Peninsula Development Land
3900 Marsten Avenue, Belmont, CA 94002
For Sale
$5,800,000
Under Contract
Land, Belmont, CA
Property SizeContact for details
Lot Size19.75 Acres
Days on Market343
Property Features for 3900 Marsten Avenue
General Information
Property type
Property subtype
Zoning
Lot features
Elementary school
High school
Elementary school district
High school district
Directions
Subdivision
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APN
Lot size
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Listing Agency:
KW Advisors · Keller Williams Realty
(650) 627-3700
Listed By:
Wong Real Estate Grp · License CA #70010239
(650) 619-2790
Added: Dec 7, 2025
Changed: Oct 21
Last Checked: Nov 14 at 5:06AM
MLS# ML82028983
Copyright © 2026 MLS Listings, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
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Investment Insights
Based on property information with market context.
The offering is a roughly 19.75-acre parcel of open land in Belmont, presented as a possible luxury development site. Per the seller, the acreage may support a subdivision concept that could create approximately 6 to 8 parcels, each envisioned for a luxury estate home plus an ADU, subject to buyer due diligence and City/County building approval. The seller also states the buyer may be able to pursue eligibility under Cal. SB9, where a parcel could potentially accommodate two luxury estate homes plus ADUs; however, no development potential has been verified.
The property includes portions that were formerly used as a farmhouse with horse stalls and a corral, contributing to its established agricultural character. The land is described as having mature landscaping and a bucolic setting.
This parcel may fit buyers seeking a large-lot estate, family compound, or a private community-style development approach, with uses that could range from multi-generational living to income or signature development, all subject to verification of buildability, development feasibility, allowable uses, and lot sizing requirements. Buyers should independently confirm what can be built and under which approvals, including any development feasibility with the relevant City and County authorities.
The property includes portions that were formerly used as a farmhouse with horse stalls and a corral, contributing to its established agricultural character. The land is described as having mature landscaping and a bucolic setting.
This parcel may fit buyers seeking a large-lot estate, family compound, or a private community-style development approach, with uses that could range from multi-generational living to income or signature development, all subject to verification of buildability, development feasibility, allowable uses, and lot sizing requirements. Buyers should independently confirm what can be built and under which approvals, including any development feasibility with the relevant City and County authorities.
Key Highlights
- Approx. 19.75‑acre open land parcel with potential for luxury estate development (verification by buyer required)
- Seller suggests the property may support creating 6 to 8 parcels for luxury estate homes with ADUs (subject to due diligence)
- Buyer may pursue options under Cal. SB9; a parcel could potentially accommodate 2 luxury estate homes plus ADUs (subject to qualification)
Property Analytics
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Open Analytics
Location Intelligence
Trade Area within ½ mile
102
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Business Placement
Demographics for 94002, CA
28,513
Population
11,307
Households
2.5
Avg Household Size
40
Median Age
69%
College-Educated
96%
High-School Grad
5.6 sq mi
ZIP Area
5,092
Density / Sq Mi
$204,573
Median Household Income
$120,322
Median Earnings
$2,889
Median Rent
$2,000,001
Median Home Value
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Frequently Asked Questions
What type of property is this?
Residential land & home lot - A roughly 19.75-acre open land tract in Belmont with seller-stated potential for estate home and ADU parcels.
Where is this residential land & home lot located?
The property is located at 3900 Marsten Avenue Belmont, CA.
What is the asking price?
The asking price for this property is $5,800,000.
What are key features of this property?
This property features: Approx. 19.75‑acre open land parcel with potential for luxury estate development (verification by buyer required); Seller suggests the property may support creating 6 to 8 parcels for luxury estate homes with ADUs (subject to due diligence); Buyer may pursue options under Cal. SB9; a parcel could potentially accommodate 2 luxury estate homes plus ADUs (subject to qualification)
