An e-commerce company has taken 1.5MW at Vantage's Santa Clara, California, data center campus. The company, whose name was not disclosed, has been the data center provider's customer and has decided to use its services to expand Silicon Valley capacity beyond the 1MW it has been leasing.

The deal may ease recent worries that there was an oversupply of wholesale data center space in the region. The Santa Clara campus was one of the sites on real-estate firm Avison Young's list of the biggest chunks of space available in the US.

Michael Foust, CEO and director of Digital Realty Trust, a major Vantage competitor, said Silicon Valley was “one major market in the US at risk of significant oversupply.” Vantage has 7MW available in the Valley, according to Avison Young's January report on the North American data center market.

In addition to expanding its capacity at Vantage, the e-commerce customer has extended the term of its initial 1MW lease. The provider said it had fit out 7,200 sq ft of data center space to accommodate the expansion.

With the expansion, the campus is built out to provide about 26MW of critical load, Vantage said. Together with its campus in Quincy, Washington, the company's potential data center capacity is about 100MW.

The company's president and CEO Sureel Choksi said the deal validated the quality of its services. “Vantage’s strong operational track record, willingness to custom-configure new capacity and deliver highly energy efficient facilities positioned Vantage uniquely to support this customer’s expansion requirements,” he said in a statement.