ViaWest has sold out its first data center in Las Vegas and has signed a lease for a 110,000 sq ft facility it will turn into another colocation site. The company is planning to bring online 70,000 sq ft of raised floor, powered by more than 10MW of power.

Roy Dimoff, the company’s chairman and CEO, said, since the first data center in Las Vegas was at capacity, the expansion would enable it to continue to meet growing demand for premium data center space in this market.

“We are excited to grow our investment in this market and further establish ourselves in the local community,” Dimoff said.

ViaWest is placing a lot of focus on making the facility as environmentally friendly as possible. The company is planning to apply for both LEED and Energy Star certificates.

LEED stands for Leadership in Energy and Environmental Design. It is multi-tier rating system by the US Green Building Council for determining how sustainable a building is and how sustainably it was built.

Energy Star is a certificate for energy efficient buildings and product by the US Environmental Protection Agency.

ViaWest has custom-designed an energy efficient cooling system specifically for Las Vegas climate. A cooling system is usually one of the biggest sources of inefficiency in a data center, so optimizing cooling energy use, especially through incorporating free outside-air cooling, leads to big energy-efficiency gains.

Once the second Las Vegas data center is built out, ViaWest’s portfolio will consist of 450,000 sq ft of raised floor across 23 facilities in Nevada, Colorado, Oregon, Texas and Utah.

ViaWest is owned by Oak Hill Capital Partners, a New York private-equity firm that bought it in 2010. The data center company has been expanding, mostly in second-tier US markets, through acquisitions of existing data centers and through building out new ones.