How old are the homes in Kentfield, CA?

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

89.6% (±9.9 points) of the homes in Kentfield, CA were built before 1980 (2020–2024 American Community Survey).

12.2% were built before 1940.

2.3% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 89.6% (±9.9 points)
Built before 1940: 12.2%
Built 2010 or later: 2.3%

When the homes in Kentfield were built

Housing units by year structure built, 2020–2024
Year built	Kentfield	Marin County	California	United States
2020 or later	0.3% (±0.4 points)	0.3%	1.3%	2.0%
2010 to 2019	2.0% (±1.7 points)	2.6%	6.5%	9.4%
2000 to 2009	2.4% (±1.5 points)	5.2%	11.2%	13.6%
1990 to 1999	3.5% (±2.0 points)	7.0%	10.1%	12.4%
1980 to 1989	2.3% (±1.5 points)	10.1%	14.9%	12.9%
1970 to 1979	11.3% (±4.1 points)	19.0%	16.8%	14.2%
1960 to 1969	14.6% (±4.2 points)	18.7%	12.5%	9.9%
1950 to 1959	34.3% (±4.6 points)	18.3%	12.4%	9.5%
1940 to 1949	17.2% (±4.5 points)	6.2%	5.4%	4.4%
1939 or earlier	12.2% (±4.7 points)	12.6%	8.9%	11.7%

In Kentfield, the share of homes built before 1980 is higher than in Marin County (74.8%).

It is also higher than in California (56.0%).

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

In Marin County, Kentfield ranks 4 of 24 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 37 of 1,076.

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 (78.3%) and the share built before 1980 (89.6%).

Homes built before 1980 in places near Kentfield

Nearest places with a published estimate, compared with Kentfield
Place	Distance	Homes built before 1980	Compared with this place
Kentfield	—	89.6% (±9.9 points)	—
Larkspur	1.6 mi	73.1% (±6.8 points)	Lower
Ross	1.9 mi	83.2% (±12.4 points)	Not measurably different
Mill Valley	2.1 mi	79.8% (±8.3 points)	Not measurably different
Corte Madera	2.8 mi	76.3% (±10.6 points)	Not measurably different
Alto	3.0 mi	69.8% (±31.9 points)	Not measurably different
San Anselmo	3.3 mi	86.3% (±8.4 points)	Not measurably different
Tamalpais-Homestead Valley	4.1 mi	80.2% (±7.7 points)	Not measurably different
Strawberry	4.1 mi	75.9% (±11.8 points)	Not measurably different

Nearby places with a measurably lower figure: Larkspur, CA (73.1%).

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

Homes built before 1980 across Marin County, place by place

Rank	Place	Homes built before 1980
1	Woodacre	95.5% (±26.1 points)
2 (tie)	Lucas Valley-Marinwood	90.0% (±12.3 points)
2 (tie)	Santa Venetia	90.0% (±16.2 points)
4	Kentfield	89.6% (±9.9 points)
5	Fairfax	87.8% (±11.6 points)
6	Sleepy Hollow	86.5% (±18.0 points)
7	San Anselmo	86.3% (±8.4 points)
8	Sausalito	85.2% (±8.6 points)
9	Ross	83.2% (±12.4 points)
10	Belvedere	81.7% (±11.9 points)

Showing 10 of 24 places in Marin County, ranked from highest to lowest.

Kentfield 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 Kentfield

How old are most homes in Kentfield?

89.6% of homes in Kentfield, CA were built before 1980 (2020–2024 American Community Survey).

Do homes in Kentfield 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 78.3% and 89.6% of homes in Kentfield were built before then.

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

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 — Kentfield CDP, California

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 Kentfield CDP, California (place:38114, in state:06).

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.