The rankings for the Top 25 Office Developers are based on the volume of activity globally during 2010. The results include office space completed during the course of the year or under construction as of Dec. 31, 2010.

  1. Hines

    Total Office Space Developed or Under Construction: 11.6 million sq. ft.

    Phone: (713) 621-8000

    Website: www.hines.com

  2. Trammell Crow Co.

    Total Office Space Developed or Under Construction: 4.2 million sq. ft.

    Phone: (214) 863-4101

    Website: www.trammellcrow.com

  3. Carter

    Total Office Space Developed or Under Construction: 4 million sq. ft.

    Phone: (404) 888-3000

    Website: www.carterusa.com

  4. The Alter Group

    Total Office Space Developed or Under Construction: 3.3 million sq. ft.

    Phone: (847) 676-4300

    Website: www.altergroup.com

  5. Hillwood

    Total Office Space Developed or Under Construction: 2.6 million sq. ft.

    Phone: (817) 224-6000

    Website: www.hillwood.com

  6. Boston Properties

    Total Office Space Developed or Under Construction: 2.2 million sq. ft.

    Phone: (617) 236-3300

    Website: www.bostonproperties.com

  7. Brandywine Realty Trust

    Total Office Space Developed or Under Construction: 1.9 million sq. ft.

    Phone: (610) 325-5600

    Website: www.brandywinerealty.com

  8. CenterPoint Properties

    Total Office Space Developed or Under Construction: 1.8 million sq. ft.

    Phone: (630) 586-8000

    Website: www.centerpoint-prop.com

  9. Corporate Office Properties Trust

    Total Office Space Developed or Under Construction: 1.2 million sq. ft.

    Phone: (443) 285-5400

    Website: www.copt.com

  10. USAA Real Estate Co.

    Total Office Space Developed or Under Construction: 969,109 sq. ft.

    Phone: (800) 531-8182

    Website: www.usrealco.com

  11. Brookfield Office Properties

    Total Office Space Developed or Under Construction: 920,000 sq. ft.

    Phone: (212) 417-7000

    Website: www.brookfieldofficeproperties.com

  12. Lowe Enterprises

    Total Office Space Developed or Under Construction: 920,000 sq. ft.

    Phone: (310) 820-6661

    Website: www.loweenterprises.com

  13. Duke Realty Corp.

    Total Office Space Developed or Under Construction: 846,073 sq. ft.

    Phone: (317) 808-6000

    Website: www.dukerealty.com

  14. Forest City Enterprises

    Total Office Space Developed or Under Construction: 601,000 sq. ft.

    Phone: (216) 621-6060

    Website: www.forestcity.net

  15. McShane Development Co.

    Total Office Space Developed or Under Construction: 582,454 sq. ft.

    Phone: (847) 292-4300

    Website: www.mcshanerealestate.com

  16. Transwestern

    Total Office Space Developed or Under Construction: 570,242 sq. ft.

    Phone: (713) 270-7700

    Website: www.transwestern.net

  17. Liberty Property Trust

    Total Office Space Developed or Under Construction: 557,000 sq. ft.

    Phone: (610) 648-1700

    Website: www.libertyproperty.com

  18. Patrinely Group

    Total Office Space Developed or Under Construction: 500,000 sq. ft.

    Phone: (713) 840-2700

    Website: www.patrinelygroup.com

  19. The Rockefeller Group

    Total Office Space Developed or Under Construction: 409,000 sq. ft.

    Phone: (212) 282-2000

    Website: www.rockefellergroup.com

  20. Shorenstein Properties

    Total Office Space Developed or Under Construction: 400,000 sq. ft.

    Phone: (415) 772-7000

    Website: www.shorenstein.com

  21. Kilroy Realty Corp.

    Total Office Space Developed or Under Construction: 300,000 sq. ft.

    Phone: (310) 481-8400

    Website: www.kilroyrealty.com

  22. Franklin Street Properties Corp.

    Total Office Space Developed or Under Construction: 295,891 sq. ft.

    Phone: (800) 950-6288

    Website: www.franklinstreetproperties.com

  23. TIAA-CREF

    Total Office Space Developed or Under Construction: 275,413

    Phone: (800) 842-2733

    Website: ww.tiaa-cref.org

  24. Mack-Cali Realty Corp.

    Total Office Space Developed or Under Construction: 205,000 sq. ft.

    Phone: (732) 590-1000

    Website: www.mack-cali.com

  25. Lauth Group

    Total Office Space Developed or Under Construction: 199,355 sq. ft.

    Phone: (317) 848-6500

    Website: www.lauth.net