Tiny home rules in Cedar Park, TX — 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.
Cedar Park has no separate 'tiny home' permitting track. A tiny dwelling on a permanent foundation must meet the city's minimum dwelling size (450 sq ft) and full IRC building code; tiny homes on wheels (RVs/THOWs) are treated as recreational vehicles and cannot be used as a permanent residence on a residential lot.
Cedar Park's Code of Ordinances Chapter 11 (Zoning) and adopted residential building code regulate small dwellings the same way they regulate any other single-family home. Dwelling units must be a minimum of 450 square feet of living area, and any tiny home on a permanent foundation must obtain a building permit, comply with the adopted International Residential Code (foundation, egress, energy, plumbing, mechanical, electrical), and meet the principal-dwelling design standards in Chapter 11, Article 11.04, Division 6 (façade, roof pitch, materials, porch). An accessory dwelling unit (ADU) — including a 'backyard tiny home' on a permanent foundation — must be 400–600 sq ft livable / 650 gross sq ft, located in the rear yard of the principal dwelling, and is allowed only as a conditional use in Development Reserve, Estate Reserve, Estate Residential, and Suburban Residential districts; it shall not be in a detached garage conversion (Art. 11.04, Div. 4). Tiny homes on wheels (THOWs) are classified as recreational vehicles under Chapter 11 definitions and Texas Transportation Code, and may not be occupied as a permanent dwelling on a residential lot — they may only be parked/stored consistent with the city's RV parking rules and may not be hooked to permanent utilities for long-term occupancy. Texas HB 2127 ('Death Star' preemption, 2023) and SB 673 (89th Leg., 2025) do not override life-safety building code or the minimum-dwelling-size rule.
Living in an unpermitted tiny structure or RV on a residential lot is a zoning and building code violation. Each is a Class C misdemeanor under §1.01.009 with fines up to $500/day (up to $2,000/day for health/safety code violations under Tex. Loc. Gov't Code §54.001). The city may disconnect utility service to an unpermitted dwelling, issue stop-work orders, refuse a Certificate of Occupancy, and pursue civil abatement. Williamson County Health may separately act if on-site sewage facilities are involved.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Cedar Park, TX
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