Twining Properties and Principal Real Estate Investors (a subsidiary of Principal Global) invested in 350 Third Street in Kendall Square, Cambridge. The 375,000 square foot 24-story building, completed in 2006, is called Watermark Kendall West and boasts 321 luxury apartments and 25,000 square feet of retail space. With controlled access, a courtyard complete with grills, covered parking, rooftop deck, fitness center and even a Zen-garden. Watermark Kendall West has brought more luxury living to Cambridge’s fastest growing neighborhood.