Description: In 2011, the District of Columbia government commissioned a project to survey the Washington D.C. historic boundary stones set in 1791 and 1792 that define the Maryland and (then Virginia) border with the new Federal District. The majority of the stones were located using a field survey which employed a GPS-RTK. Surveyed accuracy is +/- 5cm horizontal and +/- 9cm vertical. The Washington D.C. Historic Boundary Stones were then connected to form the Washington D.C. Historic Boundary. However, this is not used for the planning, administration, or management of Washington D.C. The boundary stones do not form a perfect 10 mile by 10 mile square of DC, and are not perfectly aligned on each side. Given that they were placed over 200 years ago the survey is impressive, however they do not accurately reflect today's DC Administrative Boundary which was produced with more advanced methods and data.Excerpts from Boundarystone.org:The Residence Act of July 16, 1790, as amended March 3, 1791, authorized President George Washington to select a 100-square-mile site for the national capital on the Potomac River between Alexandria, Virginia, and Williamsport, Maryland. President Washington selected the southernmost location within these limits so that the capital would include all of present-day Old Town Alexandria, then one of the busiest ports in the country. Acting on instructions from Secretary of State Thomas Jefferson, Major Andrew Ellicott began his initial observations for a rough survey of the ten-mile square on Friday, February 11, 1791.Ellicott, a prominent professional surveyor, hired Benjamin Banneker, an astronomer and surveyor from Maryland, to make the astronomical observations and calculations necessary to establish the south corner of the square at Jones Point in Alexandria. According to legend, "Banneker fixed the position of the first stone by lying on his back to find the exact starting point for the survey ... and plotting six stars as they crossed his spot at a particular time of night." From there, Ellicott's team embarked on a forty-mile journey, surveying ten-mile lines first along the southwest line, then along The northwest line, next along the northeast line, and finally along the southeast line. The team completed this rough survey in April 1791.Ellicott's team then began the formal survey by clearing twenty feet of land on both sides of each boundary line and placing other stones, made of Aquia Creek sandstone, at one-mile intervals. The boundary stones are the oldest federal monuments. Although several stones have been moved or severely damaged, thirty-six stones from the 1790s are in or near their original locations, including all fourteen in the land that was returned to Virginia in the 1846-1847 retrocession. Three other locations have substitute stones (SW2, SE4, and SE8), and one location (NE1) is marked only by a plaque.Learn more at boundarystone.org.
Copyright Text: Office of the Chief Technology Officer
Description: District addresses for the District Land. The dataset contains of addresses for the District land (Owned, Operated, and Maintained), created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies. Databases researched by the DC Office of the Chief Technology Officer (OCTO) identified DC Agency locations and DC GIS staff geo-processed the data.
Copyright Text: Office of the Chief Technology Officer
Description: Affordable housing production and preservation projects are managed by the Department of Housing and Community Development (DHCD), the Deputy Mayor for Planning and Economic Development (DMPED), the DC Housing Authority, the DC Housing Finance Agency and DC's Inclusionary Zoning program. This dataset comprehensively covers affordable housing projects which started (i.e. reached financial closing and/or started construction) or completed since January of 2015. The data includes affordable housing projects (production and preservation, rental and for-sale) which were subsidized by DMPED, DHCD, DCHFA, or DCHA, and those which were produced as a result of Planned Unit Development (PUD) proffers or Inclusionary Zoning (IZ) requirements.
Copyright Text: Office of the Deputy Mayor for Planning and Economic Development
Description: The Office of the Deputy Mayor for Planning and Economic Development (DMPED) is charged with executing the Mayor's economic development strategy. DMPED manages a portfolio of real estate projects located across the District of Columbia. More information is available on the Project Pipeline Database (PPD) Public Access Dashboard.
Description: The Washington DC Economic Partnership (WDCEP) is a non-profit, public-private organization whose core purpose is to actively position, promote, and support economic development and business opportunities in Washington, DC. The data here were used to create the DC Development Report. Check Report Edition Year to filter publications. Visit www.wdcep.com for PDF publications. Although every attempt is made to ensure the quality of the information contained in the DC Development Report, WDCEP makes no warranty or guarantee as to its accuracy, completeness, or usefulness for any given purpose.WDCEP Data Notes:WDCEP data is provided "as is" and WDCEP makes no warranty or guarantee to its accuracy or usefulness for any given purpose. All data are estimates.projects include new construction & major renovationsnew construction does not necessarily mean "net new"estimated delivery dates may reference a first phase delivery or final phase deliverygroundbreaking & delivery dates are only valid for the year (months/days are estimates)pipeline data is subject to changepipeline projects may still need DC Government approval (zoning, DC Council, historic preservation, etc.)
