How old are the homes in Simi Valley, CA?

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

49.8% (±2.4 points) of the homes in Simi Valley, CA were built before 1980 (2020–2024 American Community Survey).

0.8% were built before 1940.

4.9% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 49.8% (±2.4 points)
Built before 1940: 0.8%
Built 2010 or later: 4.9%

When the homes in Simi Valley were built

Housing units by year structure built, 2020–2024
Year built	Simi Valley	Ventura County	California	United States
2020 or later	0.9% (±0.3 points)	1.0%	1.3%	2.0%
2010 to 2019	4.0% (±0.8 points)	5.2%	6.5%	9.4%
2000 to 2009	11.0% (±1.3 points)	10.8%	11.2%	13.6%
1990 to 1999	11.3% (±1.3 points)	9.9%	10.1%	12.4%
1980 to 1989	23.2% (±1.6 points)	17.7%	14.9%	12.9%
1970 to 1979	19.9% (±1.8 points)	22.7%	16.8%	14.2%
1960 to 1969	24.9% (±1.4 points)	18.2%	12.5%	9.9%
1950 to 1959	3.5% (±0.7 points)	8.5%	12.4%	9.5%
1940 to 1949	0.7% (±0.3 points)	2.6%	5.4%	4.4%
1939 or earlier	0.8% (±0.3 points)	3.4%	8.9%	11.7%

In Simi Valley, the share of homes built before 1980 is lower than in Ventura County (55.4%).

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

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

In Ventura County, Simi Valley ranks 17 of 24 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 639 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 (29.9%) and the share built before 1980 (49.8%).

Homes built before 1980 in places near Simi Valley

Nearest places with a published estimate, compared with Simi Valley
Place	Distance	Homes built before 1980	Compared with this place
Simi Valley	—	49.8% (±2.4 points)	—
Santa Susana	4.8 mi	51.4% (±22.2 points)	Not measurably different
Bell Canyon	5.3 mi	39.6% (±16.2 points)	Not measurably different
Oak Park	5.8 mi	31.5% (±5.0 points)	Lower
Moorpark	7.5 mi	20.3% (±2.9 points)	Lower
Agoura Hills	8.2 mi	53.3% (±5.7 points)	Not measurably different
Hidden Hills	8.7 mi	63.3% (±13.9 points)	Not measurably different
Thousand Oaks	8.8 mi	56.5% (±2.5 points)	Higher
Santa Rosa Valley	8.9 mi	16.1% (±7.8 points)	Lower

Nearby places with a measurably lower figure: Oak Park, CA (31.5%), Moorpark, CA (20.3%), Santa Rosa Valley, CA (16.1%).

Nearby places with a measurably higher figure: Thousand Oaks, CA (56.5%).

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

Homes built before 1980 across Ventura County, place by place

Rank	Place	Homes built before 1980
11	San Buenaventura (Ventura)	63.1% (±2.8 points)
12	Oxnard	57.2% (±2.1 points)
13	Somis	57.0% (±19.6 points)
14	Thousand Oaks	56.5% (±2.5 points)
15	Fillmore	54.2% (±10.1 points)
16	Santa Susana	51.4% (±22.2 points)
17	Simi Valley	49.8% (±2.4 points)
18	Camarillo	45.3% (±2.4 points)
19	Bell Canyon	39.6% (±16.2 points)
20	Oak Park	31.5% (±5.0 points)
21	Piru	26.5% (±11.0 points)
22	Moorpark	20.3% (±2.9 points)
23	Santa Rosa Valley	16.1% (±7.8 points)

Showing 13 of 24 places in Ventura County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

What you can do on Seayora in Simi Valley

One account for renting, owning, managing and fixing homes, with these figures beside you.

Do repairs, renovations or maintenance?

Get found by owners and renters near Simi Valley, and send estimates and invoices from your phone.

Join as a pro · Find a pro

Own or manage a rental?

List it, sign the lease and collect rent online, with the figures for Simi Valley beside you.

Create a landlord account · See what landlords get

Looking for a place to rent?

Browse homes for rent near Simi Valley, save the ones you like and apply online.

Browse rentals · Create a renter account

Questions about Simi Valley

How old are most homes in Simi Valley?

49.8% of homes in Simi Valley, CA were built before 1980 (2020–2024 American Community Survey).

Do homes in Simi Valley 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 29.9% and 49.8% of homes in Simi Valley were built before then.

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

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 — Simi Valley city, 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 Simi Valley city, California (place:72016, 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.