Social network and advertising giant Facebook plans to add another two buildings to its data center campus in Crook County, Oregon, by mid-2020.

The $750 million investment will bring the company's total footprint at the site to more than 3.2 million square feet (300,000 sq m), making it Facebook's largest data center location.

The campus is currently home to 1.25 million square feet (116,000 sq m) of Facebook facilities spread across three buildings; another two buildings were announced in 2017 and are currently under construction, expected to add 900,000 square feet (83,613 sq m) of data center space and 70,000 square feet (6,503 sq m) of office space.

While Facebook did not provide details on the latest expansion, numbers suggest that it will total roughly one million square feet (93,000 sq m).

Facebook's first, Facebook's biggest

The new facilities will lead to the creation of approximately 100 jobs, in addition to the existing 350.

As with its current data centers, the upcoming facilities are expected to be powered by renewable energy - namely solar power. Two new projects in Crook County will increase the amount of solar power available in Oregon by more than 20 percent. Company-wide, Facebook expects to fully switch to renewable energy by 2020.

"Next month, we will also launch our Community Action Grants program for 2019. This program provides grants to schools and organizations in support of putting the power of technology to use for the community and promoting STEM education," the company said in a blog post.

Prineville is home to Facebook’s first custom built data center, opened in 2011, which was constructed with the promise of $30 million in tax exemptions. The exemptions were further enhanced in 2015.

Facebook has grown substantially since its first facility, and now operates several huge data center campuses, in locations including Forth Worth, Texas; Los Lunas, New Mexico; Altoona, Iowa; Forest City, North Carolina; Luleå, Sweden; and Clonee, Ireland.

It is also building new data centers in New Albany, Ohio; Odense, Denmark; Henrico County, Virginia and Papillion, Nebraska.