Tristar Realty Group, a privately-held real estate firm based out of Los Angeles, is nearing completion on a four-story medical office building in Tarzana. The $50-million project, known as the Ventana Medical Plaza, is located on a 2.37-acre site near the northwest corner of Ventura Boulevard and Lindley Avenue. The 112,000-square-foot Class A facility is billed as the largest and most integrated cancer treatment center in the San Fernando Valley, with more than half of its floor area dedicated to radiology, oncology and surgical centers. Tristar has already leased space to a number of healthcare providers, including Radnet Imaging. As the first medical facility built in Tarzana in over 20 years, the Ventana is seen as a potentially transformative project for the stretch of Ventura Boulevard between White Oak Avenue and Reseda Boulevard. Besides medical offices, the development also includes a ground-floor restaurant, a pharmacy, and an 824-stall garage with valet parking and a car wash. Designed by architect Edward Osuch of NEO & Associates, the Ventana features a contemporary highlighted by a 60-foot tall curved glass entrance. The Ventura Boulevard facade includes series of “frames,” or “windows,” which inspired the project’s name. The building’s western elevation features a large mural by the artist Sage Vaughn.