643 Jay Street, LOS ALTOS, CA 94022 (MLS # ML82031048)
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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.
| LAST UPDATED | 1/13/2026 | YEAR BUILT | 1950 |
|---|---|---|---|
| GARAGE SPACES | 2.0 | COUNTY | Santa Clara |
| STATUS | Active | PROPERTY TYPE(S) | Single Family |
| Elementary School | Almond Elementary |
|---|---|
| Jr. High School | Ardis G. Egan Intermediate |
| High School | Los Altos High |
| ADDITIONAL DETAILS | |
| AIR | None |
|---|---|
| EXTERIOR | Balcony |
| FIREPLACE | Yes |
| GARAGE | Attached Garage, Yes |
| HEAT | Central, Forced Air |
| LOT | 0 |
| LOT DESCRIPTION | Back Yard, Level |
| LOT DIMENSIONS | 19900.00 |
| PARKING | Attached, Garage Door Opener |
| POOL DESCRIPTION | None |
| SEWER | Public Sewer |
| STORIES | 1 |
| STYLE | Ranch |
| WATER | Public |
| ZONING | R1 |
The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the MLSListings™ MLS system. All real estate listings in the MLSListings MLS system are marked with the MLSListings Internet Data Exchange icon (a stylized house inside a circle), and detailed information about them includes the names of the listing brokers and listing agents.
Based on information from MLSListings MLS as of 1/14/26 7:18 AM PST. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
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This IDX solution is (c) Diverse Solutions 2026.
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