Denise Welsh
Compass
(628) 250-2411
24 Total Sales
1 in South Los Altos
$3,750,000 Price
999 Andover Way Los Altos, CA 94024
South Los Altos NeighborhoodEstimated Value: $4,266,974 - $4,742,000
4
Beds
3
Baths
2,037
Sq Ft
$2,240/Sq Ft
Est. Value
Highlights
- In Ground Pool
- Wolf Appliances
- Wood Flooring
- Montclaire Elementary School Rated A
- Vaulted Ceiling
- Mud Room
About This Home
As of April 2026Extensively reimagined and updated, this residence earns a 2025 effective age from the county assessor. The oversized 12,650 sq. ft. lot and expansive front yard offers expansion opportunities. A straightforward value-add could include building a new two-car garage while converting the existing garage and laundry room into premium living. Experience the pinnacle of Los Altos luxury with breathtaking views and an east-facing orientation bathed in natural light. Just steps from Rancho San Antonio trails, this sanctuary offers a seamless indoor-outdoor lifestyle. The culinary kitchen is a masterpiece featuring a stunning waterfall island, Wolf, Sub-Zero, and Cove appliances and huge wine cellar. Architectural elegance shines through soaring vaulted and coffered ceilings, European Oak engineered hardwood flooring, and Restoration Hardware lighting. Bathrooms are curated with Porcelanosa tile and Hansgrohe fixtures. Living spaces flow through a massive bi-fold door to an entertainers paradise with a fully equipped outdoor kitchen, gazebo, and designer landscaping. Smart home features include automated blinds, Milgard windows, owned solar, and a Tesla charger. Major systems including plumbing and sewer, roof, and HVAC have been replaced, with the electrical system extensively upgraded.
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Home Details
Home Type
- Single Family
Year Built
- Built in 1962
Lot Details
- Security Fence
- Irrigation
- Zoning described as R110
Parking
- 2 Car Attached Garage
- Electric Vehicle Home Charger
Home Design
- Slab Foundation
- Shingle Roof
Interior Spaces
- 2,037 Sq Ft Home
- 1-Story Property
- Entertainment System
- Vaulted Ceiling
- Skylights in Kitchen
- Circular Fireplace
- Mud Room
- Family Room with Fireplace
- Combination Dining and Living Room
- Wood Flooring
- Crawl Space
- Laundry Room
Kitchen
- Open to Family Room
- Microwave
- Ice Maker
- Dishwasher
- Wine Refrigerator
- Wolf Appliances
- Kitchen Island
- Quartz Countertops
Bedrooms and Bathrooms
- 4 Bedrooms
- Walk-In Closet
- 3 Full Bathrooms
Home Security
- Security Lights
- Monitored
Pool
- In Ground Pool
Utilities
- Forced Air Heating and Cooling System
- Separate Meters
- Individual Gas Meter
Listing and Financial Details
- Assessor Parcel Number 342-11-081
Ownership History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
Date
Name
Owned For
Owner Type
Purchase Details
Listed on
Mar 19, 2026
Closed on
Apr 27, 2026
Sold by
Shun Ye and Yilin Yu
Bought by
Seller's Agent
Yilin Yu
Beyond Mortgage Co
Buyer's Agent
Tim XU
eXp Realty of California Inc.
List Price
$4,498,000
Sold Price
$4,780,000
Premium/Discount to List
$282,000
6.27%
Views
42
Current Estimated Value
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Estimated Appreciation
-$160,004
Avg. Annual Appreciation
-12.07%
Original Mortgage
$3,585,000
Outstanding Balance
$3,577,482
Interest Rate
5.74%
Mortgage Type
New Conventional
Estimated Equity
$986,262
Purchase Details
Closed on
Feb 20, 2025
Sold by
Yu Yilin
Bought by
Ye Shun and Yu Yilin
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$1,700,000
Interest Rate
6.88%
Mortgage Type
New Conventional
Purchase Details
Listed on
Nov 3, 2024
Closed on
Nov 7, 2024
Sold by
Ye Shun
Bought by
Yu Yilin
Seller's Agent
Ulli Rieckmann-Fechner
Coldwell Banker Realty
Buyer's Agent
Jia Shi
Coldwell Banker Realty
List Price
$2,988,000
Sold Price
$3,400,000
Premium/Discount to List
$412,000
13.79%
Views
19
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
17.56%
Original Mortgage
$2,720,000
Interest Rate
6.08%
Mortgage Type
Construction
Purchase Details
Listed on
Nov 3, 2024
Closed on
Oct 31, 2024
Sold by
Janszen Trust and Janszen Norman R
