[Grams A]

So why don’t they just use their previous plant?

[SeekAndFind]

Tesla manufactures the Model S in Fremont, California, in an assembly plant formerly operated by NUMMI, a defunct joint venture of Toyota and General Motors, now called Tesla Factory. Tesla purchased a stake in the site in May 2010 for US$42 million, and opened the facility in October 2010.

The fact that they are considering sites in OTHER STATES just shows you how prohibitive manufacturing in California has become.

[Wyatt's Torch]

http://www.teslamotors.com/sites/default/files/blog_attachments/gigafactory.pdf

[PlasticMan]

So why don’t they just use their previous plant?

They outgrew it with the rise in demand for their product.