An installment plan of redemption may be initiated on any tax-defaulted property anytime up to p.m. CHDC offers a variety of down payment assistance programs, either directly or through our affiliate organizations and partners.If you have additional question regarding your property tax bill, please contact the Contra Costa County Assessor. What is a document number? • Don't pay money to have someone fill out housing assistance application and recertification forms for you. • Don't pay money to move up on a waiting list. By mailing in a check. • Different Mortgage Loan types • Down Payment options • Closing Costs – Who pays what?