* MILLION DOLLAR REDUCTION!!! * HILLSBOROUGH'S BEST IN CLASS, THIS IS LUXURY! MUST SEE!!! A BREATHTAKING TROPHY ESTATE BLENDING TIMELESS ELEGANCE WITH RESORT-STYLE LIVING. This architectural masterpiece offers an extraordinary layout designed for both grand entertaining & intimate daily life. Sweeping driveway & motor court lead to 2 garages with car lifts ideal for collectors. The outdoor retreat features an infinity-edge pool, spa, expansive pool deck w/ designer pergola, full outdoor kitchen & BBQ, tennis court, guest house, bocce court, rose garden & a dedicated childrens play area. Inside, a dramatic foyer opens to soaring ceilings, a formal living room bathed in natural light, a grand dining room, chefs kitchen w/ breakfast nook & spacious family room. A luxe billiard room w/ wine bar, elegant sitting room, private office & guest suite complete the main level. Upstairs, the primary suite stuns w/ romantic fireplace, spa-inspired bath & oversized walk-in closet. 3 additional ensuite bedrooms & attic storage offer comfort & flexibility. The lower level is a true entertainers dream featuring a cinema-quality home theater, game room & kitchenette.
Single-familyProperty Type
1939Year Built
1.31 acresLot Size
$1,609Price/Sq.Ft.
3 car garageParking
Listed by Stanley Lo•DRE #00874415• Green Banker Realty
Carolands, located between El Camino Real and Skyline Boulevard, is a residential and estate-style Hillsborough neighborhood with grand historic mansions and winding, tree-lined lanes. The neighborhood’s character concentrates around the Carolands Chateau, where formal gardens and gated drives set a quiet, museum-like tone. Architectural cues lean Beaux-Arts and Mediterranean Revival, with long setbacks and curated landscaping. The setting feels tucked into the Peninsula’s foothill edge, with filtered bay views from higher streets. Nearby Burlingame Avenue adds a polished café-and-boutique rhythm without changing Carolands’ hush. Trails and open space at the edge of the hills shape a weekend walking routine.
Provided by Walk Score and Local Logic
Market insights
1600 Marlborough Rd · $14,980,000
DAYS ON MARKET
323 days
The average home goes pending in 14 days.
SALE-TO-LIST
106.6%
Most homes are selling 7% above list price.
LIST PRICE
$14,980,000
Median sale price in this area is $2,144,304. (86% lower than this home)
PRICE DROP
3 price drops
11% of homes in this area have had a price drop in the past month.
Property details
Interior
Exterior
Finance
Interior features
High ceilings
Wet bar
Wine cellar/storage
Storage
Separate family room
Formal entry
Great room
Library
Media/home theatre
Den/Study/Office
Office area
Bonus/hobby room
Artist studio
Bedrooms
7 bedrooms
Ground-floor bedroom
More than one primary bedroom
Walk-in closet(s)
Bathrooms
7 full bathrooms
1 half bathroom
Double sinks
Full bath on ground floor
Primary bath with oversized tub and sunken/garden tub
2+ stall shower(s)
Stone surfaces
Updated bathrooms
Kitchen
Gas cooktop
Dishwasher
Island
Microwave
Refrigerator(s)
Kitchen features (additional — see remarks)
Laundry & utility
Washer and dryer
Heating & cooling
Central forced-air heating (gas)
Cooling: other (see remarks)
Exterior features
Balcony/patio
Barbecue area
Courtyard
Fire pit
Outdoor kitchen
Tennis court(s)
Pool with cover and spa/hot tub
Home design
Detached property
2 stories
Parking
3-car garage
Other parking (see remarks)
Construction
Other foundation (see remarks)
Roof: other (see remarks)
Year built: (see remarks)
Utilities
Public water
Public sewer
Public utilities
Other
Lot size about 1.3138 acres
Zoning: R100
Living area listed (internal record): 9,310
Electricity and solar
View estimated energy costs and solar savings for this home
bridgeMLS, Bay East AOR, or Contra Costa AOR #ML82012140
Aug 19, 2026
Pending
—
Aug 19, 2026
Pending
—
Mar 12, 2026
Price Changed
$14,980,000
$1,609/sq ft
Mar 12, 2026
Price Changed
$14,980,000
$1,609/sq ft
Jan 4, 2026
Price Changed
$15,880,000
$1,706/sq ft
Jan 4, 2026
Price Changed
$15,880,000
$1,706/sq ft
Oct 20, 2025
Price Changed
$16,180,000
$1,738/sq ft
Oct 20, 2025
Price Changed
$16,180,000
$1,738/sq ft
Sep 30, 2025
Listed
$21,170,000
$2,274/sq ft
Sep 30, 2025
Listed
$21,170,000
$2,274/sq ft
*MILLION DOLLAR REDUCTION!!!* HILLSBOROUGH'S BEST IN CLASS, THIS IS LUXURY! MUST SEE!!! A BREATHTAKING TROPHY ESTATE BLENDING TIMELESS ELEGANCE WITH RESORT-STYLE LIVING. This architectural masterpiece offers an extraordinary layout designed for both grand entertaining & intimate daily life. Sweeping driveway & motor court lead to 2 garages with car lifts ideal for collectors. The outdoor retreat features an infinity-edge pool, spa, expansive pool deck w/ designer pergola, full outdoor kitchen & BBQ, tennis court, guest house, bocce court, rose garden & a dedicated childrens play area. Inside, a dramatic foyer opens to soaring ceilings, a formal living room bathed in natural light, a grand dining room, chefs kitchen w/ breakfast nook & spacious family room. A luxe billiard room w/ wine bar, elegant sitting room, private office & guest suite complete the main level. Upstairs, the primary suite stuns w/ romantic fireplace, spa-inspired bath & oversized walk-in closet. 3 additional ensuite bedrooms & attic storage offer comfort & flexibility. The lower level is a true entertainers dream featuring a cinema-quality home theater, game room & kitchenette.
