401 W 4th St, Boston, MA 02127
MULTI_FAMILY - Boston, MA
- Added:
- Jun 9, 2026
- Days on Market:
- 7
- Last Refresh:
- Jun 15 at 5:06 am
Property Features for 401 W 4th St
General Information
- Property type
- Residential Multi Family
- Property subtype
- Other
- Property condition
- Under Construction
- Zoning
- R1
- Bedrooms
- 5
- Bathrooms
- 5
- Rooms
- Bedroom 3, Bathroom 2, Bedroom 2, Bathroom 3, Bedroom 4, Bedroom 5, Bathroom 5, Bedroom 1, Bathroom 1, Bathroom 4
- Standard status
- Active
- APN
- W:06 P:01094 S:000,1412683
- Size
- 2,795 SF
- Lot size
- 0.03 Acres
Taxes and HOA fees
- Tax Year
- 2025
- Tax Annual Amount
- 10222
Building Details
- Year built
- 1900
- Floors in Building
- 4
- Number of units
- 2
Listing agent Keller Williams (617) 969-9000
Listing office Keller Williams Realty 1340 Centre Street, Suite 202, Newton, MA (617) 969-9000
Listing date Jun 9, 2026
Copyright © 2026 MLS Property Information Network Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
HighLights
- Under construction; approved plans included to convert a single‑family into a 4‑floor two‑family
- Building currently offers 3 floors of living space with 4 bedrooms
- Partially finished walk‑out basement with tenants in place until August 2026
- Plans call for two duplex units with generous square footage
- By‑right FAR of 2.0 allows expanding the living area further
Overview
The property is zoned R1, and it sits on a relatively small site of 0.0342 acres. Tenants are in place, and the current occupancy is scheduled to continue until August 2026, which is an important consideration for timing a renovation or construction effort.
For buyers, the included approved plans are a practical advantage for anyone looking to reposition the property as a four-floor two-family. The existing configuration and partial basement finish may support interim operations while the project is prepared. Because the plans call for additional living space and take into account the by-right FAR, this offering is well suited for owners who want a defined development pathway rather than starting from scratch. Following completion, the buyer can evaluate whether to hold the improvements as rentals or pursue a condominium-style ownership approach, depending on their end-use goals.
Local 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 | $105.7k | $37.80 |
| − Vacancy | −$4.8k | −$1.70 |
| EGI | $100.9k | $36.10 |
| − OpEx | −$30.3k | −$10.83 |
| NOI | $70.6k | $25.27 |
Alternative Uses
Current Use by Public Records
Map
- City
- Boston
- County
- Suffolk
- State
- Massachusetts
- Longitude
- -71.048914
- Latitude
- 42.336133
