A high-quality Peninsula duplex with stable income, minimal expense drag, and clearly defined long-term upside.117 N. Delaware Street presents a rare opportunity to acquire a well-located duplex in the heart of San Mateo. The property consists of two large units, each configured as 3 bedrooms and 2 bathrooms with garage parking offering strong fundamentals for both owner-occupiers and long-term investors. With tenants in place for over 20 years, the asset provides stable in-place income and a clear path for predictable rent growth under California rent control guidelines. The property currently generates $7,610 per month ($91,320 annually), with a highly efficient expense. Market rents for comparable units are estimated at approximately $4,500+ per month, indicating meaningful long-term upside. At market levels, the property would generate approximately $108,000. Generous layouts, strong rental demand and a desirable unit mix support long-term growth and income optimization. Don’t miss this rare opportunity whether as an investment or a property you could occupy!
AGENT: Tim Gilmartin LISTING BROKERAGE: Gilmartin Group
Courtesy of Gilmartin Group. Disclaimer: All data relating to real estate for sale on this page comes from the Broker Reciprocity (BR) of the California Regional Multiple Listing Service. Detailed information about real estate listings held by brokerage firms other than The Agency RE include the name of the listing broker. Neither the listing company nor The Agency RE shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. The Broker providing this data believes it to be correct, but advises interested parties to confirm any item before relying on it in a purchase decision. Copyright 2026. California Regional Multiple Listing Service. All rights reserved. 117 N Delaware ST
San Mateo, CA
Property Details
Price:
$1,880,000
MLS #:
ML82043896
Status:
Active
Beds:
0
Baths:
0
Type:
Single Family
Subtype:
Duplex
Neighborhood:
699notdefined
Listed Date:
Apr 21, 2026
Finished Sq Ft:
4,165
Total Sq Ft:
4,165
Lot Size:
5,750 sqft / 0.13 acres (approx)
Year Built:
1990
699 – Not Defined699notdefinedOther
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Schools
School District:
Other
Interior
Cooling
NO
Flooring
TILE, CARP
Heating
CF
Exterior
Accessibility Features
NO
Garage Spaces
4
Parking Spots
2
Parking Total
2
Roof
SHN
Financial
Taxes
$25,839
Map
Community
- Address117 N Delaware ST San Mateo CA
- CitySan Mateo
- CountySan Mateo
- Zip Code94401
