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The zoning layer constitutes the official zoning map for Loudoun County and is a component of the official zoning ordinance. It reflects expiration of grandfathering provisions of the 1972 Zoning Ordinance for certain proffered PD-H and R-Districts created prior to June 16, 1993. The zoning data is owned and maintained by Loudoun County, Virginia Department of Building and Development. Purpose: The purpose is to facilitate the administration of the zoning ordinance. The data are used extensively for taxation, subdivision review, permitting, and planning. Supplemental Information: Boundaries generally follow parcel lines, although there are several exceptions. The zoning data does not include zoning overlay districts, such as LDN, Floodplain, Quarry, or Mountainside Overlay Districts. Although the layer represents the official zoning map, a determination should be requested from the Zoning Administrator to verify zoning for a particular property. Data are stored in the corporate ArcSDE Geodatabase as a feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN. It is also important to note that in order to determine the Zoning Ordinance Amendments (ZOAMs) that are applicable to a particular parcel governed under the Revised 1993 Zoning Ordinance located within the Route 28 Tax District, the ZO_ZONE_DATE, Opt-In Letter, proffer statement, rezoning plat and/or concept development plan should be consulted as applicable. For an official determination regarding the applicable zoning, zoning ordinance text and/or whether proffered conditions may apply to a certain property, please contact the Zoning Administrator in the Department of Building and Development. Data are stored in the corporate ArcSDE Geodatabase as a feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN. Maintenance and Update Frequency: The zoning layer is updated on a daily basis as staff researches zoning for individual properties. Completeness Report: Features may have been eliminated or generalized due to scale and intended use. To assist Loudoun County, Virginia in the maintenance of the data, please provide any information concerning discovered errors, omissions, or other discrepancies found in the data. Ordinance: 1972, 1993 or Revised 1993; ordinance under which the property is administered; does not necessarily correspond to the zone (e.g. a property may have a zone code of PDH3 for the zone in accordance with the 1993 ordinance, but it should have a value of 1972 for ordinance if it is administered as another zone, such as PDH24, under the 1972 ordinance). The zone a property is administered as is not carried in the layer. Due to a court order, it is important to note that there are two developments that remain to be governed under 1972 Zoning Ordinance that are located outside of the Route 28 Tax District. These are the PD-H zoned areas of Mirror Ridge and Countryside. It is noted that these areas were already reflected under the 1972 Zoning Ordinance on previous zoning maps. Zone Codes: A10- Agriculture: Agriculture and low density residential development with a maximum density of one unit per 10 acres. Cluster and hamlet options. A3- Agricultural/Residential: Agriculture and low density residential development with a maximum density of one unit per 3 acres with a predominantly agricultural character. Cluster and hamlet options. AR1- Agricultural Rural - 1: Rural business and residential uses: 1.0 du per 20-acres/; 1.0 du per 10 clustered AR2- Agricultural Rural - 2: Rural business and residential uses: 1.0 du per 40-acres/; 1.0 du per 20 clustered C1- Commercial: Commercial primarily retail and personal services. C1 is under 1972 ordinance and is only within the Route 28 Tax District. CLI- Commercial/Light Industry: Mix of compatible light industrial uses, industrial-related business uses, and related retail uses on minimum two acre lots. Only along Route 50 from Fairfax/Loudoun County line west to Route 659. New CLI district rezoning limited to parcels contiguous to existing CLI district. CR1- Countryside Residential-1: Residential development with a maximum density of 1 unit per acre. Not served by public water and sewer. Cluster and hamlet options. CR2- Countryside Residential-2: Residential development with a maximum density of 2 units per acre. Not served by public water and sewer. Cluster option with public water and/or sewer. CR3- Countryside Residential-3: Residential development with a maximum density of 3 units per acre. Not served by public water and sewer. Cluster option with public sewer. CR4- Countryside Residential-4: Residential development with a maximum density of 4 units per acre. Not