Rare, once-in-a-lifetime luxury estate in the prestigious Ryan Tract of Lower Hillsborough. Set on a flat 42,304 sq ft gated lot, this property offers 5 beds, 6.5 baths, solar, regulation tennis court, large pool + separate spa, lush gardens, expansive lawns, multiple patios, putting green, outdoor BBQ, long private driveway, motor court, and 3-car garage. The main residence features an elevator; all bedrooms en-suite; chefs kitchen with butlers pantry; family room; living room; formal dining room; multiple office/workshop spaces; and more. Additional structures include a pool house and a full guest house attached to the garage. Total advertised living space of 7,950 sq ft includes the main house, 945 sq ft 2-bed/2-bath guest house with full kitchen and living/dining area, and a 685 sq ft pool house with living space, kitchenette, laundry, full bath, and sauna. Walking distance to Downtown Burlingame and access to top-rated California schools. A true blend of elegance, scale, and resort-style living.
Sold for $12,000,000
$12,000,000
818 Irwin Dr, Hillsborough, CA 94010
5beds
7,950sqft
Single Family Residence, Residential
Built in 1927
0.97 Acres Lot
$12,925,500 Zestimate®
$1,509/sqft
$27,651 Estimated rent
Home value
$12,925,500
$11.12M - $14.99M
$27,651/mo
Zestimate® history
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List your homeWhat's special
Regulation tennis courtSeveral office workshopsMotor courtLush gardensMultiple patiosFamily roomFormal dining room
Zillow last checked:
Listing updated:
Listed by:
Stanley Lo 00874415 650-373-0007,
Green Banker Realty 650-373-0007
Bought with:
Stanley Lo, 00874415
Green Banker Realty
Source: MLSListings Inc,MLS#: ML82010473
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 7
- Full bathrooms: 6
- 1/2 bathrooms: 1
Rooms
- Room types: Office, Workshop
Bedroom
- Features: PrimaryBedroom2plus
Bathroom
- Features: DoubleSinks, Other, ShowerandTub, Tub
Dining room
- Features: FormalDiningRoom
Family room
- Features: SeparateFamilyRoom
Kitchen
- Features: Island, Other, Pantry
Heating
- Other
Cooling
- Other
Appliances
- Included: Dishwasher, Other, Oven/Range, Refrigerator
- Laundry: Inside
Features
- High Ceilings, Wet Bar, Walk-In Closet(s)
- Flooring: Hardwood
- Fireplace features: Living Room
Interior area
- Total structure area: 7,950
- Total interior livable area: 7,950 sqft
Property
Parking
- Total spaces: 3
- Parking features: Detached
- Garage spaces: 3
Accessibility
- Accessibility features: Elevator/Lift
Features
- Stories: 2
- Patio & porch: Balcony/Patio
- Exterior features: Back Yard, Barbecue, Tennis Court(s)
Lot
- Size: 0.97 Acres
- Features: Level
Details
- Additional structures: Garage, Other, PoolHouse, TennisRaquetball
- Parcel number: 028083010
- Zoning: R10025
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence, Residential
Materials
- Foundation: Other
- Roof: Other
Condition
- New construction: No
- Year built: 1927
Utilities & green energy
- Gas: PublicUtilities
- Sewer: Public Sewer
- Water: Public
- Utilities for property: Public Utilities, Water Public, Solar
Community & HOA
Location
- Region: Hillsborough
Financial & listing details
- Price per square foot: $1,509/sqft
- Tax assessed value: $9,164,370
- Annual tax amount: $108,567
- Date on market: 9/21/2025
- Listing agreement: ExclusiveRightToSell
