Permits through August 2026Yearly permits since 1995Alameda County index 1975–2025
Alameda County (100 = first year)United States, rebased to the same startNBER recession
House prices are indexed by county, not by city: this is Alameda County's FHFA index, with the national index rebased to the same start.
Census Bureau notes: building permit figures cover new privately owned housing units authorised by permit-issuing places; permits do not mean the units were started or completed, and places that report less often than monthly are imputed in monthly totals. FHFA notes: The FHFA HPI is a broad measure of the movement of single-family house prices. The FHFA HPI is a weighted, repeat-sales index, meaning that it measures average price changes in repeat sales or refinancings on the same properties.
Alameda County Unincorporated Area, California (Alameda County), authorised 24 housing units through building permits in the 12 months to August 2026, −41.5% on the previous 12 months.
24 of those units were single-family houses (100%), 0 were in two- to four-unit buildings and 0 in buildings of five or more units.
Since 1995 the place has authorised 6,818 units, with the busiest year 1999 (2,268 units). Alameda County's FHFA house price index rose +62.1% over the ten years to 2025.
24units permitted, 12 months to August 2026−41.5% on the previous 12 months
24single-family units100% of the total
0units in 5+ unit buildings0% of the total
—units per 1,000 residentsAlameda County 2.1 · California 2.8
Permits by month and structure type
Housing units authorised in Alameda County Unincorporated Area by month, latest 24 monthssingle-family2+ unit buildings
Units, 12 months to August 2026
Alameda County Unincorporated Area
Alameda County
California
United States
All housing units
24
3,413
111,538
1,418,086
Single-family (1 unit)
24 (100%)
1,146 (34%)
55,792 (50%)
888,241 (63%)
2 units
0
66
4,172
34,814
3–4 units
0
19
1,193
17,298
5 or more units
0 (0%)
2,182 (64%)
50,381 (45%)
477,733 (34%)
Units per 1,000 residents
—
2.1
2.8
4.1
Change on previous 12 months
−41.5%
+90.0%
+13.8%
−0.1%
Permits by year since 1995
Housing units authorised in Alameda County Unincorporated Area by year, 1995–2025single-family2+ unit buildings
6,818 units since 1995; the busiest year was 1999. Annual figures include units imputed for months a place did not report.
Home prices in Alameda County
FHFA's index for Alameda County rose +62.1% over the ten years to 2025 (+4.9% a year) and −1.9% in the latest year, against +80.3% and +0.8% for California. Full county page: decade table, peak-to-low declines, every ZIP code and every permit-issuing place in the county.
Questions and answers
How many homes are being built in Alameda County Unincorporated Area, CA?
24 housing units were authorised by building permits in the 12 months to August 2026, against 41 in the previous 12 months.
What kind of housing is being permitted in Alameda County Unincorporated Area?
24 single-family units, 0 in two-unit buildings, 0 in three- and four-unit buildings and 0 in buildings of five or more units.
How does Alameda County Unincorporated Area compare with its county and state?
No population estimate is attached to this permit-issuing area, so a per-resident rate is not shown; Alameda County runs at 2.1 units per 1,000 residents and California at 2.8.
How have home prices moved in Alameda County?
FHFA's index for Alameda County rose +62.1% over the ten years to 2025 and −1.9% in the latest year; the county page has the full series.
What does a permit count?
A housing unit authorised by a building permit for new privately owned residential construction, as reported to the Census Bureau Building Permits Survey by the permit-issuing office. Permits are not completions; some permitted units are never built, and places that report only annually are imputed in monthly figures.
Provenance
Permits: US Census Bureau, Building Permits Survey, place-level monthly and annual files through August 2026 (permit office 004000); county and state comparisons from the county and state files. Population: Census Bureau vintage 2025 estimates for incorporated places, matched on FIPS place code where the permit office is one. House price index: Federal Housing Finance Agency. Public domain. Corrections · Building Permits Survey.