OFF MARKET

Off Market Dec 2021 for $30M

$35,206,774

Est. refi paymentEst. refi $153,768/mo

•

16,000

sq ft

891 Crystal Springs Rd, Hillsborough, CA 94010

About this home

Rare opportunity to own one of the largest parcels of land, 47+acres, on the San Francisco Peninsula with sweeping views of the SF Bay and City Skyline. This legacy property, circa 1912, has been transformed for today with renovations including a fully restored and expanded 5-star kitchen with space for a personal chef, the grand living room with restored windows, a library with leather walls & fireplace. Separate cocktail room and dining room. Behind the scenes, upgrades to infrastructure include fiber optic cable under the driveway, high end security system, interior sound system and restoration to several of-the-era features. Just 15 minutes to SFO airport & private jet center. Reservoir on the property for landscape irrigation. Excellent public and private schools.

Single-familyProperty Type

1916Year Built

47.4 acresLot Size

$2,200Est. Price/Sq.Ft.

3 car garageParking

Listed by Brent & Mary Gullixson •DRE #70001879 • Compass

Contact: 650-888-0860

Bought with John Bretthauer •DRE #01480256 • Real Estate Experts ERA Powered

Redfin checked: a minute ago

•Source:MLSListings #ML81866353

Redfin Estimate

$35,206,774

$5.2M since sold in December 2021$6.0M since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 248.8% higher than the average sale price ($10.09M) of 6 comparable homes.

SOLD SEP 4, 2026
$12,019,880
A
6 beds6.5 baths6,310 sq ft
862 Chiltern Rd, Hillsborough, CA 94010
SOLD JUN 23, 2026
$5,600,000
B
6 beds7 baths5,050 sq ft
1325 Marlborough Rd, Hillsborough, CA 94010
SOLD JUL 14, 2026
$10,500,000
C
7 beds7 baths8,145 sq ft
225 TOBIN CLARK Dr, Hillsborough, CA 94010
SOLD JUN 18, 2026
$15,190,000
D
5 beds5.5 baths8,500 sq ft
245 W Santa Inez Ave, Hillsborough, CA 94010
SOLD JUN 8, 2026
$10,750,000
E
7 beds6 baths5,316 sq ft
655 Hayne Rd, Hillsborough, CA 94010
SOLD AUG 26, 2026
$6,500,000
F
5 beds7.5 baths4,555 sq ft
452 Roblar Ave, Hillsborough, CA 94010

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Earn from this home

Sell

$11,566,418

Est. take-home

List your home with Redfin and save $176,034

Refinance

Est. cash available

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Rent

$10,987/mo

Redfin rental estimate

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Market trends in 94010, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

106.8%

0.4% MoM

Median sale price

$4.0M

$165K MoM

Avg. days on market

14d

2 days MoM

Recently sold homes

121

8 MoM

New listings for sale

NEW 6 HRS AGO
$28,000
4 beds3.5 baths4,780 sq ft
955 Macadamia Ave, Hillsborough, CA 94010
(650) 348-0222
EARLY ACCESS
$1,098,000
2 beds2 baths1,186 sq ft
1210 Bellevue Ave #207, Burlingame, CA 94010
NEW 21 HRS AGO
$3,980,000
5 beds2.5 baths3,050 sq ft
1560 Cypress Ave, Burlingame, CA 94010
$39,000,000
9 beds7 baths14,290 sq ft
85 Fagan Dr, Hillsborough, CA 94010
$995,000
2 beds2.5 baths1,400 sq ft
16 Lorton Ave #3, Burlingame, CA 94010
3D WALKTHROUGH
$5,998,000
5 beds5 baths4,850 sq ft
40 Eugenia Way, Hillsborough, CA 94010
$4,087,000
4 beds3.5 baths3,150 sq ft
30 Bluebell Ln, Hillsborough, CA 94010
VIDEO TOUR
$4,995,000
3 beds3 baths2,680 sq ft
739 El Cerrito Ave, Hillsborough, CA 94010
3D & VIDEO TOUR
$4,398,000
4 beds2.5 baths3,110 sq ft
1345 Lakeview Dr, Hillsborough, CA 94010
OPEN SUN, 2PM TO 4PM
$5,498,000
6 beds4 baths3,230 sq ft
15 Mc Kenzie Ct, Hillsborough, CA 94010
See all

