Over the last 20 years, the Eastern Seaboard area of Thailand has emerged as the industrial center for Thailand with the National Petrochemical complex at Map Ta Phut, Rayong Province, the container port at Laem Chabang, Chonburi Province, and massive investments in power, water supply network, refineries, highways, transportation, communications, human resource and supporting infrastructure. Thailand has a large integrated petrochemical industry, hosts international automotive companies exporting to 130 global markets, and is consistently rated as attractive for Foreign Direct Investment from broad industries with high value applications. Hemaraj has played a key role in this development.

Industrial Estates at Hemaraj are primarily in the Eastern Seaboard of Thailand with a recent broadening of locations. Four industrial estates developed and managed by Hemaraj are Hemaraj Chonburi Industrial Estate, Hemaraj Eastern Industrial Estate at Map Ta Phut Rayong, Eastern Seaboard Industrial Estate (Rayong) known as the Detroit of the East and adjacent under development Hemaraj Eastern Seaboard Industrial Estate These four Industrial Estates represent 25,000 rai or 10,000 acres under development, industrial clusters for petrochemical automotive and other industries, with 382 customers including 126 automotive customers, direct employment for 65,000 people and a customer investment estimated at USD 14 billion.

From April 2005, Hemaraj formed an industrial property joint venture with Cementhai Property, a subsidiary of The Siam Cement Public Company Limited to acquire shares in S I L Industrial Land Co. Ltd., in order to manage and to continue development of the two industrial zones. S I L Industrial Land, in Saraburi Province thus broadening our location and Rayong Industrial Land, in the Eastern Seaboard of Thailand add 7,000 rai or 2,800 acres under development, 70 industrial customers including from The Siam Cement group, as well as customer investment estimated at over USD 1 billion.

Hemaraj's industrial estates are jointly managed with the Industrial Estate Authority of Thailand (IEAT) and receive promotion incentives Zone III and Zone II from Board of Investment (BOI).