How old are the homes in Key Largo, FL?

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

41.8% (±4.9 points) of the homes in Key Largo, FL were built before 1980 (2020–2024 American Community Survey).

0.2% were built before 1940.

12.7% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 41.8% (±4.9 points)
Built before 1940: 0.2%
Built 2010 or later: 12.7%

When the homes in Key Largo were built

Housing units by year structure built, 2020–2024
Year built	Key Largo	Monroe County	Florida	United States
2020 or later	2.2% (±1.7 points)	1.4%	3.2%	2.0%
2010 to 2019	10.5% (±2.8 points)	9.1%	11.0%	9.4%
2000 to 2009	6.7% (±2.2 points)	9.2%	18.1%	13.6%
1990 to 1999	12.0% (±3.0 points)	12.8%	14.6%	12.4%
1980 to 1989	26.7% (±3.6 points)	21.9%	19.0%	12.9%
1970 to 1979	29.0% (±4.0 points)	22.0%	15.8%	14.2%
1960 to 1969	6.7% (±2.1 points)	9.0%	8.0%	9.9%
1950 to 1959	5.8% (±1.9 points)	6.9%	6.5%	9.5%
1940 to 1949	0.1% (±0.2 points)	2.1%	1.7%	4.4%
1939 or earlier	0.2% (±0.4 points)	5.6%	1.9%	11.7%

In Key Largo, the share of homes built before 1980 is not measurably different from Monroe County (45.6%).

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

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

In Monroe County, Key Largo ranks 6 of 12 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 395 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 (12.8%) and the share built before 1980 (41.8%).

Homes built before 1980 in places near Key Largo

Nearest places with a published estimate, compared with Key Largo
Place	Distance	Homes built before 1980	Compared with this place
Key Largo	—	41.8% (±4.9 points)	—
Tavernier	8.6 mi	46.2% (±12.8 points)	Not measurably different
North Key Largo	11 mi	35.1% (±13.0 points)	Not measurably different
Islamorada	13 mi	45.0% (±6.2 points)	Not measurably different
Florida City	22 mi	30.0% (±6.5 points)	Lower
Homestead	24 mi	21.8% (±3.1 points)	Lower
Homestead Base	26 mi	19.1% (±34.6 points)	Not measurably different
Leisure City	26 mi	49.4% (±5.9 points)	Not measurably different
Naranja	27 mi	10.8% (±4.2 points)	Lower

Nearby places with a measurably lower figure: Florida City, FL (30.0%), Homestead, FL (21.8%), Naranja, FL (10.8%).

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
1	Key West	64.5% (±4.7 points)
2	Stock Island	50.5% (±13.2 points)
3	Tavernier	46.2% (±12.8 points)
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)

Key Largo 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 Key Largo

How old are most homes in Key Largo?

41.8% of homes in Key Largo, FL were built before 1980 (2020–2024 American Community Survey).

Do homes in Key Largo 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 12.8% and 41.8% of homes in Key Largo were built before then.

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

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 — Key Largo 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 Key Largo CDP, Florida (place:36375, 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.