What is the process for obtaining a 1-year extension of a Non-O visa for Thai wives at Chang Wattana?

A user shared their experience of obtaining a 1-year extension for a Non-O visa at the Chang Wattana Immigration Office. They reported a smooth process that took less than two hours, involving document checks and a 30-day consideration stamp. Other community members discussed document requirements, including proof of residence, specific contracts, and maps, emphasizing the importance of preparation and the possibility of the immigration office making copies of necessary documents.