Hotel developer Optimal Hospitality Inc. is building a Tru by Hilton Hotel in Sonoma County California. The Tru hotel would be built off-site in modular units. Rooms would be shipped in fully built, with the exception of windows, and stacked atop each other by a large crane. The new hotel is to be located on the south side of Airport Boulevard at Aviation Boulevard near Charles M Schulzz Airport. Hotel construction is booming across California as well as in the North Bay. In Sonoma, Marin, Napa and Solano Counties, 83 hotels are in various planning stages. Preet Sekhon is director of hotel operations for Optimal Hospitality Inc.