300 Commercial Street # 512, Boston MA 02109
Boston, MA 02109 • Waterfront
$540,000
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Sale Statistics
Sale Overview
Original List Price:
$499,900
Final Sale Price:
$540,000
Difference:
+$40,100 (+8.0%)
Performance Metrics
108.0%
List to Sale Ratio
Sold above asking price
18
Days on Market
Quick sale
Price per Square Foot Analysis
Original $/sq ft:
$863
Sale $/sq ft:
$933
This property sold for $933 per square foot
Sale Summary
This property sold for 8.0% above the original asking price, indicating strong buyer demand.
With only 18 days on market, this was a quick sale compared to typical market conditions.
About this home
An oasis in the City. This charming & cozy studio with a sleeping alcove has a flowing layout with super high ceilings, a Wall of Windows and a European balcony door leading to a private 100 s.f. deck garden, offering a Western exposure for three season use. Upon entering this home you are welcomed into a private foyer leading to the open floorplan offering ample storage and an oversized marble bathroom. The Mariner is a full-service, concierge building located on Boston's historic Waterfront and in the City's culturally vibrant North End.
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Property History
Market Insights
18%
Price Range
20
Total Days on Market
1
Previous Sales
Property Timeline
Current Active Listing - MLS #73578792
Full transaction history available when tracking began
Currently Listed
Sep 17, 2026
$610,000
MLS #73578792 - Active
Previous Transaction - MLS #72949573
Full transaction history available when tracking began
Previously Sold
Apr 14, 2022
$550,000
MLS #72949573
Sold
Nov 4, 2016
$540,000
Property sold
Days on Market: 20
Listed for Sale
Sep 29, 2016
$499,900
Original listing
Agent: Karen Peters
Office: Otis & Ahearn - 84 Atlantic
| Date | Event | Price | Change | $/sqft | Details |
|---|---|---|---|---|---|
| 09/17/2026 | 🏡 Currently Listed | $610,000 | - | - | MLS #73578792 - Active |
| 04/14/2022 | 🏷️ Previously Sold | $550,000 | - | - | MLS #72949573 |
| 11/04/2016 | ✓ Sold | $540,000 | - | - | Property sold |
| 09/29/2016 | 🏠 Listed for Sale | $499,900 | - | - | Original listing |
Tax History
| Year | Taxes | Assessment |
|---|---|---|
| 2016 | $5,228 | $475,290 |
Financial Details
Annual Property Tax
$5,228
Tax Year 2016
HOA Fee
$502
Per month
Assessed Value
$475,290
Facts & Features
Central AC
Home Facts
Type
Residential
Style
Condominium
Year Built
1930
Living Area
579 sq ft
Bedrooms
1
Full Baths
1
Total Rooms
3
Interior
Heating
Heat Pump
Cooling
Central Air
Flooring
None
Appliances
None
Fireplace
None
Basement
N
Laundry
None
Features
None
Exterior
Construction
None
Architecture
None
Roof
None
Features
None
Pool
None
Spa
None
Fencing
None
Patio/Porch
None
Parking
Features
None
Utilities
Electric
None
Water
Public
Sewer
Public Sewer
Gas
None
Other
None
Financial
Annual Tax
$5,228
Assessed Value
$475,290
HOA & Community
HOA Fee
$502
Fee Includes
Water, Sewer, Insurance, Security
Amenities
Elevator(s)
Optional Fee Includes
None
Pets
Yes
MA Disclosures
Seller Disclosures
None
Additional Details
Possession
None
Accepted Financing
None
Structure Type
["Mid-Rise"]
Unit/Building
512
Sq Ft Source
Master Deed
Documents
Master Deed (1)
County
Suffolk
Total market time (incl. prior listings)
20 days
Property Overview
Property Type
Condominium
Listing Type
Sold
Year Built
1930
Bedrooms
1
Full Bathrooms
1
Living Area
579 sq ft
Total Rooms
3
Stories
1
Entry Level
5
Floor Layout
Interactive room guide
Floor Layout
FeaturesNo
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:
Appliances:
Interior Features:
Windows:
Basement:
N
Laundry:
Security:
Construction & Materials
Year Built:
1930
Structure Type:
Mid-Rise
Exterior Materials:
Roof:
Foundation:
Stories:
1
Heating, Cooling & Utilities
Heating:
Heat Pump
Cooling:
Central Air
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:
Special Features
Waterfront:
Yes
Waterfront Type:
Waterfront, Harbor
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
St. John Elementary School
0.1 mi
Grades PK-08
A
Eliot K-8 Innovation School
0.1 mi
|
#47 of 352
|
Score: 57.5
Improved 3 spots from last year
-0.7 below state avg
779 students
Diverse
Strong Attendance
Grades PK-08
East Boston Central Catholic School
0.7 mi
Grades PK-08
B+
Alighieri Dante Montessori School