served by public water and sewer. GB- General Business: General destination retail and service businesses that serve the needs of residents and businesses in the vicinity, on one-half acre lots. Access to major collector or arterial roads (but cannot front on or abut collector or arterial roads). I1- Industrial: Primarily heavy industrial. I1 is under 1972 ordinance and is only within the Route 28 Tax District. IAD- Dulles: Washington-Dulles International Airport JLMA1- Joint Land Management Area-1: Residential uses, cluster and traditional town subdivision design; 1.0 du/40,000 sq. ft. JLMA2- Joint Land Management Area-2: Residential uses, cluster and traditional town subdivision design; 1.0 du/20,000 sq. ft. JLMA3- Joint Land Management Area-3: Residential uses, cluster and traditional town subdivision design; 1.0 du per 3 acres JLMA20- Joint Land Management Area-20: Rural business and residential uses, large lot subdivision design (no cluster option); 1.0 du per 20 acres MRHI- Mineral Resource/Heavy Industry: Diabase resource extraction operations (quarries) co-located with compatible heavy industrial uses. Specific use limitations for stone quarry operations. PDAAAR- Planned Development-Active Adult/Age Restricted: Planned adult residential communities. PDAAAR districts have a minimum of 25 acres, public sewer and water, and are served by one or more major arterial or collector roads. Consistent with locations designated for high-density urban residential development. PDCCCC- Planned Development-Commercial Center (Community Center): Serves retail shopping needs of surrounding community. Minimum of 6 acres, maximum of 20 acres. PDCCNC- Planned Development-Commercial Center (Neighborhood Center): Serves convenience needs of adjacent residential neighborhoods. Minimum of 1.5 acres, maximum of 6 acres. PDCCRC- Planned Development-Commercial Center (Regional Center): Large scale commercial centers which provide a wide range of retail, office, and service uses, with one or more anchor stores, to the regional market. Minimum of 60 acres with controlled access to arterial roads. PDCCSC- Planned Development-Commercial Center (Small Regional Center): Small regional centers consisting of individual large and small scale commercial uses selling a broad range of goods or services to a market beyond the local community. Minimum of 20 acres, maximum of 60 acres. Controlled access to a major collector. PDCH- Planned Development-Commercial Highway: Highway related commercial districts. PDCH is under the 1972 ordinance and is only within the Route 28 Tax District. PDGI- Planned Development-General Industrial: Medium intensity industrial uses with public nuisance. potential. PDH3- Planned Development Housing-3: Mixed use residential communities including single family and multifamily housing products with supportive non-residential uses, subject to an adopted concept development plan. Maximum overall residential density of 3 units per acre. PDH4- Planned Development Housing-4: Mixed use residential communities including single family and multifamily housing products with supportive non-residential uses, subject to an adopted concept development plan. Maximum overall residential density of 4 units per acre. PDH6- Planned Development Housing-6: Mixed use residential communities including single family and multifamily housing products with supportive non-residential uses, subject to an adopted concept development plan. Maximum overall residential density of 6 units per acre. PDIP- Planned Development-Industrial Park: Light and medium industrial uses with supporting accessory uses and facilities designed with a parklike environment. May be subject to a concept development plan. PDMUB- Planned Development-Mixed Use Business: A compact pedestrian oriented mixed use business district of regional office, light industrian, retail, service, civic and high density residential uses located in close proximity to each other. Minimum size of 25 acres per District. PDOP- Planned Development-Office Park: Office park established primarily for administrative, business, and professional offices designed in a parklike environment and subject to an adopted concept development plan. PDRDP- Planned Development-Research and Development Park: Planned mixed employment park, subject to an adopted concept development plan, which allows the mixing of research and development firms, office complexes, certain types of manufacturing and interrelated land uses. PDRV- Planned Development-Rural Village: A rural, pedestrian oriented, mixed use community consisting of single family detached houses, townhomes, apartments, stores, and employment centers located on 20% of the

