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3879 Blackstone Ct
Castro Valley, CA 94542 · Alameda County · Parcel 417-284-20
Know something the records don't?
Records miss most of what makes a country property. Check what it has, and the estimate updates.
Boxes already checked come from this home's last MLS listing. Uncheck anything that's changed.
In the 94542 zip code, country homes sold for a median of $1,680,000 over the last two years (15 sales).
Recent sales like it
From MLS and county records: the closest matches by acreage and house size in the last two years. Street addresses are left off.
| Area | Land | House | Beds / baths | Sold | Price | Source |
|---|---|---|---|---|---|---|
| Hayward 94542 | 1.07 ac | 3,701 sq ft | 5 bd / 3 ba | Nov 2024 | $2,135,000 | MLS |
| Livermore 94550 | 1.25 ac | 3,728 sq ft | 4 bd / 3 ba | Jul 2025 | $3,410,000 | MLS |
| Pleasanton 94566 | 1.13 ac | 3,840 sq ft | 5 bd / 3 ba | Oct 2025 | $2,200,000 | MLS |
| Hayward 94541 | 1.14 ac | 3,767 sq ft | 6 bd / 5 ba | Sep 2025 | $2,700,000 | MLS |
| Pleasanton 94566 | 1.25 ac | 3,581 sq ft | 4 bd / 3 ba | Apr 2026 | $3,335,000 | MLS |
More country homes near Castro Valley
- 26233 Clover RdHayward · 1.3 ac · $1.68M estimate
- 26027 Clover RdFairview · 1.3 ac · $1.21M estimate
- 27590 Vista Bahia WayHayward · 1.13 ac · $2.23M estimate
- 25774 Clover RdHayward · 1.1 ac · $1.2M estimate
- 4164 Oak Pointe Ct.Hayward · 1.1 ac · $1.84M estimate
- 4084 Oak Pointe CtHayward · 1.39 ac · $1.78M estimate
What a computer can't see
- Condition. A remodeled kitchen and a 1970s one look the same in county records.
- Usable land. Five flat, fenced acres and five steep ones are not the same five acres.
- Water. Well output, irrigation rights and water district access move price on land.
- Outbuildings. Barns, shops and second units are often missing from the county file.
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