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Alameda County, California

Single-family vs. condo trends, market pressure signals, and 5-year price history. Source: Redfin.

Median Sale Price
$1,225,000
+11.4% YoY
Active Inventory
2,171
Days on Market
17 days
Price Drops
25.8%

Single-Family vs. Condo

Source: Redfin (property-type breakdown)
Single-Family Median
$1,390,000
+3.9% YoY
Condo / Co-op Median
$580,000
-0.4% YoY
SFR vs. Condo YoY Gap
+4.3%
SFR outperforming condos
DOM: SFR vs. Condo
14d / 35d
SFR / Condo

Buyer vs. Seller Market Indicators

Latest month — Redfin
Months of Supply
2.3 mo
Seller market

Inventory ÷ monthly sales. Below 3 = strong seller market; 3-6 balanced; above 6 = buyer market.

Sale-to-List Ratio
108.4%
Bidding-war territory

Median closing price ÷ original list price. Above 100% = homes routinely closing above asking.

% Sold Above List
64%
Highly competitive

Share of closed sales priced above asking. The single cleanest read on bidder competition.

What does your sqft target cost in Alameda County, California?

$689/sqft median (Redfin)
+$0 adj
+$0 adj
optional
Estimated price
$1,377,382
Above median (+12% vs median)
Region median
$1,225,000
all homes
Price-tier reverse lookup — what sqft does each price band buy?
$600,000
≈ 871 sqft
$1,200,000
≈ 1,742 sqft
$2,000,000
≈ 2,904 sqft
$5,000,000
≈ 7,260 sqft

Estimate = (median $/sqft × your sqft) + bed/bath/lot adjustments. Bed and bath adjustments use Appraisal Institute / Fannie Mae standard rules of thumb (~$15K/extra bedroom, ~$20K/extra bathroom vs. a 3bd/2ba baseline; half-bath = half adj). Lot premium is a $1.50/sqft heuristic beyond a 6,000 sqft baseline — accuracy varies sharply by urban infill vs. acreage market. Quality, condition, year built, and HOA are not modeled here. For a deeper county-level hedonic AVM, see AVM Lite.

Rent + invest vs. buy + own — backtested

15-yr rolling history · S&P 500
Property type:
Upfront capital committed (both paths): $282K = 20% down + 3% closing on a $1.23M home
BUY + OWN
Median ending wealth $1.08M $657K real
Net gain on $282K upfront: $794K
Range: $1.08M → $1.08M
Wealth = home value (appreciated at 3%/yr) − remaining mortgage − 6% selling cost. Gain = wealth − upfront. Leveraged appreciation on full $1.23M asset comes from the 20% down.
RENT + INVEST
Median ending portfolio $3.36M $2.24M real
Net gain on $1.26M contributed: $2.09M
Range: $1.59M → $8.32M
Same upfront cash + each year's (own − rent) surplus invested in S&P 500 at actual annual returns. Median renter contributed $1.26M total.
Median wealth delta: $2.28M in favor of RENT + INVEST
What if you'd started in a recent year? (most-recent 15yr window: 2011–2025)
WindowBuy wealthBuy gainRent wealthRent gainWealth delta
2011–2025$1.08M$794K$4.84M$3.58M$3.76M rent
2010–2024$1.08M$794K$4.94M$3.67M$3.86M rent
2009–2023$1.08M$794K$4.69M$3.42M$3.61M rent
2008–2022$1.08M$794K$3.44M$2.18M$2.37M rent
2007–2021$1.08M$794K$4.47M$3.21M$3.40M rent
2006–2020$1.08M$794K$3.81M$2.55M$2.74M rent
2005–2019$1.08M$794K$3.44M$2.18M$2.36M rent
2004–2018$1.08M$794K$2.83M$1.57M$1.76M rent

Educational tool, not investment or real-estate advice. Past performance does not guarantee future results. Backtests use actual annual total returns including dividends from S&P 500 (Damodaran (NYU Stern) annual total return (with dividends), 1957-present.).

Buyer model: 30-yr fixed mortgage, P&I + property tax + insurance + maintenance (1% of value/yr) + HOA. Selling cost = 6%. Investor model: down payment + annual cashflow surplus invested in the chosen index at that calendar year's actual return.

