Last Sold Price
3 beds2.5 baths1,136 sqft$638/sqft
21 Decatur St, Unit 3, Cambridge, MA 02139

Property Details for 21 Decatur Street, Unit 3

Status
MLS #
-
Days on Market
-
Taxes
-
HOA Fees
-
Condo/Co-op Fees
-
Property Type
MLS Type
Condominium/Co-Op / Condo
Year Built
1873

Recent comparable sales

Median sold price

$880,000

Avg days on market

45

Sale-to-list ratio

92.3%

Cambridge, MA

9 comparable properties found

$870,150 | 26 Inman Street, Unit 1D, Cambridge, MA 02139
1/20
1

$870,150

Sold 07/10/25

3
Bedrooms
1,152
Square Feet
Unavailable
Acres
$880,000 | 213 Harvard Street, Unit 2, Cambridge, MA 02139
1/12
2

$880,000

Sold 07/08/25

3
Bedrooms
1,169
Square Feet
Unavailable
Acres
$737,000 | 960 Cambridge Street, Unit 3, Cambridge, MA 02141
1/32
3

$737,000

Sold 08/03/26

3
Bedrooms
960
Square Feet
Unavailable
Acres
a front view of a building with street view
1/13
4

$780,000

Sold 04/02/25

3
Bedrooms
1,108
Square Feet
Unavailable
Acres
$890,000 | 464 Windsor Street, Unit 3, Cambridge, MA 02141
1/34
5

$890,000

Sold 09/04/25

3
Bedrooms
1,210
Square Feet
Unavailable
Acres
$899,000 | 66 6th Street, Unit 2, Cambridge, MA 02141
1/18
6

$899,000

Sold 07/09/26

3
Bedrooms
1,190
Square Feet
Unavailable
Acres
7

$740,000

Sold 10/31/24

3
Bedrooms
2
Bathrooms
1,012
Square Feet
Unavailable
Acres
8

$1,790,000

Sold 11/12/25

3
Bedrooms
2.5
Bathrooms
1,187
Square Feet
Unavailable
Acres
9

$1,820,000

Sold 10/24/25

3
Bedrooms
2.5
Bathrooms
1,171
Square Feet
Unavailable
Acres

Location

Add your commute

Building Information for 21 Decatur Street, Unit 3

Building/Complex21 Decatur StFloor-Stories3Residences-Pet Policy-Pet Policy Details-Year Built1873

Payment Calculator

$4,454 per month

30 year fixed, 6.55% Interest

Principal and Interest

$3,685

Property Taxes

$769

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

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Property History for 21 Decatur Street, Unit 3

DateEvent & SourcePriceAppreciation
Nov 23, 2011

Sold (Public Record)

Public Record #320059854

$725,000
DateEvent & SourcePrice
11/23/2011

Sold (Public Record)

Public Record #320059854

$725,000

For completeness, we often displays two records for one sale: the MLS record and the public record.

Public Records for 21 Decatur Street, Unit 3

Taxable ValueLand-Additions$1,452,800Total-
Tax Record2025$9,225 ($769 / month)
Home Facts
Beds3Baths2.5Total Finished SqFt1,136 SqFtAbove Grade Finished SqFt1,136 SqFtUnfinished Basement SqFt546 SqFtStories3Lot Size4,105 SqFtStyleCondominiumYear Built1873Year Renovated1873CountyMIDDLESEXAPNCAMB M:00094 L:0014400003

Schools near 21 Decatur Street, Unit 3

This home is within Cambridge School District.
Rating
School
Type
Grades
Distance
Public - PK to 8
Public - 9 to 12
Public - PK to 5
Public - PK to 5
Rating
School
Distance
The Amigos School
PublicPK to 8

Cambridge Rindge and Latin School
Public9 to 12

Morse School
PublicPK to 5

Martin Luther King, Jr. School
PublicPK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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Nearby home values

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of any information, descriptions or measurements (including square footage measurements and property condition), such should be independently verified through appropriate means, including, but not limited to, in person inspection and public records, and Compass International Holdings, its subsidiaries, affiliates and independently owned and operated franchisees, and their affiliated agents and associated third parties expressly disclaim any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the seller's discretion. No financial or legal advice provided. Equal Housing Opportunity.

The property listing data and information, or the images, set forth herein were provided to MLS Property Information Network, Inc., Martha's Vineyard MLS, CCIMLS, Link MLS, and Berkshire County Board of REALTORS from third party sources, including sellers, lessors and public records, and were compiled by MLS Property Information Network, Inc., Martha's Vineyard MLS, CCIMLS, Link MLS, and Berkshire County Board of REALTORS. The property listing data and information, and the images, are for the personal, non-commercial use of consumers having a good faith interest in purchasing or leasing listed properties of the type displayed to them and may not be used for any purpose other than to identify prospective properties which such consumers may have a good faith interest in purchasing or leasing. MLS Property Information Network, Inc., Martha's Vineyard MLS, CCIMLS, Link MLS, and Berkshire County Board of REALTORS and its subscribers disclaim any and all representations and warranties as to the accuracy of the property listing data and information, or as to the accuracy of any of the images, set forth herein.