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

NOTE: Gray indicates insufficient data or a suppressed estimate.

Zip codes in the central Maryland corridor—particularly in Howard County and parts of Frederick and Charles counties—display notably higher shares of post-2010 housing construction, with several areas exceeding 20%, reflecting sustained suburban and exurban development pressure between Washington, D.C., and Baltimore. The Eastern Shore and western Appalachian panhandle regions are predominantly shaded in darker tones, indicating minimal new housing activity and largely static housing stocks. A striking patchwork pattern around the Baltimore–Washington metropolitan core reveals sharp contrasts between adjacent zip codes, suggesting that new construction is highly localized and likely driven by specific planned developments or rezoning decisions rather than broad regional trends.

Data: U.S. Census Bureau, 2023 ACS

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