Dutch Energy Company Eneco’s New Rotterdam Headquarters is a Gleaming, Sustainable Office Building

This spring, the Dutch energy company <a href="http://www.eneco.com/Pages/Default.aspx">Eneco</a> moved its roughly 2,100 employees into a new energy-efficient office building in Rotterdam. The 14-story building features a three-story living green wall on the exterior, solar panels on both the south-facing wall and the roof, and highly efficient heating and cooling systems. But it's the interior that steals the show. Designed by <a href="http://www.hofmandujardin.nl/" target="_blank">Hofman Dujardin Architects</a> and <a href="http://www.fokkema-partners.nl/" target="_blank">Fokkema&amp;Partners</a>, the open and flexible interior spaces are flooded with natural light, creating a healthy and enjoyable work environment.

The interior features large, open workspaces.

The interior features several living green walls, which help to improve the air quality of the building.

Three large staircases connect the entryway to the first floor, giving employees the option not to take the elevator.

The first thing workers encounter when they arrive at the new 270,000-square-foot office building is the soaring atrium, which fills the core of the building with natural light.

The first floor features several informal meeting areas and conference rooms.

The bright white space reflects the light from above, further diminishing the need for artificial light.

To save space and increase efficiency, there are only 1,500 workstations for the company's 2,100 employees, taking into account sick days and vacation.

Hofman Dujardin Architects selected high-quality, durable materials when choosing furniture for the new building.

Colorful, informal meeting areas highlight the flexibility of the space and promote collaboration.

Working desks are conceived of as flexible spaces that can be used by different people on different days.

The dramatic first-floor restaurant features a dark ceiling and a dark terrazzo floor.

All of the fabric on the chairs and sofas carries an eco-label.

The use of stairways encourages workers to move their legs and avoid unnecessary (energy-wasting) trips on the elevator.