1 EXHIBIT 11.1 ESSEX PROPERTY TRUST, INC. STATEMENTS OF COMPUTATION OF EARNINGS PER SHARE (Dollars in thousands except per share amounts) Three months ended September 30, Nine months ended September 30, -------------------------------- -------------------------------- 1998 1997 1998 1997 ------------ ------------ ------------ ------------ BASIC: Net income $ 6,678 $ 10,967 $ 22,151 $ 22,089 Less: Dividends on 8.75% Convertible Preferred Stock, Series 1996A (875) (875) (2,625) (1,805) ------------ ------------ ------------ ------------ Net income applicable to common stockholders $ 5,803 $ 10,092 $ 19,526 $ 20,284 ============ ============ ============ ============ Weighted average number of shares outstanding during the period 16,635,228 13,915,790 16,628,721 13,024,696 ============ ============ ============ ============ Net income per share $ 0.35 $ 0.73 $ 1.17 $ 1.56 ============ ============ ============ ============ DILUTED: Adjusted shares - basic, from above 16,635,228 13,915,790 16,628,721 13,024,696 Additional weighted average shares of dilutive stock options using the average stock price under the treasury stock method 186,193 217,565 186,159 205,689 Additional weighted average shares of common stock issuable upon conversion of 8.75% Convertible Preferred Stock, Series 1996A -- 1,828,572 -- 1,255,887 ------------ ------------ ------------ ------------ Weighted average number of shares outstanding during the period 16,821,421 15,961,927 16,814,880 14,486,272 ============ ============ ============ ============ Net income per share $ 0.34 $ 0.69 $ 1.16 $ 1.52 ============ ============ ============ ============ (1) In accordance with Statement of Accounting Standards Board No. 128, the conversion of all of the outstanding operating partnership interests in the Operating Partnership into shares of Essex's Common Stock is not included as the effect would be anti-dilutive. (2) In accordance with Statement of Accounting Standards Board No. 128, the additional weighted average shares issuable upon conversion of the 8.75% Convertible Preferred Stock, Series 1996A is not included for the three and nine months ended September 30, 1998 as the effect would be anti-dilutive. (3) In accordance with Statement of Accounting Standards Board No. 128, preferred dividends were included in the numerator of net income per share for the three and nine months ended September 30, 1997 as the additional weighted average shares issuable upon conversion of the 8.75% Convertible Preferred Stock was dilutive.