Industrial giant General Electric has selected two buildings and a parking lot owned by Procter & Gamble at 5 and 6 Necco Way for its new world headquarters in Boston’s Seaport District by 2018.

The existing buildings which will be renovated and the project will include new construction on the 2.5-acre site overlooking the Fort Point Channel, GE said. The new headquarters will house 200 corporate staff and 600 tech developers, designers and product managers in GE’s digital, current, robotics and life sciences divisions.

GE recently leased 40,000 square feet on four floors at 31-41 Farnsworth St. in Fort Point for a temporary headquarters that it will occupy this summer as it relocates from its longtime headquarters in a Fairfield, Connecticut office park.

GE’s decision puts the company’s new headquarters on the edge of a thriving office submarket that has attracted dozens of growing tech companies including LogMeIn and Zipcar.

GE CEO Jeffrey Immelt was scheduled to address the Boston College Chief Executives’ Club luncheon today at the Boston Harbor Hotel to discuss the company’s plans to reinvent itself as a leader in the “Internet of Things” space with access to Greater Boston’s digital economy cluster and the region’s higher education institutions.