What kinds of homes are in Castle Shannon, PA?

Name: Types of homes in Castle Shannon, PA, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Castle Shannon, PA has 4,087 (±278) homes (2020–2024 American Community Survey).

That is about 2,558 homes per square mile of land.

56.5% are detached single-family houses.

12.8% are in buildings of two to four units.

23.6% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 4,087 (±278)
Detached houses: 56.5%
2–4 unit buildings: 12.8%
5+ unit buildings: 23.6%

Homes in Castle Shannon by building size

Housing units by units in structure, 2020–2024
Building type	Castle Shannon	Allegheny County	Pennsylvania	United States
Single-family, detached	56.5% (±4.9 points)	61.6%	56.6%	61.3%
Single-family, attached (townhouse, rowhouse)	7.1% (±2.8 points)	10.3%	18.8%	6.2%
2 units	4.1% (±2.4 points)	4.6%	4.3%	3.4%
3 or 4 units	8.7% (±3.7 points)	4.2%	4.0%	4.3%
5 to 9 units	5.2% (±3.4 points)	4.0%	3.1%	4.5%
10 to 19 units	4.8% (±2.8 points)	3.9%	2.6%	4.3%
20 or more units	13.6% (±4.4 points)	10.6%	7.0%	10.3%
Mobile home	0.0% (±0.8 points)	0.7%	3.5%	5.6%
Boat, RV, van, etc.	0.0% (±0.8 points)	0.0%	0.0%	0.1%

In Castle Shannon, the share of homes in buildings of five or more units is not measurably different from Allegheny County (18.5%).

It is also higher than in Pennsylvania (12.7%).

It is not measurably different from the national figure (19.1%).

Homes in buildings of 5 or more units in places near Castle Shannon

Nearest places with a published estimate, compared with Castle Shannon
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Castle Shannon	—	23.6% (±6.2 points)	—
Baldwin Township	1.0 mi	0.0% (±6.2 points)	Lower
Whitehall	1.6 mi	20.4% (±4.4 points)	Not measurably different
Mount Lebanon Township	1.7 mi	22.1% (±2.4 points)	Not measurably different
Dormont	2.1 mi	13.7% (±4.0 points)	Lower
Brentwood	2.3 mi	15.6% (±7.8 points)	Not measurably different
Bethel Park	3.1 mi	19.5% (±2.6 points)	Not measurably different
Scott Township (Allegheny County)	3.5 mi	31.9% (±5.4 points)	Higher
Mount Oliver	3.6 mi	4.7% (±5.5 points)	Lower

Nearby places with a measurably lower figure: Baldwin Township, PA (0.0%), Dormont, PA (13.7%), Mount Oliver, PA (4.7%).

Nearby places with a measurably higher figure: Scott Township (Allegheny County), PA (31.9%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Homes in buildings of 5 or more units across Allegheny County, place by place

Rank	Place	Homes in buildings of 5 or more units
13	Robinson Township (Allegheny County)	25.8% (±5.1 points)
14	Sewickley	25.6% (±6.6 points)
15	Monroeville	25.1% (±3.2 points)
16	Homestead	24.7% (±7.7 points)
17	Emsworth	24.5% (±7.2 points)
18 (tie)	Braddock Hills	23.6% (±6.6 points)
18 (tie)	Castle Shannon	23.6% (±6.2 points)
20	McCandless Township	23.2% (±3.6 points)
21	Ross Township (Allegheny County)	23.0% (±3.0 points)
22 (tie)	Carnegie	22.1% (±4.5 points)
22 (tie)	Mount Lebanon Township	22.1% (±2.4 points)
22 (tie)	North Versailles Township	22.1% (±5.8 points)
25	Coraopolis	21.0% (±5.7 points)

Showing 13 of 128 places in Allegheny County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

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Questions about Castle Shannon

How many homes are in Castle Shannon?

Castle Shannon, PA has an estimated 4,087 (±278) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Castle Shannon houses or apartments?

56.5% are detached houses and 7.1% attached houses, while 36.4% are in buildings of two or more units.

How many two-family and small multifamily homes are in Castle Shannon?

12.8% of homes in Castle Shannon are in buildings of two to four units, the small rental buildings that are often owner-occupied.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Castle Shannon borough, Pennsylvania

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Castle Shannon borough, Pennsylvania (place:11680, in state:42).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The API needs a free key.

Request a Census API key.

DP04_0001E, DP04_0001M, DP04_0007PE, DP04_0007PM, DP04_0008PE, DP04_0008PM, DP04_0009PE, DP04_0009PM, DP04_0010PE, DP04_0010PM, DP04_0011PE, DP04_0011PM, DP04_0012PE, DP04_0012PM, DP04_0013PE, DP04_0013PM, DP04_0014PE, DP04_0014PM, DP04_0015PE, DP04_0015PM

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.