643 Jay St, Los Altos, CA 94022
SOLD
FEB 17, 2026

643 Jay St
Los Altos, CA 94022

  • 5 Beds
  • 2.5 Baths
  • 1,408 sqft (on 0.46 acres)

$5,900,000

Last Sold: Feb 17, 2026
18% over list $5M
$4,190/sqft
Est. Refi. Payment $35,512/mo*
Refinance Your Home

$5,900,000

Last Sold: Feb 17, 2026
18% over list $5M
$4,190/sqft
Est. Refi. Payment $35,512/mo*
Refinance Your Home
5 Beds
2.5 Baths
1,408 sqft
(on 0.46 acres)

Local Information

Map showing home location
© Google
-- mins to
Commute Destination

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.
This property is off market, which means it's not currently listed for sale or rent on Trulia. This may be different from what's available on other websites or public sources. This description is from February 18, 2026

Home Highlights

Parking
2 Car Garage
Outdoor
Patio
A/C
Heating only
HOA
None
Price/Sqft
$4,190/sqft
Listed
149 days ago

Home Details for 643 Jay St

Interior Features

Interior Details
Number of Rooms: 2Types of Rooms: Dining Room, Family Room
Beds & Baths
Number of Bedrooms: 5Number of Bathrooms: 3Number of Bathrooms (full): 2Number of Bathrooms (half): 1
Dimensions and Layout
Living Area: 1408 Square Feet
Appliances & Utilities
Utilities: Public Utilities, Water Public
Heating & Cooling
Heating: Central Forced AirAir Conditioning: NoneHeating Fuel: Central Forced Air
Fireplace & Spa
Number of Fireplaces: 2Fireplace: Living Room, Other, Wood Burning
Gas & Electric
Gas: PublicUtilities
Windows, Doors, Floors & Walls
Flooring: Carpet, Other
Levels, Entrance, & Accessibility
Stories: 1Floors: Carpet, Other

Exterior Features

Exterior Home Features
Roof: WoodPatio / Porch: Balcony/PatioFencing: Back YardOther Structures: OtherExterior: Back Yard, FencedFoundation: Concrete Perimeter, Slab
Parking & Garage
Number of Garage Spaces: 2Number of Covered Spaces: 2No CarportHas a GarageHas an Attached GarageParking Spaces: 2Parking: Attached,Garage Door Opener
Water & Sewer
Sewer: Public Sewer
Farm & Range
Not Allowed to Raise Horses

Property Information

Year Built
Year Built: 1950
Property Type / Style
Property Type: ResidentialProperty Subtype: Single Family Residence, ResidentialArchitecture: Ranch
Building
Not a New ConstructionNot Attached Property
Property Information
Condition: FixerParcel Number: 17020056

Price & Status

Price
List Price: $4,995,000Price Per Sqft: $4,190/sqft

Active Status

MLS Status: Sold

Media

Location

Direction & Address
City: LosAltos
School Information
Elementary School: AlmondElementary_1Elementary School District: LosAltosElementaryJr High / Middle School: ArdisGEganIntermediateHigh School: LosAltosHigh_1High School District: MountainViewLosAltosUnionHighWalk Score: 34

Building

Building Area
Building Area: 1408

Lot Information

Lot Area: 0.46 acres

Listing Info

Special Conditions: Standard

Offer

Listing Agreement Type: ExclusiveRightToSell

Miscellaneous

Mls Number: ML82031048
Last check for updates: about 12 hours ago
Listed by Owen Halliday 01453658, (650) 492-0062
Christie's International Real Estate Sereno, (650) 947-2900
Bought with: Xin Jiang 01961451, (650) 283-8379, Compass, (650) 323-1111
Source: MLSListings Inc, MLS#ML82031048

Price History for 643 Jay St

DatePriceEventSource
02/17/2026$5,900,000Sold
MLSListings Inc #ML82031048
01/23/2026$4,995,000PendingMLSListings Inc #ML82031048
01/14/2026$4,995,000Listed For SaleMLSListings Inc #ML82031048

Market trends in Los Altos

Last updated May 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$4.8M
$18.33KMoM
Sale-to-List Price
103.0%
0.4%MoM
Price per sq ft
$1.84K
$145MoM
Available listings
67
8MoM
Skip to last item
  • Results are loading
Skip to first item

