In real estate, a purchase agreement is a binding contract between a buyer and seller that outlines the details of a home sale transaction. You can locate Sample Contract Agreements on this page.Documents Sample Construction Agreement (PDF) Sample agreement to be used as a template. View current agendas and minutes for all boards and commissions. The California Department of Real Estate has published this booklet in response to an apparent need for information concerning disclosures. This Addendum is intended for use in the City of Oakland.