bridgeMLS, Bay East AOR, or Contra Costa AOR #ML80331070
Dec 8, 2003
Sold
$3,325,000
$357/sq ft
Dec 8, 2003
Sold
$3,325,000
$357/sq ft
Oct 8, 2003
Listing Removed
—
Jun 2, 2003
Listed
$3,590,000
$386/sq ft
Jun 2, 2003
Listed
$3,590,000
$386/sq ft
HOME REBUILT IN 1995 UNMATCHED FEATURES 7 BDRMS 7.5 BTHS 2 SUB ZERO REFS, 2 DISHWASHERS IN KITCHEN, 3 CAR ATTACHED GARAGE, HDTV READY BUILT IN NATURAL GAS BBQ, STEREO SPEAKERS IN FRONT DOOR AND BACKYARD
Public Records
Mar 29, 1979
Sold
$175,000
$19/sq ft
Public Records
Aug 1, 1977
Sold
$255,000
$27/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$77,348 (+2.1%)
$3,889,299 + $2,483,911
$6,373,210
2024
$75,760 (+1.6%)
$3,889,299 + $2,483,911
$6,373,210
2023
$74,582 (+4.3%)
$3,813,039 + $2,435,208
$6,248,247
2022
$71,518 (+2.0%)
$3,738,274 + $2,387,460
$6,125,734
2021
$70,103 (+1.7%)
$3,664,975 + $2,340,648
$6,005,623
2020
$68,918 (+2.3%)
$3,593,113 + $2,294,754
$5,887,867
2019
$67,390 (+3.0%)
$3,556,271 + $2,271,225
$5,827,496
2018
$65,443 (+1.5%)
$3,486,541 + $2,226,692
$5,713,233
2017
$64,470 (+2.5%)
$3,351,155 + $2,140,229
$5,491,384
2016
$62,883 (+1.3%)
$3,351,155 + $2,140,229
$5,491,384
2015
$62,074 (+2.6%)
$3,285,447 + $2,098,264
$5,383,711
2014
$60,530 (+3.5%)
$3,172,707 + $2,026,263
$5,198,970
2012
$58,463 (+2.5%)
$3,158,369 + $2,017,106
$5,175,475
2011
$57,044 (+1.4%)
$3,096,441 + $1,977,556
$5,073,997
2010
$56,247 (+13.6%)
$3,035,727 + $1,938,782
$4,974,509
2009
$49,508 (+12.1%)
$3,013,039 + $1,924,293
$4,937,332
2008
$44,162
$3,020,197 + $1,310,865
$4,331,062
Public record
Public record
Permits
Beds
7
Baths
7.5
Stories
2
Lot width
—
Lot depth
—
Lot size
1.31 Acres
Year renovated
1978
Finished Sq. Ft.
7,598
Unfinished Sq. Ft.
—
Total Sq. Ft.
7,598
Year built
1939
Style
Single Family Residential
County
San Mateo County
APN
030182220
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 15, 2026.
May 6, 2027 • Active
Drainage
Install separate cross lot drainage systems for the properties.
Grading
Jul 6, 2022 • Final
Hvac
Remove and replace four furnaces, air conditioning units, and cooling coils.
HVAC
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.
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
2 days above 85° expected this year, 4 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
6/10 Air Factor
11 unhealthy days expected this year, 11 days in 30 years
Provided by First Street
Historical weather
Hillsborough, CA • 94010
Average low and high temperatures (°F)
60
47
62
48
67
50
65
51
68
52
70
54
69
56
72
58
73
59
72
57
63
52
59
50
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
92/ 100
Exceptional sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
10.7 hrs
6.6 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 1600 Marlborough Rd
$13,817,992
$1.2M under list price of $15.0M
Nearby comparable homes
The Redfin Estimate uses 5 recent nearby sales, priced between $4.8M to $12.5M.