21 Harvard St # 4, Boston MA 02129
Boston, MA 02129 • Charlestown
$715,000
Est. $4,565/month
About this home
Tucked away in Charlestown’s City Square, this oversized one bedroom, one bathroom condo offers a rare blend of charm and modern updates. The bedroom features soaring ceilings and a charming loft, creating a flexible retreat perfect for additional storage, a reading nook, or a creative workspace. The freshly renovated bathroom is flooded with natural light. Open up the Juliette balcony skylight to enjoy fresh air and views, adding to the home's peaceful, tucked-away feel. Rich in character and thoughtfully updated, this one-of-a-kind residence offers the perfect balance of historic Charlestown charm and modern comfort.
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Recently Sold Nearby
Property History
Market Insights
13.3%
Price Range
1
Previous Sales
Property Timeline
Listed for Sale
Jul 28, 2026
$715,000
Original listing
Agent: Kerry D'Ambroise
Office: Columbus and Over Group, LLC
Previous Transaction - MLS #73292549
Full transaction history available when tracking began
Previously Sold
Nov 5, 2024
$620,000
MLS #73292549
| Date | Event | Price | Change | $/sqft | Details |
|---|---|---|---|---|---|
| 07/28/2026 | 🏠 Listed for Sale | $715,000 | - | - | Original listing |
| 11/05/2024 | 🏷️ Previously Sold | $620,000 | - | - | MLS #73292549 |
Tax History
| Year | Taxes | Assessment |
|---|---|---|
| 2025 | $6,515 | $562,600 |
Financial Details
Annual Property Tax
$6,515
Tax Year 2025
HOA Fee
$206
Monthly
Assessed Value
$562,600
Facts & Features
Home Facts
Type
Residential
Style
Condominium
Year Built
1899
Living Area
676 sq ft
Bedrooms
1
Full Baths
1
Total Rooms
3
Interior
Heating
Baseboard
Cooling
Window Unit(s)
Flooring
Wood
Appliances
None
Fireplace
None
Fireplaces
2
Basement
Y
Laundry
In Building
Features
None
Exterior
Construction
None
Architecture
None
Roof
None
Features
None
Pool
None
Spa
None
Fencing
None
Patio/Porch
None
Parking
Features
On Street
Utilities
Electric
None
Water
Public
Sewer
Public Sewer
Gas
None
Other
None
Financial
Annual Tax
$6,515
Assessed Value
$562,600
HOA & Community
HOA Fee
$206 Monthly
Fee Includes
Water, Sewer, Insurance
Amenities
None
Optional Fee Includes
None
Down Payment Resource
Eligible
MA Disclosures
Seller Disclosures
None
Additional Details
Possession
None
Accepted Financing
None
Structure Type
["Brownstone"]
Unit/Building
4
Sq Ft Source
Public Record
Documents
None
County
Suffolk
Total market time (incl. prior listings)
1 days
Property Overview
Property Type
Condominium
Listing Type
For Sale
Year Built
1899
Bedrooms
1
Full Bathrooms
1
Living Area
676 sq ft
Total Rooms
3
Stories
1
Entry Level
4
Floor Layout
Interactive room guide
Floor Layout
Finished Area
676 sq ft above grade
Display Options
Room Markers
BABathroom (4)
BRBedroom (5)
DDining (1)
KKitchen (1)
LLiving (2)
OOffice (1)
Conceptual diagram based on MLS room data. It is not to scale and is not a substitute for architectural plans or on-site measurements.
Interior Features
Flooring:
Wood
Appliances:
Interior Features:
Windows:
Basement:
Y
Laundry:
In Building
Security:
Construction & Materials
Year Built:
1899
Structure Type:
Brownstone
Exterior Materials:
Roof:
Foundation:
Stories:
1
Heating, Cooling & Utilities
Heating:
Baseboard
Cooling:
Window Unit(s)
Hot Water:
Water Source:
Public
Sewer:
Public Sewer
Energy Features:
Exterior & Lot
Exterior Features:
Patio & Porch:
Fencing:
Other Structures:
Lot Features:
Road Surface:
Parking & Garage
Parking Features:
On Street
Special Features
Fireplaces:
2
Fireplace Type:
Community Amenities:
Nearby Schools
School District
Boston School District local
C-
Where Graduates Go
Class of 2021
52%
attend college
38%
4-Year
14%
2-Year
7%
Out of State
7%
Working
School Safety
2024-25
3.7%
Above Average
3.2%
Suspensions
0.3%
In-School
0.5%
Emergency
1.8% below state avg
Elementary Schools
10 schools
A-
Warren-Prescott K-8 School
0.4 mi
|
#85 of 352
|
Score: 51.3
Improved 4 spots from last year
-7 below state avg
507 students
Diverse
Grades PK-08
C
Harvard-Kent Elementary School
0.4 mi
|
#589 of 824
|
Score: 41.5
Dropped 181 spots from last year
-16.7 below state avg
334 students
Very Diverse
Diverse Student Body
Grades PK-06
D
Horace Mann School for the Deaf Hard of Hearing
0.5 mi
|
#374 of 346
|
Score: 33.9
Same rank as last year
73 students
Diverse
