Computer Assisted Mass Appraisal - Condominium

Data source is the Office of Tax and Revenue’s Computer-Assisted Mass Appraisal (CAMA) system. The CAMA system is used by the Assessment Division (AD) within the Real Property Tax Administration to value real estate for ad valorem real property tax purposes. The intent of this data is to provide a sale history for active properties listed among the District of Columbia’s real property tax assessment roll. This data is updated daily. The AD constantly maintains sale data, adding new data and updating existing data. Daily updates represent a “snapshot” at the time the data was extracted from the CAMA system, and data is always subject to change.本数据集的数据源为税收与收入办公室（Office of Tax and Revenue）的计算机辅助批量评估（Computer-Assisted Mass Appraisal, CAMA）系统。该CAMA系统由不动产税收管理部门下设的评估司（Assessment Division, AD）使用，用于为从价计征不动产税的目的开展不动产价值评估工作。本数据集旨在提供哥伦比亚特区不动产税评估名册中所列有效不动产的交易历史，且每日更新。评估司会持续维护交易数据，新增数据内容并更新既有记录。每日更新仅为数据从CAMA系统提取时刻的“快照”，数据始终存在变更可能。