PoliticsAugust 15, 2026

infill

IN-fil

Definition

The development or use of vacant or underutilized land within an existing urban area, typically to increase density or housing.

Etymology

Derived from the prefix 'in-' (into) and the verb 'fill.' It emerged in urban planning and architecture in the mid-20th century to describe the process of filling gaps in a city's built environment.

In the news

The article uses the term to suggest that using vacant land for new construction is a key strategy for reversing wealth loss and building housing in Chicago neighborhoods.

Districtwide CPS support needed for the arts — not just at one high school

Read the full article ↗

Chicago Sun-Times

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