20 Tierney St, Unit 3

908 Sq. Ft.
$920 / Sq. Ft.
908
Sq. Ft.
$920
per Sq. Ft.

Description

Perched on the third floor atop Observatory Hill, this bright 2 BD, 1 BA floor-through residence blends comfort and modern convenience in a prime location. Sweeping sunset views over Cambridge and Danehy Park are paired with a private tree-top deck, hardwood floors, efficient AC and in-unit laundry. The open layout flows from a corner living room with bay window and dual exposures into the dining area and expansive kitchen with breakfast bar and stainless appliances. Both of the spacious, south-facing...Perched on the third floor atop Observatory Hill, this bright 2 BD, 1 BA floor-through residence blends comfort and modern convenience in a prime location. Sweeping sunset views over Cambridge and Danehy Park are paired with a private tree-top deck, hardwood floors, efficient AC and in-unit laundry. The open layout flows from a corner living room with bay window and dual exposures into the dining area and expansive kitchen with breakfast bar and stainless appliances. Both of the spacious, south-facing bedrooms are bathed in natural light. Recent updates include 2024 mini-split systems, replacement windows, exterior insulation and refreshed 2026 bathroom. Basement storage and off-street parking add everyday ease. Ideally positioned between Harvard Sq, Porter Sq, Fresh Pond, and Huron Village, just moments from local favorites like Imagine and Formaggio Kitchen. Convenient access to bus lines and Red Line service offers easy connectivity across Cambridge and beyond.

Listing Agents

  1. Nick Schmalensee

    Nick Schmalensee

    Alternative Listing Agent

    Compass

    nick.hs@compass.com

    P: (617)-838-9852

Property Details for 20 Tierney Street, Unit 3

Town
Cambridge
MLS Area
Neighborhood 9
Area
MA-Cambridge
Style
2/3 Family
Garage Spaces
0
Open Parking Spaces
1.00
Parking Spaces Total
1
Unit Placement
Top/Penthouse
LISTING UPDATED: 03/18/2026 08:37 AM

Property Details for 20 Tierney Street, Unit 3

StatusContingent
MLS #73485035
Days on Market7
Taxes$1,389 / year
HOA Fees$240 / month
Compass TypeCondo
MLS TypeCondominium/Co-Op / Condo
Year Built1885
CountyMiddlesex County
Add your commute

Building Information for 20 Tierney Street, Unit 3

Building/Complex20 Tierney Street CondominiumFloor3Stories1Residences3Pet PolicyAllowedPet Policy DetailsPets AllowedYear Built1885

Payment Calculator

$4,408 per month

30 year fixed, 6.11% Interest

Principal and Interest

$4,052

Property Taxes

$116

HOA Dues

$240

The Payment Calculator is for illustrative purposes only.

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Property Information for 20 Tierney Street, Unit 3

General Details
Property Details
  • Building Area Units: Square Feet
  • Community Features: Public Transportation, Shopping, Tennis Court, Park, Walk/Jog Trails, Golf Course, Medical Facility, Bike Path, Highway Access, House of Worship, Private School, Public School, T-Station, University
  • Living Area: 908.0
  • SqFt with Basement: No
  • Total Units: 3
  • Type of Condo: Condo
  • Waterfront: No
  • Year Built Details: Approximate
  • Year Converted: 1999
  • Year Built Source: Public Records
Features
Interior Features
  • Appliances: Range, Dishwasher, Disposal, Microwave, Refrigerator, Washer, Dryer
  • Basement Features: Y
  • Common Walls: Top/Penthouse
  • Num of Baths: 1.0
  • Num of Full Baths: 1
  • Num of Half Baths: 0
  • Bathrooms Total Decimal: 1.00
  • Bathrooms Total Integer: 1
  • FireplaceYN: No
  • Fireplaces: 0
  • Flooring: Tile, Hardwood
  • Laundry Features: In Unit, Electric Dryer Hookup, Washer Hookup
  • SpaYN: No
  • Window Features: Insulated Windows
Exterior Features
  • Construction: Frame
  • Exterior Features: Deck
  • Exterior Features: Deck
  • Patio And Porch Features: Deck
  • Roof Material: Rubber
  • Structure Type: 2/3 Family
Parking Features
  • Covered Spaces: .00
  • Garage: No
  • Garage Parking: Off-Street, Improved Driveway
  • Open Parking: Yes
  • Parking Features: Off-Street, Improved Driveway
  • Parking Features: Off-Street, Improved Driveway
Utilities
  • Cooling: Ductless Mini-Split System
  • Cooling: Yes
  • Electric: Circuit Breakers
  • Heating: Forced Air, Natural Gas, Ductless
  • Heating: Yes
  • Sewer: City/Town Sewer
  • Utility Connections: for Gas Range, for Electric Dryer, Washer Hookup
  • Water: Public
Property Information
Property Info
  • Documents Available: Master Deed, Unit Deed, Management Association Bylaws, Floor Plans
  • Documents Count: 4
  • Farm Land Area Units: Square Feet
  • WARRANTY: No
  • Lot Size Units: Acres
  • Disclosures: Taxes reflect a residential exemption. Per condo docs,Unit 3 has access to one off street parking spot from 5/1 to 12/31 (8 months).
Tax Information
  • Tax ID: 416635
  • Assessments: $715,300
  • Book: 82605
  • Tax Year: 2026
  • Zoning: res
Building / Association Information
Living Characteristics
  • Beds Total: 2
  • Total Living Levels: 1
Other Building Characteristics
  • Cooling Zones: 3
  • Heat Zones: 1
Complex & Association Information
  • Association Fee Frequency: Monthly
  • Association Fee Includes: Water, Sewer, Insurance, Maintenance Grounds
  • Complex Name: 20 Tierney Street Condominium
  • Management: Owner Association
  • Adult Community: No
Unit Information
Unit Information
  • Unit Building: 3
  • Unit Floor Level Integer: 3.0

