Sony Santa Monica has revealed plans to move to a larger location in nearby Playa Vista, to expand their studios.
As they elaborate in this blog post, the Santa Monica facilities are actually built on top of some 1900s-era train station. After 47 games and 14 years, they simply need more room to grow. The new Playa Vista facilities will have new recording and mocap facilities.
On the side, if you live near the area, they are legitimately looking for new employees. You can check out their job openings here.