EXHIBIT 23


            Consent of Independent Registered Public Accounting Firm




The Shareholders and Board of Directors
SJW Corp.:


We consent to the  incorporation  by  reference in the  registration  statements
(Nos.  333-105010  and  333-127383) on Form S-8 of SJW Corp. of our report dated
March 3, 2006, with respect to the consolidated  balance sheets of SJW Corp. and
subsidiaries  as of  December  31, 2005 and 2004,  and the related  consolidated
statements of income and comprehensive  income,  changes in shareholders' equity
and cash flows for each of the years in the three-year period ended December 31,
2005, and the related financial statement schedule,  management's  assessment of
the  effectiveness of internal  control over financial  reporting as of December
31, 2005, and the effectiveness of internal control over financial  reporting as
of December  31, 2005,  which  reports  appear in the December 31, 2005,  annual
report on Form 10-K of SJW Corp.

/s/ KPMG LLP

Mountain View, CA
February 24, 2006