South of 580, Castro Valley Housing Market · 2026

Data through Mar 2026

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 9 homes sold in March 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 March 2026

SalesWhat are homes selling for?
Median Sale Price
$800K
Down 30.0% from March 2025
Down $343K from March 2025
Homes Sold
9
Sold in the most recent month. More sales = more reliable data.
Your CostWhat would you actually pay each month?
Monthly Payment
~$5,075/mo
6.53% · 30yr fixed · 20% down
Payment Breakdown
  • Principal & Interest$4,058
  • Property Tax$833
  • Insurance$183
CompetitionHow competitive is it right now?
Days on Market
13 days
22 fewer days than in March 2025
Homes sell in a week or two
Sale-to-List Ratio
100.5%
Up from 100.4% in March 2025
Selling at or near asking price
% Sold Over Asking
56%
More than half of homes sold above their asking price
Active Listings
3
Down 50.0% from March 2025
About 0.3 months of supply. Very low, limited options for buyers

Market Trends

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

Median Sale Price
Down 30.0% year-over-year in South of 580. Based on 9 sales in the most recent month.
Homes Sold
13% more homes sold than a year ago in South of 580.
Total Monthly Payment
Estimated monthly cost is down 31% 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 6.53%. 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 $800K, South of 580, Castro Valley's median sits about 57% below the Bay Area average of $1.88M. South of 580, Castro Valley is among the most accessible parts of the Bay Area.

Within Castro Valley, this area trades about 26% below the city-wide median of $1.08M.

By home type:

  • Single-family homes at $825K
  • Condos at $475K
  • Townhomes at $615K
What price range should I budget for in South of 580, Castro Valley?

Prices in South of 580, Castro Valley depend heavily on home type and specific neighborhood. Median sale prices by type:

  • Single-family homes at $825K
  • Condos at $475K
  • Townhomes at $615K

Individual listings vary widely based on location, size, and condition. The best calibration is to narrow to a few specific neighborhoods you are considering and look at recent sales there.

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 0.5% above asking on average
  • 56% close above list price
  • 13 days typical time to go pending

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 $800K with 20% down at 6.53%, your estimated total monthly cost is approximately $5,075:

  • $4,058 principal and interest
  • $833 property tax (California 1.25% effective rate)
  • $183 homeowners insurance

HOA fees are extra. Condo buyers typically budget an additional $300 to $700 per month for HOA, and townhome HOAs run $200 to $500.

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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