Diverse Student Body
Grades PK-12
A
Eliot K-8 Innovation School
0.7 mi
|
#48 of 352
|
Score: 57.2
Improved 2 spots from last year
-1.1 below state avg
784 students
Diverse
Strong Attendance
Grades PK-08
St. John Elementary School
0.8 mi
Grades PK-08
Advent School
1.1 mi
Grades K-06
C+
Mario Umana Academy
1.2 mi
|
#11 of 16
|
Score: 26.9
Improved 333 spots from last year
-31.3 below state avg
634 students
Less Diverse
Rising School
Grades PK-08
East Boston Central Catholic School
1.2 mi
Grades PK-08
Park Street School
1.2 mi
Grades K-07
B+
Alighieri Dante Montessori School
1.3 mi
|
#5 of 12
|
Score: 45.3
Improved 124 spots from last year
-12.9 below state avg
109 students
Diverse
Rising School
Grades PK-06
Middle Schools
10 schools
Middle School Academy
2.8 mi
F
Higginson/Lewis K-8 School
3.8 mi
|
#349 of 352
|
Score: 23.6
Improved 3 spots from last year
-34.6 below state avg
213 students
Diverse
Grades 03-08
Nativity Prep School
4.0 mi
Grades 05-08
A
Uncommon Schools - Roxbury Preparatory Dorchester Campus Middle School
4.3 mi
|
#4 of 16
|
Score: 41.9
Improved 187 spots from last year
-16.3 below state avg
1,126 students
Diverse
Rising School
College Ready Curriculum
Grades 05-08
Dearborn Middle School
4.6 mi
Mother Caroline Academy
4.6 mi
Grades 05-08
Epiphany School
5.5 mi
Grades 05-08
C
Ohrenberger School
8.9 mi
|
#265 of 352
|
Score: 34.9
Improved 20 spots from last year
-23.3 below state avg
477 students
Diverse
Rising School
Diverse Student Body
Grades 03-08
Edwards Middle
0.5 mi
UP Academy
2.8 mi
High Schools
10 schools
D
Charlestown High School
0.6 mi
|
#322 of 346
|
Score: 31.0
Improved 49 spots from last year
-27.2 below state avg
754 students
Diverse
11 sports
• 488 athletes
Early College Program
Rising School
Grades 07-12
C-
East Boston High School
1.6 mi
|
#305 of 346
|
Score: 37.3
Improved 31 spots from last year
-20.9 below state avg
1,252 students
Less Diverse
14 sports
• 584 athletes
Early College Program
Rising School
Grades 07-12
Newman School
1.7 mi
Grades 07-12
C
Quincy Upper School
1.7 mi
|
#268 of 346
|
Score: 44.6
Improved 4 spots from last year
-13.6 below state avg
557 students
Very Diverse
12 sports
• 208 athletes
High Graduation Rate
Diverse Student Body
Grades 06-12
Cathedral High School
2.2 mi
9 sports
• 430 athletes
Grades 07-12
A+
Boston Latin School
3.1 mi
|
#19 of 346
|
Score: 73.3
Improved 61 spots from last year
+15.1 above state avg
2,424 students
Very Diverse
18 sports
• 2,006 athletes
Strong AP Program
High Graduation Rate
Rising School
Strong Athletics
Grades 07-12
A-
O'Bryant School of Math & Science
3.2 mi
|
#90 of 346
|
Score: 61.1
Improved 94 spots from last year
+2.9 above state avg
1,509 students
Very Diverse
High Graduation Rate
Rising School
College Ready Curriculum
Diverse Student Body
Grades 07-12
B
Dearborn STEM Academy
3.3 mi
|
#13 of 25
|
Score: 31.7
Improved 356 spots from last year
-26.6 below state avg
565 students
Diverse
10 sports
• 242 athletes
Early College Program
Rising School
Grades 07-12
C
Ruth Batson Academy
3.9 mi
|
#19 of 25
|
Score: 27.6
Improved 346 spots from last year
-30.6 below state avg
604 students
Diverse
8 sports
• 128 athletes
Early College Program
Rising School
Grades 07-12
A+
Boston Latin Academy
4.0 mi
|
#2 of 25
|
Score: 63.9
Improved 214 spots from last year
+5.7 above state avg
1,693 students
Very Diverse
17 sports
• 1,298 athletes
High Graduation Rate
Rising School
Strong Athletics
Diverse Student Body
Grades 07-12
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Down: $0
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Monthly Payment Breakdown
Principal & Interest
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Property Tax
$543
Homeowners Insurance
$200
HOA Fee
$206/mo
PMI (if <20% down)
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Payment Over Time
Year 1
95% Interest
Year 15
50/50
Year 30
95% Principal
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Location
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Neighborhood
Charlestown
21 Harvard St # 4, Boston MA 02129
Boston, MA 02129
Listing Information
Listing Agent
Kerry D'Ambroise
Listing Office
Columbus and Over Group, LLC
Office Phone
617-645-3407
Agent MLS ID
CN243501
Office MLS ID
AN1793
Listing Data Updated
Jul 29, 2026 3:30 AM EDT
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.
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