Property History for 20 Tierney Street, Unit 3

DateEvent & SourcePriceAppreciation
Mar 17, 2026

Contingent

MLS PIN #73485035

—
Mar 11, 2026

Listed (Active)

MLS PIN #73485035

$835,000—
Mar 27, 2024

Sold (Public Record)

Public Record #1529750064

$770,000

+4.7% / yr

Mar 27, 2024

Sold

MLS PIN #73207704

$770,000—
Mar 5, 2024

Under Agreement

MLS PIN #73207704

—
Mar 2, 2024

Contingent

MLS PIN #73207704

—
Mar 1, 2024

Listed (Active)

MLS PIN #73207704

$770,000—
Nov 21, 2023

Canceled

MLS PIN #73156265

$799,000—
Sep 6, 2023

Listed (Active)

MLS PIN #73156265

$825,000—
Aug 1, 2023

Expired

New England Real Estate Network #4947653

—
Jul 31, 2023

Expired

MLS PIN #73095178

$839,900—
Jul 13, 2023

Price Change

New England Real Estate Network #4947653

$839,900—
May 16, 2023

Price Change

MLS PIN #73095178

$849,900—
May 16, 2023

Price Change

New England Real Estate Network #4947653

$849,900—
Apr 5, 2023

Listed (Active)

MLS PIN #73095178

$899,900—
Apr 5, 2023

Listed (Active)

New England Real Estate Network #4947653

$899,900—
Nov 3, 1999

Sold (Public Record)

Public Record #87677585

$250,000—
DateEvent & SourcePrice
03/17/2026

Contingent

MLS PIN #73485035

—
03/11/2026

Listed (Active)

MLS PIN #73485035

$835,000
03/27/2024

Sold (Public Record)

Public Record #1529750064

$770,000

+4.7% / yr

03/27/2024

Sold

MLS PIN #73207704

$770,000
03/05/2024

Under Agreement

MLS PIN #73207704

—
03/02/2024

Contingent

MLS PIN #73207704

—
03/01/2024

Listed (Active)

MLS PIN #73207704

$770,000
11/21/2023

Canceled

MLS PIN #73156265

$799,000
09/06/2023

Listed (Active)

MLS PIN #73156265

$825,000
08/01/2023

Expired

New England Real Estate Network #4947653

—
07/31/2023

Expired

MLS PIN #73095178

$839,900
07/13/2023

Price Change

New England Real Estate Network #4947653

$839,900
05/16/2023

Price Change

MLS PIN #73095178

$849,900
05/16/2023

Price Change

New England Real Estate Network #4947653

$849,900
04/05/2023

Listed (Active)

MLS PIN #73095178

$899,900
04/05/2023

Listed (Active)

New England Real Estate Network #4947653

$899,900
11/03/1999

Sold (Public Record)

Public Record #87677585

$250,000

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

Public Records for 20 Tierney Street, Unit 3

Taxable ValueLand-Additions$639,800Total-
Tax Record2025$4,063 ($339 / month)
Home Facts
Beds2Baths1Total Finished SqFt908 SqFtAbove Grade Finished SqFt908 SqFtStories1StyleCondominiumYear Built1885ZoningBCountyMIDDLESEXAPNCAMB M:00229 L:0013400003

Schools near 20 Tierney Street, Unit 3

This home is within Cambridge School District.
Rating
School
Type
Grades
Distance
Public - PK to 5
Public - 6 to 8
Public - 9 to 12
Public - PK to 5
Rating
School
Distance
Graham and Parks School
PublicPK to 5

Vassal Lane Upper School
Public6 to 8

Cambridge Rindge and Latin School
Public9 to 12

John M. Tobin Montessori 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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No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims 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 discretion of the seller. 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.