Price history
| Date | Event | Price |
|---|---|---|
| 12/15/2025 | Sold | $12,000,000-21.5%$1,509/sqft |
Source:  MLSListings Inc #ML82010473 Report a problem | ||
| 9/21/2025 | Pending sale | $15,280,000$1,922/sqft |
Source: MLSListings Inc #ML82010473 Report a problem | ||
| 9/21/2025 | Listed for sale | $15,280,000+188.3%$1,922/sqft |
Source: MLSListings Inc #ML82010473 Report a problem | ||
| 3/8/2013 | Listing removed | $13,800$2/sqft |
Source: Green Banker Report a problem | ||
| 2/13/2013 | Listed for rent | $13,800$2/sqft |
Source: Green Banker Report a problem | ||
| 2/6/2013 | Sold | $5,300,000$667/sqft |
Source: Agent Provided Report a problem | ||
| 12/12/2012 | Pending sale | $5,300,000$667/sqft |
Source: Alain Pinel Realtors - Burlingame #81225090 Report a problem | ||
| 10/5/2012 | Listed for sale | $5,300,000$667/sqft |
Source: Alain Pinel Realtors - Burlingame #81225090 Report a problem | ||
| 8/28/2012 | Pending sale | $5,300,000$667/sqft |
Source: Alain Pinel Realtors - Burlingame #81225090 Report a problem | ||
| 7/7/2012 | Price change | $5,300,000-9.4%$667/sqft |
Source: Alain Pinel Realtors - Burlingame #81225090 Report a problem | ||
| 4/7/2012 | Listed for sale | $5,850,000-5.6%$736/sqft |
Source: Coldwell Banker Residential Brokerage - Burlingame - North #81212565 Report a problem | ||
| 3/6/2012 | Listing removed | $6,200,000$780/sqft |
Source: Coldwell Banker Residential Brokerage - Burlingame - North #81138068 Report a problem | ||
| 9/3/2011 | Listed for sale | $6,200,000$780/sqft |
Source: Coldwell Banker Residential Brokerage #81138068 Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $108,567 +2.1% | $9,164,370 +2% |
| 2024 | $106,370 +1.5% | $8,984,679 +2% |
| 2023 | $104,760 +4.3% | $8,808,512 +2% |
| 2022 | $100,432 +2% | $8,635,799 +2% |
| 2021 | $98,498 +1.7% | $8,466,473 +1% |
| 2020 | $96,867 +2.2% | $8,379,662 +2% |
| 2019 | $94,771 +2.9% | $8,215,357 +2% |
| 2018 | $92,066 +2.4% | $8,054,273 +3.1% |
| 2017 | $89,899 +10.2% | $7,814,974 +10.2% |
| 2016 | $81,559 +0.3% | $7,094,260 +7.8% |
| 2015 | $81,282 | $6,580,620 -7.3% |
| 2014 | $81,282 | $7,096,500 +1441.6% |
| 2013 | -- | $460,330 +2% |
| 2012 | -- | $451,305 |
| 2011 | -- | $451,305 +2.8% |
| 2010 | -- | $439,151 -0.2% |
| 2009 | -- | $440,196 +2% |
| 2008 | -- | $431,566 +2% |
| 2007 | -- | $423,105 +2% |
| 2006 | -- | $414,810 |
| 2005 | -- | $414,810 +4% |
| 2004 | -- | $398,705 +1.9% |
| 2003 | -- | $391,399 +2% |
| 2002 | -- | $383,725 +2% |
| 2001 | -- | $376,202 +2% |
| 2000 | -- | $368,826 |
Find assessor info on the county website
Neighborhood: 94010
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Nearby schools
GreatSchools rating
- 9/10North Hillsborough SchoolGrades: K-5Distance: 0.5 mi
- 8/10Crocker Middle SchoolGrades: 6-8Distance: 0.6 mi
- 10/10Burlingame High SchoolGrades: 9-12Distance: 1.1 mi
Schools provided by the listing agent
- District: HillsboroughCityElementary
Source: MLSListings Inc. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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Estimated market value
$12,925,500
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Estimated market value
$12,925,500
- California
- San Mateo County
- Hillsborough
- 94010
- 818 Irwin Dr
Nearby cities
Nearby zip codes
Other Hillsborough Topics
