Denver Tech executive suites and fully furnished turnkey flexible office space for lease on S. Ulster Street Suite 800 Denver, CO 80237. This DTC business center offers ready to go executive office suites, temporary office space for rent, virtual offices, mailing addresses and office space for lease on flexible terms. Our Denver office business center is located in the heart of the Denver Technology Center directly across the street from the Hyatt Regency hotel. Regency Plaza Center clients enjoy stunning views of the Rocky Mountains and the downtown skyline as well as easy access to local golf courses and highways 25 and 225. Denver International Airport is only a short 20 minute drive away.