Active
150 Days on market
6 Mercer Circle Cambridge — Photo 1 of 37

6 Mercer Circle Cambridge — Photo 1 of 37

Recent Drop: $700,000

$5,500,000
$4,800,000

$4,800,000

Investment Analysis — 6 Mercer Circle

Cambridge, MA 02138 — West Cambridge

Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 4-bedroom in 02138 carries an estimated $5,600/mo in gross rent — about a 0.44% cap rate and $21,266/yr in estimated NOI at the $4,800,000 list price. Adjust every assumption in the calculator below.

View Standard Listing

Beds

4

Baths

4

SqFt

4,292

Style

Single Family

Built

1885

Tucked along one of the most sought-after streets in West Cambridge, between Harvard Square & the Charles River, this beautifully proportioned home blends historic character with everyday convenience. Mercer Circle, originally called Telephone Street, is part of a storied enclave developed by Gardiner G. Hubbard, founder of the National Geographic Society and 1st president of Bell Telephone Company. The property showcases a 29' covered wrap-around porch overlooking specimen plantings. Inside, gracious rooms are defined by tall windows & ceilings, fireplaces, and custom built-ins. Outside, the irrigated fruit gardens yield plums, blueberries, apples, and vegetables. Ideally located just 0.2 miles from BB&N’s Lower and Middle Schools and approximately one mile from Shady Hill School & BB&N’s Upper School. Properties on Mercer Circle are rarely offered, as residents tend to stay for generations, drawn by the tranquil setting, community, & enduring curb appeal.

ADU Potential

Massachusetts allows one accessory dwelling unit by right in single-family zoning districts statewide (M.G.L. c. 40A §3; 760 CMR 71.00, effective Feb 2025). Estimated maximum ADU size for this property: 900 sq ft (the lesser of 900 sq ft or half the 4,292 sq ft principal dwelling). Lot size: 9,454 sq ft.

Based on listing data, which indicates the property type — not the zoning district. Local dimensional, septic (Title 5), and historic-district requirements still apply. Not legal advice — verify with the municipality.

Estimates — not financial advice

These figures are illustrative estimates for informational purposes only — not an appraisal, valuation, or guarantee of rent, income, or returns, and not financial, tax, or investment advice. Rent is either the figure reported on the MLS listing — in-place rent that may differ from market and is not verified against the actual leases — or, where the listing reports none, an estimate from HUD Small Area Fair Market Rents, a government benchmark that may differ from actual market rent. Each figure is labelled with its source. Cap rate, NOI, and returns depend on the assumptions shown, which you can change. MLS and other third-party data may be inaccurate or out of date. Verify all figures independently and consult your own financial, tax, and legal advisors before making any investment decision.

Property Details

Financials

Original Price$5,500,000
Annual Taxes$29,805.79

Parking

Garage0
Off-Street2

Interior Specifications

Total Rooms13
Fireplaces2
Flooring--
BasementFull, Partially Finished, Walk-Out Access, Interior Entry

Climate & Utilities

HeatingForced Air, Natural Gas
CoolingCentral Air, Whole House Fan
WaterPublic
SewerPublic Sewer

Building & Exterior

Construction--
Roof--
FoundationStone, Brick/Mortar
Zoningres

Property & Lot

Acres0.22
SqFt Lot9,454
Lot FeaturesCorner Lot

Neighborhood

Public Transportation • Shopping • Tennis Court(s) • Park • Walk/Jog Trails • Medical Facility

Geography

Floorplan Breakdown

Structural Layout

Third
Bedroom 3Bedroom 4
Second
OfficeMaster BedroomBedroom 2
First
Living RoomDining RoomKitchen
Living Room
Lvl First
Dining Room
Lvl First
Kitchen
Lvl First
Office
Lvl Second
Master Bedroom
Lvl Second
Bedroom 2
Lvl Second
Bedroom 3
Lvl Third
Bedroom 4
Lvl Third

Property History

Price Drop
$4,800,000

Was $5,500,000

May 26, 2026

MLS® 73502038

Listed
$5,500,000

Apr 15, 2026

MLS® 73502038

Listing Provided By

Listing Agent: Gail Roberts, Ed Feijo & Team

Listing Office: Coldwell Banker Realty - Cambridge

MLS® Number: 73502038