Provided by Redfin

Sale history for 891 Crystal Springs Rd

Date

Event

Price

MLSListings #ML81866353

Dec 2, 2021

Sold

$30,000,000

$1,875/sq ft

Nov 23, 2021

Pending

—

Nov 13, 2021

Contingent

—

Oct 11, 2021

Listed

$31,990,000

$1,999/sq ft

Public Records

Jun 16, 2017

Sold

$23,364,000

$1,460/sq ft

MLSListings #ML81497015

Jun 16, 2017

Sold

—

Jun 13, 2017

Pending

—

Nov 11, 2016

Price Changed

$29,850,000

$1,866/sq ft

Oct 3, 2016

Relisted

—

Aug 18, 2016

Contingent

—

Aug 18, 2016

Pending

—

Aug 17, 2016

Contingent

—

Jul 21, 2016

Pending

—

Jun 25, 2016

Contingent

—

Mar 23, 2016

Price Changed

$34,900,000

$2,181/sq ft

Oct 30, 2015

Relisted

—

Oct 14, 2015

Contingent

—

Jul 26, 2015

Listed

$39,900,000

$2,494/sq ft

The original life estate condition for the de Guigne family HAS BEEN REMOVED on this property ~ Rare & unique opportunity to buy one of the largest parcels of land on the San Francisco Peninsula ~ Approx. 47.4 acres midway between Silicon Valley & San Francisco, just 8 miles to SFO airport & private jet center ~ Over 100 year old mansion with Bay views, pool, hiking trails, canyons & reservoir ~ Ballroom, banquet dining, professional kitchen ~ Detached 3-car garage, 8-car carport, and tremendous motor court parking ~ Truly a landmark property with potential to subdivide.

Year

Property tax

Land + Additions

Assessment*

2025

$362,152 (+2.0%)

$25,870,128 + $6,602,835

$32,472,963

2024

$355,005 (+1.5%)

$25,362,871 + $6,473,368

$31,836,239

2023

$349,893 (+4.4%)

$24,865,560 + $6,346,440

$31,212,000

2022

$335,288 (+19.3%)

$24,378,000 + $6,222,000

$30,600,000

2021

$281,126 (+1.6%)

$23,900,000 + $6,100,000

$30,000,000

2020

$276,621 (+2.1%)

$23,536,979 + $1,513,947

$25,050,926

2019

$270,871 (+2.9%)

$23,295,637 + $1,498,424

$24,794,061

2018

$263,294 (+358.3%)

$22,838,860 + $1,469,044

$24,307,904

2017

$57,451 (+2.6%)

$2,470,558 + $2,379,507

$4,850,065

2016

$56,018 (+1.3%)

$2,470,558 + $2,379,507

$4,850,065

2015

$55,274 (+2.6%)

$2,422,116 + $2,332,850

$4,754,966

2014

$53,890 (+3.6%)

$2,339,001 + $2,252,799

$4,591,800

2012

$52,033 (+2.6%)

$2,328,430 + $2,242,618

$4,571,048

2011

$50,726 (+1.4%)

$2,282,775 + $2,198,646

$4,481,421

2010

$50,007 (+0.1%)

$2,238,015 + $2,155,536

$4,393,551

2009

$49,941 (+2.3%)

$2,221,289 + $2,139,427

$4,360,716

2008

$48,805

$2,226,566 + $2,144,510

$4,371,076

Tax history for 891 Crystal Springs Rd

Year

Property tax

Land + Additions

Assessment*

2025

$362,152 (+2.0%)

$25,870,128 + $6,602,835

$32,472,963

2024

$355,005 (+1.5%)

$25,362,871 + $6,473,368

$31,836,239

2023

$349,893 (+4.4%)

$24,865,560 + $6,346,440

$31,212,000

2022

$335,288 (+19.3%)

$24,378,000 + $6,222,000

$30,600,000

2021

$281,126 (+1.6%)

$23,900,000 + $6,100,000

$30,000,000

2020

$276,621 (+2.1%)

$23,536,979 + $1,513,947

$25,050,926

2019

$270,871 (+2.9%)

$23,295,637 + $1,498,424

$24,794,061

2018

$263,294 (+358.3%)

$22,838,860 + $1,469,044

$24,307,904

2017

$57,451 (+2.6%)

$2,470,558 + $2,379,507

$4,850,065

2016

$56,018 (+1.3%)

$2,470,558 + $2,379,507

$4,850,065

2015

$55,274 (+2.6%)

$2,422,116 + $2,332,850

$4,754,966

2014

$53,890 (+3.6%)

$2,339,001 + $2,252,799

$4,591,800

2012

$52,033 (+2.6%)

$2,328,430 + $2,242,618

$4,571,048

2011

$50,726 (+1.4%)

$2,282,775 + $2,198,646

$4,481,421

2010

$50,007 (+0.1%)

$2,238,015 + $2,155,536

$4,393,551

2009

$49,941 (+2.3%)

$2,221,289 + $2,139,427

$4,360,716

2008

$48,805

$2,226,566 + $2,144,510

$4,371,076

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Public record
Permits

Beds

Baths

9.5

Stories

Lot width

—

Lot depth

—

Lot size

47.1 Acres

Year renovated

—

Sq. Ft.

