Overlay districts are used in combination with base districts to modify or expand base district regulations. They adapt to the special needs of areas of the City and further allow Seward's Unified Land Development Ordinance to evolve as the planning and development needs and trends of specific areas also change. The overlay districts are designed to achieve the following objectives:
A. 
To recognize special conditions in specific parts of the City which require specific regulation.
B. 
To provide for the protection of special features in the natural and built environment of the City.
C. 
To allow for change and adaptability to different needs and trends in land development.
D. 
To encourage comprehensive neighborhood and environmental planning in the City, and to protect the integrity of vital City services such as the water supply and airport operation.
E. 
To provide flexibility in development and to encourage innovative design through comprehensively planned projects.
The following overlay districts are hereby established:
Overlay Districts
PUD
Planned Unit Development District
TND
Traditional Neighborhood Development District
RC
Rural Conservation Development Overlay District
HD
Historic and Neighborhood Conservation Overlay District
FP/FW
Floodplain/Floodway Overlay District
AV
Aviation Overlay District