Property Tax and Assessment

Year2025
Tax$2,919
Assessment$142,252
Home facts updated by county records

Homeowner tools

Estimated monthly rent$7,853/mo
List your home for rent

Comparable Sales for 643 Jay St

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
648 Spargur Dr, Los Altos, CA
0.04
Single-Family Home
$6,000,000
03/04/26
4
3
2,948
83 Doud Dr, Los Altos, CA
0.31
Single-Family Home
$6,760,000
03/02/26
4
2
2,327
721 Raymundo Ave, Los Altos, CA
0.28
Single-Family Home
$5,500,000
10/09/25
3
3
2,330
145 El Monte Ct, Los Altos, CA
0.17
Single-Family Home
$4,400,000
12/09/25
3
2
1,856
667 Jay St, Los Altos, CA
0.05
Single-Family Home
$8,600,000
02/02/26
6
5.5
5,342
338 Verano Dr, Los Altos, CA
0.24
Single-Family Home
$8,701,000
06/04/26
4
3.5
3,616
663 Camellia Way, Los Altos, CA
0.37
Single-Family Home
$4,920,000
09/10/25
3
2.5
2,044

Nearby homes

Get a sense of prices in the area by checking nearby homes.
Skip to last item
Skip to first item

Assigned Schools

These are the assigned schools for 643 Jay St.
View nearby schools on GreatSchools
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

What Locals Say about Los Altos

At least 185 Trulia users voted on each feature.

