Area data
Antioch, CA — ZIP 94509
Population: 70,090 (Census ACS)
The median home value in ZIP 94509 (Antioch, CA) is $540,040 — down 2.7% over the past year. Homes sell for a median $555,000 after a median 17 days on market. Typical rent runs $2,153/month. 18 schools serve the area (NCES). FEMA's National Risk Index rates the county's overall natural-hazard risk Very High, with inlandflooding, drought, earthquake the top-rated hazards. Cost of living is 13.3% above the US average (BEA, metro/state-level).
$540,040
Median home value
-2.7%
1-year change
17
Median days on market
Very High
Hazard risk (county)
Home values & appreciation
- Median home value
- $540,040
- 1-year appreciation
- -2.7%
- 3-year appreciation
- -5.0%
- 5-year appreciation
- -2.4%
- 10-year appreciation
- +60.8%
- All-time peak (2022-06)
- $622,361
- House Price Index (state)
- 417.4 (-0.8% YoY)
Sources: home value index (ZIP-level) · FHFA House Price Index (state-level)
Market activity
- Median sale price
- $555,000
- Median list price
- $539,950
- Median price per sqft
- $367
- 1-year sale-price change
- -1.8%
- Median days on market
- 17 days
- Homes sold (recent period)
- 104
- For-sale inventory
- 142
- Sale-to-list ratio
- 100.7%
- Active listings
- 59
- 1-year forecast
- -1.1%
- Days to pending
- 28 days
- New listings (monthly)
- 55
Source: recent area sales and market data (ZIP-level)
Rents
- Typical rent
- $2,153/mo
- 1-year rent change
- +1.5%
- Studio fair-market rent
- $1,495/mo
- 1BR fair-market rent
- $1,869/mo
- 2BR fair-market rent
- $2,330/mo
- 3BR fair-market rent
- $3,029/mo
- 4BR fair-market rent
- $3,495/mo
Sources: market rent index (ZIP-level) · HUD Fair Market Rents (metro/county-level, 40th-percentile regulatory reference)
Affordability
- Cost of living index (High)
- 113.3 (100 = US avg)
- Electricity rate (state-level)
- 32.5¢/kWh
- Natural gas rate (state-level)
- $22.00/MCF
- 30-year mortgage rate (national)
- 6.66%
- 15-year mortgage rate (national)
- 6.00%
Sources: BEA Regional Price Parities (metro/state-level) · EIA energy rates (state-level) · Freddie Mac PMMS (national)
Schools
- Total schools
- 18
- Elementary schools
- 11
- Middle schools
- 2
- High schools
- 3
- Charter schools
- 3
- School districts serving the area
- Antioch Charter Academy II District, Antioch Charter Academy District, Rocketship Delta Prep District
- Schools include
- Antioch Charter Academy II, Antioch Charter Academy, Rocketship Delta Prep, Antioch High, Antioch Middle
Source: NCES school directory, 2022-23 (school-address-based)
Natural hazards & flood risk
- Overall hazard risk (county)
- Very High
- Top hazards (county)
- inlandFlooding, drought, earthquake, heatWave, landslide
- Notable hazard ratings (county)
- coastalFlooding: Relatively Moderate · drought: Relatively High · earthquake: Relatively High · heatWave: Relatively High · inlandFlooding: Very High · landslide: Relatively High
- FEMA flood zone
- AE
- Flood risk level
- High
- Wildfire risk to homes (county)
- Higher than 92% of US counties
- Buildings in wildfire direct-exposure zone
- 13.9%
- Radon potential (county)
- Moderate radon potential — EPA Zone 2 of 3
- EPA Superfund (NPL) sites within 5 mi
- None
- Nearest Superfund site
- Concord Naval Weapons Station (10.9 mi)
Sources: FEMA National Risk Index (county-level) · FEMA flood data (ZIP-level) · USDA Forest Service Wildfire Risk to Communities (county-level) · EPA radon zones + Superfund NPL
Climate (30-year normals)
- Average annual temperature
- 63.0°F
- Average high
- 75.0°F
- Average low
- 51.0°F
- Annual precipitation
- 12.9 in
- USDA plant hardiness zone
- 9b (extreme annual low 25 to 30°F)
Sources: NOAA Climate Normals (30-year, nearest-station) · USDA Plant Hardiness Zone Map (2023)
Air quality
- Air quality rating
- Moderate
- Median AQI (annual)
- 51
- Days with Good air quality
- 173
- Days with Moderate air quality
- 190
- Highest AQI recorded (year)
- 110
Source: EPA air quality data (nearest monitoring station, annual)
