21 Tremont St # A, Boston MA 02129
Boston, MA 02129 • Charlestown
$699,000
$635,000
Est. $4,012/month
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About this home
Located just off Monument Square, this oversized 1 Bed/1 Bath home boasts a coveted corner exposure and exceptional natural light throughout. The thoughtfully renovated kitchen features granite countertops, stainless appliances with gas cooking and is open to an elegant dining room with exposed brick wall, perfect for entertaining. The spacious living room with beautiful crown moldings, ceiling medallion and oversized windows overlooks the shared garden, while french doors lead to the spacious bedroom with sunny corner exposure and double closets. The recently renovated bathroom offers a walk-in shower and sleek floating vanity. Additional highlights include high ceilings, Brazilian cherry hardwood floors throughout, on-site laundry, and extra basement storage with exterior access. A fantastic opportunity to own a beautifully appointed home in a prime location.
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Recently Sold Nearby
Property History
Market Insights
Property Timeline
Status: Active under contract
Jun 27, 2026
Active → Active Under Contract
Pending Sale
Jun 26, 2026
Offer accepted, sale pending
Listed for Sale
Apr 9, 2026
$699,000
Original listing
Agent: Phillip MacArthur
Office: Windrift Real Estate, LLC
| Date | Event | Price | Change | $/sqft | Details |
|---|---|---|---|---|---|
| 06/27/2026 | 📋 Status: Active under contract | - | - | - | Active → Active Under Contract |
| 06/26/2026 | ⏳ Pending Sale | - | - | - | Offer accepted, sale pending |
| 04/09/2026 | 🏠 Listed for Sale | $699,000 | - | - | Original listing |
Tax History
| Year | Taxes | Assessment |
|---|---|---|
| 2026 | $2,941 | $586,900 |
Financial Details
Annual Property Tax
$2,941
Tax Year 2026
HOA Fee
$356
Monthly
Assessed Value
$586,900
Facts & Features
Home Facts
Type
Residential
Style
Condominium
Year Built
1860
Living Area
681 sq ft
Bedrooms
1
Full Baths
1
Total Rooms
4
Interior
Heating
Baseboard
Cooling
Window Unit(s)
Flooring
Hardwood
Appliances
Range, Dishwasher, Refrigerator, Freezer
Fireplace
None
Basement
Y
Laundry
In Building
Features
None
Exterior
Construction
Frame
Architecture
None
Roof
Shingle
Features
Patio, Fenced Yard, Garden
Pool
None
Spa
None
Fencing
Fenced
Patio/Porch
Patio
Parking
Features
On Street
Utilities
Electric
None
Water
Public
Sewer
Public Sewer
Gas
None
Other
None
Financial
Annual Tax
$2,941
Assessed Value
$586,900
HOA & Community
HOA Fee
$356 Monthly
Fee Includes
Heat, Water, Sewer, Insurance
Amenities
None
Optional Fee Includes
None
Down Payment Resource
Eligible
Pets
Yes
MA Disclosures
Seller Disclosures
Tenant Has Agreed To Move Out 45 Days From An Accepted Offer. Taxes Include Residential Exemption.
Additional Details
Possession
None
Accepted Financing
None
Structure Type
["Detached"]
Unit/Building
A
Sq Ft Source
Master Deed
Documents
None
County
Suffolk
Total market time (incl. prior listings)
87 days
Property Overview
Property Type
Condominium
Listing Type
Sale Pending
Year Built
1860
Bedrooms
1
Full Bathrooms
1
Living Area
681 sq ft
Total Rooms
4
Stories
1
Entry Level
1
Floor Layout
Interactive room guide
Floor Layout
Finished Area
681 sq ft above grade
Display Options
Outdoor Areas
Patio & porchPatio
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:
Hardwood
Appliances:
Range, Dishwasher, Refrigerator, Freezer
Interior Features:
Windows:
Basement:
Y
Laundry:
In Building
Security:
Construction & Materials
Year Built:
1860
Effective Year (Renovated):
1984
Structure Type:
Detached
Exterior Materials:
Frame
Roof:
Shingle
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, Fenced Yard, Garden
Patio & Porch:
Patio
Fencing:
Fenced
Other Structures:
Lot Features:
Road Surface:
Parking & Garage
Parking Features:
On Street
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
C
Harvard-Kent Elementary School
< 0.1 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
A-
Warren-Prescott K-8 School
0.3 mi
|
#85 of 352
|
Score: 51.3
Improved 4 spots from last year
-7 below state avg
507 students
Diverse
Grades PK-08
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
0.8 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
C+
Mario Umana Academy
0.9 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
St. John Elementary School
0.9 mi
Grades PK-08
East Boston Central Catholic School
1.0 mi
Grades PK-08
D
O'Donnell Elementary School
1.1 mi
|
#777 of 824
|
Score: 30.7
Dropped 52 spots from last year
-27.5 below state avg
256 students
Less Diverse
Grades PK-06
B+
Alighieri Dante Montessori School
1.1 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
C-
Kennedy Patrick J Elementary School
1.2 mi
|
#670 of 824
|
Score: 37.5
Improved 47 spots from last year
-20.7 below state avg
279 students
Less Diverse
Rising School
Grades PK-06
Middle Schools
10 schools
Middle School Academy
3.0 mi
F
Higginson/Lewis K-8 School
4.1 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
4.4 mi
Grades 05-08
A
Uncommon Schools - Roxbury Preparatory Dorchester Campus Middle School
4.6 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
4.9 mi
Mother Caroline Academy
4.9 mi
Grades 05-08
Epiphany School
5.8 mi
Grades 05-08
C
Ohrenberger School
9.2 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
3.0 mi
High Schools
10 schools
D
Charlestown High School
0.3 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
1.3 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
C
Quincy Upper School
2.0 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
Newman School
2.1 mi
Grades 07-12
Cathedral High School
2.5 mi
9 sports
• 430 athletes
Grades 07-12
A+
Boston Latin School
3.4 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
3.5 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
3.6 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
4.1 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
4.4 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
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Property Tax
$245
Homeowners Insurance
$200
HOA Fee
$356/mo
PMI (if <20% down)
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Loan Summary
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95% Interest
Year 15
50/50
Year 30
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Location
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Neighborhood
Charlestown
21 Tremont St # A, Boston MA 02129
Boston, MA 02129
Listing Information
Listing Agent
Phillip MacArthur
Listing Office
Windrift Real Estate, LLC
Office Phone
978-999-2714
Agent MLS ID
CT009553
Office MLS ID
AN8933
Listing Data Updated
Jul 14, 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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