More MetadataThe Village Conservation Overlay District (VCOD) layer is a zoning overlay district of the Revised 1993 Loudoun County Zoning Ordinance (Zoning Ordinance) and identifies thirteen small villages and hamlets outside of the boundaries of Loudoun County’s incorporated towns and planned residential communities that contain unique, scenic and historic characteristics that should be maintained and protected. The VCOD is a component of the Official Zoning Ordinance adopted by the Board of Supervisors on January 6, 2003, effective on January 7, 2003, and the Zoning Ordinance further amended on December 6, 2006, and is shown on the Official Loudoun County, VA Zoning Map. The VCOD layer is owned and maintained by Loudoun County, Virginia Department of Building and Development.Purpose:The VCOD is established to recognize the development patterns existing in traditional villages, considered to be valuable heritage resources, and to encourage the retention and reinforcement of the pattern, character and visual identity of the individual village. The data are used extensively for taxation, subdivision review, permitting, and planning. Although the feature class represents the VCOD, a determination should be requested from the Zoning Administrator to verify whether a particular property is located within the VCOD.

Proffered conditions may apply to certain properties. To determine whether proffered conditions apply or to determine the zoning of a specific property, please contact the Zoning Administrator. For more information, please visit the Loudoun County webpage on the Zoning Ordinance, or contact the Department of Planning and Zoning

More MetadataThis layer identifies existing structures within Loudoun County and their current Land Use. The existing structures data source is Loudoun County VA, Office of Mapping & Geographic Information's (OMAGI) addressable structure layer for all of Loudoun County, VA.All residential uses, which includes Single Family, Multi-Family and Group Quarter uses, and Commercial structures (Offices, Retail, Medical Offices, Data Centers, etc) are speciified. The other uses specifically identified are Vacant (Address point assigned but no building permit issued), Miscellaneous (no employment generating), and Multi-Use (2 different uses).

The data set identifies the six county-administered Historic and Cultural Conservation District areas within Loudoun County. The County-designated districts include six Historic and Cultural Conservation Districts (Aldie, Bluemont, Goose Creek, Oatlands, Taylorstown, and Waterford) and one Historic Roadways District (Beaverdam Creek). The Historic Districts are Zoning Overlay Districts and are subject to Loudoun County Zoning Ordinance, Article VI, Section 6-1800, Designation of Historic Districts and Section 6-1900, Permits in Historic Districts. The Beaverdam Creek Historic Roadways District differs from the other districts, as the Roadways District only includes the part of the parcel located within a 35-foot buffer in each direction from the centerline of a designated roadway. The Planning Department administers the County's Historic Districts Program.

This map identifies the six county-administered Historic and Cultural Conservation District areas and the four towns-administered Historic Districts within Loudoun County. The County-designated districts include six Historic and Cultural Conservation Districts (Aldie, Bluemont, Goose Creek, Oatlands, Taylorstown, and Waterford) and one Historic Roadways District (Beaverdam Creek). The Historic Districts are Zoning Overlay Districts and are subject to Loudoun County Zoning Ordinance, Article VI, Section 6-1800, Designation of Historic Districts and Section 6-1900, Permits in Historic Districts. The Beaverdam Creek Historic Roadways District differs from the other districts, as the Roadways District only includes the part of the parcel located within a 35-foot buffer in each direction from the centerline of a designated roadway. The Planning Department administers the County's Historic Districts Program.

River and Stream Corridor Resources (RSCR) is a part of the Natural and Environmental Resources chapter of the new Loudoun County Zoning Ordinance adopted on Dec 13, 2023. The River and Stream Corridor Resources is composed of the following areas; Floodplain Overlay District and Adjacent Steep Slopes (Resource Area Width), 50' Riparian Protection Buffer Width, and Variable Riparian Preservation Buffer Width (remaining area to meet either the 100' or 300' minimum stream buffer. The 300' minimum stream buffer applies to the County's Scenic Rivers (Goose Creek & Catoctin Stream), Potomac River, Bull Run and Broad Run. The 100' minimum stream buffer applies to all other rivers and streams located within the Floodplain Overlay District. The minimum stream buffer distances for the RSCR are measured out from the either both edges of the County's double line stream data or from the centerline of the single line stream data. In some cases, the additional 50' Riparian Protection Buffer to the Resource Area Width (Floodplain and steep slopes) may result in a total RSCR width that is greater than the 100' or 300' minimum stream buffer width. Refer to Chapter 6 of the Loudoun County Zoning Ordinance for additional tables and graphs describing the RSCR and list of Natural and Environmental Resources permitted and special exception uses in both the RSCR and steep slopes.

Residential Pipeline is an inventory of development projects that have been approved but not yet built residential units in Loudoun County. The Pipeline includes by-right and legislative (rezoning) developments. If Loudoun County has issued a building permit for a unit, that unit is counted as built. Completed projects are not included in the Pipeline.

Approved Units - Permitted/Built Units = Remaining Pipeline Units

Residential Pipeline Web Applications

The Department of Planning and Zoning has developed two Residential Pipeline Web Applications to visually show the location of developments.

• Residential Pipeline by Fiscal Planning Subarea
• Residential Pipeline by Loudoun County 2019 General Plan Policy Areas

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This GIS layer contains the geographical boundaries of the 2010 census tracts for Loudoun County, Virginia. The 2010 Census tract boundaries are used for Census Bureau statistical data tabulation purposes, including the 2010 Decennial Census and American Community Surveys.

Census tracts are part of the sub-county census geography hierarchy of tracts, block groups, and blocks. The three census geographies nest to each other, forming a hierarchy of census tract, followed by block groups, and then blocks, with blocks being the smallest. A census tract consists of one or more census block groups and is a cluster of census blocks within the same census tract. Tracts are uniquely identified within a County by a six digit number. The last two digits will be zeros unless earlier divisions of the census tract occurred as a result of population growth.

