Developer of huge Phoenix project near TSMC applies to buy more land Article originally posted on AZ Central on May 11, 2026 Another 1,300 acres in north Phoenix near the Taiwan Semiconductor Manufacturing Co. plant could be primed for new development. The site, which is directly west of TSMC’s first phase and the 2,300-acre development called Halo Vista, is still controlled by the Arizona State Land Department. However, Mack Real Estate Group, one of the master developers of Halo Vista, has submitted an application to buy the land at a future state auction. The site is near 51st Avenue and Loop 303. The submittal was part of Mack’s obligations that came from buying the Halo Vista land, Richard Mack, CEO of Mack Real Estate Group said. The successful buyer of the 2,300 acres that became Halo Vista would be required to apply for the remaining land, he said. That does not mean Mack is obligated to buy the land which will be sold at an auction that has not yet been scheduled. “The economics of being an applicant generally are precarious,” Mack said, referencing work, fees and planning that applicants are required to do for sites they may not win at auction. “We believe that we are probably the best people to plan, best to analyze the highest and best use of that land.” Mack said the land is a “high profile site now” because of the large-scale development that is beginning to take shape in the area following TSMC’s $165 billion investment. As the buyer of the Halo Vista land, Mack was given several requirements from the city and state for milestones to hit in terms of land sales, infrastructure and other obligations, including applying for the additional land auction and leading the rezoning. Mack is required to apply for the rezoning of the site, and documents submitted to the Arizona State Land Department indicate it is likely to seek future master planned development on the large site. Mack said it will be a year or more before the company is ready to do the formal rezoning process for the site. Mack’s adjacent project, Halo Vista, broke ground in March, and includes 2,300 acres that surrounds the TSMC plant on three sides. The development is expected to cost about $7 billion at full buildout. Plans call for several different sub-areas: The town center with residential development, hospitality and dining. That area is planned to have nearly 9,000 apartment units. Lumen Square, planned for retail and hospitality. It will include the auto mall and other commercial development on the northeast corner of the site. The Forge, which will include a technology district and an innovation park for industrial, manufacturing, and research uses. The Sonoran Oasis Research and Technology Park, which will accommodate research and offices for research and workforce development. The first phase of the project will include a Costco, two Marriott hotels, an auto mall and industrial space to accommodate suppliers to TSMC, Mack said at the groundbreaking.