401 W 4th St, Boston MA 02127
Boston, MA 02127 • South Boston
$1,199,000
Est. $7,115/month
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About this home
Amazing opportunity to develop a single family to a 4 floor two family with approved plans included in the sale. The building currently features 3 floors of living space, 4 bedrooms, and a partially finished walk out basement with tenants in place until August 2026. The plans have both units being coveted duplexes with generous square footage and the ability to extend the living area even further by maximizing the by right FAR of 2.0. Buyer has the ability to flip as condos or hold for great rental returns.
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Recently Sold Nearby
Property History
Property Timeline
Listed for Sale
Aug 13, 2026
$1,199,000
Original listing
Agent: Calder Billings
Office: Keller Williams Realty
| Date | Event | Price | Change | $/sqft | Details |
|---|---|---|---|---|---|
| 08/13/2026 | 🏠 Listed for Sale | $1,199,000 | - | - | Original listing |
Tax History
| Year | Taxes | Assessment |
|---|---|---|
| 2025 | $10,222 | $882,700 |
Financial Details
Annual Property Tax
$10,222
Tax Year 2025
Assessed Value
$882,700
Facts & Features
Home Facts
Type
Residential
Style
Single Family Residence
Year Built
1900
Living Area
2,795 sq ft
Lot Size
0.03 acres
Bedrooms
5
Full Baths
5
Total Rooms
11
Interior
Heating
Hot Water, Natural Gas
Cooling
None
Flooring
Hardwood
Appliances
Gas Water Heater
Fireplace
None
Basement
Partially Finished
Laundry
None
Features
None
Exterior
Construction
None
Architecture
Contemporary
Roof
Shingle, Rubber
Features
Porch - Enclosed, Patio
Pool
None
Spa
None
Fencing
None
Patio/Porch
Porch - Enclosed, Patio
Parking
Features
None
Utilities
Electric
None
Water
Public
Sewer
Public Sewer
Gas
None
Other
None
Financial
Annual Tax
$10,222
Assessed Value
$882,700
HOA & Community
Fee Includes
None
Amenities
None
Optional Fee Includes
None
MA Disclosures
Lead Paint
Unknown
Seller Disclosures
Currently Is A 4 Bedroom/2 Bathroom Single Family. Approved Plans Included In Sale To Convert To A 2795sqft Two-family. Current Lease Is Until 8/31/26 For $5, 000/month. Plans Could Be Edited To Maximize By Right Far Of 2.0.
Additional Details
Possession
None
Accepted Financing
None
Structure Type
[]
Sq Ft Source
Owner
Sq Ft Disclosures
FAR not Maximized. Buyer to do own due diligence to increase FAR to 2.0 by right amount.
Documents
None
County
Suffolk
Total market time (incl. prior listings)
61 days
Property Overview
Property Type
Single Family Residence
Listing Type
For Sale
Year Built
1900
Bedrooms
5
Full Bathrooms
5
Living Area
2,795 sq ft
Total Rooms
11
Floor Layout
Interactive room guide
Floor Layout
Finished Area
2,222 sq ft above grade
573 sq ft below grade
Display Options
Outdoor Areas
Patio & porchPorch - Enclosed, Patio
Room Markers
BABathroom (4)
BRBedroom (5)
DDining (1)
KKitchen (1)
LLiving (2)
OOffice (1)
Conceptual diagram based on MLS room data. It is not to scale and is not a substitute for architectural plans or on-site measurements.
Interior Features
Flooring:
Hardwood
Appliances:
Gas Water Heater
Interior Features:
Windows:
Basement:
Partially Finished
Laundry:
Security:
Construction & Materials
Style:
Contemporary
Year Built:
1900
Structure Type:
Exterior Materials:
Roof:
Shingle, Rubber
Foundation:
Other
Heating, Cooling & Utilities
Heating:
Hot Water, Natural Gas
Cooling:
None
Hot Water:
Water Source:
Public
Sewer:
Public Sewer
Energy Features:
Exterior & Lot
Exterior Features:
Porch - Enclosed, Patio
Patio & Porch:
Porch - Enclosed, Patio
Fencing:
Other Structures:
Lot Features:
Road Surface:
Parking & Garage
Parking Features:
Special Features
View:
Yes
View Type:
City View(s)
Community Amenities:
Nearby Schools
School information not available for this location.
Monthly Payment Calculator
Monthly Payment
$0
Principal, interest, taxes & insurance
Loan Amount
$0
After down payment
Total Interest
$0
Over life of loan
Total Cost
$0
Including down payment
%
Down: $0
%
Monthly Payment Breakdown
Principal & Interest
$0
Property Tax
$852
Homeowners Insurance
$200
PMI (if <20% down)
$0
Loan Summary
Total of 360 payments
$0
Total principal paid
$0
Total interest paid
$0
Rate Impact
-0.5% Rate
$0/mo
Save $0/mo
Current Rate
$0/mo
+0.5% Rate
$0/mo
Cost $0/mo
Payment Over Time
Year 1
95% Interest
Year 15
50/50
Year 30
95% Principal
* Estimates only. Actual payments may vary. Consult with a lender for accurate figures.
Location
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Neighborhood
South Boston
401 W 4th St, Boston MA 02127
Boston, MA 02127
Listing Information
Listing Agent
Calder Billings
Listing Office
Keller Williams Realty
Office Phone
617-969-9000
Agent MLS ID
CN217368
Office MLS ID
BB5962
Listing Data Updated
Aug 13, 2026 3:16 PM EDT
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.
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