LOS ANGELES-Two more local development teams have stepped back into the future, with one completing the conversion of a landmark hotel into a modern apartment complex and another builder about to finish the transformation of Downtown’s former Union Oil Building into hip office and retail space.

The old Union Oil headquarters complex was built in 1928 and stands at 617 W. Seventh Street. Several years after the oil company moved out, New York-based developer Hiro Real Estate purchased the 12-story building and began an ambitious conversion project aimed at attracting more technology and creative companies to the Central Business District.

The 218,000-sf building still has its classic brass elevator cabs and retro checkered floors. But Hiro has exposed the structure’s interior brick walls, added modern fiber optic and other systems, and created a “club floor” that includes a pool table, basketball area and other amenities. A formal re-opening ceremony will be held next Thursday evening.

Separately, a public-private partnership this week finished the conversion of the 81-year-old Hoover Hotel in Uptown Whittier into a 50-unit apartment complex for low-income seniors. The development team included Irvine-based Vista Communities Inc., Santa Monica-based Killefer Flammang Purtill Architects, Southland-based general contractor Dreyfuss Construction and the Whittier Redevelopment and Housing Department.