Housing % of Units Built Since 2010, by Zip Code (ZCTA5) — Philadelphia Metro

NOTE: Gray indicates insufficient data or a suppressed estimate.

Newer housing construction concentrates most heavily in the outer suburban ring, particularly in southern Chester County and select areas northwest of Norristown, where several zip codes exceed 12–20% of units built since 2010. The urban core of Philadelphia and adjacent inner-ring communities like Camden and Chester display notably low construction rates, generally below 4%, reflecting already-dense built environments with limited greenfield development. A striking outlier appears in a small zip code northwest of Norristown approaching 30%, likely representing a targeted large-scale residential development, while the eastern portions of the metro near Trenton show a patchwork of moderate and low construction activity.

Data: U.S. Census Bureau, 2023 ACS

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