Malay Peninsula contains Malaysia (West Malaysia, Malaya) and southern Thailand. Main ethnic groups in Peninsula are Malay living in the south part and Thai in the northern part, as well as emigrated Han from China. This study focuses on Malay house type and Southern Thai house type. Hybrid house forms of Malay house and Han house were inadvertently discovered during research years and also regarded as research objects owing to their relevance to Malay house type. House type generates consistent but diversified forms. House type is embedded with typological rule system, which can develop great amounts of variations. This study, with a coding system, analyzed the variations of Malay houses and southern Thai houses in Malay Peninsula and generalized a typological rule system. The typical appearances of houses in Malay Peninsula are house grouping for the use of one single family. The rule system comprises of ‘spatial rule’, ‘house grouping rule’ and ‘construction rule’. Especially, Malay house starts house grouping from its main house. ‘Main house formation rule’ was added into the rule system. Every rule dominates several sub-rules. Rule system can describe all of the house cases in southern Thailand and seven regions of Malaysia, and can clarify that three basic forms exist in the Peninsula, thereby establishes the house system in Malay Peninsula.