Loudoun County's tracts were delineated by Loudoun County Government during the Census Bureau's Participant Statistical Areas Program for the 2010 Census. The 2010 Census tract layer has been modified from the Census Bureau's Tiger line file. Users should be aware that the Census's Tiger line data is devised from a mix of national and local GIS data sets. When the Tiger line data is overlaid with Loudoun County Government's detailed GIS layers it can be determined that the Census Bureau's Tiger line boundaries in some cases are slightly off from the actual location of the physical features, natural features, and governmental units such as town boundaries that they are designated to follow. The 2010 Loudoun census tract layer was generated by Loudoun County so that the tract boundaries would overlay with the features in Loudoun County's GIS data sets that the boundary are designated to follow.

This layer establishes the boundaries for Small Area Plans, authorized under Code of Virginia Section 15.2-2303.4, encompassing the Urban Policy Areas, Suburban Policy Area, Transition Policy Area, Leesburg JLMA, and the three Silver Line Metrorail Stations within the County. They areas are exempt from the proffer legislationprovisions established by Code of Virginia Section 15.2-2303.4.

Metadata

The Mountainside Development Overlay District is a zoning overlay district administered by the Department of Building and Development. Mountainside classifications are based upon the following criteria: critical elevation, debris flow (slippage) potential, groundwater recharge, soils, slope, and forest values. Critical elevation areas are determined from the County's digital topography, soil and slope values are based upon data, the County's soil layer, and forested areas are based upon the digital forest data. This original MDOD replaces the voided layer implemented in 2003 (see disclaimer above).

Purpose:

The Mountainside Development Overlay District is a zoning overlay district (see Section 4-1600 of the 1993 Loudoun County Zoning Ordinance) and regulates development on the mountainsides of the County. Mountainside data should be used for general planning purposes only and is not intended for use in delineating specific use or suitability of soils for a particular site. Areas prone to debris flow (slippage) may not be accurately delineated. The Department of Building and Development is responsible for final clearance and interpretation on zoning/building permits and land development applications for the Mountainside Development Overlay District.

ZOAM-2020-0002, Prime Agricultural Soils and Cluster Subdivision was adopted in June 2024, with an effective date of March 12, 2025, resulted in the amendment ordinances and revised regulations to improved cluster developments and use of prime agricultural soils in the Rural AR-1 and AR-2 Zoning Districts of the Rural Policy Area. The design of clustered residential development will be improved by incorporating natural features, protecting and conserving agriculturally productive prime agriculture soils, allowing for equine and rural economy uses, and further implementing the policies of the Loudoun County 2019 General Plan with respect to clustered residential development in order to guide all future cluster subdivision applications in the Rural North (AR-1) and Rural South (AR-2) Zoning Districts of the Rural Policy Area.As part of the ZOAM's approval, 15 soil types were identified as Prime Farmland Soils. They include the following soils types; 3A, 13B, 17B, 23B, 28B, 31B, 43B, 45B, 55B, 71B, 76B, 90B, 93B, 94B, 95B. All of these soil types are also currently identified as Prime Soils in the current Interpretive Guide to the use of Soils Maps; Loudoun County, VA, which further describes the soil mapping units within the Loudoun County Soils layer. The Interpretive Guide also identifies 3 other soil types as Prime Farmland Soils (17C, 70B, 70C) but for the purpose of this adopted ZOAM are not considered part of the new Prime Farmland Soils (Cluster Subdivision Option).This map shows, in small scale, a subset of the information contained on the individual detailed soil maps for Loudoun County by identifying the soil types that are considered Prime Farmland Soils (Cluster Subdivision Option). Because of its small scale and general soil descriptions, it is not suitable for planning small areas or specific sites, but it does present a general picture of soils in the County, and can show large areas generally suited to a particular kind of agriculture or other special land use. For more detailed and specific soils information, please refer to the detailed soils maps and other information available from the County Soil Scientist. Digital data consists of mapping units of the various soil types found in Loudoun County, Virginia. The data were collected by digitizing manuscript maps derived from USDA soil maps and supplemented by both field work and geological data. Field work for the soil survey was first conducted between 1947 and 1952. Soils were originally shown at the scale of 1:15840 and then redrafted by the County soil scientist to 1:12000; the data were redrafted a final time to fit Loudoun County's base map standard of 1:2400. Although the current data rely heavily on the original soil survey, there have been extensive field checks and alterations to the soil map based on current soil concepts and land use. The data are updated as field site inspections or interpretation changes occur.

