Indonesia as member of the Association of Southeast Asian Nations (ASEAN) have entered a new era that envisions a single market and production base that integrates into global economy by liberating movement of goods, services and investments called the ASEAN Economic Community. Thus increase the inflow of foreign workers and professionals to invest in Indonesia. The foreigners who do benefits, do business, or investing in Indonesia requires house to stay while they are staying in Indonesia. To support the increasing investment, Indonesian Government has issued a Government Ordinance 103 of 2015 relating to Foreign citizens property ownership that refers to the principle of horizontal separation that lies in the Agrarian Law Act No.5 of 1960. Government regulations issued can develop the country's infrastructure by expanding the market for new developers who can create jobs and boost the national economy, as well as providing legal certainty for foreigners domiciled in Indonesia who wish to work or invest in Indonesia. Many of those foreign workers enter into a transnational marriage with Indonesian citizen. Transnational marriages may lead problems concerning the assets or ownership of property, whether the property owned before marriage or acquired during marriage. Normative legal research will be use to explain the issue stated by implementing the statute approach and conceptual approach in qualitative analytical behavior. Eventually, foreigners who perform transnational marriages are allowed to have the right to use property by making a separation agreement on treasure first.