What are the tiny house laws in Colorado?

Colorado allows tiny homes as long-term residences through its approval process¹. For a Division of Housing-regulated home, you need construction plans approved before building begins¹. Your home must meet the applicable state-adopted standards and local zoning rules¹.

Colorado's state construction approval does not replace the local zoning decision¹. Ask the planning office whether your proposed use is allowed at the exact address. Ask the Division of Housing which approval process fits the home you intend to buy. Read the Division's consumer guidance and call its office with questions about site certification¹.

Colorado's provision on county housing standards sets no numeric minimum floor area². Colorado allows counties to set minimum floor space, foundation and setback standards in specific use districts². Those standards must also apply to comparable existing housing or new site-built housing in that district².

Check your district's rules before choosing a floor plan. Ask the local planning office for the minimum dwelling area and the foundation standards that apply to your home. Ask the building office which residential code and tiny-house provisions apply to your design. Local governments make most building-code adoption decisions in Colorado outside the state-facility context⁵.

Wheels alone do not determine whether you can live in a tiny home in Colorado¹. State-regulated tiny homes have an approval process for long-term living, but your home still needs to meet local zoning rules¹. Colorado county rules also distinguish homes on foundations from homes on wheels⁶.

For example, Routt County allows tiny homes on permanent foundations, with building and planning conditions⁶. In Larimer County, you can use a tiny home on wheels as an accessory living unit on an approved temporary foundation⁶. In Boulder County, dwelling structures need permanent foundations rather than wheels or trailers⁶. Ask the local planning office to classify your exact home before you arrange delivery. Describe its foundation, how you intend to live there and whether another home already occupies the parcel.

Colorado requires ADU approval in qualifying jurisdictions, so your address matters³. Since June 30, 2025, those jurisdictions must allow an accessory dwelling alongside a single-unit detached home through administrative approval³. Qualifying municipalities need at least 1,000 residents and a location within a metropolitan planning organization³. Covered county areas must fall within qualifying census-designated places of at least 40,000 residents, also within a metropolitan planning organization³.

Colorado's ADU requirement does not mean every county area qualifies³. Ask the planning office whether your address falls within a jurisdiction covered by the law. Then ask which tiny-house designs can meet the local ADU standards. Ask separately about permission for an accessory dwelling and permission for a principal home.

Check wastewater approval early in your Colorado tiny-home plans. If sewage treatment works do not serve your home, the local public health agency issues the on-site wastewater treatment system permit⁴. You need that approval before approval for building construction or remodeling⁴. You need final inspection and approval of the septic installation before occupancy approval⁴.

If you relocate a state-regulated tiny home in Colorado, it must meet the destination site's design criteria¹. Design differences can require revisions before you install the home at its new location¹. Before you pay a deposit, ask the Division of Housing about the home's site certification. Ask local planning about the dwelling use and foundation, then ask public health about wastewater approval. Ask for separate estimates for construction review, site work and septic approval.