Copyright Text: Washington DC Economic Partnership
Description: All applicants for a Basic Business License operating from a commercial location in the District of Columbia must provide a Certificate of Occupancy (C of O) for the premise address from which the business activity is conducted in order to demonstrate the activity does not conflict with building and zoning codes. A certificate of occupancy is needed to occupy any structure other than a single family dwelling. To include the following uses: two family flat, apartment house, and all commercial uses.
Description: This layer is a subset of ITSPE and and UBIDs representing vacant and blighted property building addresses which are directly correlated with Vacant and Blighted Property Building Footprints. The tax assessment roll public extract (ITSPE) is used for assessment and property analysis, to send property tax bills and notices, and stores comprehensive tax information such as ownership, mailing addresses, non-contiguous Air Rights lots (Multifamily or Development), Air Rights lots, possessory interest lots, record lots, tax lots, parcels, condominiums, and federally owned lands such as reservations and appropriations. The linkage from the Vector Property layers to this database is SSL (Square, Suffix, and Lot). The UBID data was originally created by spatially joining the 2019 building footprints published in DC Open Data with the Common Ownership Lots. The UBIDs were coded using US DOE’s Implementation code. Search for UBID and ITSPE in Open Data DC for individual documentation.
Copyright Text: Office of the Chief Financial Officer
Description: A layer showing the District of Columbia government related structures. The dataset contains polygons representing District Government related structures on Government property created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) using the Department of Energy and Environment’s Unique Building Identifier (UBID) data. The tax assessment roll public extract (ITSPE) is used for assessment and property analysis, to send property tax bills and notices, and stores comprehensive tax information such as ownership, mailing addresses, non-contiguous Air Rights lots (Multifamily or Development), Air Rights lots, possessory interest lots, record lots, tax lots, parcels, condominiums, and federally owned lands such as reservations and appropriations. The linkage from the Vector Property layers to this database is SSL (Square, Suffix, and Lot). The UBID data was originally created by spatially joining the 2019 building footprints published in DC Open Data with the Common Ownership Lots. The UBIDs were coded using US DOE’s Implementation code. Search for UBID and ITSPE in Open Data DC for individual documentation.
Copyright Text: Office of the Chief Financial Officer, Department of Energy and Environment’s, Office of the Chief Technology Officer
Description: This dataset contains polygons that represent the boundaries of assessment subneighborhoods as defined by the DC Office of Tax and Revenue (OTR) Real Property Tax Administration (RPTA). For analysis purposes, RPTA delineates assessment neighborhoods to group properties that are affected by similar economic, political, governmental, and environmental factors. Assessment subneighborhoods are defined by the environment of a subject property that has a direct and immediate effect on its value. The assessment subneighborhood is a geographic area (in which there are typically fewer than several thousand properties) defined for some useful purpose, such as to ensure for later multiple regression modeling that the properties are homogeneous and share important locational characteristics. Assessment neighborhoods boundaries typically follow street centerlines, hydrological boundaries, and boundaries of major properties such as parks and monuments.These do not reflect precise neighborhood locations and do not necessarily include all commonly-used neighborhood designations. There is no formal set of standards that describes which neighborhoods are included in this dataset. Note that the District of Columbia does not have official neighborhood boundaries.
Description: This dataset contains polygons that represent the boundaries of assessment neighborhoods as defined by the DC Office of Tax and Revenue (OTR) Real Property Tax Administration (RPTA). For analysis purposes, RPTA delineates assessment neighborhoods to group properties that are affected by similar economic, political, governmental, and environmental factors. Assessment neighborhoods are defined by the environment of a subject property that has a direct and immediate effect on its value. The assessment neighborhood is a geographic area (in which there are typically fewer than several thousand properties) defined for some useful purpose, such as to ensure for later multiple regression modeling that the properties are homogeneous and share important locational characteristics. Assessment neighborhoods boundaries typically follow street centerlines, hydrological boundaries, and boundaries of major properties such as parks and monuments.These do not reflect precise neighborhood locations and do not necessarily include all commonly-used neighborhood designations. There is no formal set of standards that describes which neighborhoods are included in this dataset. Note that the District of Columbia does not have official neighborhood boundaries.
Description: This layer is a subset of ITSPE and and UBIDs representing vacant and blighted property building footprints. The tax assessment roll public extract (ITSPE) is used for assessment and property analysis, to send property tax bills and notices, and stores comprehensive tax information such as ownership, mailing addresses, non-contiguous Air Rights lots (Multifamily or Development), Air Rights lots, possessory interest lots, record lots, tax lots, parcels, condominiums, and federally owned lands such as reservations and appropriations. The linkage from the Vector Property layers to this database is SSL (Square, Suffix, and Lot). The UBID data was originally created by spatially joining the 2019 building footprints published in DC Open Data with the Common Ownership Lots. The UBIDs were coded using US DOE’s Implementation code. Search for UBID and ITSPE in Open Data DC for individual documentation.