  • 96 % Say it's dog friendly

  • 89 % Say parking is easy

  • 88 % Say car is needed

  • 81 % Say people would walk alone at night

  • 78 % Say it's quiet

  • 76 % Say yards are well-kept

  • 75 % Say there's holiday spirit

  • 73 % Say it's walkable to grocery stores

  • 68 % Say they plan to stay for at least 5 years

  • 64 % Say it's walkable to restaurants

  • 64 % Say kids play outside

  • 60 % Say neighbors are friendly

  • 56 % Say there's wildlife

  • 49 % Say there are community events

  • 42 % Say there are sidewalks

  • 17 % Say streets are well-lit

Sourced by Trulia users. Learn more about our methodology.
  • Jlewis0509
    "Very small town, neighborly vibes as you peruse these streets. All of the big city appeal is just minutes away "
    0
    Flag
  • Vikas Kochhar
    "You have to be mobile with your own transport. The public transport is almost non existent. Fremont ave can can be a pain at times"
    0
    Flag
  • Mwilcove
    "Green and beautiful! No street lights or sidewalks and my mailbox is down a quaint lane. Close to multiple coffe shops and grocery stores. "
    0
    Flag
  • Marianne Griffiths
    "Farmers Market Wine Festival Art Festival Holiday Lights parade Friday Night Live Music St Patrick’s Day Beer Crawl "
    1
    Flag
  • August
    "This is the ideal neighborhood that is safe, and very much like at the 1950's feel with the charm but updated wonderfully. Grew up here and still the same. Pricey but a place to call home!"
    1
    Flag
  • Reinhardt Q.
    "Great place to walk dogs - wide, lightly traveled streets. Many have no sidewalks, making lots of planting areas that make cleanup so much easier. Relatively few lawns. "
    1
    Flag
  • Shea H.
    "Great neighborhood. Lived here for 18 years. Raised 2 kids at local public schools. We can walk to downtown. "
    4
    Flag
  • Eugenetamo
    "Drive mostly in order to visit from place to place — better and arguably easier to have a car. Would say that it feels very suburban."
    1
    Flag
  • Dr. M. H. D.
    "This is a wonderful neighborhood, friendly people, but no sidewalks to walk on or street lights at night. "
    0
    Flag
  • Keshav N.
    "Summertime art and wine festival, holiday events, library, In community center contribute to the special feel of Los Altos"
    1
    Flag
  • Erica H.
    "There are many family-friendly events in Los Altos & Mountain View all year round: Rock Back the Clock, Summer Nights, etc. "
    0
    Flag
  • Dr. M. H. D.
    "Conveniently located, train station 10min drive or 25min bike ride. Close to Sunnyvale, Cupertino, and Mountain View "
    1
    Flag
  • Viviane S.
    "My neighborhood sits in an amazing community with great helpful people. The parental engagement at schools is outstanding with so many great and educated volunteers. The best place to live "
    0
    Flag
  • vs
    "Los Altos is a very engaging family oriented community. Excellent schools, fun activities for the family(movie nights in the park, Pets parade, light parade, wine and art festival with children activities, farmers market, Easter egg hunt) to just name a few! It is an amazing safe city to raise a family! "
    0
    Flag
  • Craig A.
    "The area has great schools, is very safe, and is extremely dog friendly. Neighbors care about each other."
    0
    Flag
  • CL
    "Very family friendly, lots of space for kids to play around. Great downtown, also variety of great dining options. Easy access to 101/85/237/280"
    0
    Flag
  • ROwens
    "I don’t have to commute very far since I live and work in Los Altos but there is still a lot of traffic on the street. "
    0
    Flag
  • Craig A.
    "We have regular block parties where one family provides the main entree and all others bring salads, appetizers and dessert. It’s a very connected neighborhood."
    0
    Flag
  • Deborah A.
    "I am an at home mother. Traffic not too bad most of the time except during peak school hours. I ride my bike and walk as. I h as I can but do need my car for bigger shopping trips. "
    0
    Flag
  • Isabelle J.
    "It’s a great neighborhood to walk your dog. There are few very nice parks in Los Altos, people are very friendly and accepting of dogs. Also, 10 minutes away multiple state parks as well."
    0
    Flag
  • Debs.a
    "Lots of v happy dogs and proud owners. Dog park meet ups at high school and other parks. Green space galore! "
    0
    Flag
  • Wwildanger
    "Fourth of July block parties, friendly neighbors, Art and Wine Festival, Festival of Lights Parade, First Fridays down town"
    0
    Flag
  • Maggie W.
    "Proximity! Amazing markets, close to Stanford and neighboring Mountain View and Palo Alto, and so much more! Cannot wait for a dog park in Los Altos!!"
    0
    Flag
  • Libbieb
    "There are some families with kids, but also many older families whose kids have moved out. So not as many houses celebrate Halloween, etc. "
    0
    Flag
  • Pamharris54
    "I grew up in Los Altos, it’s still a great town, but it’s definitely changed. At times, I wish the pendulum could swing back to when things weren’t so stressful!! When I grew up here, we’d play outdoors and with all our neighbors!! I hardly know our neighbors, I’ve attempted to get to know them, but they pretty much stick to themselves!! "
    0
    Flag
  • Isabelle J.
    "Lived in this neighborhood for more than 15 years. Great schools, job opportunities, beautiful area, very safe, amazing weather but also expensive! "
    0
    Flag
  • Rich
    "big yards and lots of walking trails, businesses often put out bowls of water, and random people share doggy treats"
    0
    Flag
  • Andy J.
    "it's green, quiet and cosy enough to escape and enjoy the best of California has to offer from weather, "
    0
    Flag
  • Isabelle J.
    "I am originally from Paris and have lived in this neighborhood for 17 years. My family and I love it. Now that the kids are going to college we thought of leaving the area because it’s quite expensive but it is also very safe, the weather is amazing and the community is very nice. Plus there’re lots of natural preserves and the sea close by as well as everything you need in the towns and city. Business is booming in the Silicon Valley... makes it tough to leave!"
    0
    Flag
  • Karina S.
    "Well established area with awesome neighbors, and perfect combination of modern and historic architecture. "
    0
    Flag
  • Neil S.
    "Quite, peaceful,friendly and safe. Location is in ideal climate zone. Freeway accessibility and foremost outstanding eateries."
    0
    Flag
  • Cjsaaj
    "It’s a very quiet safe neighborhood. We are close to the walking trails. The school district is amazing!"
    1
    Flag

LGBTQ Local Legal Protections

Apartments for Rent

Skip to last item
Skip to first item

Explore by feature - Garage

Explore by feature - Air Conditioning

Explore by feature - Pool

Explore by feature - Washer/dryer

Explore by feature - Outdoor Space

Homes for sale near 643 Jay St

Skip to last item
Skip to first item

Off Market Homes Near 643 Jay St

Skip to last item
Skip to first item
Based on information from the MLSListings MLS as of 2026-06-11 15:45:07 PDT. 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.
643 Jay St, Los Altos, CA 94022 is a 5 bedroom, 3 bathroom, 1,408 sqft single-family home built in 1950. This property is not currently available for sale. 643 Jay St was last sold on Feb 17, 2026 for $5,900,000 (18% higher than the asking price of $4,995,000). The current Trulia Estimate for 643 Jay St is $5,908,100.