The United Negro College Fund made its move to Washington official Monday with the purchase of its new headquarters space in a $150 million development above the Shaw Metro station that many hope will rejuvenate the historic black neighborhood. Called Progression Place, the building is a massive office, residential and retail project that city officials say will bring 500 construction jobs and 300 permanent jobs to the District. UNCF paid roughly $24 million for 50,000 square feet within the building, half the available office space. At the project’s ceremonial groundbreaking Monday — construction began in December — Mayor Vincent Gray said UNCF’s move from Fairfax would be a shot in the arm for the city’s economy. The city has $20 million invested in the project, which is scheduled to finish in late 2012 and expected to generate at least $25 million in new taxes over the next two decades.