643 Jay Street Los Altos, CA 94022
MLS LogoListed by MLSlistings Inc. / Los Altos Office / Owen Halliday - Contact:  650-492-0062

  643 Jay Street Los Altos, CA 94022

Active (5 Days)
$4,995,000 (USD)
5
BED
3
BATH
1,408
SQFT
OPEN HOUSE TIMES
  • OPEN
    Sun, Jan 18
    2:00 pm - 4:00 pm

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.

MLS #:
ML82031048
Lot Size
0.46 acres
Type
Single-Family Home
Year Built
1950
Style
Ranch
School District
460
County
Santa Clara County

Listed By

Owen Halliday, DRE #01453658, Los Altos Office, Contact: 650-492-0062
Source
MLSlistings Inc.
Last checked Jan 18 2026 at 3:18 AM GMT+0000
Bathroom Details
  • Full Bathrooms: 2
  • Half Bathroom: 1
Lot Information
  • Grade - Level
Property Features
  • Fenced
  • Back Yard
  • Balcony / Patio
  • Fireplace: Living Room
  • Fireplace: Wood Burning
  • Fireplace: Other
  • Foundation: Concrete Perimeter
  • Foundation: Concrete Slab
Heating and Cooling
  • Central Forced Air
  • None
Flooring
  • Carpet
  • Other
Exterior Features
  • Roof: Wood Shakes / Shingles
Utility Information
  • Utilities: Water - Public, Public Utilities
  • Sewer: Sewer - Public
School Information
  • Elementary School: Almond Elementary
  • Middle School: Ardis G. Egan Intermediate
  • High School: Los Altos High
Garage
  • Attached Garage
  • Gate / Door Opener
Stories
  • 1
Living Area
  • 1,408 sqft
Additional Information: Los Altos | 650-492-0062
Location
   
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