OFF MARKET

Off Market Jul 2021 for $1.4M

$1,623,096

•

1,619

sq ft

21 Decatur St #1, Cambridge, MA 02139

About this home

Architecturally stunning townhouse that was custom designed by Mark Boyes-Watson to the highest standards in 2011 in prime Cambridgeport neighborhood. Ideally located near MIT campus and biotech hub between Sidney St and Kendall Square. Sleek, modern kitchen equipped with top of the line JennAir appliances, cherry cabinetry, breakfast bar island, and designer lighting. Glass sliders off the dining area open up to a private deck. Spoil yourself with a luxurious master suite with cathedral ceilings, jacuzzi tub, extra-large windows, and spacious custom designed closets. Second bedroom suite has an en suite bath with glass enclosed shower. Basement is fully finished and offers a multi-purpose open space for lounging or exercise, and a separate room that can be used as an office. 1 off-street parking space. Rare townhouse that will exceed the expectations of most discerning buyers that aren't willing to compromise on their wishlist.

TownhomeProperty Type

2011Year Built

$1,003Est. Price/Sq.Ft.

1 spaceParking

Listed by Park Hou Group • Splice Realty

Bought with The Residential Group • William Raveis R.E. & Home Services

Redfin checked: a few seconds ago

•Source:MLS PIN #72841068

Redfin Estimate

$1,623,096

$218K since sold in July 2021$62K since July

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 18.7% higher than the average sale price ($1.37M) of 6 comparable homes.

SOLD JUL 10, 2026
$1,620,000
A
2 beds2 baths1,688 sq ft
118 Pearl St #2, Cambridge, MA 02139
SOLD MAY 29, 2026
$2,065,000
B
2 beds3.5 baths1,804 sq ft
17 Perry St #3, Cambridge, MA 02139
SOLD JUN 26, 2026
$1,015,000
C
2 beds2 baths1,208 sq ft
55 Magazine #54, Cambridge, MA 02139
SOLD JUL 9, 2026
$1,170,000
D
2 beds2 baths1,487 sq ft
178 Harvard St Unit 178A, Cambridge, MA 02139
SOLD BY REDFIN JUL 7, 2026
$1,225,000
E
2 beds2 baths1,234 sq ft
20 Corporal Mcternan St #104, Cambridge, MA 02139
SOLD JUN 18, 2026
$1,110,000
F
2 beds2 baths1,101 sq ft
14 Valentine St #2, Cambridge, MA 02139

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Earn from this home

Sell

$528,655

Est. take-home

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Rent

$3,782/mo

Redfin rental estimate

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Market trends in 02139, MA

Last updated July 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

104.0%

0.3% MoM

Median sale price

$1.1M

$195K MoM

Avg. days on market

22d

1 days MoM

Recently sold homes

21 MoM

New listings for sale

OPEN SAT, 11:30AM TO 1PM
$495,000
1 bed1 bath534 sq ft
51 Lopez St #4, Cambridge, MA 02139
$2,400,000
6 beds4 baths3,612 sq ft
14 Saint Paul St, Cambridge, MA 02139
$739,900
2 beds1 bath893 sq ft
277 River St #1, Cambridge, MA 02139
OPEN SUN, 2PM TO 3PM
$1,295,000
3 beds2 baths1,254 sq ft
20 Marie Ave #1, Cambridge, MA 02139
$759,000
2 beds1 bath760 sq ft
287 Harvard St #79, Cambridge, MA 02139
$790,900
2 beds1 bath810 sq ft
65 Howard St #2, Cambridge, MA 02139
See all

Provided by Redfin

Sale history for 21 Decatur St #1

Date

Event

Price

MLS PIN #72841068

Jul 13, 2021

Sold

$1,405,000

$868/sq ft

Jun 9, 2021

Contingent

—

Jun 2, 2021

Listed

$1,300,000

$803/sq ft

MLS PIN #71299161

Dec 5, 2011

Sold

$740,000

$457/sq ft

Oct 22, 2011

Contingent

—

Oct 12, 2011

Listed

$749,900

$463/sq ft

Stunning architect-designed, custom-built townhome of exceptional quality utilizing smart design in an outstanding C’Port location. 2 spacious, sunny bdrms w/ cathedral ceilings, expansive windows—& closets!—& magnificent en suite bths. Exceptional flr plan flows gracefully from sunny LR to granite & stainless kitchen, then to Dining Rm & priv deck. Fully ENERGY STAR compliant. A/C, W/D, Rinnai instant hot water. Elegant touches thruout. Prkng. Please join us Su 12:30-2 for our Grand Opening!

Year

Property tax

Land + Additions

Assessment*

2025

$9,313 (+7.7%)

$1,466,600

2024

$8,646 (+5.7%)

$1,460,500

2023

$8,176 (+10.4%)

$1,395,300

2022

$7,404 (+0.9%)

$1,250,700

2021

$7,335 (+6.2%)

$1,253,800

2020

$6,908 (+4.2%)

$1,201,400

2019

$6,629 (+2.7%)

$1,116,000

2018

$6,452 (+3.0%)

$1,025,800

2017

$6,265 (+4.2%)

$965,300

2016

$6,011 (+0.9%)

$859,900

2015

$5,960 (+1.3%)

$762,100

2014

$5,882 (+4.5%)

$701,900

2013

$5,627

$649,800

Tax history for 21 Decatur St #1

Year

Property tax

Land + Additions

Assessment*

2025

$9,313 (+7.7%)

$1,466,600

2024

$8,646 (+5.7%)

$1,460,500

2023

$8,176 (+10.4%)

$1,395,300

2022

$7,404 (+0.9%)

$1,250,700

2021

$7,335 (+6.2%)

$1,253,800

2020

$6,908 (+4.2%)

$1,201,400

2019

$6,629 (+2.7%)

$1,116,000

2018

$6,452 (+3.0%)

$1,025,800

2017

$6,265 (+4.2%)

$965,300

2016

$6,011 (+0.9%)

$859,900

2015

$5,960 (+1.3%)

$762,100

2014

$5,882 (+4.5%)

$701,900

2013

$5,627

$649,800

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Beds

Baths

2.5

Stories

Lot width

—

Lot depth

—

Lot size

—

Year renovated

—

Sq. Ft.

