94509 (Antioch) housing market data
The median home in ZIP 94509 in Antioch sold for $527,345 in the three months to September 2026, +1.4% on a year earlier. 133 homes sold, taking a median 22 days, at 102.4% of list price on average. The Contra Costa County median was $778,258.
Most homes sell near or above asking within a month, so buyers have little room to negotiate and sellers can hold firm on price.
102.4% of list price on average · 59% sold above asking · 22 days on market · 2.4 months of supply, ZIP 94509 in Antioch. How we decide
94509 home prices
Among the 34 Contra Costa County ZIP codes with at least 10 sales, 94509 has the 33rd highest median price and the 10th fastest sales.
How fast homes sell in 94509
Buyers and sellers in 94509
| Sold above list price | 59.9% |
|---|---|
| Went under contract within two weeks | 36.8% |
| New listings in three months | 157 |
| Homes for sale | 102 |
| Months of supply | 2.4 |
94509 prices by property type
| Type | Median price | 1 year | Days on market | Sold |
|---|---|---|---|---|
| Single Family | $544,863 | +1.5% | 18 | 109 |
| Condo/Co-op | $141,496 | −20.3% | 34 | 8 |
| Townhouse | $378,251 | −1.8% | 46 | 10 |
| Multi-Family (2-4 Unit) | $880,000 | +10.7% | 25 | 5 |
What it costs to buy in 94509
At the median price and this week's average 30-year rate, a buyer putting 20% down pays about $3,315 a month in principal, interest and base property tax, before insurance, HOA dues and any special taxes. Lenders commonly cap housing costs at 28% of gross income, which points to a household income of about $142,051. That is 1.6 times the median household income of $86,196. The Census puts the median rent at $2,062 a month, so owning the median home costs about $1,253 a month more than renting, before tax deductions and equity.
| Median sale price | $527,345 |
|---|---|
| 20% down payment | $105,469 |
| Principal and interest, 30-year fixed at 7.24% | $2,875 a month |
| Property tax at the 1% Prop 13 base | $439 a month |
| Household income needed (28% guideline) | $142,051 a year |
| Median household income here (Census) | $86,196 a year |
| Median gross rent here (Census) | $2,062 a month |
Who lives in 94509
| Population | 70,090 |
|---|---|
| Median household income | $86,196 |
| Median home value (owners' estimate) | $584,100 |
| Median gross rent | $2,062 a month |
| Homes owner-occupied | 58.0% |
| Housing units | 24,390 |
Nearby ZIP codes
| ZIP | Area | Median price | 1 year | Days on market |
|---|---|---|---|---|
| 94531 | Antioch | $666,804 | −1.7% | 35 |
| 94507 | Alamo | $3,199,060 | +30.6% | 24 |
| 94506 | Danville | $2,199,354 | −4.8% | 28 |
| 94513 | Brentwood | $744,781 | −3.9% | 37 |
| 94505 | Discovery Bay | $745,171 | −5.2% | 46 |
| 94517 | Clayton | $1,129,168 | +7.5% | 21 |
| 94518 | Concord | $795,266 | −6.4% | 26 |
| 94519 | Concord | $699,794 | −5.4% | 23 |
Every metric for 94509, month by month
| Three months to | Median price | 1 year | $/sq ft | Sold | New listings | Days on market | Sale-to-list |
|---|---|---|---|---|---|---|---|
| September 2026 | $527,345 | +1.4% | $344 | 133 | 157 | 22 | 102.4% |
| August 2026 | $540,000 | +0.2% | $341 | 143 | 159 | 18 | 102.5% |
| July 2026 | $550,000 | +0.6% | $346 | 141 | 179 | 16 | 102.0% |
| June 2026 | $549,500 | +0.0% | $350 | 131 | 178 | 17 | 101.2% |
| May 2026 | $542,500 | −1.2% | $344 | 118 | 170 | 19 | 100.5% |
| April 2026 | $535,000 | −2.2% | $348 | 107 | 160 | 24 | 100.4% |
| March 2026 | $525,000 | +0.0% | $343 | 103 | 139 | 29 | 100.1% |
| February 2026 | $525,000 | +1.0% | $343 | 101 | 123 | 40 | 100.4% |
| January 2026 | $524,250 | +0.8% | $349 | 92 | 98 | 42 | 99.8% |
| December 2025 | $529,000 | +1.7% | $330 | 102 | 99 | 41 | 99.9% |
| November 2025 | $510,000 | −1.7% | $329 | 115 | 119 | 38 | 99.8% |
| October 2025 | $515,000 | −2.8% | $329 | 136 | 148 | 38 | 100.3% |
| September 2025 | $520,000 | −4.2% | $342 | 145 | 157 | 27 | 100.9% |
Taxes and costs
Property tax, transfer tax, Mello-Roos and insurance work the same across Contra Costa County; see the county page for the rules.
94509 housing market,
answered.
What is the median home price in 94509?+
$527,345 for homes sold in the three months to September 2026 (Redfin), −32.2% against the Contra Costa County median.
Are home prices going up in 94509?+
The three-month median is +1.4% on a year earlier. With 133 sales in the period, a few unusual sales can move a ZIP median, so read it alongside the county trend.
How fast do homes sell in 94509?+
A median 22 days from listing to accepted offer, against 28 across Contra Costa County.
What area is ZIP 94509?+
ZIP 94509 is in Antioch, Contra Costa County, California.
How this data works
Redfin Data Center figures from the Redfin Data Center. ZIP figures are rolling three-month periods; Redfin uses them because single months in one ZIP are too few sales to be reliable. The area name is from Zillow's ZIP data. The compilation is ours.