Baytown, TX Accessory Structures: Tiny Homes (2026)

Baytown's zoning and building codes do not include specific provisions for tiny homes. Any dwelling on a permanent foundation must comply with the International Residential Code as adopted by the city. The IRC requires at least one habitable room of no less than 120 square feet with additional rooms at least 70 square feet. Minimum ceiling height is 7 feet for habitable rooms. The dwelling must have a compliant bathroom with toilet, lavatory, and bathtub or shower. A kitchen with cooking appliance, sink, and counter space is required. Emergency egress windows are mandatory in sleeping rooms. Electrical, plumbing, and mechanical systems must meet code. These minimum standards effectively establish a floor size of approximately 200 to 400 square feet for the smallest code-compliant dwelling. Tiny houses on wheels (THOWs) are classified as recreational vehicles under Baytown's zoning ordinance and are subject to the RV parking and storage restrictions. THOWs cannot be used as permanent residences in residential zones. They may be stored on the property subject to RV parking rules but cannot be connected to utilities for dwelling purposes. THOW manufacturers should build to ANSI 119.5 or NFPA 1192 standards, but these do not automatically qualify the unit as a habitable dwelling under the IRC. Shipping container homes must also meet all IRC requirements and typically require significant modification to comply with building standards.