12,380

Year built

1916

Style

Single Family Residential

County

San Mateo County

APN

038200020

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Sep 2, 2026.

Nov 4, 2026 • Active

Demolition

Demolish an existing pool, backfill the area, and install paver tiles.

Demolition

Pool and hot tub

Jan 22, 2026 • Final

Gas line

Cap a secondary utility line and meter due to non-usage.

Gas

Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.

Property details

Parking

Parking Information
Garage (Minimum): 3
Garage (Maximum): 3
Parking Description: Carport, Detached, Electric Gate, Off-Site Parking
Electric Vehicle Hookup Type: Electric Vehicle Hookup Level 2 (240 volts)
Garage Spaces: 3

Interior

Bedroom Information
# of Bedrooms (Minimum): 7
# of Bedrooms (Maximum): 7

Bathroom Information
# of Baths (Full): 9
# of Baths (1/2): 1
Bathroom Description: Bidet, Shower and Tub, Stall Shower

Room Information
Family Room Description: Separate Family Room
Dining Room Description: Eat in Kitchen, Formal Dining Room
Kitchen Description: Dishwasher, Exhaust Fan, Freezer, Hood Over Range, Island, Oven Range (Built-In, Gas)

Interior Features
Laundry: In Utility Room

Fireplace Information
Has Fireplace
Fireplace Description: In Family Room, In Living Room, In Primary Bedroom, Other (See Remarks)

Heating & Cooling Information
Heating: Radiant

Exterior

Exterior Features
Roof: Tile, Other (See Remarks)

Building Information
Subclass: Single Family Home
Building Type: Detached
Concrete Slab

Pool Information
Has Pool
Pool Description: In-Ground

Property Features
Living Sq. Ft.: 16,000

Property Information
Property Primary ID: 501537

Lot Information
Lot Acres: 47.4
Lot Size Area Minimum Units: Sq. Ft.
Lot Size Area Maximum Units: Sq. Ft.
Lot Size Source: Assessor
Zoning: R10025

Utilities

Utility Information
Sewer Septic: Sewer (Public)
Utilities: Public Utilities

Water Information
Water: Public

Location

Multi-Unit Information
# of Stories: 3

School Information
Elementary School District: Hillsborough City Elementary
High School District: San Mateo Union High

Public facts

Beds: 9
Baths: 9.5
Sq. Ft.: 12,380
Stories: 2.0
Lot Size: 47.1 acres
Style: Single Family Residential
Year Built: 1916
Year Renovated: —
County: San Mateo County
APN: 038200020

Home facts updated by county records on Sep 2, 2026

Around this home

Schools

South Hillsborough School

Public K-5 • Assigned • 1.0mi

9/10

Crocker Middle School

Public 6-8 • Assigned • 1.8mi

8/10

Aragon High School

Public 9-12 • Assigned • 0.7mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

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

1/10 Heat Factor

1 days above 86° expected this year, 1 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

7/10 Air Factor

12 unhealthy days expected this year, 12 days in 30 years

Provided by First Street

Historical weather

Hillsborough, CA • 94010

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 10.5 hours in June and 5 hours in December, placing it above the U.S. average for solar exposure.

10.5 hrs

5 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$33.45M – $40.49M

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New listings for sale in 94010

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Home values near 891 Crystal Springs Rd

Data from public records.

Address	Redfin Estimate
39 Oak Valley Rd, San Mateo, CA 3 Beds \| 2.5 Baths \| 2380 Sq. Ft.	$2,911,153
16 Oak Valley Rd, San Mateo, CA 4 Beds \| 2.5 Baths \| 2120 Sq. Ft.	$2,929,038

Address	Redfin Estimate
21 Oak Valley Rd, San Mateo, CA 4 Beds \| 4 Baths \| 2070 Sq. Ft.	$4,218,210
25 Melrose Ct, Hillsborough, CA 3 Beds \| 2 Baths \| 1740 Sq. Ft.	$3,877,048

Address	Redfin Estimate
870 Parrott Dr, San Mateo, CA 4 Beds \| 3 Baths \| 2270 Sq. Ft.	$3,353,736
20 Melrose Ct, San Mateo, CA 3 Beds \| 3.5 Baths \| 2874 Sq. Ft.	$5,113,223

Property information provided by MLSListings when last listed in 2021. This data may not match . Learn more.

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 94010, CA

Sale history for 891 Crystal Springs Rd

Tax history for 891 Crystal Springs Rd

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94010

Home values near 891 Crystal Springs Rd

More real estate resources