South of 580, Castro Valley Housing Market · 2026

Data through Sep 2026

Data curated by Melanie Tan, 8 Blocks Real Estate · How this data works

South of 580, Castro Valley Market Snapshot

South of 580 is a balanced market, but competition has been picking up. Here's where things stand:

Based on 7 homes sold in the 3 months ending September 2026. Includes all residential types (SFH, condo, townhouse, multi-family, and others). Enough to see the trend, but individual sales still move the median. Updated weekly.

Data through September 2026

SalesWhat are homes selling for?
Median Sale Price
$850K
▲ Up 1.9% from September 2025
Up $16K from September 2025
Homes Sold
7
Sold in the last 3 months. More sales = more reliable data.
Your CostWhat would you actually pay each month?
Monthly Payment
~$5,775/mo
7.4% · 30yr fixed · 20% down
Payment Breakdown
  • Principal & Interest$4,707
  • Property Tax$885
  • Insurance$183
CompetitionHow competitive is it right now?
Days on Market
29 days
▼ 16 fewer days than in September 2025
Homes typically sell within a month
Sale-to-List Ratio
100.9%
▲ Up from 96.5% in September 2025
Selling at or near asking price
% Sold Over Asking
71%
71% of homes sold above their asking price
Active Listings
7
▲ Up 49.4% from September 2025
About 3.2 months of supply. Moderate selection available

Market Trends

See how prices, monthly costs, and mortgage rates have moved in South of 580.

Median Sale Price
Up 1.9% year-over-year in South of 580. Based on 7 sales in the last 3 months.
Homes Sold
42% fewer homes sold than a year ago in South of 580.
Total Monthly Payment
Estimated monthly cost is up 8% from a year ago in South of 580, reflecting changes in both price and mortgage rates.

Includes principal, interest, estimated CA property tax (~1.25%), and estimated insurance (~$2,200/yr). HOA fees not included.

30-Year Fixed Mortgage Rate (National Avg.)
National average currently at 7.4%. Your actual rate depends on your credit, down payment, and loan type.

Frequently asked questions about South of 580, Castro Valley

Is now a good time to buy in South of 580, Castro Valley?

South of 580, Castro Valley is balanced but competition is picking up. It remains a reasonable environment for buyers, though acting decisively on well-priced homes is becoming more important.

How do South of 580, Castro Valley home prices compare to the Bay Area average?

At $850K, South of 580, Castro Valley's median sits about 52% below the Bay Area average of $1.77M. South of 580, Castro Valley is among the most accessible parts of the Bay Area.

Within Castro Valley, this area trades about 25% below the city-wide median of $1.14M.

How competitive is South of 580, Castro Valley for buyers?

South of 580, Castro Valley is a balanced market where neither side dominates:

  • Homes sell about 0.9% above asking on average
  • 71% close above list price
  • 29 days typical time to go pending
  • 25% of listings have had a price reduction

Buyer strategy: contingencies are more accepted, and there is time to tour and negotiate without extreme pressure.

What will my total monthly cost be on a median-priced South of 580, Castro Valley home?

At $850K with 20% down at 7.4%, your estimated total monthly cost is approximately $5,775:

  • $4,707 principal and interest
  • $885 property tax (California 1.25% effective rate)
  • $183 homeowners insurance

HOA fees are extra.

No noise, just a quick weekly read on what's going on in your market.

Melanie Tan
Melanie Tan
DRE #02250755
“I help Bay Area buyers and sellers make confident moves with the latest market data, real local expertise, and the patience to find what's actually right for you, not the fastest close.”
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