40 photos · MLS data verified October 9, 2026 · Updated every 15 min
$5,800,000
ActiveUnderContract
0 Beds·0 Baths·0 sqft·860,310 sqft lot·Built N/A
3900 Marsten Ave, Belmont, CA 94002
Listed 306 days ago · | MLS# ML82028983
$0/sqft
3900 Marsten Ave is a home in Belmont 94002. It is listed at $5,800,000.
Est. $36,399/moP&I $30,095 · Tax $6,042 · Insurance $262 · HOA $0Assumes 20% down ($1,160,000) at 6.75% · Contact Timothy for a lender referralAegis Luxury Real Estate is a licensed California real estate brokerage (DRE# 01328224) and is not a mortgage lender, mortgage broker, or loan originator. The figures shown are estimates for general reference only and do not constitute a loan offer, pre-approval, pre-qualification, or commitment to lend. Estimates use a property tax rate of 1.25% of home price annually. Actual rates, payments, taxes, and insurance vary by lender and borrower qualifications. Contact Timothy for a referral to one of our preferred lending partners.
24Active in Belmont
1.1 moInventory
About 3900 Marsten Ave
*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.
MLS ID #ML82028983, Wong Real Estate Grp. Listing provided by KW Advisors · MLSListings Inc.
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Property Details for 3900 Marsten Ave
Overview
- Property Type
- ResidentialDevelopmentLand
- Bathrooms
- 0 Full
- Lot Size
- 860,310 sqft (19.75 acres)
- Status
- ActiveUnderContract
Exterior and Parking
- Lot Features
- Grade rolling
- Fencing
- None
- Zoning
- A00000
Community and HOA
- County
- San Mateo
- City
- Belmont
Schools
- School District
- Belmont Redwood Shores Elementary
- Belmont Schools
- View Belmont schools
Listing
- MLS Number
- ML82028983
- Listed
- December 7, 2025
- Days on Market
- 306
- Listing Agent
- Wong Real Estate Grp
- Listing Brokerage
- KW Advisors
- Data Verified
- October 9, 2026
Source: MLSListings Inc. School attendance boundaries are set by the district and can change; verify directly with the district.
Free from Aegis · Updated for October 2026
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Location
3900 Marsten Ave, Belmont, CA 94002 · San Mateo County
Market Context
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Get My Offer Range →Frequently Asked Questions
Listed at $5,800,000.
Listed December 7, 2025. That is 306 days on market as of October 9, 2026.
Est. $36,399/mo with 20% down ($1,160,000) at 6.75%. That is principal and interest $30,095, property tax $6,042 and insurance $262. The assumptions and lender disclosure are with the payment estimate at the top of this page.
There are 24 active listings in Belmont.
Yes. As of October 9, 2026, 3900 Marsten Ave is an active listing at $5,800,000.
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Timothy Alston
Broker · DRE# 01328224 · Over 23 Years Experience
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Buyers
See 3900 Marsten Ave before the weekend
Listed 306 days ago.
Questions
Talk to Timothy directly
Timothy Alston, Broker, DRE# 01328224. Over 23 years in Silicon Valley real estate.
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