To keep up with incessantly growing demand for its services, Google is ramping up build-out of two data centers in North Carolina and in South Carolina simultaneously.

The company announced on Thursday that Phase II build-out of its facilities in Lenoir, North Carolina, and in Berkeley County, South Carolina will start in 2011. Google representatives wrote on respective websites for the two facilities that Phase II expansion was part of the original data center construction plan.

Both phases at each of the two sites are in separate building shells. Each site's construction timeline has mirrored that of the other.

The first data center and shell of the second data center were completed at each of the sites in 2008. Google plans to begin limited testing of second phases in Lenoir and in Berkeley County in the first half of 2011.

The company plans to bring the two new data centers online by the end of 2011.

Google said it initially decided to locate a data center in Lenoir because the town had all the necessary elements.

"Lenoir has the right combination of energy infrastructure, developable land and available workforce for the data center," according to the data center's website. "Additionally, the team from the local community that welcomed us has worked exceptionally hard throughout the selection process."

The company gave the same reasons for locating in Berkeley County.