For example look at tesla's 5.5 million sq ft facility..
Much of the 370-acre (16,000,000 sq ft; 1,500,000 m2) site is unused, with most activity concentrated in the 5,500,000-square-foot (510,000 m2) main building that does the final assembly of vehicles.[12]
Various parts of the NUMMI plant were planned to be modified to support Tesla vehicle production. For example, the passenger vehicle paint equipment was to be extensively modified through late 2011.[12][dated info]
Over $17 million of manufacturing equipment and spare parts were acquired from NUMMI and Toyota in 2011, at significant discounts compared to new equipment.[17]
The floors, walls and ceiling are painted white with skylights and high-efficiency lighting to create an environment similar to a laboratory.[18]
Tesla is building a casting foundry in Lathrop supporting the Fremont production.[19][20][2
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