1 Exhibit 24.2 (Deloitte and Touche Letterhead) INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Heritage Commerce Corp on Form S-8 of our report dated January 20, 1999 (February 5, 1999 as to the stock split information), appearing in the Annual Report on Form 10-K of Heritage Commerce Corp for the year ended December 31, 1998. /s/ Deloitte and Touche LLP January 19, 2000 12