Trident Health has announced plans to expand Summerville Medical Center.

The $8 million, 40,000- square-foot medical office building will house several specialty practices attached to the hospital.

"This venture gives our patients closer choices and additional convenience when it comes to their health care options," Summerville Medical Center CEO Lisa Valentine said Friday in a prepared statement.

Roper St. Francis Healthcare is also expanding its footprint in that area.

The nonprofit hospital system recently unveiled plans for a new 60,000-square-foot building in Carnes Crossroads development. That project was first announced in May. It will include diagnostic imaging, urgent care and oncology services.

Both buildings are expected to be completed in 2015.

Reach Lauren Sausser at 937-5598.