The abundance of natural, environmental and heritage resources define Loudoun County’s unique sense of place. These natural, environmental and heritage resources include:

• The Potomac River, other major rivers and smaller stream corridors
• Floodplains
• Wetlands
• Steep slopes
• Ridges and mountainsides
• Forested and vegetative landscapes
• Limestone geology areas
• Farmlands
• Soil resources
• Important plant and wildlife habitats
• Historic and archaeological sites
• Scenic areas and corridors
• Designated heritage areas
• Battlefields
• Historic cemeteries
• Cultural landscapes

The Loudoun County 2019 Comprehensive Plan contains policies that provide guidance for the preservation, protection and incorporation of natural, environmental and heritage resources as part of the site design and development process.

The Loudoun County Zoning Ordinance contains regulations and development standards that implement the county’s policies.

The preservation, protection and enhancement of the county’s natural, environmental and heritage resources contribute directly and indirectly to Loudoun’s economy and the quality of life of its residents and visitors.

This feature class contains the basic expected land uses, or place types, for specific areas for all of Loudoun County. The place type approach concentrates on the context of any area instead of typical land use categories and corresponding specific uses. Each place type category defines the basis expected land use for an area, but also the preferred development patterns, streetscapes, and design features to make each area visually distinctive and functional. Place types also provide greater flexibility in development than the previous planned land use approach.

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This layer identifies the Legacy Route 28 Optional Overlay Districts in Eastern Loudoun County. The districts provide additional development options for the properties mapped as specified in Article 4 Division D of the Revised 1993 Zoning Ordinance.

Purpose:

This layer is used to depict the properties along the Route 28 Corridor that are mapped for the Rt. 28 Optional Overlay Districts. The Rt. 28 Optional Overlay Districts are intended to provide planned development and incentive zoning as tools to coordinate new development with the Route 28 Corridor Plans goals and objectives.

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The Limestone Overlay District (LOD) is a zoning overlay district adopted by the Loudoun County Board of Supervisors on 2/17/2010 and administered by the Loudoun County Department of Building and Development. The Department is responsible for all development approvals, review procedures, modifications and density calculations in the LOD as governed by Article VI, "Development Process and Administration", of the Revised 1993 Zoning Ordinance, and procedures in Chapter 8 of the Facilities Standards manual. LOD is generally comprised of the following geologic formations: Cf-Frederick Limestone, Ct-Tomstown Dolomite, JTRc-Catharpin Creek Formation, JTRcg-Catharpin Creek Formation Goose Creek Member, TRbl-Balls Bluff Siltstone Leesburg Member, and TRbs-Balls Bluff Siltstone Fluvial and Deltaic Sandstone Member. The geographic area of the Limestone Overlay District (LOD) is generally east from the Catoctin Mountain Range to the Potomac River (excludes Lost Corner), and from just south of the Town of Leesburg north to Point of Rocks, MD (excludes the Town of Leesburg.)

Purpose: The land area delineated by the boundaries of the LOD is comprised of limestone and "Karst terrain" areas. The terrain is also characterized by the presence of certain natural features, such as sinkholes and rock outcrops. Thus, development on Karst terrain has a direct correlation to the potential for collapse and ground slippage and the susceptibility of groundwater and surface water pollution, and spring contamination, posing serious risks to public health, safety and welfare. The provisions of Section 4-1900 of the Revised 1993 Zoning Ordinance are intended to regulate land use and development in areas underlain by limestone and in areas with Karst features and terrain as shown on the official Limestone Overlay District Map of Loudoun County.

Data Owner: Department of Building and Development

The Existing Parcels and Structures map is an interactive tool that contains parcels and structures that are developed and maintained by the Department of Planning and Zoning. Please use the link to the Help Document found on the tool's splash screen and the application is best viewed on a tablet or desktop.

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The Spring Feature Protection layer depicts all known springs identified by existing Loudoun County Soils data within the MOD and each spring’s required 300-foot buffer. Areas of the required 300-foot buffers outside of the MOD were removed.

The Spring Feature Protection layer is intended to be used only as a reference. Better site-specific data may improve the precision and accuracy of the Spring Features layer. To assure that Loudoun County is using the best available Spring Feature data, please provide the Office of Mapping and Geographic Information with information concerning any errors, omissions, or other discrepancies discovered in this data.

The Residential Communities of Loudoun County map let's you search by address or by residential community (subdivision project) name. Click on a community for more information, including percent complete, the number of units allowed and left to build, and the size. Zoom in further to see the parcels within a community. You can also search by Other Name to find incorporated towns, villages, or historic place names.