Charleston County voters have a final list of school construction projects to consider when deciding whether to extend a 1 percent sales tax in a referendum this November.

The Charleston County School Board on Monday approved a final list of 30 building projects totaling $503 million.

Key projects include: a new elementary school and a second high school in Mount Pleasant, renovations of Burns and Dunston elementaries in North Charleston, centers for advanced studies at both North Charleston High and West Ashley High, and a new building for C.E. Williams Middle School.

Michael Bobby, chief financial officer for the Charleston County School District, said the projects are not prioritized in any order. The School Board will prioritize the list at a later date, he said.

The 1 percent sales tax is set to expire in 2016. If voters approve the tax again it will be extended through 2022.