1,619

Year built

2011

Style

Townhouse

County

Middlesex County

APN

4867544

Parking Spaces

Basement

Yes

Accessible

HOA Dues

$209 /month

Garage

Features

—

Last updated by owner on Apr 12, 2024.

Property details

Parking

Parking Information
Parking Spaces: 1
Parking Features: Off Street

Interior

Master Bedroom Information
Level: Second

Bedroom #2 Information
Level: Second

Bathroom Information
# of Bathrooms (Full): 2
# of Bathrooms (Half): 1
Master Bathroom Features: Yes

Bathroom #1 Information
Level: First
Features: Bathroom - Half

Bathroom #2 Information
Level: Second
Features: Bathroom - Full

Bathroom #3 Information
Level: Second
Features: Bathroom - Full

Living Room Information
Level: First

Family Room Information
Level: Basement

Dining Room Information
Level: First

Kitchen Information
Level: First

Basement Information
Basement: Y

Laundry Information
Laundry Features: In Basement, In Unit

Interior Features
# of Rooms (Total): 7

Exterior

Building Information
Building Area (Total): 1,619
StructureType: Townhouse
Stories (Total): 3
Year Built Source: Public Records
Year Built Effective: 2011
Year Built Details: Actual

Property Information
PropertySubType: Condominium
Entry Level: 1
Entry Location: Unit Placement(Front)

Financial

Tax Information
Tax Annual Amount: $4,930.19
Tax Year: 2021

Utilities

Utility Information
Sewer: Public Sewer
Water Source: Public

Heating & Cooling
Has Heating
Has Cooling
Heating: Central, Natural Gas
Cooling: Central Air

Location

HOA Information
Association Fee: $209.31
Association Fee Frequency: Monthly
Association Fee Includes: Water, Sewer, Insurance, Maintenance Structure, Maintenance Grounds, Snow Removal

Location Information
Directions: Decatur Street between Pearl and Brookline Streets
UnparsedAddress: 21 Decatur Street # 1, Cambridge MA 02139

Community Information
Senior CommunityYN: No
Community Features: Public Transportation, T-Station, University

Public facts

Beds: 2
Baths: 2.5
Sq. Ft.: 1,619
Stories: 3.0
Parking Spaces: 1
Basement: Yes
Accessible: No
Lot Size: —
Style: Townhouse
Year Built: 2011
Year Renovated: —
County: Middlesex County
APN: 4867544
HOA Dues: $209/month
Garage: No
Features: —

Home facts updated by owner on Apr 12, 2024

Other

Miscellaneous Information
Heat Zones: 2

Listing Information
StandardStatus: Closed

Around this home

Schools

The Amigos School

Public PreK-8 • Assigned • 0.2mi

9/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

Despite new zoning laws encouraging housing production, Cambridge remains a Seller's market driven by pent-up demand and a constant influx of buyers. Because it is a historic, built-out city, there is little new housing to replace existing...
2 months ago • Cambridge
Benjamin Ginsburg
Redfin Premier agent
152 deals
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Climate risks

6/10 Flood Factor

Estimated 69-77% chance of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

6/10 Heat Factor

7 days above 96° expected this year, 15 days in 30 years

6/10 Wind Factor

64% chance of strong winds in next 30 years

3/10 Air Factor

3 unhealthy days expected this year, 3 days in 30 years

Provided by First Street

Historical weather

Cambridge, MA • 02139

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 9.2 hours in June and 4.4 hours in December, placing it below the U.S. average for solar exposure.

9.2 hrs

4.4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.54M – $1.87M

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New listings for sale in 02139

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51 Lopez St #4, Cambridge, MA 02139

$2,400,000

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14 Saint Paul St, Cambridge, MA 02139

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277 River St #1, Cambridge, MA 02139

OPEN SUN, 2PM TO 3PM

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20 Marie Ave #1, Cambridge, MA 02139

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Home values near 21 Decatur St #1

Data from public records.

Address	Redfin Estimate
24 Decatur St, Cambridge, MA 4 Beds \| 2.5 Baths \| 1973 Sq. Ft.	$2,109,082
21 Decatur St, Cambridge, MA 4 Beds \| 3.5 Baths \| 4325 Sq. Ft.	$3,357,132

Address	Redfin Estimate
13 Decatur St, Cambridge, MA 4 Beds \| 3.5 Baths \| 2812 Sq. Ft.	$2,389,889
25 Decatur St, Cambridge, MA 5 Beds \| 4 Baths \| 3522 Sq. Ft.	$2,389,593

Address	Redfin Estimate
17-19 Decatur St, Cambridge, MA 4 Beds \| 4.5 Baths \| 3305 Sq. Ft.	$2,078,226
20 Decatur St, Cambridge, MA 2 Beds \| 2.5 Baths \| 1175 Sq. Ft.	$1,547,386

Property information provided by MLS PIN when last listed in 2021. This data may not show owner updates. Learn more.

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