[CENTRAL BANCORP LETTERHEAD]





Contact: William P. Morrissey
         Senior Vice President                          For Release: Immediately
         (617) 628-4000

               CENTRAL BANCORP REPORTS SECOND QUARTER EARNINGS AND
                      FINAL ANNUAL MEETING ELECTION RESULTS

     SOMERVILLE,   MASSACHUSETTS,  October  25,  2002--  Central  Bancorp,  Inc.
(NASDAQ:  CEBK)  today  reported  that  its net  income  increased  over  18% to
$668,000,  or $0.42 per diluted share,  for the three months ended September 30,
2002, from $564,000,  or $0.34 per diluted share, for the corresponding  quarter
in the prior fiscal year.  Exclusive of the after-tax impact of gains and losses
on the sales and write-downs of investment  securities,  core earnings increased
67% in the current  fiscal  quarter  compared  to the same  quarter in the prior
year. This significant  improvement  occurred despite  additional costs incurred
during  the  current  quarter  in  connection  with the  contested  election  of
directors at this year's annual meeting which,  after taxes,  reduced net income
by  approximately  $190,000.  The  elimination of goodwill  amortization  in the
current  year,  as  required  by  a  change  in  generally  accepted  accounting
principles, contributed $72,000 to the improved quarterly results.

     The increase in net income in the second  quarter,  as compared to the same
quarter in the prior  year,  occurred  despite a decrease  of  $342,000,  before
taxes,  in  net  gains  and  losses  on  sales  and  write-downs  of  investment
securities.  During the quarter ended September 30, 2002, the Company recognized
write-downs  of $220,000 in certain  equity  securities  due to an impairment in
value deemed to be other than temporary.

     For the six months ended  September 30, 2002,  net income  increased 55% to
$1,695,000,  or $1.05 per diluted share,  from $1,094,000,  or $0.65 per diluted
share in the year earlier period. Exclusive of the after-tax impact of gains and
losses on the sales and  write-downs  of  investment  securities,  core earnings
doubled  during the first six months of the current  fiscal year compared to the
same period in the prior year.


                                   (continued)

Central Bancorp, Inc.
Page 2 of 3


     John D. Doherty, President & Chief Executive Officer, stated, "I am pleased
that we were able to continue to improve  significantly our core earnings in the
second  quarter  as  compared  to  last  year.  Core  deposits  increased  at an
annualized  rate of over 15% during the current  quarter and helped to partially
offset the  pressures on the net  interest  margin  caused by the  unprecedented
level of mortgage loan prepayments and the related decrease in loan yields."

     The  significant  increase in core earnings in the quarter ended  September
30, 2002, as compared to the same period in the prior year,  primarily  resulted
from an  increase of $756,000 in net  interest  and  dividend  income due to the
Bank's  lower cost of funds.  The Company  experienced  a  narrowing  in its net
interest  margin to 3.56% in the most recently  completed  quarter from 3.76% in
the first quarter of the current fiscal year. The narrowing of the Company's net
interest  margin is  attributable  to the  decline in yield on  interest-earning
assets resulting from a record level of mortgage refinancings in the current low
interest rate environment.

     Loan  quality  continued  to be  outstanding  with  only one loan  having a
balance of $599,000  delinquent  in excess of 90 days at September  30, 2002. In
addition,  loan  delinquencies  continued  to be minimal and the Company held no
foreclosed assets at end of the current quarter.

     The Company  also  announced  today that final  results of the  election of
three directors at the 2002 Annual Meeting of  stockholders  confirmed that Paul
E. Bulman,  Garrett Goodbody and Richard Fates received a plurality of the votes
cast.

     Central Bancorp, Inc., is the holding company for Central Bank, whose legal
name is Central Co-operative Bank, a  Massachusetts-chartered  co-operative bank
operating eight full-service banking offices in suburban Boston.

                           (See accompanying tables.)

- --------------------------------------------------------------------------------
This earnings report may contain certain forward-looking  statements,  which are
based on management's current expectations  regarding economic,  legislative and
regulatory  issues that may impact the  Company's  earnings  in future  periods.
Factors  that  could  cause  future  results  to vary  materially  from  current
management  expectations  include,  but are not  limited  to,  general  economic
conditions,  changes in interest  rates,  deposit flows,  real estate values and
competition;  changes in accounting principles,  policies or guidelines; changes
in legislation or regulation;  and other  economic,  competitive,  governmental,
regulatory  and  technological   factors  affecting  the  Company's  operations,
pricing, products and services.
- --------------------------------------------------------------------------------


Central Bancorp, Inc.
Page 3 of 3

                              CENTRAL BANCORP, INC.
                           CONSOLIDATED OPERATING DATA
                      (IN THOUSANDS, EXCEPT PER SHARE DATA)


                                                  Quarter Ended    Six Months Ended
                                                  September 30,     September 30,
                                                 ---------------   ---------------
                                                   2002     2001    2002      2001
                                                 ---------------   ---------------
                                                    (Unaudited)      (Unaudited)
                                                                
Net interest and dividend income                 $4,116   $3,360   $8,396   $6,596
Net gain (loss) on sales and write-downs
  of investment securities                         (221)     121     (210)     324
Other non-interest income                           279      216      491      422
Non-interest expenses                             3,132    2,806    6,023    5,618
                                                 ------   ------   ------   ------
  Income before taxes                             1,042      891    2,654    1,724
Provision for income taxes                          374      327      959      630
                                                 ------   ------   ------   ------
  Net income                                     $  668   $  564   $1,695   $1,094
                                                 ======   ======   ======   ======
Earnings per share:
  Basic                                          $ 0.42   $ 0.34   $ 1.06   $ 0.66
                                                 ======   ======   ======   ======
  Diluted                                        $ 0.42   $ 0.34   $ 1.05   $ 0.65
                                                 ======   ======   ======   ======

Weighted average number of shares outstanding:
  Basic                                           1,585    1,666    1,592    1,664
                                                 ======   ======   ======   ======
  Diluted                                         1,600    1,683    1,609    1,678
                                                 ======   ======   ======   ======
RECONCILIATION OF GAAP
  EARNINGS TO CORE EARNINGS:
Net Income per GAAP                              $  668   $  564   $1,695   $1,094
Net (gain) loss on sales and write-downs of
  investment securities, net of taxes               146      (77)     139     (207)
                                                 ======   ======   ======   ======
Core Earnings                                    $  814   $  487   $1,834   $  887
                                                 ======   ======   ======   ======


                         CONSOLIDATED BALANCE SHEET DATA
                                 (IN THOUSANDS)


                                                    SEPTEMBER 30,       March 31,
                                                        2002              2002
                                                    ----------------------------
                                                    (UNAUDITED)
                                                                  
Total assets                                          $470,543          $468,219
Total loans                                            369,843           371,707
Allowance for loan losses                                3,294             3,292
Deposits                                               276,447           261,907
Borrowings                                             151,700           164,000
Stockholders' equity                                    39,419            38,954