Shop around for lenders who do handle CalPERS
But whatever you do, try to speak with local lenders --- don't go online to E-Loan or Quicken Loans, and other such companies who promise that they will preapprove you for the loan.
The biggest headaches we and our clients have is working with out-of-state lenders and out-of-area appraisers who are hard to get hold of, who do not respond in time, who misrepresent themselves and what they offer (as in an experience we had with Quicken Loans).
Since buying property is one of the most significant purchases you will make, it behooves you to work with someone with whom you can sit down with, whom you can call directly after hours if necessary to resolve a problem, who treats you as a client and not as a number and who can work WITH you and your realtor and who will not take an adversarial position while working on the loan.
Since you're in Alameda, call:
Your Personal Mortgage Consultant for Life
He is one of the most resourceful, trustworthy, responsive and reliable independent mortgage brokers I know. I am sure he can help you.