Copyright Text: Office of the Chief Financial Officer
Description: Military Facilities. The dataset contains locations and attributes of Military Facilities, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies. Information researched by the DC Office of the Chief Technology Officer identified Military Facilities and DC GIS staff geo-processed the data.
Copyright Text: DC Office of the Chief Technology Officer
Description: A layer showing District of Columbia government related properties (owned, operated, and or managed) to be used by many DC Government agencies, private companies and the public. It supports the daily business process of District agencies that originate and manage land records. Transfers of Jurisdiction (TOJ) are also in this layer. This map should not be considered comprehensive as District agencies continuously work to update properties as transactions occur.
Copyright Text: Department of General Services (DGS)
Mayor’s Office for Economic Development (DMPED)
Office of the Chief Technology Officer, Geospatial & BI Program
Office of the Chief Financial Officer, Real Property Tax Administration (RPTA)
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VALIDATIONSTATUS
(
type: esriFieldTypeSmallInteger, alias: Validation Status
, Coded Values:
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Description: The tax assessment roll public extract (ITSPE) is used for assessment and property analysis, to send property tax bills and notices, and stores comprehensive tax information such as ownership, mailing addresses, non-contiguous Air Rights lots (Multifamily or Development), Air Rights lots, possessory interest lots, record lots, tax lots, parcels, condominiums, and federally owned lands such as reservations and appropriations. The linkage from the Vector Property layers to this database is SSL (Square, Suffix, and Lot). It should be noted that not all record lots have a direct 1:1 relationship to information in this database. The most obvious examples would be when a tax lot was created from existing record lots. In this case, only the tax lot would have linkage to the ITSPE, not the underlying record lots (though they still exist). Reservations that have been converted into tax lots are an additional example where the reservation still exists, however for taxation purposes the tax lot (overlay) supersedes and has corresponding linkage to ITS. The same is true for most Condominiums and the ground surface lot (Record) which still exist (common space) or the previous overlay (Air Right or Tax lot), only the Condo lot would have linkage to (ITSPE).
Copyright Text: Office of the Chief Financial Officer
Description: This table is a subset of ITSPE and represents vacant and blighted property. The tax assessment roll public extract (ITSPE) is used for assessment and property analysis, to send property tax bills and notices, and stores comprehensive tax information such as ownership, mailing addresses, non-contiguous Air Rights lots (Multifamily or Development), Air Rights lots, possessory interest lots, record lots, tax lots, parcels, condominiums, and federally owned lands such as reservations and appropriations. The linkage from the Vector Property layers to this database is SSL (Square, Suffix, and Lot). It should be noted that not all record lots have a direct 1:1 relationship to information in this database. The most obvious examples would be when a tax lot was created from existing record lots. In this case, only the tax lot would have linkage to the ITSPE, not the underlying record lots (though they still exist). Reservations that have been converted into tax lots are an additional example where the reservation still exists, however for taxation purposes the tax lot (overlay) supersedes and has corresponding linkage to ITS. The same is true for most Condominiums and the ground surface lot (Record) which still exist (common space) or the previous overlay (Air Right or Tax lot), only the Condo lot would have linkage to (ITSPE).
Copyright Text: Office of the Chief Financial Officer
Description: This table is a subset of ITSPE and represents vacant property. The tax assessment roll public extract (ITSPE) is used for assessment and property analysis, to send property tax bills and notices, and stores comprehensive tax information such as ownership, mailing addresses, non-contiguous Air Rights lots (Multifamily or Development), Air Rights lots, possessory interest lots, record lots, tax lots, parcels, condominiums, and federally owned lands such as reservations and appropriations. The linkage from the Vector Property layers to this database is SSL (Square, Suffix, and Lot). It should be noted that not all record lots have a direct 1:1 relationship to information in this database. The most obvious examples would be when a tax lot was created from existing record lots. In this case, only the tax lot would have linkage to the ITSPE, not the underlying record lots (though they still exist). Reservations that have been converted into tax lots are an additional example where the reservation still exists, however for taxation purposes the tax lot (overlay) supersedes and has corresponding linkage to ITS. The same is true for most Condominiums and the ground surface lot (Record) which still exist (common space) or the previous overlay (Air Right or Tax lot), only the Condo lot would have linkage to (ITSPE).
Copyright Text: Office of the Chief Financial Officer
Description: The tax assessment roll public extract (ITSPE) is used for assessment and property analysis, to send property tax bills and notices, and stores comprehensive tax information such as ownership, mailing addresses, non-contiguous Air Rights lots (Multifamily or Development), Air Rights lots, possessory interest lots, record lots, tax lots, parcels, condominiums, and federally owned lands such as reservations and appropriations. The linkage from the Vector Property layers to this database is SSL (Square, Suffix, and Lot). It should be noted that not all record lots have a direct 1:1 relationship to information in this database. The most obvious examples would be when a tax lot was created from existing record lots. In this case, only the tax lot would have linkage to the ITSPE, not the underlying record lots (though they still exist). Reservations that have been converted into tax lots are an additional example where the reservation still exists, however for taxation purposes the tax lot (overlay) supersedes and has corresponding linkage to ITS. The same is true for most Condominiums and the ground surface lot (Record) which still exist (common space) or the previous overlay (Air Right or Tax lot), only the Condo lot would have linkage to (ITSPE). This table has fewer fields than the ITSPE and clarifies the abbreviated column names from the Data Dictionary.
