643 Jay Street, Los Altos, CA 94022

Local realty services provided by:ERA North Orange County Real Estate
643 Jay Street,Los Altos, CA 94022
$4,995,000
Virtual Tour
  • 5 Beds
  • 3 Baths
  • 1,408 sq. ft.
  • Single family
  • Active
Upcoming open houses
  • Sun, Jan 18
    02:00 pm - 04:00 pm
Listed by: owen halliday
Office: christie's international real estate sereno
MLS#:ML82031048
Source:CRMLS

Price summary

  • Price:$4,995,000
  • Price per sq. ft.:$3,547.59

About this home

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

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Home facts

  • Year built:1950
  • Listing ID #:ML82031048
  • Added:3 day(s) ago
  • Updated:January 17, 2026 at 11:57 AM

Rooms and interior

  • Bedrooms:5
  • Total bathrooms:3
  • Full bathrooms:2
  • Half bathrooms:1
  • Living area:1,408 sq. ft.

Heating and cooling

  • Heating:Central Furnace

Structure and exterior

  • Roof:Shingle
  • Year built:1950
  • Building area:1,408 sq. ft.
  • Lot area:0.46 Acres

Schools

  • High school:Los Altos
  • Middle school:Other
  • Elementary school:Other

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$4,995,000
  • Price per sq. ft.:$3,547.59
Based on information from California Regional Multiple Listing Service, Inc. as of January 17, 2026 . This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent. The information provided is for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified.

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