Welcome to 21888 and 21886 Blue Oaks Place, an extraordinary custom estate built/designed by PPG. Perched on a private, sun-filled knoll, this serene retreat offers remarkable privacy and tranquility, close-in (5 minutes from 280), yet free from highway noise. Designed in a timeless California Refined Living style, the property spans approximately 9373 sq ft (including garages, main house and ADU), across 2 separate but adjacent parcels totaling approximately 8.16 acres. The main residence features 6 beds/6.5 baths, with flexibility for a 7th ensuite bedroom, or live in quarters, and area for a potential media/bonus room. The 3 car garage adds convenience & functionality to the main house, while a separate studio/ADU and 2 car garage is located on the adjacent property. Flooded with natural light throughout the day, the home enjoys sweeping views of the Western hills. One of the property's most compelling features is its potential to become a true family compound. With a total allowable MFA of 7,595 and MDA of 11,430 at the 21886 parcel, there is an opportunity to build a substantial second residence, adjacent to the existing ADU and two-car garage. There is also expansion potential remaining at 21888 if desired. Los Altos Schools: Gardner Bullis, Egan, and Los Altos High School
Single-familyProperty Type
2015Year Built
8.16 acresLot Size
$3,083Price/Sq.Ft.
5 garage spacesParking
Listed by Marc Roos•DRE #01128822• Christie's International Real Estate Sereno
Listed by Eric Reitmeir•DRE #02125453• Christie's International Real Estate Sereno
Welcome to 21888 and 21886 Blue Oaks Place, an extraordinary custom estate built/designed by PPG. Perched on a private, sun-filled knoll, this serene retreat offers remarkable privacy and tranquility, close-in (5 minutes from 280), yet free from highway noise. Designed in a timeless California Refined Living style, the property spans approximately 9373 sq ft (including garages, main house and ADU), across 2 separate but adjacent parcels totaling approximately 8.16 acres. The main residence features 6 beds/6.5 baths, with flexibility for a 7th ensuite bedroom, or live in quarters, and area for a potential media/bonus room. The 3 car garage adds convenience & functionality to the main house, while a separate studio/ADU and 2 car garage is located on the adjacent property. Flooded with natural light throughout the day, the home enjoys sweeping views of the Western hills. One of the property's most compelling features is its potential to become a true family compound. With a total allowable MFA of 7,595 and MDA of 11,430 at the 21886 parcel, there is an opportunity to build a substantial second residence, adjacent to the existing ADU and two-car garage. There is also expansion potential remaining at 21888 if desired. Los Altos Schools: Gardner Bullis, Egan, and Los Altos High School
Year
Property tax
Land + Additions
Assessment*
2025
$78,053 (+3.6%)
$3,126,070 + $3,501,671
$6,627,741
2024
$75,330 (+1.4%)
$3,064,775 + $3,433,011
$6,497,786
2023
$74,327 (+0.9%)
$3,004,682 + $3,365,698
$6,370,380
2022
$73,653 (−0.4%)
$2,945,767 + $3,299,704
$6,245,471
2021
$73,975 (−0.8%)
$2,888,007 + $3,235,004
$6,123,011
2020
$74,575 (+5.1%)
$2,831,380 + $3,171,573
$6,002,953
2019
$70,945 (+1.2%)
$2,802,348 + $3,139,053
$5,941,401
2018
$70,113 (+1.8%)
$2,747,400 + $3,077,503
$5,824,903
2017
$68,857 (+81.2%)
$2,640,716 + $2,958,000
$5,598,716
2016
$37,998
$2,640,716 + $2,958,000
$5,598,716
Public record
Beds
5
Baths
7
Stories
1
Lot width
—
Lot depth
—
Lot size
5.49 Acres
Year renovated
2016
Finished Sq. Ft.
5,777
Unfinished Sq. Ft.
—
Total Sq. Ft.
5,777
Year built
2015
Style
Single Family Residential
County
Santa Clara County
APN
18225025
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Aug 26, 2026.
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
3/10 Heat Factor
8 days above 88° expected this year, 17 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
7/10 Air Factor
13 unhealthy days expected this year, 13 days in 30 years
Provided by First Street
Historical weather
Los Altos Hills, CA • 94022
Average low and high temperatures (°F)
62
44
64
47
71
49
69
50
75
53
78
55
79
58
82
59
81
61
76
56
65
49
61
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
87/ 100
Very good sunlight
Sunscore
This home receives average direct sun exposure in Los Altos Hills. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
9.1 hrs
5.5 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 21888 Blue Oaks Pl
We cannot show automated home-value estimates for this home.
Nearby homes have recently sold between $6,125,000 and $11,450,000.
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $6.1M to $11.4M.