Tiny home rules in Menifee, 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.
Menifee allows tiny homes only as Accessory Dwelling Units (ADUs) under Development Code §9.295.020 implementing Gov. Code §65852.2 — they must be on a permanent foundation, meet California Residential Code, and conform to the 1,500 sq ft ADU maximum (no minimum). Tiny homes on wheels (THOWs) are treated as RVs under Health & Safety Code §18009.3 and cannot be used as permanent residences except in licensed RV parks.
Menifee Development Code §9.295.020 (Chapter 9.295 Special Housing Types, adopted Dec 18, 2019) is the primary pathway for tiny homes — they qualify as ADUs if they meet California Residential Code (CRC) on a permanent foundation. ADU minimum size in California is set by CRC §R304 (efficiency dwelling units may be as small as 150 sq ft of living area). Menifee's ADU rules per §9.295.020: 4-foot side/rear setbacks, 18-foot height for detached, 1,500 sq ft maximum, ministerial approval within 60 days, no replacement parking, impact fees waived under 750 sq ft. The Menifee Permit Ready ADU Program offers pre-approved studios as small as 306 sq ft. Tiny Homes on Wheels (THOWs) built to ANSI A119.5 (RV) or NFPA 1192 standards are 'recreational vehicles' under Cal. Health & Safety Code §18009.3 and §18010, regulated by HCD — they are NOT permitted as permanent dwellings on a single-family lot. THOWs may be parked in licensed RV parks under Title 25 CCR. Movable tiny houses built to ANSI Z240 manufactured home standards may qualify as manufactured homes under HSC §18007. Junior ADUs (JADUs) under §9.295.020 must be within the existing primary dwelling and capped at 500 sq ft — generally not a tiny-home pathway since they require an interior connection. SB 9 (Gov. Code §65852.21) two-unit developments can include compact units but require permanent foundations.
Living in a tiny home on wheels (THOW) parked on a single-family lot violates Title 9 zoning use regulations and Health & Safety Code §18009.3. Penalties include code enforcement abatement orders, daily fines under Title 1 general penalty, and possible utility disconnection. Building an ADU-style tiny home without ministerial permit triggers double permit fees and possible removal. Operating a tiny home as a short-term rental under 30 days violates §9.295.020.
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