300 31st Ave, San Mateo, CA 94403 - Photo 1

1/1

$2,350,000

Sold
Closed
Single Family
3 Beds
2 Full Baths
1,620 Sq. Ft.
2 Car Garage

1/1

Property Description

Welcome to this beautifully remodeled 3-bedroom, 2-bath home (1620sf) with the ADDED BONUS of a detached ADU (341sf), providing a total of 1961sf of living space. Designed for modern living, the open-concept kitchen features a large island with seating and flows seamlessly into the dining and living rooms, perfect for everyday living and entertaining. The private bedroom wing includes a spacious primary suite with backyard views and two additional bedrooms sharing an updated bath. A versatile playroom adds extra flexibility. The detached ADU, complete with kitchenette and full bath, offers ideal space for guests, extended family, or a home office. Outdoor living shines with an expansive yard featuring a fire pit with built-in seating, a deck, lawn, and dedicated play space. Additional highlights include a two-car garage and prime location across from a pocket park and just a short walk to the newly reimagined Hillsdale Shopping Center. Move-in ready and thoughtfully upgraded, this home truly has it all.

Full Property Details

Full Property Details for 300 31st Ave

General

Sold For: $2,350,000
Status: Closed
Type: Single Family
Source: RE_Infolink
MLS ID: ML82021175
Added to Site: 127 day(s) ago

Interior

Interior Features: Skylight
Fireplace(s): Living Room
Flooring: Wood

Rooms

Bathrooms

Total Bathrooms: 2
Full Bathrooms: 2
Bathroom Features: Double Sinks, Primary - Stall Shower(s), 1 Shower over Tub, Updated Bath

Bedrooms

Total Bedrooms: 3
Bedroom Features: Primary Suite / Retreat, Walk-In Closet

Other Rooms

Family Room: No Family Room
Kitchen: Dishwasher, Hood over Range, Island with Sink, Microwave, Built-In Oven/Range , Gas, Refrigerator, Skylight, Wine Refrigerator
Laundry: In Garage, Washer / Dryer

Additional Information

Extras: Not Applicable

Parking

Garage Spaces: 2
Parking Features: Attached Garage

Location

Area: Park Western Subdivision/Hillsdale
County: San Mateo
Cross Streets: Hacienda Street

Heating & Cooling

Cooling Type: None
Heating Type: Central Air (Gas/Forced Air)

Utilities

Sewer: Public Sewer
Water: Public
Utility Description: Public Utilities

Structural Information

Construction: Detached
Foundation: Concrete Perimeter
Roof: Tile
Square Feet: 1,620
Year Built: 1941

Lot Features

Lot Size (Acres): 0.1515
Minimum Lot Size: 6600
Lot Size (Sq. Ft.): 6,600
Zoning: R10006

Listed by Compass, Sternsmith Group
Sold by Rmacc, Mattie Wei

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Listing agent

— 300 31st Ave —

Sternsmith Group

Compass

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Schools

Schools serving 300 31st Ave

School Districts:San Mateo-Foster City Elementary School District, San Mateo Union High School District

Name	Grades	Distance
Laurel Elementary School, San Mateo, CA 316 36th Avenue, San Mateo, CA 94403	K-5	0.3 mi
Abbott Middle School 600 36th Avenue, San Mateo, CA 94403	6-8	0.4 mi
Hillsdale High School 3115 Del Monte Street, San Mateo, CA 94403	9-12	0.5 mi

Disclaimer: School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 300 31st Ave

Date

Details

Price

Change

Source

10/10/2025

Sold

$2,350,000

6.87%

MLS

9/11/2025

Listed

$2,199,000

—

MLS

Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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Price Reduced

-$79 (-2.14%)

$3,621

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Commercial Lease
Active
Updated 5 hours ago

1,420
Sq. Ft.

Listed by Endri Hoxha (CalRE#: 02059299) (415) 941-9875

1145 California Dr 1145, Burlingame, CA 94010 - Photo 1

Price Reduced

-$188 (-2.81%)

$6,512

1145 California Dr 1145 Burlingame, CA 94010

Commercial Lease
Active
Updated 5 hours ago

2,135
Sq. Ft.

Listed by Endri Hoxha (CalRE#: 02059299) (415) 941-9875

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Just Listed

$3,788,000

Open House

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Single Family
Active
Updated 1 day ago

3
Beds
4
Total Baths
2,248
Sq. Ft.

Listed by Tuscana Properties, Sandra Jamison

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Just Listed

$1,348,000

Open House

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Townhouse
Active
Updated 2 days ago

2
Beds
3
Total Baths
1,380
Sq. Ft.

Listed by Province Real Estate, Tom Ruan

Price Reduced

-$188 (-2.81%)

$6,512

1145 California Dr 1145 Burlingame, CA 94010

Commercial Lease
Active
Updated 5 hours ago

2,135
Sq. Ft.

Listed by Endri Hoxha (CalRE#: 02059299) (415) 941-9875

Price Reduced

-$79 (-2.14%)

$3,621

1145 California Dr 1147 Burlingame, CA 94010

Commercial Lease
Active
Updated 5 hours ago

1,420
Sq. Ft.

Listed by Endri Hoxha (CalRE#: 02059299) (415) 941-9875

1433 Floribunda Ave 7, Burlingame, CA 94010 - Photo 1

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Condo
Active
Updated 9 hours ago

2
Beds
3
Total Baths
1,235
Sq. Ft.

Listed by Compass, John Sayage

1102 Admiralty Ln, Foster City, CA 94404 - Photo 1

1102 Admiralty Ln Foster City, CA 94404

Condo
Active
Updated 2 days ago

1
Bed
1
Total Bath

Listed by Prestige Realty, Michelle Chiou and Prestige Realty, Russ Engle

408 W Hillsdale Blvd, San Mateo, CA 94403 - Photo 1

Sold

$2,350,000

408 W Hillsdale Blvd San Mateo, CA 94403

Single Family
Closed

3
Beds
2
Total Baths
1,690
Sq. Ft.

Listed by Christie's International Real Estate Sereno, Eric Chu
Sold by Redf, Ellie Kravets

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Sold

$2,228,888

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Single Family
Closed

3
Beds
3
Total Baths
1,965
Sq. Ft.

Listed by Compass, Joe Day
Sold by Comps, Joe Day

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Sold

$2,000,000

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Single Family
Closed

4
Beds
2
Total Baths
2,250
Sq. Ft.

Listed by David J. Macdonald Real Estate, David Macdonald
Sold by Bqg, April Zhao

413 36th Ave, San Mateo, CA 94403 - Photo 1

Sold

$2,000,000

413 36th Ave San Mateo, CA 94403

Single Family
Closed

3
Beds
2
Total Baths
1,564
Sq. Ft.

Listed by KW Advisors, Disen Cai RE Group
Sold by Apr, Sternsmith Group

300 31st Ave, San Mateo, CA 94403 (MLS# ML82021175) is a Single Family property that was sold at $2,350,000 on October 10, 2025. Want to learn more about 300 31st Ave? 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.

300 31st Ave San Mateo, CA 94403