How old are the homes in King of Prussia, PA?

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

53.0% (±4.1 points) of the homes in King of Prussia, PA were built before 1980 (2020–2024 American Community Survey).

2.9% were built before 1940.

23.7% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 53.0% (±4.1 points)
Built before 1940: 2.9%
Built 2010 or later: 23.7%

When the homes in King of Prussia were built

Housing units by year structure built, 2020–2024
Year built	King of Prussia	Montgomery County	Pennsylvania	United States
2020 or later	3.3% (±1.4 points)	1.5%	1.0%	2.0%
2010 to 2019	20.4% (±2.1 points)	6.6%	5.1%	9.4%
2000 to 2009	6.8% (±1.6 points)	8.6%	8.1%	13.6%
1990 to 1999	5.3% (±1.6 points)	10.8%	8.9%	12.4%
1980 to 1989	11.3% (±2.7 points)	11.4%	9.6%	12.9%
1970 to 1979	16.2% (±2.5 points)	12.1%	12.4%	14.2%
1960 to 1969	15.6% (±1.9 points)	11.7%	9.9%	9.9%
1950 to 1959	16.4% (±1.7 points)	15.9%	13.0%	9.5%
1940 to 1949	1.9% (±1.2 points)	5.4%	7.0%	4.4%
1939 or earlier	2.9% (±1.5 points)	16.0%	25.0%	11.7%

In King of Prussia, the share of homes built before 1980 is lower than in Montgomery County (61.1%).

It is also lower than in Pennsylvania (67.3%).

It is not measurably different from the national figure (49.7%).

In Montgomery County, King of Prussia ranks 28 of 43 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 248 of 391.

Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.

Why the age of a home matters: lead-based paint

Federal law treats housing built before 1978 as likely to contain lead-based paint.

Before a lease or sale of most pre-1978 housing, the landlord or seller must disclose any known lead-based paint and hazards and give the tenant or buyer the EPA pamphlet (42 U.S.C. § 4852d; 40 CFR part 745, subpart F; 24 CFR part 35, subpart A).

A contractor paid to renovate, repair or paint a pre-1978 home must be a certified firm, use a certified renovator and follow lead-safe work practices under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E) whenever the job disturbs more than 6 square feet of painted surface in a room or more than 20 square feet outside; window replacement and demolition always count (40 CFR 745.83).

Certification comes from EPA, or from the state where EPA has authorized the state to run the program.

The Census Bureau groups construction by decade, so the share built before 1978 lies between the share built before 1970 (36.8%) and the share built before 1980 (53.0%).

Homes built before 1980 in places near King of Prussia

Nearest places with a published estimate, compared with King of Prussia
Place	Distance	Homes built before 1980	Compared with this place
King of Prussia	—	53.0% (±4.1 points)	—
Bridgeport	2.0 mi	78.7% (±17.9 points)	Higher
West Norriton Township	2.4 mi	52.4% (±7.1 points)	Not measurably different
Swedeland	2.5 mi	49.4% (±16.7 points)	Not measurably different
Norristown	2.7 mi	80.8% (±6.7 points)	Higher
Audubon	3.5 mi	49.9% (±7.9 points)	Not measurably different
West Conshohocken	3.6 mi	62.7% (±9.7 points)	Not measurably different
Trooper	3.8 mi	67.9% (±14.2 points)	Higher
Wayne	4.0 mi	78.7% (±13.0 points)	Higher

Nearby places with a measurably higher figure: Bridgeport, PA (78.7%), Norristown, PA (80.8%), Trooper, PA (67.9%).

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

Homes built before 1980 across Montgomery County, place by place

Rank	Place	Homes built before 1980
22	Pottsgrove	71.1% (±13.6 points)
23 (tie)	Fort Washington	68.5% (±9.7 points)
23 (tie)	McKinley	68.5% (±18.4 points)
25	Trooper	67.9% (±14.2 points)
26	Horsham	60.2% (±7.9 points)
27	Plymouth Meeting	56.7% (±7.1 points)
28	King of Prussia	53.0% (±4.1 points)
29 (tie)	Evansburg	50.9% (±18.4 points)
29 (tie)	Woxall	50.9% (±16.6 points)
31	Audubon	49.9% (±7.9 points)
32	Swedeland	49.4% (±16.7 points)
33	Gilbertsville	45.0% (±8.8 points)
34	Spring House	43.6% (±11.1 points)

Showing 13 of 43 places in Montgomery County, ranked from highest to lowest.

King of Prussia is a census-designated place: an unincorporated community the Census Bureau draws for statistics, with no municipal government of its own.

It lies inside Upper Merion Township, whose figures include it.

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 King of Prussia

How old are most homes in King of Prussia?

53.0% of homes in King of Prussia, PA were built before 1980 (2020–2024 American Community Survey).

Do homes in King of Prussia need a lead paint disclosure?

A home built before 1978 does, before it is rented or sold, unless an exemption applies (42 U.S.C. § 4852d); between 36.8% and 53.0% of homes in King of Prussia were built before then.

Does a contractor need lead certification to work on older homes in King of Prussia?

Yes, when the job disturbs more than 6 square feet of paint in a room or 20 square feet outside, or replaces a window: the firm must be certified and a certified renovator must direct the work under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E).

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — King of Prussia CDP, 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 King of Prussia CDP, Pennsylvania (place:39736, 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_0017PE, DP04_0017PM, DP04_0018PE, DP04_0018PM, DP04_0019PE, DP04_0019PM, DP04_0020PE, DP04_0020PM, DP04_0021PE, DP04_0021PM, DP04_0022PE, DP04_0022PM, DP04_0023PE, DP04_0023PM, DP04_0024PE, DP04_0024PM, DP04_0025PE, DP04_0025PM, DP04_0026PE, DP04_0026PM

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.