A new four-story office building will headline a major mixed-use development in Plano, developers announced Oct. 2 as crews began work on the Mustang Square project. Thakkar Developers and Heady Investments said at a construction groundbreaking ceremony that the development would include a 90,000-square-foot office building named HQ Center. About a quarter of the office space is already leased, according to a news release. "The building will be designed to meet the needs of rapidly growing companies, especially technology firms along the SH 121 corridor,” Heady Investments CEO Randy Heady said in the release. McKinney-based Thakkar Developers also said an entertainment venue that includes an upscale movie theater and dining options is 50% preleased. The plans for the property, located southwest of where SH 121 meets Rasor Boulevard, allow for retail stores, restaurants, entertainment facilities and residential areas as well as potentially more office space that has yet to be announced. The Mustang Square development had undergone a winding path to approval. Some residents spoke out against an early version of the plan in 2017 that included a mix of apartments, single-family homes and senior living. Plano City Council denied that request before approving an amended proposal in 2018—this time, with no apartments. But developers continued to refine the plan, asking the city earlier this year to allow them to replace some of the townhouses in the plan with single-family detached buildings with garages. The change, an effort to further bolster foot traffic for the development's commercial district, was approved in September.