Jamestown Properties, a German commercial real estate investment company, will go "green".  They plan to make small and large changes to make their entire US based $4B building portfolio environmentally friendly.

Simple changes include just using low-flow water fixtures but they also plant to revamp their heating, ventilation and air-conditioning systems.

But what's the cost to do all this?? In the millions!!!

But they'll see the Return on Investment for all this "Green" spending from lowered "energy" bills and of course by passing on some of the costs to the tenants in the form of increased rent. They'll also find that their buildings will sell at a higher price too once they become "green", so all in all, a win-win situation for the environment, Jamestown Properties, and tenants who also benefit from more energy efficient living spaces.

Jamestown is an acquisition and management firm located in Cologne, Germany and in the US, in Atlanta. They have invested $12 billion in commercial properties in the United States through private equity funds from German investors.
 
And to help them with all this "green" work, Jamestown acquired a consulting firm in Atlanta which focuses on environmental sustainability. Jamestown is pretty gung-ho in it's "green" mission because they've implemented various programs such as carpooling and bike sharing to help reduce Carbon emissions. They use energy efficient lighting to save lots of energy and they recycle paper and reuse it.

Sounds like Jamestown Properties is leading the pack in creating environmentally friendly spaces.