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Overlay Zones

T-D-O: Transit District Overlay - Intended to ensure that development in a designated district meets the goals established in a Transit District Development Plan. Transit Districts may be designated in the vicinity of Metro stations to maximize transit ridership, serve the economic and social goals of the area, and take advantage of the unique development opportunities which mass transit provides.

D-D-O: Development District Overlay - Intended to ensure that development in a designated district meets the goals established in a Master Plan, Master Plan Amendment or Sector Plan. Development Districts may be designated for town centers, Metro areas, commercial corridors, employment centers, revitalization areas, historic areas and other special areas as identified in approved plans.

CHESAPEAKE BAY CRITICAL AREA OVERLAY ZONES

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I-D-O: Intense Development Overlay - To conserve and enhance fish, wildlife, and plant habitats and improve the quality of runoff that enters the Chesapeake Bay, while accommodating existing residential, commercial, or industrial land uses. To promote new residential, commercial and industrial land uses with development intensity limits. Maximum residential density is the same as the underlying zone.

L-D-O: Limited Development Overlay - To maintain and/or improve the quality of runoff entering the tributaries of the Chesapeake Bay and to maintain existing areas of natural habitat, while accommodating additional low-or moderate-intensity development. Maximum residential density is the same as the underlying zone, up to 4.0 du/net acre maximum.

R-C-O: Resource Conservation Overlay - To provide adequate breeding, feeding and wintering habitats for wildlife, to protect the land and water resources base necessary to support resource-oriented land uses, and to conserve existing woodland and forests for water quality benefits along the tributaries of the Chesapeake Bay. Maximum residential density - .05 du/ gross acre.

REVITALIZATION OVERLAY DISTRICTS

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R-O-D: Revitalization Overlay District - Intended to ensure the orderly development or redevelopment of land within a designated district. Revitalization Districts provide a mechanism for the county to delegate full authority to local municipalities to approve departures from parking, landscaping and sign standards. In addition, limited authority is also delegated for the approval of variances from building setbacks, lot coverage, yards and other dimensional requirements of existing zoning.

ARCHITECTURAL OVERLAY DISTRICTS

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A-C-O: Architectural Conservation Overlay - Intended to ensure that development and redevelopment efforts preserve and protect the architectural or design character of neighborhoods in accordance with an approved Architectural Conservation Plan. Conservation Districts may be designated in areas where the majority of properties have been developed and they exhibit distinct, unifying elements, characteristics, design or other physical features.


2-These overlay zones are superimposed over other zones, and they may modify provisions of the underlying zones concerning uses allowed and standards for development. In addition, new development is generally subject to approval of a Detailed Site Plan by the Planning Board.

3-These overlay zones are superimposed over other zones, and they may modify provisions of the underlying zones concerning uses allowed and standards for development. In addition, new development is generally subject to approval of a Conservation Plan and Conservation Agreement by the Planning Board.

4-These overlay districts are superimposed over other zones. However, they do not modify provisions of the underlying zones concerning uses allowed and standards for development.

5-These overlay zones are superimposed over other zones, and they may modify provisions of the underlying zones concerning design regulations. Howver, they do not modify provisions of the underlying zones concerning allowed uses. In addition, a Detailed Site Plan for Architectural Conservation shall be approved by the Planning Board prior to the issuance of a building or grading permit.