Jefferson County, CO Accessory Structures: Tiny Homes (2026)
Tiny home rules in Jefferson 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
- Container homes
- Allowed if code-compliant
- Setbacks/height
- Per zone district
- Building code
- Must meet building code
- Second unit
- Treated as an ADU
- Recommendation
- Consult Building Safety
Summary
Jeffco allows shipping containers or conex boxes as the building blocks of a home if they meet zone-district setbacks, building height, and full building-code requirements. A permanent tiny home is treated like any dwelling; a detached one used as a second residence must meet the ADU rules.
You could use shipping containers or conex boxes as the building blocks of a home so long as you meet the required property line setbacks and building height requirements of your zone district. However, the structure will need to meet building code requirements.
Full Breakdown
Jefferson County's Mini-Structures guide states that shipping containers or conex boxes may be used as the building blocks of a home so long as you meet the required property-line setbacks and building-height requirements of your zone district, and the structure meets building-code requirements. A tiny house on a permanent foundation is regulated as a single-family dwelling; a detached tiny home serving as a second unit falls under the ADU provisions (Section 19.D), including the owner-occupancy, lot-size, and one-ADU-per-property limits. Jefferson County does not have a stand-alone "tiny home" ordinance separate from its dwelling, ADU, and building-code standards.
Violations & Fines
Occupying a tiny home or container dwelling without a building permit and code-compliant construction is a zoning/building violation under C.R.S. 30-28-124; the County may require removal or bring it into compliance.
Frequently Asked Questions
Can I live in a shipping container home in unincorporated Jeffco?
Is a detached tiny home an ADU?
Sources & Official References
Other rules in Jefferson County
Compare Jefferson County to another location·View the Colorado accessory structures overview
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