South Development Office (SDO) is responsible for the planning, programming and implementation of the engineering projects related to major developments on Hong Kong Island and in Kowloon. It also prepares works progress reports for the District Councils of Central & Western, Eastern, Southern, Wan Chai, Sham Shui Po and Yau Tsim Mong.

Current major projects undertaken by SDO include Wan Chai Development Phase II, West Kowloon Cultural District Project and roadworks on West Kowloon Reclamation.