Record Lots

In most case scenarios, a piece of property must be a Record Lot before a building permit will be issued for that site in the District of Columbia, and all proposed Record Lots are carefully reviewed by Zoning Administration officials for compliance with the city’s Zoning Ordinances. Other agencies that review new record lots besides OS are Office of Zoning, Office of Planning, the Dept. of Public Works, Historic Preservation, and DDOT. Record lots are defined only when requested by property owners, normally when they are seeking a building permit. Record lots are recorded in Plat Books and Subdivision Books in the Office of the Surveyor. These documents are bound volumes of historical representations of the locations of property lines, and they include record dimensions, though typically no bearings of lines. These lots are located within squares, which usually correspond to one or two city blocks. Certain record lots can also be classified as “of-lots”. An "Of-Lot" is the D.C. Surveyor’s Office term for describing “Remaining/Part of Original Lot X” In the record lots (ply) layer, if a domain value of 1 exist in the “OF_LOT” field, the original lot was modified and should have a corresponding Subdivision. All “of-lots” will also have a tax lot overlaying them since it is a piece or remainder of an original Record Lot.在多数情形下，美国哥伦比亚特区（District of Columbia）内的地块若要获取建设许可，需先完成记录地块（Record Lot）认定；所有拟申报的记录地块均需接受分区管理局官员的严格审核，以确保其符合本市分区条例的要求。除OS外，其他负责审核新记录地块的机构还包括分区办公室、规划办公室、公共工程部、历史保护部门以及DDOT。记录地块仅可由不动产所有人提出申请后方可认定，通常发生在其申请建设许可之时。记录地块的登记信息被收录于测量员办公室的地籍图册（Plat Books）与细分地块登记册（Subdivision Books）中。此类文档为装订成册的历史地籍界址位置档案，包含记录的界址尺寸数据，但通常不标注界址方位角。此类地块均坐落于街区单元（squares）范围内，一个街区单元通常对应1至2个城市街区。部分记录地块还可归类为“附属地块（of-lots）”。“附属地块（Of-Lot）”是哥伦比亚特区测量员办公室的专用术语，用于指代“原始地块X的剩余部分或分割部分”。在记录地块（ply）图层中，若‘OF_LOT’字段的域值为1，则表明该原始地块已被修改，且应存在对应的细分地块登记。由于附属地块为原始记录地块的分割部分或剩余部分，因此所有附属地块均会叠加有对应的计税地块（tax lot）信息。