Metro area in Pennsylvania, New Jersey, Delaware, Maryland · part of the Philadelphia-Reading-Camden, PA-NJ-DE-MD combined area
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD
The Philadelphia-Camden-Wilmington metro area authorized 12,900 new housing units in 2025, the second-largest total of the 32 metro areas based in the Middle Atlantic states. Buildings with five or more units accounted for 51% of the units authorized in 2021–2025, the highest share among the 16 metro areas based in Pennsylvania. Its busiest year since 2004 was 2021, with 36,307 units; 2025 came to 36% of that.
Single-family2–4 units5+ units
Houses or apartments
The closest match in building mix among the 386 other metro areas is Santa Rosa (50% in five-plus buildings). That share has risen sharply since 2004–2006, when it stood at 25%. Duplexes to fourplexes are unusually common here: 5.7% of units, against 3.5% nationally. Units in five-plus buildings peaked in 2021 (25,427), single-family houses in 2004 (15,504).
Busiest permit offices
Across the metro area, 331 permit offices authorized new housing in 2021–2025. The busiest was Philadelphia, with 38,671 units or 43% of the total, followed by New Castle County (unincorporated) with 4,470. Among the three largest, Philadelphia put 80% of its units in five-plus buildings, New Castle County (unincorporated) 9.3%.
Share of the units authorized in the metro area, 2021–2025.
Where in the metro
Philadelphia County accounted for 43% of the metro area's units in 2021–2025, Montgomery County for 11%. The part in Delaware, Maryland, New Jersey supplied 30%.
Relative to population
With 6,329,118 residents in July 2025, Philadelphia authorized 2.9 units per 1,000 residents a year in 2021–2025, under the national 4.7. The metro areas with the nearest rates are Lewiston, ID (2.9) and Yakima (2.9).
The wider Philadelphia-Reading-Camden region
The Census Bureau groups Philadelphia with 4 neighboring metro areas in the Philadelphia-Reading-Camden, PA-NJ-DE-MD combined area. Metro areas in it authorized 21,397 units a year in 2021–2025 (micropolitan parts not counted); Philadelphia accounted for 84%. The others, with their yearly averages: Atlantic City (1,532), Dover (1,299), Reading (442), Vineland (161).
Boom, bust and since
Its peak year is shared by 27 other metro areas, among them Dallas, Seattle, Denver. Annual permits fell from 21,010 during the mid-2000s boom to 6,979 in 2011, a drop of 67%. The nearest bust profile in the Middle Atlantic states was Williamsport's (66%). The 2021–2025 pace of 17,962 units a year is 7.8% below the 2004–2006 pace. From 2024 to 2025 the count fell 9.2%.
Similar in size
| Metro area | 2004–2025 | 2025 units | Per 1,000 a year | 5+ share |
|---|---|---|---|---|
| Atlanta-Sandy Springs-Roswell, GA | 33,670 | 6.4 | 34% | |
| Washington-Arlington-Alexandria, DC-VA-MD-WV | 17,990 | 4.0 | 53% | |
| Miami-Fort Lauderdale-West Palm Beach, FL | 23,453 | 3.4 | 67% | |
| Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | 12,900 | 2.9 | 51% | |
| Phoenix-Mesa-Chandler, AZ | 39,699 | 9.0 | 36% |
Rates and shares: 2021–2025.
Every yearly figure behind the chart, split by building size: yearly-units.csv. State view: Pennsylvania. Counting rules.