The rankings for the top 25 office developers are based on the volume of activity globally during 2011. The results include office space completed during the course of the year or under construction as of Dec. 31, 2011.

1. Hines
Total Office Space Developed or Under Construction: 12,121,040 sq. ft.
PH: 713.621.8000
www.hines.com

2. Trammell Crow Company
Total Office Space Developed or Under Construction: 4,109,647 sq. ft.
PH: 214.863.4101
www.trammellcrow.com

3. Carter
Total Office Space Developed or Under Construction: 4,000,000 sq. ft.
PH: 404.888.3000
www.carterusa.com

4. The JBG Companies
Total Office Space Developed or Under Construction: 3,108,509 sq. ft.
PH: 240.333.3600
www.jbg.com

5. Lowe Enterprises
Total Office Space Developed or Under Construction: 3,000,000 sq. ft.
PH: 310.820.6661
www.loweenterprises.com

6. Hillwood
Total Office Space Developed or Under Construction: 2,600,000 sq. ft.
PH: 817.224.6000
www.hillwood.com

7. Boston Properties
Total Office Space Developed or Under Construction: 2,145,860 sq. ft.
PH: 617.236.3300
www.bostonproperties.com

8. Duke Realty
Total Office Space Developed or Under Construction: 1,500,000 sq. ft.
PH: 317.808.6000
www.dukerealty.com

9. SL Green Realty Corp.
Total Office Space Developed or Under Construction: 1,395,838 sq. ft.
PH: 212.594.2700
www.slgreen.com

10. USAA Real Estate Co.
Total Office Space Developed or Under Construction: 1,000,000 sq. ft.
PH: 800.531.8182
www.usrealco.com

11. Kilroy Realty Corp.
Total Office Space Developed or Under Construction: 918,000 sq. ft.
PH: 310.481.8400
www.kilroyrealty.com

12. Corporate Office Properties Trust
Total Office Space Developed or Under Construction: 789,226 sq. ft.
PH: 443.285.5400
www.copt.com

13. Transwestern
Total Office Space Developed or Under Construction: 772,000 sq. ft.
PH: 713.270.7700
www.transwestern.net

14. McShane Development
Total Office Space Developed or Under Construction: 550,000 sq. ft.
PH: 847.292.4300
www.mcshanerealestate.com

15. Patrinely Group
Total Office Space Developed or Under Construction: 500,000 sq. ft.
PH: 713.740.2700
www.patrinelygroup.com

16. The Alter Group
Total Office Space Developed or Under Construction: 435,500 sq. ft.
PH: 847.676.4300
www.altergroup.com

17. Liberty Property Trust
Total Office Space Developed or Under Construction: 414,824 sq. ft.
PH: 610.648.1700
www.libertyproperty.com

18. Mack-Cali Realty Corp.
Total Office Space Developed or Under Construction: 407,057 sq. ft.
PH: 732.590.1000
www.mack-cali.com

19. Hemingway Development
Total Office Space Developed or Under Construction: 335,000 sq. ft.
PH: 330.528.3500
www.geis.us

20. The Rockefeller Group
Total Office Space Developed or Under Construction: 325,000 sq. ft.
PH: 212.282.2000
www.rockefellergroup.com

21. Franklin Street Properties
Total Office Space Developed or Under Construction: 295,891 sq. ft.
PH: 800.950.6288
www.franklinstreetproperties.com

22. TIAA-CREF
Total Office Space Developed or Under Construction: 275,000 sq. ft.
PH: 800.842.2733
www.tiaa-cref.org

23. The Pizzuti Companies
Total Office Space Developed or Under Construction: 245,275 sq. ft.
PH: 614.280.4000
www.pizzuti.com

24. Lauth Group
Total Office Space Developed or Under Construction: 200,000 sq. ft.
PH: 317.848.6500
www.lauth.net

25. Hanover Commercial
Total Office Space Developed or Under Construction: 100,000 sq. ft.
PH: 303.399.9000
www.spectracolorado.com