Bought by
Yu Yilin
Seller's Agent
Ulli Rieckmann-Fechner
Coldwell Banker Realty
Buyer's Agent
Jia Shi
Coldwell Banker Realty
List Price
$2,988,000
Sold Price
$3,400,000
Premium/Discount to List
$412,000
13.79%
Views
19
Home Financials for this Owner
Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$2,720,000
Interest Rate
6.08%
Mortgage Type
Construction
Purchase Details
Closed on
Apr 15, 1995
Sold by
Janszen Kurt and Janszen Marina E
Bought by
Janszen Kurt and Janszen Marina E
Home Values in the Area
Average Home Value in this Area
Agents Specializing in South Los Altos, CA
-
Denise Welsh
-
Ayelet Gingold
Ayelet Gingold
Agam Real Estate
(669) 202-4727
92 Total Sales
1 in South Los Altos
$4,550,000 Price
-
Vickie Burgess
Vickie Burgess
Realsmart Properties
(650) 744-3694
114 Total Sales
1 in South Los Altos
$6,250,000 Price
-
Jalayne Forrester
Jalayne Forrester
KW Bay Area Estates
(669) 356-8887
56 Total Sales
1 in South Los Altos
$2,551,000 Price
-
Lynn North
Lynn North
The Agency
(650) 747-8423
44 Total Sales
5 in South Los Altos
$3.1M - $4.5M Price Range
-
Lindsay Mandjek
Lindsay Mandjek
Corcoran Icon Properties
(925) 471-8024
110 Total Sales
1 in South Los Altos
$3,100,000 Price
Purchase History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Buyer | Sale Price | Title Company |
|---|---|---|---|
| $4,780,000 | Cornerstone Title Company | ||
| Ye Shun | -- | Orange Coast Title | |
| Yu Yilin | -- | Cornerstone Title Company | |
| Yu Yilin | $3,400,000 | Cornerstone Title Company | |
| Janszen Kurt | -- | -- |
Source: Public Records
Mortgage History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Status | Borrower | Loan Amount |
|---|---|---|---|
| Open | $3,585,000 | ||
| Previous Owner | Ye Shun | $1,350,000 | |
| Previous Owner | Ye Shun | $1,000,000 | |
| Closed | Ye Shun | $1,700,000 | |
| Previous Owner | Yu Yilin | $2,720,000 |
Source: Public Records
Property History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Event | Price | List to Sale | Price per Sq Ft | Prior Sale |
|---|---|---|---|---|---|
| 04/30/2026 04/30/26 | Sold | $4,780,000 | +6.3% | $2,347 / Sq Ft | |
| 04/14/2026 04/14/26 | Pending | -- | -- | -- | |
| 03/19/2026 03/19/26 | For Sale | $4,498,000 | +32.3% | $2,208 / Sq Ft | |
| 11/12/2024 11/12/24 | Sold | $3,400,000 | +13.8% | $1,669 / Sq Ft | View Prior Sale |
| 11/03/2024 11/03/24 | Pending | -- | -- | -- | |
| 11/03/2024 11/03/24 | For Sale | $2,988,000 | -- | $1,467 / Sq Ft |
Source: MLSListings
Tax History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2026 | $40,534 | $4,811,258 | $3,417,000 | $1,394,258 |
| 2025 | $40,534 | $3,400,000 | $3,350,000 | $50,000 |
| 2024 | $2,866 | $177,744 | $52,739 | $125,005 |
| 2023 | $2,866 | $174,259 | $51,705 | $122,554 |
| 2022 | $2,560 | $170,843 | $50,692 | $120,151 |
| 2021 | $2,536 | $167,495 | $49,699 | $117,796 |
| 2020 | $2,436 | $165,779 | $49,190 | $116,589 |
| 2019 | $2,444 | $162,529 | $48,226 | $114,303 |
| 2018 | $2,348 | $159,343 | $47,281 | $112,062 |
| 2017 | $2,337 | $156,219 | $46,354 | $109,865 |
| 2016 | $2,343 | $153,157 | $45,446 | $107,711 |
| 2015 | $2,309 | $150,858 | $44,764 | $106,094 |
| 2014 | $2,539 | $147,904 | $43,888 | $104,016 |
Source: Public Records
Agents Affiliated with this Home
-
Yilin Yu
YY
Seller's Agent in 2026
Yilin Yu
Beyond Mortgage Co
(408) 207-5635
2 in this area
19 Total Sales
-
Shun Ye
SY
Seller Co-Listing Agent in 2026
Shun Ye
Beyond Mortgage Co
(650) 861-7603
2 in this area
19 Total Sales
-
Tim XU
Buyer's Agent in 2026
Tim XU
eXp Realty of California Inc.
(916) 505-7868
1 in this area
24 Total Sales
-
Ulli Rieckmann-Fechner
Seller's Agent in 2024
Ulli Rieckmann-Fechner
Coldwell Banker Realty
(408) 679-0333
3 in this area
6 Total Sales
-
Jia Shi
Buyer's Agent in 2024
Jia Shi
Coldwell Banker Realty
(510) 610-2017
1 in this area
97 Total Sales
-
Mandy Zhang
Buyer Co-Listing Agent in 2024
Mandy Zhang
Coldwell Banker Realty
(650) 445-1111
1 in this area
33 Total Sales
Map
Source: MLSListings
MLS Number: ML82042505
APN: 342-11-081
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