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Two-Unit Duplex with Rear Porches
For Sale
$1,099,000

9 South Street, Boston, MA 02130

The residence combines distinct living areas with tandem off-street parking and outdoor space at the rear.

Property Size2,227 SF
Price / SF$493.49
Days on Market9

Property Features for 9 South Street

General Information

Standard status Active
Size 2,227 SF
Total Parking Spaces 2
Property subtype Multi-family

Additional Details

Multifamily Units 2

Amenities

rear porches

Building Details

Year Built 1925
Buildings 1
Listing Agency: LAER Realty Partners
Listed By: The stevedoug.com Team
Source: Thecharlesrealty
Added: Sep 28 Changed: Oct 4 Last Checked: Oct 5 at 8:58PM

Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of LAER Realty Partners

Investment Insights

Based on property information with market context.

Built in 1925, this 2,227-square-foot duplex contains two residences. The first-floor unit has two bedrooms, a living room, and a dining room, with hardwood floors, original wood detailing, and beamed ceilings. The second unit spans two floors, with living and dining rooms plus three additional rooms on the third floor. Replacement windows and gas heating systems are in place, and rear porches provide outdoor space.

Two tandem off-street parking spaces are included. The property is directly across from Curtis Hall on South Street in Boston.

Key Highlights

  • Two‑family property with 2,227 square feet of living area
  • First‑floor unit has 2 bedrooms, living room, and dining room
  • Upper residence spans two floors and includes 3 rooms on the third floor

Financial Insights

Estimated NOI and Cap Rate

NOI / Yr
$56,275
Cap Rate
5.12%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$1,125,500 $1.1M
Cap Rate 7%
$803,929 $803.9K
Cap Rate 9%
$625,278 $625.3K
Market Conditions
NOI Build-Up for 2,227 SF
Gross rent
$84.2K $37.80/SF
− Vacancy
−$3.8K −$1.70/SF
EGI
$80.4K $36.10/SF
− OpEx
−$24.1K −$10.83/SF
NOI
$56.3K $25.27/SF
Area
Boston, MA
Vacancy
4.50%
Lease Rate
$37.80 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$1,125,500
Cap Rate 7%
$803,929
Cap Rate 9%
$625,278

Alternative Uses

Best Use
Multifamily LT 5
$803.9K
$703.4K – $937.9K (±1% cap)
NOI $56,275 @ 7.0% cap · market cap 5.12%
Second Best
Apartment 5plus
$747.4K
$654.0K – $872.0K (±1% cap)
NOI $52,317 @ 7.0% cap · market cap 4.76%
Theoretical Best
Office A
$1.67M
$1.46M – $1.95M (±1% cap)
NOI $116,730 @ 7.0% cap · market cap 10.62%
Zoning and permitted uses should be independently verified with authorities.

Property Analytics

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Current Use

Duplexes

Suggested Use

Top Pick Law Firm Pharmacy HVAC Service Big Box & Wholesale Store (Bike/Boat/Book/etc) Store Parking Lot & Garage

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Lease Details

2
Residential units

Location Intelligence

Trade Area within ½ mile

1,983
Businesses Nearby

Demographics for 02130, MA

38,284
Population
18,802
Households
2
Avg Household Size
36
Median Age
73%
College-Educated
94%
High-School Grad
3.5 sq mi
ZIP Area
10,938
Density / Sq Mi
$130,533
Median Household Income
$73,238
Median Earnings
$2,434
Median Rent
$763,700
Median Home Value
Check the figures for this property Cap Rate, Value Estimation, Potential NOI and more
View Realmo Analytics

Market

Vacancy Rate% for Multifamily in Northeast region

4% 2022
4.6% 2023
5.3% 2024
5.6% 2025
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Frequently Asked Questions

What type of property is this?
Duplex - The residence combines distinct living areas with tandem off-street parking and outdoor space at the rear.
Where is this duplex located?
The property is located at 9 South Street Boston, MA.
What is the asking price?
The asking price for this property is $1,099,000.
What are key features of this property?
This property features: Two‑family property with 2,227 square feet of living area; First‑floor unit has 2 bedrooms, living room, and dining room; Upper residence spans two floors and includes 3 rooms on the third floor
More about this property
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