An extra-deep lot in downtown San Mateo with two units and room to grow. Built in 1907, this single-family home retains its original character, including an enclosed front porch. It has been converted so that each unit has its own full kitchen and bath. The front unit offers 2 bedrooms and 1 bath, and the back unit offers 1 bedroom and 1 bath. New heating and air conditioning are already in place.
The possibilities are wide open. Live in one unit and let the rent from the other help cover the mortgage. Use both for multigenerational living, with privacy and independence under one roof. Or add it to your portfolio as a two-unit investment. The property is delivered vacant, so you can set your own rents and move at your own pace.
Out back, the oversized yard is a rare find in such a central location. Mature fig and lemon trees frame a generous space for gardening and entertaining, with the potential to expand the existing home or add another dwelling. A detached garage and long driveway offer off-street parking, along with flexibility for storage, a workshop, or a possible future ADU conversion.
Walk to the shops and restaurants of downtown San Mateo, with Caltrain and Hwy 101 close by for an easy commute anywhere on the Peninsula.
For sale
$1,198,000
221 N Delaware St, San Mateo, CA 94401
3beds
1,070sqft
Single Family Residence, Residential
Built in 1907
6,038 Square Feet Lot
$1,383,400 Zestimate®
$1,120/sqft
$-- HOA
What's special
Enclosed front porchOversized yardDetached garage
- 1 hour
- 84
- 5
Zillow last checked:
Listing updated:
Listed by:
Michael Mclean 02033574 650-240-6566,
Coldwell Banker Realty 650-596-5400
Source: MLSListings Inc,MLS#: ML82064806
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 3
- Bathrooms: 2
- Full bathrooms: 2
Dining room
- Features: Other
Family room
- Features: NoFamilyRoom
Heating
- 2 plus Zones
Cooling
- Zoned
Features
- High Ceilings
- Flooring: Carpet, Laminate
Interior area
- Total structure area: 1,070
- Total interior livable area: 1,070 sqft
Property
Parking
- Total spaces: 1
- Parking features: Detached
- Garage spaces: 1
Features
- Stories: 1
Lot
- Size: 6,038 Square Feet
Details
- Parcel number: 032214140
- Zoning: RM0003
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence, Residential
Materials
- Foundation: Pillar/Post/Pier, Crawl Space
- Roof: Composition
Condition
- New construction: No
- Year built: 1907
Utilities & green energy
- Gas: PublicUtilities
- Water: Public
- Utilities for property: Public Utilities, Water Public
Community & HOA
Location
- Region: San Mateo
Financial & listing details
- Price per square foot: $1,120/sqft
- Tax assessed value: $1,111,800
- Date on market: 10/16/2026
- Listing agreement: ExclusiveAgency
Estimated market value
$1,383,400
$1.25M - $1.54M
$5,059/mo
Price history
| Date | Event | Price |
|---|---|---|
| 10/16/2026 | Listed for sale | $1,198,000+9.9%$1,120/sqft |
Source: | ||
| 5/12/2025 | Listing removed | $4,800$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 4/21/2025 | Listed for rent | $4,800$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 10/1/2024 | Sold | $1,090,000+9.2%$1,019/sqft |
Source: | ||
| 9/18/2024 | Pending sale | $998,000$933/sqft |
Source: | ||
| 9/4/2024 | Listed for sale | $998,000$933/sqft |
Source: | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2026 | -- | $1,111,800 +1907.5% |
| 2025 | $2,100 +2.5% | $55,382 +2% |
| 2024 | $2,049 +7.7% | $54,298 +2% |
| 2023 | $1,903 +3% | $53,234 +2% |
| 2022 | $1,848 +7% | $52,191 +2% |
| 2021 | $1,727 +7.2% | $51,169 +1% |
| 2020 | $1,611 +3.4% | $50,646 +2% |
| 2019 | $1,558 +38.9% | $49,654 +2% |
| 2018 | $1,122 +17.2% | $48,682 +2% |
| 2017 | $957 -8.2% | $47,729 +2% |
| 2016 | $1,043 +9.7% | $46,794 +1.5% |
| 2015 | $950 | $46,092 +2% |
| 2014 | $950 | $45,190 +0.5% |
| 2013 | -- | $44,987 +2% |
| 2012 | -- | $44,106 |
| 2011 | -- | $44,106 +2.8% |
| 2010 | -- | $42,920 -0.2% |
| 2009 | -- | $43,023 +2% |
| 2008 | -- | $42,180 +2% |
| 2007 | -- | $41,354 +2% |
| 2006 | -- | $40,544 |
| 2005 | -- | $40,544 +4% |
| 2004 | -- | $38,972 +1.9% |
| 2003 | -- | $38,258 +2% |
| 2002 | -- | $37,509 +2% |
| 2001 | -- | $36,774 +2% |
| 2000 | -- | $36,054 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
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Neighborhood: Central
Nearby schools
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.






