How old are the homes in Cudjoe Key, FL?

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

12.3% (±4.0 points) of the homes in Cudjoe Key, FL were built before 1980 (2020–2024 American Community Survey).

0.4% were built before 1940.

15.0% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 12.3% (±4.0 points)
Built before 1940: 0.4%
Built 2010 or later: 15.0%

When the homes in Cudjoe Key were built

Housing units by year structure built, 2020–2024
Year built	Cudjoe Key	Monroe County	Florida	United States
2020 or later	3.0% (±1.7 points)	1.4%	3.2%	2.0%
2010 to 2019	12.0% (±5.3 points)	9.1%	11.0%	9.4%
2000 to 2009	15.2% (±4.5 points)	9.2%	18.1%	13.6%
1990 to 1999	26.1% (±6.1 points)	12.8%	14.6%	12.4%
1980 to 1989	31.4% (±7.0 points)	21.9%	19.0%	12.9%
1970 to 1979	10.3% (±3.7 points)	22.0%	15.8%	14.2%
1960 to 1969	0.9% (±1.0 points)	9.0%	8.0%	9.9%
1950 to 1959	0.3% (±0.5 points)	6.9%	6.5%	9.5%
1940 to 1949	0.4% (±0.6 points)	2.1%	1.7%	4.4%
1939 or earlier	0.4% (±0.7 points)	5.6%	1.9%	11.7%

In Cudjoe Key, the share of homes built before 1980 is lower than in Monroe County (45.6%).

It is also lower than in Florida (33.9%).

It is lower than the national figure (49.7%).

In Monroe County, Cudjoe Key ranks 12 of 12 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 730 of 857.

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 (2.0%) and the share built before 1980 (12.3%).

Homes built before 1980 in places near Cudjoe Key

Nearest places with a published estimate, compared with Cudjoe Key
Place	Distance	Homes built before 1980	Compared with this place
Cudjoe Key	—	12.3% (±4.0 points)	—
Big Pine Key	8.6 mi	24.2% (±7.1 points)	Higher
Big Coppitt Key	12 mi	29.0% (±10.1 points)	Higher
Stock Island	17 mi	50.5% (±13.2 points)	Higher
Key West	19 mi	64.5% (±4.7 points)	Higher
Marathon	30 mi	45.8% (±5.4 points)	Higher
Key Colony Beach	30 mi	39.9% (±9.7 points)	Higher
Layton	44 mi	31.9% (±36.5 points)	Not measurably different
Islamorada	64 mi	45.0% (±6.2 points)	Higher

Nearby places with a measurably higher figure: Big Pine Key, FL (24.2%), Big Coppitt Key, FL (29.0%), Stock Island, FL (50.5%).

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

Homes built before 1980 across Monroe County, place by place

Rank	Place	Homes built before 1980
6	Key Largo	41.8% (±4.9 points)
7	Key Colony Beach	39.9% (±9.7 points)
8	North Key Largo	35.1% (±13.0 points)
9	Layton	31.9% (±36.5 points)
10	Big Coppitt Key	29.0% (±10.1 points)
11	Big Pine Key	24.2% (±7.1 points)
12	Cudjoe Key	12.3% (±4.0 points)

Showing 7 of 12 places in Monroe County, ranked from highest to lowest.

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

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 Cudjoe Key

How old are most homes in Cudjoe Key?

12.3% of homes in Cudjoe Key, FL were built before 1980 (2020–2024 American Community Survey).

Do homes in Cudjoe Key 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 2.0% and 12.3% of homes in Cudjoe Key were built before then.

Does a contractor need lead certification to work on older homes in Cudjoe Key?

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 — Cudjoe Key CDP, Florida

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 Cudjoe Key CDP, Florida (place:15862, in state:12).

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.