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$5,900,000
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Property Description
First time on the market in more than 50 years. An exceptional land-value opportunity in one of Los Altos most coveted neighborhoods. Set on an impressive 19,900 (appr.) SF parcel, this tranquil property offers a rare canvas for builders, investors, or visionary buyers seeking to create a custom estate in a truly special location. The existing residence consists of a 3-bedroom, 1.5-bath main home, complemented by an independent in-law unit with 2 bedrooms, a full bath, a generous living area, and a kitchenette - for a total of 5 bedrooms, 2 full and 1 half baths. While the structures are ready for transformation, the true value lies in the expansive lot, tranquil setting, and exceptional location. The oversized grounds present abundant possibilities for new construction, thoughtful expansion, or a complete reimagining of the property, subject to buyer verification. Mature surroundings and a spacious footprint provide the ideal foundation for a future luxury residence with ample outdoor living. Just minutes from top-rated Los Altos schools (Almond Elementary, Egan Middle, and Los Altos High), downtown shops and dining, parks, and major Silicon Valley commute routes, this is a rare opportunity to secure a large parcel in a premier location and bring a bold vision to life.
Full Property Details
Full Property Details for 643 Jay St
General
- Sold For: $5,900,000
- Status: Closed
- Type: Single Family
- Source: RE_Infolink
- MLS ID: ML82031048
- Added to Site: 63 day(s) ago
Interior
- Fireplace(s): Living Room, Wood-Burning, Other
- Flooring: Carpet, Other
Rooms
Bathrooms
- Total Bathrooms: 3
- Full Bathrooms: 2
- Half Bathrooms: 1
Bedrooms
- Total Bedrooms: 5
Other Rooms
- Family Room: Separate Family Room
Additional Information
- Extras: Not Applicable
Parking
- Garage Spaces: 2
- Parking Features: Attached Garage, Gate / Door Opener
Location
- Area: North Los Altos
- County: Santa Clara
- Cross Streets: N. Clark Ave
Heating & Cooling
- Cooling Type: None
- Heating Type: Central Air (Forced Air)
Utilities
- Sewer: Public Sewer
- Water: Public
- Utility Description: Public Utilities
Structural Information
- Architectural Style: Ranch
- Construction: Detached
- Foundation: Concrete Perimeter, Concrete Slab
- Roof: Wood Shakes / Shingles
- Square Feet: 1,408
- Year Built: 1950
Lot Features
- Minimum Lot Size: 19900
- Lot Size (Sq. Ft.): 19,900
- Grounds/Landscape: Back Yard, Balcony / Patio, Fenced
- Zoning: R1
- Lot Description: Level
- Fencing (Description): Fenced Back
Listed by Christie's International Real Estate Sereno, Owen Halliday
Sold by Apr, Xin Jiang
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Schools
Schools serving 643 Jay St
School Districts:Mountain View-los Altos Union School District, Los Altos Elementary School District
| Name | Grades | Distance |
|---|---|---|
Almond Elementary School 550 Almond Avenue, Los Altos, CA 94022 | K-6 | 0.2 mi |
Ardis G. Egan Junior High School 100 West Portola Avenue, Los Altos, CA 94022 | 7-8 | 1.3 mi |
Los Altos High School 201 Almond Avenue, Los Altos, CA 94022 | 9-12 | 0.6 mi |
Disclaimer:
School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 643 Jay St
Date
Details
Price
Change
Source
2/17/2026
Sold
$5,900,000
18.12%
MLS
1/13/2026
Listed
$4,995,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
643 Jay St, Los Altos, CA 94022 (MLS# ML82031048) is a Single Family property that was sold at $5,900,000 on February 17, 2026. Want to learn more about 643 Jay St? Do you have questions about finding other Single Family real estate for sale in Los Altos? You can browse all Los Altos real estate or contact a Coldwell Banker agent to request more information.