Copyright Text: Office of the Chief Financial Officer
Description: A table with tax rate codes for the Integrated Tax System Public Extract (ITSPE) data layers. The ITS database also processes notices and tax bills. Public extract of the database used for sending tax bills, also known as tax assessment roll. ITS stores comprehensive tax information such as ownership, mailing addresses etc of record lots, tax lots, parcels, condominiums and federally owned lands such as reservations and appropriations.
Description: A table with mix tax type codes for the Integrated Tax System Public Extract (ITSPE) data layers. Public extract of the database used for sending tax bills, also known as tax assessment roll. ITS stores comprehensive tax information such as ownership, mailing addresses etc of record lots, tax lots, parcels, condominiums and federally owned lands such as reservations and appropriations. This database also processes notices and tax bills.
Description: The Regimes are how Office of Tax and Revenue (OTR) quantifies units in a given condo development, grouping of condos. A condo regime number is assigned to each residential condo application or Article of Confederation regardless of how many buildings there are at any one site. The regime number starts with a 1, 2, or 3 depending upon where the condo is located and where they fall in the assessment process of Real Property Tax Assessment (RPTA). All numbers after the first are consecutive. RPTA maintains the master list of Regime numbers for residential properties. Commercial condos are not associated with a Regime number.Condo lots are individual lots for each condominium. The lot numbers normally range from 2000-6999. These condo lots are not geographically defined other than being within a air rights, record, tax or a combination of lots that has one or more condo buildings within it.
Description: 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.
Copyright Text: Office of the Chief Financial Officer
Description: 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.
Copyright Text: Office of the Chief Financial Officer
Description: 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.
Copyright Text: Office of the Chief Financial Officer
Description: The table represents documentation (Book & Page) approved for condominium development. Projects can be built in multiple phases and thus the potential for several condo subdivisions per on dwelling. Users can join this table with the following map and table layers:Common Ownership LotsVector Property Map LayersCondo Approval Lots Condo Relate Tableto view all related condo subdivsions
Description: The Washington DC Economic Partnership (WDCEP) is a non-profit, public-private organization whose core purpose is to actively position, promote, and support economic development and business opportunities in Washington, DC. The data here were used to create the DC Development Report. Check Report Edition Year to filter publications. Visit www.wdcep.com for PDF publications. Although every attempt is made to ensure the quality of the information contained in the DC Development Report, WDCEP makes no warranty or guarantee as to its accuracy, completeness, or usefulness for any given purpose.WDCEP Data Notes:WDCEP data is provided "as is" and WDCEP makes no warranty or guarantee to its accuracy or usefulness for any given purpose. All data are estimates.projects include new construction & major renovationsnew construction does not necessarily mean "net new"estimated delivery dates may reference a first phase delivery or final phase deliverygroundbreaking & delivery dates are only valid for the year (months/days are estimates)pipeline data is subject to changepipeline projects may still need DC Government approval (zoning, DC Council, historic preservation, etc.)
Copyright Text: Washington DC Economic Partnership
Description: Exemption From DC Real Property Tax is for use by nonprofit organizations who wish to apply for exemption from the District of Columbia real property tax, must own the real property for which the request is made, and qualify under DC Official Code § 47-1002. The applicant must specify the subsection of § 47-1002, detailing the major categories of exempt property, pursuant to which the exemption is sought. Current and proposed use of the property must be indicated, and a physical inspection of the property by this office is required. If any part of the property is leased, the tenant must supply the same types of documents that the owner must furnish with this application. Applications for exemption for property owned by foreign governments must be made through the US Department of State, Office of Foreign Missions. The exemption, if approved, will commence the first full month following the date the application is approved, provided the requirements for exemption are met. The tax type values for properties are: DC, E0-E9 and US.
Description: Table defining the fields for the attribute table of the owner points feature. It reflects the new table structure OTR adopted in Tax Year 2005 reflecting the systems update to the public release file.
Description: The Property Use Code table contains a code, brief description and long description of DC's property use code system. It provides a complete set of the currently available use codes (with their descriptions) that are applicable to various categories of property. A property use code identifies the predominant use of a parcel of real property (and in certain limited instances, other property characteristics are also identified). Visit http://otr.cfo.dc.gov/publication/real-property-use-code-listing for more info.