Two-Unit Duplex with Central
New
For Sale
$1,150,000
646-648 Madrid Street, San Francisco, CA 94112
MULTI_FAMILY - Contemporary - San Francisco, CA
Property Size1,400 SF
Lot Size0.06 Acres
Price / SF$821.43
Days on Market3
Property Features for 646-648 Madrid Street
General Information
Property type
Residential Multi Family
Property subtype
Duplex
Bedrooms
4
Rooms
Bedroom 1, Bedroom 2, Bedroom 4, Bedroom 3
Appliances
Free-Standing Refrigerator, Gas Cooktop
Lot features
Shape Regular, Shape Regular
View
City
Directions
travel down mission towards downtown, make a right turn on russia and then another right turn on madrid
Subdivision
SF District 10
Standard status
Active
APN
6275009
Size
1,400 SF
Lot size
0.06 Acres
Utilities
Utilities
Electricity Available
Sewer type
Public Sewer
Heating system
Central
Water source
Public
Building Details
Year built
1905
Floors in Building
2
Number of units
2
Flooring type
Parquet Wood
Architectural style
Contemporary
Listing Agency:
Century 21 Masters · Century 21 Real Estate
(415) 213-1600
Listed By:
Sunny S Lau · License #01348288
(415) 517-2828
Added: Jul 30
Last Checked: Aug 1 at 4:06AM
MLS# 426150662
Copyright © 2026 San Francisco Association of REALTORS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Investment Insights
Based on property information with market context.
Two-unit duplex in a contemporary architectural style built in 1905. Each unit is described as having two bedrooms and one bathroom, along with a spacious living room. The kitchen includes a dinette area and is positioned for natural light. Flooring is listed as parquet wood, and heating is central. Appliances include a free-standing refrigerator and a gas cooktop.
The top floor is tenant occupied and is subject to tenant rights. The lower level includes two bedrooms plus an additional room; one of the rooms is leased, and the listing indicates the whole lower level can be delivered vacant at COE. Outside, the property offers a large backyard. Storage is also available downstairs in the basement area, which is described as sloping down hill with uneven height.
The lot size is 0.0573 acres and the property size is 1,400 square feet. Water and sewer services are listed as public, and electricity is available. The address is 646-648 Madrid Street, San Francisco, CA 94112.
The top floor is tenant occupied and is subject to tenant rights. The lower level includes two bedrooms plus an additional room; one of the rooms is leased, and the listing indicates the whole lower level can be delivered vacant at COE. Outside, the property offers a large backyard. Storage is also available downstairs in the basement area, which is described as sloping down hill with uneven height.
The lot size is 0.0573 acres and the property size is 1,400 square feet. Water and sewer services are listed as public, and electricity is available. The address is 646-648 Madrid Street, San Francisco, CA 94112.
Key Highlights
- Two‑unit duplex; each unit described as 2 bedrooms and 1 bathroom
- Top floor tenant occupied and subject to tenant rights
- Lower level includes 2 bedrooms plus an additional room; whole lower level can be delivered vacant at COE
Financial Insights For Multifamily LT 5
Simulate Cap Rate and NOI
NOI Build-Up
- Vacancy
- income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
- EGI (Effective Gross Income)
- gross rent minus vacancy losses — the realistic income before paying operating costs.
- OpEx (Operating Expenses)
- recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
- NOI (Net Operating Income)
- income a property generates after operating costs but before financing and taxes.
| Component | $ | $/SF |
|---|---|---|
| Gross rent | $85.7k | $61.20 |
| − Vacancy | −$5.1k | −$3.66 |
| EGI | $80.6k | $57.54 |
| − OpEx | −$24.2k | −$17.26 |
| NOI | $56.4k | $40.28 |
1,400 SF · lease $61.20/SF/yr · vacancy 5.98% · expense 30.00%
Alternative Uses
Best Use
Multifamily LT 5
$805.6K
$704.9K – $939.8K
NOI $56,389 @ 7.0% cap · market cap 4.90%
Second Best
Apartment 5plus
$729.7K
$638.5K – $851.4K
NOI $51,081 @ 7.0% cap · market cap 4.44%
Theoretical Best
—
—
same as Best Use
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
Multi-tenant
Tenancy
Location Intelligence
Trade Area within ½ mile
1,831
Businesses Nearby
Explore this area
Business Placement
Demographics for 94112, CA
79,314
Population
24,530
Households
3.2
Avg Household Size
42
Median Age
36%
College-Educated
80%
High-School Grad
3.3 sq mi
ZIP Area
24,035
Density / Sq Mi
$130,906
Median Household Income
$55,744
Median Earnings
$2,326
Median Rent
$1,159,600
Median Home Value
Market
Vacancy Rate% for Multifamily in West region
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Duplex - Two-unit duplex featuring central heating, public utilities, and a large backyard plus basement storage area.
Where is this duplex located?
The property is located at 646-648 Madrid Street San Francisco, CA.
What is the asking price?
The asking price for this property is $1,150,000.
What are key features of this property?
This property features: Two‑unit duplex; each unit described as 2 bedrooms and 1 bathroom; Top floor tenant occupied and subject to tenant rights; Lower level includes 2 bedrooms plus an additional room; whole lower level can be delivered vacant at COE
