Castro Valley, Unknown County
Greenridge-306 is a residential community in Castro Valley, Unknown County, offering residents an exceptional living experience. With 1 active listing averaging $2.10M, this community provides a blend of comfort, convenience, and quality lifestyle amenities in one of Southern California's most desirable locations.
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Whether you're looking to buy or sell in this exclusive community, Joey Sardella has the local expertise to guide you through every step of the process.
Community specialist • Professional marketing • Expert negotiation
HOA dues, assessments and community rules change. Verify with the association before relying on any figure here.
The median home in Greenridge-306 sold for $1.9M over the past 12 months, up 24.6% from the year before.
There is 1 home for sale right now, asking a median of $1.57M — about $685 per square foot.
Homes here take a median of 58 days to sell and close at 94.7% of asking price.
At 3 sales over the past year, current inventory represents about 4.0 months of supply — a balanced market by the usual six-month benchmark.
Market data derived from MLS records, updated October 15, 2026. Figures cover single-family and attached residential sales and exclude rentals and land.