Closely related to the principle of smart growth, infill development involves building and developing in vacant areas in city centers or urban settings. This promotes the betterment of these city centers and leaves rural areas and open spaces undeveloped. Advocates state that infill development can reduce traffic congestion, save open space, and create more livable communities.

• Strategies for Successful Infill Development --Sponsored by The Congress for New Urbanism and Northeast Midwest Institute. This document (PDF) contains case studies, definitions, ideal methods of implementation, and specific design strategies.

• The Greenbelt Alliance and infill development in the Bay Area*-- This document (PDF) provides examples of Bay Area infill, the specifics of smart infill development, and additional resources. (*Scroll down to "Smart Infill" and download the PDF report)

• Infill development: Strategies for Shaping Livable Neighborhoods-- Municipal Research & Services Center produced this extensive report about the need for infill development with reference to the Washington state area.

• The scoop on infill development. The article describes the challenges, struggles, and benefits of choosing infill development with reference to Seattle, Washington. by Karen Anderson-Bittenbender (Intracorp Real Estate)

• The Planning Commissioner Journal -- produced a sprawl guide "infill housing" section that also has links to Phoenix, AZ and British Colombia.

• Better Urban Infill Development Program (BUILD) in Dane County, Wisconsin assists with smart growth in the urban centers through a number of projects.

• Specific Area Plans: Building Consensus for Infill Housing --by Kate White

• Infill development --a PDF report by the Greenbelt Alliance that has a Q/A and glossary about infill development.