The 127,000-square-foot Colonnade II office building in north Raleigh, which was sold to a new investor in January 2015 for $27.5 million, serves as the corporate headquarters of Salix Pharmaceuticals . Investors in commercial real estate and apartment properties in the Triangle spent a combined $344 million in new deals in January, according to a review of Wake, Durham and Orange county deed records by Triangle Business Journal .