For the year ended Dec. 31, 2008, the company signed leases totaling more than 1.1 million square feet, including approximately 594,000 square feet of turnkey datacenter space leased at an average annual GAAP rental rate of $153 per square foot. The total also included more than 299,000 square feet of space leased at an average annual GAAP rental rate of $56 per square foot, and approximately 242,000 square feet of non-technical space leased at an average annual GAAP rental rate of $18 per square foot.

For the fourth quarter, the company signed leases totaling approximately 276,000 square feet, including approximately 120,000 square feet of turnkey datacenter space at an average annual rate of $180 per square foot, approximately 8,000 square feet at an average of $54 per square foot and approximately 149,000 square feet of non-technical space at an average annual of $17 per square foot.

Digital Realty owns 12.9 million sf in 74 properties in 24 markets in Europe and North America. Michael F. Foust, CEO of Digital Realty, attributed the leasing figures to "strong demand for high quality datacenter space" combined with widespread adoption of the company's turnkey datacenter space. He noted that the leases average approximately 8.5 years.