Douglas County, CO Accessory Structures: Tiny Homes (2026)
Tiny home rules in Douglas County, CO, covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds, determine where they are legal and how they get permitted.
Key Facts
- On a foundation
- Treated as a dwelling
- Building code
- 2021 IRC applies
- On wheels
- Treated as RV/mobile home
- Mobile home in A-1
- Caretaker use only
- Permanent RV living
- Not allowed in residential zones
Summary
Douglas County has no tiny-home-specific ordinance. A tiny house on a permanent foundation must meet the 2021 building code and zoning like any dwelling. A tiny house on wheels is treated as an RV or mobile home and cannot be a permanent residence outside the MH district.
Residence ... Caretaker – one (1) per lot: Mobile home, when a principal single-family dwelling exists on the lot. Principal – one (1) single-family dwelling or one (1) group home per lot (excluding mobile home).
Full Breakdown
A stick-built or modular tiny house on a permanent foundation is regulated as a single-family dwelling: it needs a building permit, must meet the 2021 IRC, and must satisfy district setbacks and minimum lot sizes. A tiny house on wheels is legally an RV and is not a permitted permanent dwelling in residential zones. Under Section 302.10, the A-1 district allows a mobile home only as a caretaker residence when a principal single-family dwelling already exists; converted mobile homes are otherwise limited to the MH zone district. Incorporated towns set their own rules.
Violations & Fines
Occupying an RV or tiny house on wheels as a permanent residence, or building without a permit, is a zoning violation subject to enforcement and abatement.
Frequently Asked Questions
Can I live in a tiny house on wheels on my lot?
Is a foundation-built tiny home allowed?
Sources & Official References
Other rules in Douglas County
Compare Douglas County to another location·View the Colorado accessory structures overview
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