Complex sentence: The School of Excellence began leasing the Solace building in August 2010, and have have made $400,000 worth of renovations from electric wiring, plumbing, and exterior masonry work.
Split into simpler sentences: The School of Excellence began leasing the Solace building in August 2010. They have made $400,000 worth of renovations from electric wiring, plumbing, and exterior masonry work.