Enel Green Power North America Inc. has opened its new headquarters at Andover Landing at Brickstone.

The just-renovated 66,000-square-foot facility doubles the company’s office footprint and provides for future growth. Part of the renewable energies division of Enel Group, EGP-NA operates approximately 100 renewable energy plants in North America powered by hydropower, wind, geothermal and solar energy.

EGP-NA entered the U.S. market in 2000 when Enel Group acquired Boott Hydro in Lowell and Lawrence Hydro in Lawrence. The company now employs 400 people in the U.S., including 238 in Andover, and is expected to increase its local workforce.

“Our company’s success is a testament to the state’s skilled workforce, attractive business climate and strong renewable energy economy, all factors that have allowed us to grow here for more than 15 years,” Rafael Gonzalez, head of EGP-NA, said in a statement.

The new offices contain sustainable features including recycled carpet materials, electric vehicle charging stations, reclaimed wood flooring and low-flow water fixtures.

EGP-NA was previously located at One Technology Drive in Andover. Andover Landing at Brickstone is part of a 53-acre, 1-million-square-foot property acquired by KS Partners and Oaktree Capital in 2014 for $59.5 million.