Bolthole Index

Bolthole Index county-legal census · checked 2026-11-06

Colorado Counties With No Building Codes and No Zoning

1 of Colorado's 64 counties — 2% — require no residential building permit and have no county-wide zoning in their unincorporated areas. That is the 22nd-largest count of any state. The strongest of them on the Bolthole Index is Baca County (43/100). Every entry below cites the county’s own official source.

Rules change, and cities inside these counties set their own — treat this as a verified starting point, not legal advice. All 515 counties nationwide → Colorado: no building codes → Colorado: no zoning → Colorado: owner-builder → Colorado: tiny homes → Colorado: no minimum home size → Full Colorado profile →

From the Colorado guide

Which Colorado counties don't require a building permit?

Montezuma County, Dolores County and Baca County are the 3 Colorado counties listed without a residential building-permit requirement.

Montezuma County, Dolores County and Baca County are the 3 Colorado counties listed without a residential building-permit requirement2. Another 4 counties have limited requirements: Delta County, Yuma County, Kit Carson County and Prowers County; keep these separate from the no-building-permit category1. The remaining 57 counties require residential building permits1. Use the Colorado no-building-codes list as a starting point, then open the county guide for the permit scope2.

Colorado county building-code authority applies to designated unincorporated areas, and local governments drive most building-code decisions12. Colorado is a local-control state: the State Buildings Program code and inspection rules cover state-owned facilities, not a uniform building-code adoption or permit process for private homes3,13,14,15. The owner repair-or-maintenance exemption from county contractor licensing does not establish a statewide exemption for new-home construction9. Use the owner-builder county list to find local exemptions, then confirm whether the exemption covers the proposed work9.

Which Colorado counties have no zoning?

Gunnison County, Saguache County and Baca County are the 3 counties listed without countywide zoning; 61 Colorado counties have zoning.

Gunnison County, Saguache County and Baca County are the 3 counties listed without countywide zoning; 61 Colorado counties have zoning1,4. Baca County is the only county listed with both no residential building-permit requirement and no countywide zoning6. Compare the no-zoning list with the no-building-codes-and-no-zoning list4,6.

Colorado county zoning authority concerns unincorporated territory and can regulate building size, lot coverage, lot size and land uses12. The state sets no single minimum lot size, so minimum lot sizes must be obtained from the applicable county zoning resolution and district map3. A lack of countywide zoning does not remove Colorado’s septic permitting requirements or applicable floodplain development standards5,16. For a small dwelling, start with the no-minimum-home-size list and ask the county planning office for the parcel’s applicable building-size rules12.

Building-height limits and short-term-rental rules are also local. Municipal zoning sets height by district, with no statewide numeric limit17. Colorado has no statewide short-term-rental scheme: county commissioners may license and regulate rentals of fewer than 30 days, and home-rule cities and HOA covenants can add limits18.

Read the full Colorado guide →

Sources

14 official pages, each quoted and re-checked · written October 15, 2026

  1. Bolthole Index county rulebook, 64 Colorado counties, as of November 6, 2026: Colorado counties that require a residential building permit in unincorporated areas
  2. Bolthole Index county rulebook, 64 Colorado counties, as of November 6, 2026: Colorado counties that do not require a residential building permit in unincorporated areas
  3. Colorado: Land Use Planning and Regulation in Colorado
  4. Bolthole Index county rulebook, 64 Colorado counties, as of November 6, 2026: Colorado counties with no county-wide zoning
  5. Colorado: Title 25 - Public Health and Environment - Colorado Revised Statutes 2024
  6. Bolthole Index county rulebook, 64 Colorado counties, as of November 6, 2026: Colorado counties with neither a residential building permit nor county-wide zoning
  7. Colorado: Colorado Revised Statutes 2026, Title 30, § 30-11-125
  8. Colorado: Colorado Revised Statutes 2025 Title 30 Government - County
  9. Colorado: Land Use Planning and Regulation in Colorado
  10. Colorado: Approved State Building Codes
  11. Colorado: Building Code Compliance Policy
  12. Colorado: SB24-179 Floodplain Management Program
  13. Colorado: Colorado Revised Statutes 2024, Title 31 — Government - Municipal
  14. Colorado: Short-term Rental Regulation

From the Colorado guide, written from the cited official sources and re-checked by an independent reviewer. This is research, not legal advice: confirm with the office before you buy or build.

1 of 64 Colorado counties · sorted by Index score

Keep exploring

Every county here has a full profile — water, land prices, hazard safety, seclusion, and the rest of its building rules. See the Colorado state page for all 64 counties ranked, or go back to the national list.

Off-grid gear

Building on land in one of these Colorado counties? The kit we'd start with:

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General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.