Going green costs extra money. But companies increasingly see the advantage of being as energy efficient as possible.

Moseley Architects took an old, contaminated structure and renovated it into its chic industrial headquarters, building such features as a green roof, bamboo ceilings, cork flooring and work station dividers made from sunflower seeds.

President Bill Mills said there is no doubt it cost more. But the company was into the spirit of building an energy efficient building.

Besides, the building is a living laboratory, a showplace for clients interested in going green and for architects inspired to do green design.

It may take years to recoup the cost. Is it worth it?