Walkability & transit
- Walkability index
- 8.2 / 20
- Transit service frequency
- -99,999
- Jobs reachable by car (30 min)
- 36,079
- Jobs reachable by transit (45 min)
- 53,274
Source: EPA Smart Location Database (metropolitan block groups)
Amenities
- National parks within ~60 mi
- 11
- Nearest national park
- Port Chicago Naval Magazine National Memorial (13 mi)
- National parks include
- Port Chicago Naval Magazine National Memorial, Eugene O'Neill National Historic Site, John Muir National Historic Site
- Airports within 30 mi
- 21
- Nearest airport
- Funny Farm Airport (10 mi)
- Nearest major airport
- Buchanan Field (CCR) (13 mi)
- Hospitals nearby (~15 mi)
- 1
- Hospitals include
- SUTTER DELTA MEDICAL CENTER
- Avg hospital rating (CMS)
- 3.0 / 5
- Best hospital rating nearby (CMS)
- 3.0 / 5
- Solar radiation rating
- Good (5.1 kWh/m²/day)
Sources: National Park Service · FAA airport data · CMS hospital data · DOE/NREL (proximity-based)
Migration
- Net migration (county)
- -5,001 tax filers
Source: IRS county-to-county migration data (county-level, ~12-month lag)
Housing stock
- Median year housing built
- 1,975
- Housing built before 1970
- 35.2%
- Housing built 2000 or later
- 10.8%
- Median annual property tax
- $3,992
- Mean commute to work
- 37 min
- Households with broadband internet
- 77.3%
Source: Census ACS 5-year estimates (ZIP-level)
Employment & development
- Total county employment
- 322,307
- Average weekly wage
- $1,600
- Top industries (by employment)
- Health Care, Accommodation & Food, Construction
- Annual residential building permits (county)
- 1,199
Sources: BLS QCEW (county-level) · Census Building Permits (county-level)
How it compares
| ZIP 94509 | State median | US median | |
|---|---|---|---|
| Median home value | $540,040 | $702,573 | $289,727 |
| Median sale price | $555,000 | $696,000 | $325,000 |
| Median days on market | 17 days | 39 days | 51 days |
| Typical rent | $2,153/mo | $2,767/mo | $1,808/mo |
| Median annual property tax | $3,992 | $4,533 | $2,006 |
State and US medians are computed across all US ZIP codes with sufficient public-data coverage, from the same sources as the figures above.
Area data compiled from public government, academic, and industry research feeds. Data sources →
Common questions
- What is the median home value in ZIP 94509?
- $540,040.
- What is the median sale price in ZIP 94509?
- $555,000.
- How long do homes take to sell in ZIP 94509?
- Median days on market: 17 days.
- What is typical rent in ZIP 94509?
- Typical rent: $2,153/month.
- What is the natural-hazard risk in ZIP 94509?
- Overall risk: Very High (FEMA NRI, county-level). Top hazards: inlandFlooding, drought, earthquake, heatWave, landslide.
- Is ZIP 94509 in a flood zone?
- High (FEMA NFIP). FEMA flood zone AE.
- What is the wildfire risk in ZIP 94509?
- Risk to homes is higher than 92% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
- What is the radon potential in ZIP 94509?
- Moderate radon potential — EPA Zone 2 of 3, county-level. EPA recommends testing every home regardless of zone.
- Are there Superfund sites near ZIP 94509?
- No current or proposed National Priorities List sites within 5 miles (EPA).
- How many schools serve ZIP 94509?
- 18 schools (11 elementary, 2 middle, 3 high) (NCES, 2022-23).
- Is ZIP 94509 walkable?
- Walkability index: 8.2/20 (EPA Smart Location Database).
- What is the air quality in ZIP 94509?
- Moderate. Median AQI: 51. (EPA AQI).
- What is the cost of living in ZIP 94509?
- Regional Price Parity: 113.3 (100 = US average) (High) (BEA RPP, metro/state-level).
Nearby ZIP codes
Selling a home in Antioch, CA?
REAIGENT7 gives every listing its own AI assistant grounded in this same public data — it answers buyer questions about the home and the area, around the clock, and sends every lead to the listing agent. Agents: it installs on your listing page, your website, or WordPress.
Data last updated
Most recent source refresh: Sep 2026. See all data sources →