0.8 mi
|
#5 of 12
|
Score: 45.2
Improved 124 spots from last year
-13 below state avg
100 students
Diverse
Rising School
Strong Attendance
Grades PK-06
D
Adams Elementary School
0.8 mi
|
#770 of 825
|
Score: 31.0
Dropped 91 spots from last year
-27.2 below state avg
222 students
Moderate
Grades PK-06
C
Harvard-Kent Elementary School
0.9 mi
|
#593 of 825
|
Score: 41.1
Dropped 185 spots from last year
-17.1 below state avg
315 students
Very Diverse
Diverse Student Body
Grades PK-06
D
McKay K-8 School
0.9 mi
|
#332 of 352
|
Score: 27.4
Dropped 36 spots from last year
-30.8 below state avg
599 students
Less Diverse
Grades PK-08
C+
Mario Umana Academy
1.0 mi
|
#11 of 16
|
Score: 26.5
Improved 333 spots from last year
-31.7 below state avg
585 students
Less Diverse
Rising School
Grades PK-08
C-
Kennedy Patrick J Elementary School
1.1 mi
|
#669 of 825
|
Score: 37.4
Improved 48 spots from last year
-20.8 below state avg
285 students
Less Diverse
Rising School
Grades PK-06
A-
Warren-Prescott K-8 School
1.1 mi
|
#86 of 352
|
Score: 50.9
Improved 3 spots from last year
-7.3 below state avg
544 students
Diverse
Strong Attendance
Grades PK-08
Middle Schools
10 schools
Middle School Academy
2.2 mi
F
Higginson/Lewis K-8 School
3.6 mi
|
#349 of 352
|
Score: 23.2
Improved 3 spots from last year
-35 below state avg
246 students
Diverse
Grades 03-08
A
Uncommon Schools - Roxbury Preparatory Dorchester Campus Middle School
3.9 mi
|
#4 of 16
|
Score: 42.5
Improved 187 spots from last year
-15.7 below state avg
1,225 students
Diverse
Rising School
College Ready Curriculum
Grades 05-08
Nativity Prep School
4.0 mi
Grades 05-08
Dearborn Middle School
4.3 mi
Mother Caroline Academy
4.3 mi
Grades 05-08
Epiphany School
5.0 mi
Grades 05-08
C
Ohrenberger School
8.7 mi
|
#266 of 352
|
Score: 35.0
Improved 19 spots from last year
-23.2 below state avg
458 students
Diverse
Diverse Student Body
Grades 03-08
Edwards Middle
1.3 mi
UP Academy
2.2 mi
High Schools
10 schools
D
Charlestown High School
1.2 mi
|
#319 of 346
|
Score: 32.9
Improved 52 spots from last year
-25.4 below state avg
646 students
Diverse
11 sports
• 488 athletes
Early College Program
Rising School
Grades 07-12
C
Quincy Upper School
1.4 mi
|
#279 of 346
|
Score: 44.4
Dropped 7 spots from last year
-13.8 below state avg
575 students
Very Diverse
12 sports
• 208 athletes
Diverse Student Body
Grades 06-12
C-
East Boston High School
1.4 mi
|
#300 of 346
|
Score: 38.2
Improved 36 spots from last year
-20 below state avg
1,181 students
Moderate
14 sports
• 584 athletes
Early College Program
Rising School
Grades 07-12
Newman School
1.8 mi
Grades 07-12
Cathedral High School
1.9 mi
9 sports
• 430 athletes
Grades 07-12
A-
O'Bryant School of Math & Science
3.1 mi
|
#90 of 346
|
Score: 61.6
Improved 94 spots from last year
+3.4 above state avg
1,518 students
Very Diverse
High Graduation Rate
Rising School
College Ready Curriculum
Diverse Student Body
Grades 07-12
B
Dearborn STEM Academy
3.1 mi
|
#13 of 25
|
Score: 33.4
Improved 356 spots from last year
-24.8 below state avg
565 students
Moderate
10 sports
• 242 athletes
Early College Program
Rising School
Grades 07-12
A+
Boston Latin School
3.2 mi
|
#20 of 346
|
Score: 73.7
Improved 60 spots from last year
+15.5 above state avg
2,382 students
Very Diverse
18 sports
• 2,006 athletes
Strong AP Program
High Graduation Rate
Rising School
Strong Athletics
Grades 07-12
C
Ruth Batson Academy
3.3 mi
|
#20 of 25
|
Score: 29.1
Improved 345 spots from last year
-29.1 below state avg
584 students
Diverse
8 sports
• 128 athletes
Early College Program
Rising School
Grades 07-12
A+
Boston Latin Academy
3.8 mi
|
#2 of 25
|
Score: 64.9
Improved 214 spots from last year
+6.7 above state avg
1,669 students
Very Diverse
17 sports
• 1,298 athletes
Strong AP Program
High Graduation Rate
Rising School
Strong Athletics
Grades 07-12
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Location
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Neighborhood
Waterfront
300 Commercial Street # 512, Boston MA 02109
Boston, MA 02109
Listing Information
Listing Agent
Karen Peters
Listing Office
Otis & Ahearn - 84 Atlantic
Office Phone
617-227-6070
Agent MLS ID
BB981060
Office MLS ID
NB1579
Listing Data Updated
Nov 5, 2016 12:10 PM 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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