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$3,595,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 8 Beds
  • 9 Full Baths
  • 3,839 Sq. Ft.
  • 2 Car Garage
  • Updated 7 hours ago

Next open house:

Open House: 2:00 PM - 4:00 PM

Sunday 10/4 2:00 PM - 4:00 PM

4321 Edison St,San Mateo, CA 94403

4321 Edison StSan MateoCA94403

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Join us at 4321 Edison St on:

  • Open House: 5:00 PM - 6:00 PM

    Tuesday 10/6 5:00 PM - 6:00 PM

    4321 Edison St,San Mateo, CA 94403
    4321 Edison StSan MateoCA94403
  • Open House: 2:00 PM - 4:00 PM

    Saturday 10/10 2:00 PM - 4:00 PM

    4321 Edison St,San Mateo, CA 94403
    4321 Edison StSan MateoCA94403
  • Open House: 2:00 PM - 4:00 PM

    Sunday 10/11 2:00 PM - 4:00 PM

    4321 Edison St,San Mateo, CA 94403
    4321 Edison StSan MateoCA94403
  • Open House: 5:00 PM - 6:00 PM

    Thursday 10/15 5:00 PM - 6:00 PM

    4321 Edison St,San Mateo, CA 94403
    4321 Edison StSan MateoCA94403
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See This Home
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Sophisticated modern living in desirable Westwood Knolls! Situated on a quiet cul-de-sac, extensively renovated and expanded, this exceptional residence offers approx. 3,839 sq. ft. of living space with 8BD/9BA, including a newly constructed two-story rear extension, on an expansive 9,496 sq. ft. lot. The main residence features dramatic 12-ft ceilings, White Oak hardwood floors, an electric fireplace, and accordion glass doors opening to a view deck with breathtaking city and Bay views. The chefs kitchen showcases a waterfall island, quartz countertops, sleek cabinetry, and high-end Thermador appliances, including a built-in wine refrigerator. The main level offers 5BD/6BA, including 4 en-suites, plus a sunroom and family room with fireplace and wet bar. Additional highlights include multi-zone A/C and heating, ceiling speakers, and 3 decks. The downstairs legal ADU (4321A Edison St) offers separate entrance, 3BD/3BA, including 2 en-suites, an open living area, kitchen with eat-in island, sunroom, and a spacious deck. 2-car garage, tankless water heaters, plus an oversized lot with parking for 10+ vehicles, RV, & boat/trailer. Conveniently located near Hillsdale shopping, dining, Caltrain, and major freeways. A rare combination of space, views, modern luxury, and versatility!

Full Property Details for 4321 Edison St

General

  • Price: $3,595,000
  • Status: Active
  • Type: Single Family
  • Source: RE_Infolink
  • MLS ID: ML82063527
  • Updated: Today (10/4/2026)
  • Added to Site: Today

Interior

  • Rooms/Areas: Formal Entry
  • Interior Features: Skylight
  • Fireplace(s): Dual See Thru, Living Room, Other
  • Flooring: Hardwood, Tile, Vinyl / Linoleum

Rooms

Bathrooms

  • Total Bathrooms: 9
  • Full Bathrooms: 9
  • Bathroom Features: 2 Stall Showers or More, Tile, Updated Bath

Bedrooms

  • Total Bedrooms: 8
  • Bedroom Features: More than One Bedroom on Ground Floor, More than One Primary Bedroom, More than One Primary Bedroom on Ground Floor, Primary Suite / Retreate - 2+

Other Rooms

  • Family Room: Separate Family Room
  • Kitchen: 220 Volt Outlet, Countertop - Quartz, Dishwasher, Garbage Disposal, Hood over Range, Microwave, Electric Oven/Range, Refrigerator
  • Laundry: Gas Hookup, Washer, Tub/Sink, Dryer

Additional Information

  • Extras: Not Applicable
  • Security/Safety: Closed Circuit Monitoring (24-hour)

Parking

  • Garage Spaces: 2
  • Parking Features: Attached Garage, Enclosed, Parking Area, Room for Oversized Vehicle

Location

  • Area: Westwood Knolls Etc.
  • County: San Mateo
  • Cross Streets: 43rd Ave

Heating & Cooling

  • Cooling Type: Multi-Zone
  • Heating Type: Central Air (Forced Air), Heat Pump, Heating (2 Zones or More)

Utilities

  • Sewer: Public Sewer
  • Water: Public
  • Utility Description: Individual Electric Meters, Individual Gas Meters, Public Utilities, Natural Gas

Structural Information

  • Architectural Style: Contemporary, Modern / High Tech
  • Construction: Detached, Stone, Wood
  • Foundation: Concrete Perimeter and Slab
  • Roof: Flat / Low Pitch, Shingle
  • Disability Access: None
  • Square Feet: 3,839
  • Year Built: 1949

Lot Features

  • Property View: Bay, Mountains, City Lights
  • Lot Size (Acres): 0.218
  • Minimum Lot Size: 9496
  • Lot Size (Sq. Ft.): 9,496
  • Grounds/Landscape: Back Yard, Balcony / Patio, BBQ Area, Deck , Fenced, Sprinklers - Lawn
  • Zoning: R10006
  • Lot Description: Grade Slopes Down, Views
  • Fencing (Description): Other, Wood

Green Features

  • Energy Efficient: Skylight, Thermostat Controller, Double-Pane Windows

Listed by CENTURY 21 Masters, Patrick Lam

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Listing agent

— 4321 Edison St —

  • Patrick Lam

    CENTURY 21 Masters

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 4321 Edison St

School Districts:San Mateo-Foster City Elementary School District, San Mateo Union High School District
NameGradesDistance
Laurel Elementary School, San Mateo, CA
316 36th Avenue, San Mateo, CA 94403
K-50.7 mi
Abbott Middle School
600 36th Avenue, San Mateo, CA 94403
6-80.9 mi
Hillsdale High School
3115 Del Monte Street, San Mateo, CA 94403
9-121.2 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 4321 Edison St Get Price Alerts and Save Property

Date
Details
Price
Change
Source
10/04/2026
Listed
$3,595,000
162.41%
MLS
11/29/2017
Sold
$1,370,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 4321 Edison St

Year
Property Taxes
Change
Tax Assessment
Change
2025
$27,378
—
$2,387,997
3%
2025
$27,378
14%
$2,316,822
17%
2024
$23,950
6%
$1,983,118
7%
2023
$22,675
11%
$1,857,393
11%
2022
$20,473
14%
$1,668,416
16%
2021
$18,030
3%
$1,440,114
1%
2020
$17,452
2%
$1,425,348
2%
2019
$17,118
7%
$1,397,400
2%
2018
$15,984
330%
$1,370,000
369%
2017
$3,716
-1%
$292,045
2%
2016
$3,749
3%
$286,320
2%
2015
$3,640
-7%
$282,021
2%
2014
$3,928
12%
$276,498
—
2013
$3,505
—
$275,250
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 4321 Edison St

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with our affiliated lender
NMLS#: 1598647

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Listed by CENTURY 21 Masters, Patrick Lam

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4321 Edison St, San Mateo, CA 94403 (MLS# ML82063527) is a Single Family property with 8 bedrooms and 9 full bathrooms. 4321 Edison St is currently listed for $3,595,000 and was received on October 04, 2026. Want to learn more about 4321 Edison St? Do you have questions about finding other Single Family real estate for sale in San Mateo? You can browse all San Mateo real estate or contact a Coldwell Banker agent to request more information.

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