How old are the homes in Big Coppitt Key, FL?

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

29.0% (±10.1 points) of the homes in Big Coppitt Key, FL were built before 1980 (2020–2024 American Community Survey).

0.6% were built before 1940.

14.3% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 29.0% (±10.1 points)
Built before 1940: 0.6%
Built 2010 or later: 14.3%

When the homes in Big Coppitt Key were built

Housing units by year structure built, 2020–2024
Year built	Big Coppitt Key	Monroe County	Florida	United States
2020 or later	0.1% (±0.5 points)	1.4%	3.2%	2.0%
2010 to 2019	14.2% (±6.9 points)	9.1%	11.0%	9.4%
2000 to 2009	18.8% (±9.3 points)	9.2%	18.1%	13.6%
1990 to 1999	11.4% (±6.4 points)	12.8%	14.6%	12.4%
1980 to 1989	26.5% (±9.3 points)	21.9%	19.0%	12.9%
1970 to 1979	16.5% (±7.6 points)	22.0%	15.8%	14.2%
1960 to 1969	9.3% (±5.2 points)	9.0%	8.0%	9.9%
1950 to 1959	2.6% (±2.5 points)	6.9%	6.5%	9.5%
1940 to 1949	0.0% (±3.2 points)	2.1%	1.7%	4.4%
1939 or earlier	0.6% (±1.1 points)	5.6%	1.9%	11.7%

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

It is not measurably different from Florida (33.9%).

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

In Monroe County, Big Coppitt Key ranks 10 of 12 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 549 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 (12.5%) and the share built before 1980 (29.0%).

Homes built before 1980 in places near Big Coppitt Key

Nearest places with a published estimate, compared with Big Coppitt Key
Place	Distance	Homes built before 1980	Compared with this place
Big Coppitt Key	—	29.0% (±10.1 points)	—
Stock Island	5.6 mi	50.5% (±13.2 points)	Higher
Key West	7.8 mi	64.5% (±4.7 points)	Higher
Cudjoe Key	12 mi	12.3% (±4.0 points)	Lower
Big Pine Key	20 mi	24.2% (±7.1 points)	Not measurably different
Marathon	41 mi	45.8% (±5.4 points)	Higher
Key Colony Beach	41 mi	39.9% (±9.7 points)	Not measurably different
Layton	55 mi	31.9% (±36.5 points)	Not measurably different
Islamorada	75 mi	45.0% (±6.2 points)	Higher

Nearby places with a measurably lower figure: Cudjoe Key, FL (12.3%).

Nearby places with a measurably higher figure: Stock Island, FL (50.5%), Key West, FL (64.5%), Marathon, FL (45.8%).

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
4	Marathon	45.8% (±5.4 points)
5	Islamorada	45.0% (±6.2 points)
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 9 of 12 places in Monroe County, ranked from highest to lowest.

Big Coppitt 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 Big Coppitt Key

How old are most homes in Big Coppitt Key?

29.0% of homes in Big Coppitt Key, FL were built before 1980 (2020–2024 American Community Survey).

Do homes in Big Coppitt 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 12.5% and 29.0% of homes in Big Coppitt Key were built before then.

Does a contractor need lead certification to work on older homes in Big Coppitt 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 — Big Coppitt 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 Big Coppitt Key CDP, Florida (place:06350, 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.