For sale

Price cut: $700K (5/26)

$4,800,000

6 Mercer Cir, Cambridge, MA 02138

4beds

4,292sqft

$29,200/mo

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Single Family Residence

Built in 1885

9,454 Square Feet Lot

$4,623,900 Zestimate^®

$1,118/sqft

$-- HOA

What's special

Custom built-ins

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.

127 days

1,255

32

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 4
Bathrooms: 5
Full bathrooms: 3
1/2 bathrooms: 2

Primary bedroom

Level: Second

Bedroom 2

Level: Second

Bedroom 3

Level: Third

Bedroom 4

Level: Third

Primary bathroom

Features: Yes

Dining room

Level: First

Kitchen

Level: First

Living room

Level: First

Office

Level: Second

Heating

Forced Air, Natural Gas

Cooling

Central Air, Whole House Fan

Appliances

Laundry: First Floor

Features

Office, Exercise Room, Library, Vestibule
Basement: Full,Partially Finished,Walk-Out Access,Interior Entry
Number of fireplaces: 2

Interior area

Total structure area: 4,292
Total interior livable area: 4,292 sqft
Finished area above ground: 3,690
Finished area below ground: 602

Property

Parking

Total spaces: 2
Parking features: Off Street, Paved
Uncovered spaces: 2

Features

Patio & porch: Porch
Exterior features: Porch, Rain Gutters, Professional Landscaping, Sprinkler System, Fruit Trees, Garden

Lot

Size: 9,454 Square Feet
Features: Corner Lot

Details

Parcel number: 416049
Zoning: res

Construction

Type & style

Home type: SingleFamily
Architectural style: Colonial
Property subtype: Single Family Residence

Materials

Foundation: Stone, Brick/Mortar

Condition

Year built: 1885

Utilities & green energy

Sewer: Public Sewer
Water: Public

Community & HOA

Community

Features: Public Transportation, Shopping, Tennis Court(s), Park, Walk/Jog Trails, Medical Facility, Bike Path, Conservation Area, Highway Access, House of Worship, Marina, Private School, Public School, T-Station, University

HOA

Has HOA: No

Location

Region: Cambridge

Financial & listing details

Price per square foot: $1,118/sqft
Tax assessed value: $4,851,600
Annual tax amount: $29,805
Date on market: 4/15/2026
Road surface type: Paved

Estimated market value

$4,623,900

$4.39M - $4.86M

$7,958/mo

Price history

Date	Event	Price
5/26/2026	Price change	$4,800,000-12.7%$1,118/sqft
Source: MLS PIN #73502038 Report a problem
4/15/2026	Listed for sale	$5,500,000$1,281/sqft
Source: MLS PIN #73502038 Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$30,220 +9.8%	$4,759,000 +2.4%
2024	$27,519 +7.5%	$4,648,500 +6.4%
2023	$25,597 +9.9%	$4,368,100 +11.1%
2022	$23,283 +6.6%	$3,932,900 +5.3%
2021	$21,842 +6.7%	$3,733,600 +4.9%
2020	$20,470 +11.6%	$3,560,000 +15.3%
2019	$18,345 -3.6%	$3,088,300 +2.1%
2018	$19,025 +2.4%	$3,024,600 +5.6%
2017	$18,588 +7%	$2,864,100 +15.2%
2016	$17,373 -0.4%	$2,485,400 +11.4%
2015	$17,449 -4.6%	$2,231,300 +2.3%
2014	$18,282 -3.1%	$2,181,600 +0.2%
2013	$18,863 +8.6%	$2,178,200 +6.3%
2012	$17,370 +3%	$2,048,400 -0.8%
2011	$16,856 +0.1%	$2,065,700 -5.3%
2010	$16,833 +3.6%	$2,180,500 +1.4%
2009	$16,249 +2.8%	$2,149,400 +0%
2008	$15,813 -2.5%	$2,148,500 -0.9%
2007	$16,214 +0.8%	$2,167,600 -0.5%
2006	$16,083 -3.2%	$2,179,300 +2%
2005	$16,615 +6.6%	$2,135,600 +4.5%
2004	$15,586 +15.6%	$2,042,700 +10%
2003	$13,482 +12.6%	$1,857,000 +12%
2002	$11,971 +2.2%	$1,658,000 +36.4%
2000	$11,716	$1,215,400 +10%
1999	--	$1,104,900