1 / 40

$5,800,000

3900 Marsten Avenue

Belmont, CA 94002

Under Contract

San Mateo

County

Land

Property Type

About this home

*NEW PRICE* RARE Peninsula Offering! One of the Last Open Parcels for Possible Luxury Development! Extraordinary opportunity to acquire lone of the last remaining open tract of land! Bucolic setting, sweeping natural beauty, unmatched future potential. Per the Seller, this property of approx. 19.75 acres may offer the possibility to create 6 to 8 parcels, each envisioned for a luxury estate home+ ADU. Buyer can choose to pursue and qualify under Cal. SB9, a parcel could potentially accommodate 2luxury estate homes + ADUs. *No development potential has been verified. This special property could lend itself to a range of uses: multi-generational living, income opportunity, a family compound, private gated community, premium investment, or signature development, all subject to Buyer investigation & City & County Building Division approval. Part of the acreage was formerly used as a farmhouse with horse stalls & corral, enhancing the property's character & versatility. The lands mature landscape, peaceful surroundings create an environment seldom available! Minutes to premier schools, transportation, SF/Silicon Valley, modern conveniences. A highly coveted location! Buyer must conduct their due diligence regarding buildability, development feasibility, allowable uses & lot size.

Listed by Wong Real Estate Grp · DRE #70010239 · KW Advisors

MLS #1147571384

ListedDec 7, 2025

Property Details

Architecture

StoriesN/A

StyleN/A

Total UnitsN/A

RoofN/A

Garage SpacesN/A

PoolN/A

SpaN/A

Features & Amenities

Interior FeaturesN/A

Exterior FeaturesN/A

FlooringN/A

CoolingN/A

HeatingN/A

FireplaceN/A

LaundryN/A

Parking FeaturesN/A

Parking Total0

Patio & PorchN/A

Entry LevelN/A

Entry LocationN/A

Common WallsN/A

Property Features

Lot Size19.75 ac

Lot FeaturesRolling Slope

ViewN/A

DirectionsFrom Ralston, turn onto Christian, then immediate right onto Ralston Ranch Road, park at the cul de sac on your left. (See the 2nd photo) Marsten Ave starts here. The dirt road/path goes thru the tract. Do not drive the road as this is private property.

Community

Area699 - Not Defined

School DistrictOther

Tax & Financial

TermsN/A

Land LeaseN/A

HOA NameN/A

HOA FeeN/A

Request a Tour

Mortgage Estimate

$30,870/mo

20% down · 7% APR · 30-yr fixed

Purchase PriceDown Payment: 20%Interest Rate: 7%

Estimate only. Does not include taxes, insurance, or HOA.

Last updated: October 21, 2026 at 5:45 PM

The multiple listing data appearing on this website is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. All listing data, including but not limited to square footage and lot size, is believed to be accurate but is not guaranteed by the listing Agent, listing Broker, or CRMLS. Buyers are responsible for verifying the accuracy of all information and should independently investigate the data or retain appropriate professionals prior to making any decisions. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information herein may or may not have been the Listing and/or Selling Agent. Properties may or may not be listed by the office/agent presenting the information. The listing broker's offer of compensation is made only to participants of the MLS where the listing is filed.