According to this article in Area Development Online, developing a brownfield is a no-brainer: infrastructure is in place, governments have redevelopment funds to support it, and "the PR flip is huge."
Mark Crawford writes:
"Businesses should not underestimate the social value of developing brownfields, especially when other site selection factors are about equal for other considered properties."
Additionally, funding is available from government agencies like HUD to redevelop these underused sites, writes Crawford:
"Now millions of extra dollars are available from Housing and Urban Development (HUD) and the Environmental Protection Agency (EPA) for brownfield redevelopment through the American Recovery and Reinvestment Act (ARRA)."
Crawford hits many other reasons why brownfield development is hot.
FULL STORY: Government Funding Sweetens Site Redevelopment

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

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Caltrans
City of Fort Worth
Mpact (founded as Rail~Volution)
City of Camden Redevelopment Agency
City of Astoria
City of Portland
City of Laramie