As demand for new construction continues to grow in the Charleston market, vacancy rates continue to rise according to Colliers International Research & Forecast Q4 2018 Report.  The expectation is that the vacancy rate will continue this trend into the first few quarters of 2019.  This vacancy rate is on the rise primarily due to 11 new office buildings delivered in 2018, totaling 433,024 square feet of new construction. The Charleston office market has a total of 13,185,388 square feet…