Westchester County Department of County Planning

The Planning Department conducts a comprehensive work program and shapes and influences growth and development in Westchester County in order to improve quality of life and protect the environment, resulting in more livable and sustainable communities.

Three of the five specialized sections of the department – Land Use and Development, Housing and Environmental Planning – focus on the initiatives that carry out this mission. They utilize the technical expertise of the department’s two other sections – Design and Administration – to produce quality products and plans in the most cost-effective manner for county residents.

The Planning Department conducts a comprehensive work program and shapes and influences growth and development in Westchester County in order to improve quality of life and protect the environment, resulting in more livable and sustainable communities.

Three of the five specialized sections of the department – Land Use and Development, Housing and Environmental Planning – focus on the initiatives that carry out this mission. They utilize the technical expertise of the department’s two other sections – Design and Administration – to produce quality products and plans in the most cost-effective manner for county residents.

Activities within each section focus on the pattern of development, the natural environment and ways in which buildings, transportation and open space can be shaped or utilized to achieve a physical environment that fosters smart growth for Westchester County. The department staff works closely with other county departments, elected and appointed officials and staff of the 45 municipalities and private and non-profit businesses and organizations.

The work program includes activities that are mandated by the county charter, New York State and the federal governments. These include the review of certain proposed land use and zoning actions by municipalities, review of county capital projects and the environmental review (SEQR or NEPA) of all county projects and legislative actions.

The mailing address for the planning department is:

Westchester County Department of Planning
148 Martine Avenue, Room 432
White Plains, NY 10601-4704

If you have questions about specific topics, research or reports, contact the individual referenced in the relevant pages, where you'll find the contact name, phone number and e-mail address.

The Planning Department maintains a wide array of maps which can be viewed online or purchased in print. We are located on the 4th floor of the Michaelian Office Building at 148 Martine Ave. in White Plains. Go to directions. Our walk-in hours are from 9:00 a.m. to 4:00 p.m. on weekdays. For more information, contact Karen Duffy by e-mail at  or call (914) 995-4418.

The Westchester County Clerk's office maintains an extensive online database of land records and maps.  Go to online database.

Many of the mapped features and other geographic data layers including recent aerial photography can be viewed and downloaded from Westchester County's GIS Web site. Unless noted, most printed maps are at a scale of 1"=1 mile.

Maps that sell for $15.00 are individually printed on the department's color plotter. A few other maps (School Districts, Postal Zip Code Areas, e.g.) are offset printed in larger quantities and are sold at a lower price.