New construction

$1,900,000

23 South Idaho, San Mateo, CA 94401

9beds

6,017sqft

$12,148/mo

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Other, Residential

Built in 1940

7,828 Square Feet Lot

$1,836,400 Zestimate^®

$316/sqft

$-- HOA

What's special

Attached garages

Prime development opportunity to build THREE (3) 3-bedroom single family homes in the heart of San Mateo! City approved plans for the three (3) detached homes with attached garages totaling approximately 6,017 SF. The expansive R-3 zoned 7,828 SF lot offers several exceptional development strategies. Create a brand-new detached multi-generational living compound. Live in one home, sell the other two. Or build and sell all three homes. The proposed homes are approximately 2,086, 1,990, and 1,941 SF. Conveniently located near Downtown San Mateo, Caltrain, Central Park, shopping, dining, and 101. An existing single-family home occupies the parcel. A rare opportunity to develop three (3) new detached homes in a highly desired San Mateo location.

7 days

351

15

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 9
Bathrooms: 11
Full bathrooms: 9
1/2 bathrooms: 2

Dining room

Features: Other

Family room

Features: Other

Heating

Other

Cooling

Other

Interior area

Total structure area: 6,017
Total interior livable area: 6,017 sqft

Property

Parking

Total spaces: 3
Parking features: Attached
Attached garage spaces: 3

Features

Fencing: Other

Lot

Size: 7,828 Square Feet
Features: Level

Details

Parcel number: 033127080
Zoning: RM0003
Special conditions: Standard

Construction

Type & style

Home type: SingleFamily
Property subtype: Other, Residential

Materials

Foundation: Other
Roof: Other

Condition

New construction: Yes
Year built: 1940

Utilities & green energy

Gas: Other
Sewer: Public Sewer
Water: Public
Utilities for property: Other, Water Public

Community & HOA

Location

Region: San Mateo

Financial & listing details

Price per square foot: $316/sqft
Date on market: 7/27/2026
Listing agreement: ExclusiveRightToSell

Estimated market value

$1,836,400

$1.74M - $1.93M

Not available

Price history

Date	Event	Price
7/28/2026	Listed for sale	$1,900,000$316/sqft
Source: MLSListings Inc #ML82055666 Report a problem

Public tax history

Tax history is unavailable.

Monthly payment

Est. payment

Payment breakdown

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Principal & interest
$1,547
Mortgage insurance
$0
Property taxes
$170
Home insurance
$105
HOA fees
$0
Utilities
Not included

All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.

HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.

Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.

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Climate risks

Neighborhood: Central

Getting around

79 / 100

Very Walkable

45 / 100

Some Transit

74 / 100

Very Bikeable

Nearby schools

GreatSchools rating

4/10
Beresford Elementary School
Grades: K-5Distance: 2.5 mi
4/10
Abbott Middle School
Grades: 6-8Distance: 3.1 mi
9/10
San Mateo High School
Grades: 9-12Distance: 0.6 mi

Schools provided by the listing agent

District: SanMateoFosterCityElementary

Source: MLSListings Inc. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.