Foreign land ownership (therefore land and house ownership) is prohibited in Thailand.
Under land laws of Thailand foreign land ownership is limited to:
(1) foreign ownership under a treaty - section 86 land code act (this is not a real option because Thailand does not have any treaty with any country allowing foreign nationals to own land in Thailand), and;
(2) foreigners can own a limited area of land for residential purposes under section 96 bis of the land code act (this is also not a real or feasible option for foreigners, it requires among others approval of the Minister of Interior and is under strict conditions and can only be granted in specified areas, and in addition it requires a 40 million baht investment in specified assets or government bonds beneficial to the Thai economy, as approved by Thailand's Board of Investment).
Foreigners are under the conditions of section 19 of the condominium act allowed to own in their own name an apartment unit in a condominium building registered and licensed with the Thailand land department as 'condominium'.