longer camping requires that permit, which may run for no more than 180 days, and only one may be issued per calendar year10. Camping cannot occupy a public road or right-of-way, must comply with covenants, and must use lawful wastewater disposal2722.
Unincorporated Gunnison County has no zoning-based restriction on tiny-home occupancy, but a tiny home still must meet applicable building, wastewater, setback and land-use requirements612012. A state-regulated tiny home intended for long-term residence must also meet Colorado approval, construction and site-certification requirements28. Gunnison County also allows a secondary detached residence or sleeping structure on a parcel if it is smaller than the primary residence, and an integrated secondary residence may not exceed 1,200 square feet29. Gunnison County allows a manufactured home on an individual parcel if it is at least 24 feet wide and 36 feet long, uses an engineered permanent foundation, has qualifying siding and a pitched roof, and carries the required federal certification30. The engineered foundation must be certified by a Colorado-licensed professional engineer and approved by the Building Inspector, and both building and onsite wastewater permits are required31.
Building a home in Gunnison County: the steps, in order
- Ask Community and Economic Development to confirm legal-lot status, the proposed use, the applicable setbacks and any Land Use Change Permit41215.
- Establish wastewater service by obtaining an OWTS permit or an agreement from the wastewater-treatment provider before the building permit can issue20.
- Obtain the county access permit or written waiver before the building permit, and do not begin driveway excavation or construction first9. Public Works handles county-road access permits32.
- If the site lies in the 100-year floodplain, submit the floodplain application before excavation, filling, stream work, fencing or construction34.
- Ask the Building Office which inspections and final occupancy approval apply, because the complete county inspection sequence and a general certificate-of-occupancy rule could not be confirmed15.
What should you check before buying land in Gunnison County?
Start with the buildable envelope: only about 17.5% of Gunnison County land has a slope of 15% or less, and only about 1.6% of soils are rated without severe limits for a conventional septic drain field3524. Confirm legal-lot status, use approval, setbacks, wastewater feasibility and driveway access before assuming an advertised homesite can be developed3612209.
About 79.7% of the county is federal land, so map parcel boundaries and legal access rather than assuming neighboring open ground is part of the tract37. Development in the 100-year floodplain may require a county permit before structures, excavation, filling, stream alteration or fences, and regulatory-floodway work requires an engineer's no-rise certificate34. Direct access from a house to a state highway requires a Colorado access permit38. Gunnison County's effective property-tax rate is about 0.3%, with a median annual property-tax bill of about $1,6833940.
Watch-outs
- No county zoning does not mean no land-use review in Gunnison County; parcel changes and uses generally require a Land Use Change Permit approving the specific use without creating a zoning district4.
- Only about 1.6% of county soils are rated without severe limits for a conventional septic drain field, so obtain site-specific wastewater approval early2420.
- A county access permit or written waiver is required before a building permit can issue, and access excavation or construction cannot start first9.
- RV camping beyond 14 total days in any consecutive three months requires a Long-Term Camping Permit, and lawful wastewater disposal still applies1022.
- We could not confirm which inspections the Building Office requires or whether a certificate of occupancy is issued, so ask Community and Economic Development before closing on land15.
Sources
- Building Permit, quoted and re-checked
- Building Codes, quoted and re-checked
- Land Use Change Permits (2026 county census)
- Land Use Change Permits, quoted and re-checked
- Environmental Health & OWTS, quoted and re-checked
- Colorado law on county zoning and building authority
- Land Use Change Permits, quoted and re-checked
- On-Site Wastewater Treatment System (OWTS) Permits, quoted and re-checked
- OWTS Permit Application, quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- Building Permit, quoted and re-checked
- Colorado Revised Statutes 2026, Title 30, § 30-11-125 (Colorado statewide rule), quoted and re-checked
- Gunnison County Community and Economic Development Department (gunnisoncounty.org)
- Application Forms, quoted and re-checked
- Town of Crested Butte: Crested Butte Code Sec. 16-1-20 Definitions (Gunnison County), quoted and re-checked
- Land Use Change Permits, quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- OWTS Permit Application, quoted and re-checked
- On-Site Wastewater Treatment System (OWTS) Permits, quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- gunnisoncounty.org, quoted and re-checked
- 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
- Water Administration (Colorado statewide rule), quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- Manufactured Homes, quoted and re-checked
- Gunnison County Land Use Resolution, quoted and re-checked
- Gunnison County Public Works Department (gunnisoncounty.org)
- Application Forms, quoted and re-checked
- Floodplain Development, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Land Use Change Permits, quoted and re-checked
- Federal land share: Bolthole Index county data
- Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
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.