Tax model: pre-tax comparison. Toggle "after-tax mode" to apply MID, SALT, LTCG, and the Sec 121 capital-gains exclusion.

This calculator does not adjust for: PMI (assumed 20%+ down), differential transaction costs by state, lifestyle factors (commute, schools, kids), illiquidity / forced-sale risk, or insurance availability constraints (e.g., FL/CA wildfire). Consult a fiduciary advisor and tax professional before acting on any of this.

Market Pressure Signals

Derived from Redfin trend
Inventory vs. Long-Term Avg
+35.9%
surplus — buyer leverage
DOM vs. 24-Mo Avg
-20.5%
currently 17 days
Long-Term Avg Inventory
1,598
Long-Term Avg DOM
21 days

Mortgage & Price Stress

State HPI + national delinquency
State HPI YoY
+1.8%
flat — pressure building
State HPI vs. Peak
0.0%
at or near peak peak 2026-01-01
National Mortgage Delinquency
1.89%
benchmark — 2026-01-01 county-grain delinquency requires paid data

State-grain HPI YoY + drawdown from peak is the cleanest free price-stress proxy. The national delinquency rate gives the macro mortgage-stress backdrop. True county-level mortgage delinquency lives in paid datasets (MBA NDS, CoreLogic LP).

Value Ratios

Median home price ÷ county median income
Value / Income
9.7×
severely overvalued
Median Household Income
$126,240
Census ACS B19013

Historically affordable markets sit at 3–4× income; over 5× is stretched, over 6× is severely overvalued. Lower ratios point to bargain opportunities.

Housing Stock & Owners

Census ACS 5-year (B19013, B01003, B25002, B25003, B25034, B25007)
Population
1,651,949
total residents
Total Housing Units
630,726
all units, occupied + vacant
Vacancy Rate
6.0%
tight
Homeownership Rate
54.1%
of occupied units owner-occupied
Boomer Owners (65+)
16.1%
of homeowner households
Millennial / Gen-X Owners (35-54)
4.1%
of homeowner households
Pre-1949 Housing Stock
26.0%
structures built before 1949

When boomer-owner share is high, expect more inventory hitting the market over the next decade as homes transition. High vacancy + high old-stock often signals deferred-maintenance markets where buyers can negotiate.

Net Migration (IRS Tax Returns)

IRS Statistics of Income — Migration Data
Net Migration
-15,760
losing people (2022–2023)
Inbound Returns
37,170
56,413 people moved in
Outbound Returns
44,228
72,173 people moved out
Net Returns
-7,058
household-filer basis

Top 5 Origins (where movers came from)

  1. Santa Clara, California — 6,578 returns
  2. Contra Costa, California — 4,871 returns
  3. San Francisco, California — 3,938 returns
  4. San Mateo, California — 2,498 returns
  5. Los Angeles, California — 2,023 returns

Top 5 Destinations (where movers went)

  1. Contra Costa, California — 7,141 returns
  2. Santa Clara, California — 4,634 returns
  3. San Francisco, California — 3,459 returns
  4. San Joaquin, California — 3,092 returns
  5. Los Angeles, California — 2,118 returns

IRS Statistics of Income tracks county-to-county migration via tax-return change-of-address. Net migration uses the exemption count (a proxy for people, including dependents). True net flow can lag by 1–2 years vs. real-time movements.

Who's Moving In (Census ACS)

Source: Census ACS B07001 (5-year)
Inbound Movers (1 yr)
98,826
6.04% of pop. — moved here from outside the county
From Other States
21,290
1.3% of pop. — interstate inbound
From Abroad
17,725
moved into the county from outside the U.S.
Same House 1 Year Ago
88%
stable residents

Census ACS asks where people lived 1 year ago, so this counts inbound movers but does not show outbound — true net migration would require IRS SOI parsing.

Trends

Up to 5 years of monthly data

Median Sale Price

Trailing 12 months

Active Inventory

Trailing 12 months

Days on Market

Trailing 12 months

Looking for state-level data? See California statewide stats →

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