Bolthole Index county-legal census · checked 2026-09-26
2 of Colorado's 64 counties — 3% — set no minimum dwelling size. That is the 16th-largest count of any state. The strongest of them on the Bolthole Index is Park County (58/100). 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 423 counties nationwide → Colorado: no building codes → Colorado: no zoning → Colorado: no codes, no zoning → Colorado: owner-builder → Full Colorado profile →
2 of 64 Colorado counties · sorted by Index score
Residential structures under Park County zoning regulations. The county FAQ states there is no minimum square-footage requirement; the FAQ separately directs applicants to IRC S…
Planning and Zoning FAQs ↗Single-family homes in unincorporated Gilpin County. The home must still comply with building code and zoning regulations. Total structure coverage may not exceed 25%.
Planning & Zoning ↗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.
