Tiny home rules in Moorpark, CA — 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.
Unincorporated Ventura County has no standalone tiny-home ordinance. A foundation tiny house is reviewed as an ADU under NCZO Sec. 8107-1.7 (detached, up to 850 sq ft by building permit, 16-ft height, 4-ft setbacks). A tiny house on wheels is treated as an RV or manufactured home and cannot be a permanent dwelling outside an approved RV or mobilehome park.
Ventura County does not publish a dedicated tiny-home ordinance; tiny houses are regulated by their construction type. A tiny house built on a permanent foundation as a small secondary dwelling is processed as an ADU under NCZO Sec. 8107-1.7. By the building-permit pathway (Sec. 8107-1.7.4(b)) a new detached unit must not exceed 850 square feet, must keep 4-foot side and rear setbacks, and is capped at 16 feet above grade. There is no minimum lot size for an ADU (Sec. 8107-1.7.5(f)), and approval is ministerial under Sec. 8107-1.7.7. A movable tiny house on wheels does not meet the definition of a permanent dwelling; under the NCZO, manufactured homes are defined by Health & Safety Code Sec. 18007, and recreational-vehicle and mobilehome occupancy is confined to approved Recreational Vehicle Parks and Mobilehome Parks (NCZO Sec. 8107-7). Living full-time in an RV or movable tiny house on a standard residential parcel is therefore not authorized. Anyone planning a tiny dwelling should confirm with the Planning Division whether it will be permitted as an ADU, a manufactured home, or an RV, since each path carries different standards. Because state ADU law (Gov. Code 66310 et seq.) preempts local rules, a foundation-built tiny home meeting ADU standards receives the same ministerial, 60-day approval as any other ADU.
Placing a tiny house on wheels as a permanent residence on a residential parcel outside an approved RV or mobilehome park, or building a foundation tiny home without the ADU building permit or Zoning Clearance, is a zoning violation subject to code enforcement and possible removal.
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