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3173 3173a 21st Street

San Francisco, CA 94110

6 beds
2 baths
2,350 sqft
2,113 sqft lot
$676 per sqft
1900 build
– on site

3173-3173A 21st Street is a 4-unit property featuring 3 residential apartmentstwo (2) 1-bedroom units and one (1) spacious 4-bedroom, 2 bath unitalongside an ADA compliant ground-floor commercial space that was last operated as a hair salon and is now vacant and ready to be leased. A shovel ready and roughed-out 2 bedroom ADU on the ground floor awaits finishing by a future owner, offering additional income potential once completed. With the existing units brought up to market rents and the ADU finished, there is approximately 60% upside in the current rent roll. With separate individual water meters, new 400 amp electrical service, the property benefits from extremely efficient operating expenses making this an attractive opportunity for an investor seeking both stable income and growth potential.

Listing courtesy of SFMLS / Urban Capital SF

Last checked: Checking… • Last updated Jul 15, 2025 •

MLS# 425055394 —

The Building

Year Built:

1900
Roof:

Tar/Gravel
Basement:

Unfinished
Basement:

true
Foundation Details:

Concrete
Building Area Total:

2350
Building Area Units:

Square Feet
Building Area Source:

Assessor Auto-Fill

Interior

Interior Features:

Storage
Laundry Features:

Coin Operated

Room Dimensions

Living Area:

2350
Living Area Units:

Square Feet
Living Area Source:

Assessor Auto-Fill

Location

Cross Street:

Capp St
Latitude:

37.7568902
Longitude:

-122.418301

The Property

Parcel Number:

3615031B
Property Type:

Residential Income
Property Subtype:

Mixed Use
Lot Features:

Shape Regular
Lot Size Area:

2113
Lot Size Acres:

0.0485
Lot Size Square Feet:

2113
Lot Size Units:

Square Feet
Irrigation Water Rights:

false
Elevation Units:

Feet

Listing Agent

Contact info:

Beds

Total Bedrooms:

6

Baths

Total Baths:

2
Full Baths:

2

Heating & Cooling

Heating:

Electric
Heating:

true

Utilities

Electric:

Separate Meter
Water Source:

Separate Meter

Appliances

Appliances:

Electric Water Heater

The Community

Association:

false

Parking

Garage:

false
Carport:

false
Open Parking:

false

Explore the Area

My Commute

From

Walk Score®

Provided by WalkScore® Inc.

Bike Score®

Provided by WalkScore® Inc.

Transit Score®

Provided by WalkScore® Inc.

Soundscore™

Provided by HowLoud

Sale history

Date	Event	Source	Price	% Change
7/10/25 Jul 10, 2025	Listed / Active	SFMLS	$1,590,000

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This multifamily located in Southeast San Francisco, San Francisco, CA 94110 is currently for sale for $1,590,000. 3173 3173a 21st Street is a 2,350 square foot multifamily with 6 beds and 2 baths that has been on Estately for 5 days. 3173 3173a 21st Street is in the Southeast San Francisco neighborhood of San Francisco and has a WalkScore® of 99, making it a walker’s paradise. This multifamily is in the attendance area of George R. Moscone Elementary School and Herbert Hoover Middle School.

Listing Courtesy of: SFMLS and Urban Capital SF.

Based on information from the SFMLS 2025. All information provided is deemed reliable but is not guaranteed and should be independently verified. SFMLS, Estately and their affiliates provide the MLS and all content therein “AS IS” and without any warranty, express or implied. The information included in this listing is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The information on each listing is furnished by the owner and deemed reliable to the best of his/her knowledge, but should be verified by the purchaser SFMLS and Estately assume no responsibility for typographical errors, misprints or misinformation. This property is offered without respect to any protected classes in accordance with the law.