A Houston-based developer has broken ground on a massive new warehouse at a solar manufacturing campus in Tomball, adding yet another building to a site that is quickly becoming one of the biggest industrial projects in northwest Harris County. The 704,080-square-foot structure, known as Building 3, is being built to suit for a solar manufacturer’s expanding distribution operations.
Clay Development & Construction, described as a Houston-based, vertically integrated industrial developer, is behind the project, according to CoStar. The warehouse sits within the Northwest 99 Business Park in Tomball, Texas, and will support growing distribution needs for solar manufacturer SEG Solar. Per Realty News Report, Building 3 is the latest addition to a campus Clay Development broke ground on in 2024, when it began developing the 172-acre business park in northwest Harris County.
A Growing Footprint for SEG Solar
The warehouse is just one piece of a larger buildout at Northwest 99. SEG Solar has acquired two manufacturing buildings totaling roughly 1.1 million square feet within the park, according to REBusinessOnline. One of those, Building 2, totals 450,320 square feet and is under construction for a planned conversion into an additional solar-module manufacturing facility, the outlet reports.
That follows SEG Solar’s earlier purchase of Northwest 99’s 425,360-square-foot Building 1 within the park in 2025, per the same REBusinessOnline account. Together, the two manufacturing facilities at Northwest 99 are expected to create more than 1,500 local jobs, Realty News Report notes, with SEG Solar projecting its total U.S. module capacity will reach 10.6 GW in 2027.
Solar Investment Keeps Landing in Tomball
SEG Solar’s ambitions extend beyond the Northwest 99 site. The company has separately secured land for a planned $950 million, 4-GW heterojunction solar cell plant at its Tomball Industrial Campus, according to pv magazine USA. Clay Development’s president has pointed to at least seven notable solar-energy real estate deals in the Houston area over the preceding two years, a sign of how fast the sector has been moving into the region, per Realty News Report…