DAY of each month without deduction or offset. The RPA is the foundation of every successful real estate transaction in the state of California.Contact us at 858.278. A collection of all the forms and and documents that are posted on the San Diego Housing Commission's (SDHC) website, listed in one location. Helpline and Online Forms are available as add-ons to your regular membership. Forms; Education. Back. Use a San Diego residential lease agreement to ensure a fair and legally compliant tenancy. Download your template here. Discover the steps to correctly add an addendum to your rental agreement in San Diego, CA. Enhance your lease agreement with our guide. Any problems when you fill out the rental application.