Outstanding development opportunity near Daly City BART. 421 San Diego Ave is being offered in tandem with 425 San Diego Ave. Zoned R-1A and situated on oversized lots, this site presents versatile options for multi-unit residential development. Construct two duplex buildings, each with an attached or detached Accessory Dwelling Unit (ADU) resulting in a 6 unit development. Possible paths include constructing two single-family homes, each with an attached or detached ADU (4 units total), or utilizing SB9 to create two detached single-family homes with attached ADUs maximizing potential up to 8 units (buyer to verify). Additional highlights: - Level lots simplify construction - No permits required for tree removal - Gas service has been removed for easier demolition - Existing structure may qualify for financing Ideal for developers or investors seeking flexibility, location, and long-term potential in one of Daly City's most commuter-friendly pockets.
For sale
$1,390,000
421 San Diego Ave, Daly City, CA 94014
2beds
710sqft
Est.:
Single Family Residence
Built in 1906
7,501.03 Square Feet Lot
$-- Zestimate®
$1,958/sqft
$-- HOA
What's special
Oversized lots
- 79 days
- on Zillow |
- 392 |
- 10 |
Zillow last checked: 7 hours ago
Listing updated: June 05, 2025 at 10:56am
Listed by:
Sonny Tang DRE #01949981 415-606-8677,
Corcoran Icon Properties 650-757-0888,
Craig E. Brown DRE #01965791 415-640-2901,
Corcoran Icon Properties
Source: SFAR,MLS#: 425040066
Originating MLS: San Francisco Association of REALTORS

Travel times
Tour with a buyer's agent
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Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 1
- Full bathrooms: 1
Primary bedroom
- Area: 0
- Dimensions: 0 x 0
Bedroom 1
- Area: 0
- Dimensions: 0 x 0
Bedroom 2
- Area: 0
- Dimensions: 0 x 0
Bedroom 3
- Area: 0
- Dimensions: 0 x 0
Bedroom 4
- Area: 0
- Dimensions: 0 x 0
Dining room
- Area: 0
- Dimensions: 0 x 0
Family room
- Area: 0
- Dimensions: 0 x 0
Kitchen
- Area: 0
- Dimensions: 0 x 0
Living room
- Area: 0
- Dimensions: 0 x 0
Features
- Has fireplace: No
Interior area
- Total structure area: 710
- Total interior livable area: 710 sqft
Property
Lot
- Size: 7,501.03 Square Feet
Details
- Parcel number: 003080590
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Condition
- Year built: 1906
Community & HOA
HOA
- Has HOA: No
Location
- Region: Daly City
- Elevation: 0
Financial & listing details
- Price per square foot: $1,958/sqft
- Tax assessed value: $25,591
- Annual tax amount: $545
- Price range: $1.4M - $1.4M
- Date on market: 6/4/2025
- Total actual rent: 0
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