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100 Old Harbor St # 3, Boston MA 02127 - Preview 1 100 Old Harbor St # 3, Boston MA 02127 - Preview 2 100 Old Harbor St # 3, Boston MA 02127 - Preview 3 100 Old Harbor St # 3, Boston MA 02127 - Preview 4 100 Old Harbor St # 3, Boston MA 02127 - Preview 5 100 Old Harbor St # 3, Boston MA 02127 - Preview 6 100 Old Harbor St # 3, Boston MA 02127 - Preview 7 100 Old Harbor St # 3, Boston MA 02127 - Preview 8 100 Old Harbor St # 3, Boston MA 02127 - Preview 9 100 Old Harbor St # 3, Boston MA 02127 - Preview 10 100 Old Harbor St # 3, Boston MA 02127 - Preview 11 100 Old Harbor St # 3, Boston MA 02127 - Preview 12 100 Old Harbor St # 3, Boston MA 02127 - Preview 13 100 Old Harbor St # 3, Boston MA 02127 - Preview 14
100 Old Harbor St # 3, Boston MA 02127 - Preview 1 100 Old Harbor St # 3, Boston MA 02127 - Preview 2 100 Old Harbor St # 3, Boston MA 02127 - Preview 3 100 Old Harbor St # 3, Boston MA 02127 - Preview 4 100 Old Harbor St # 3, Boston MA 02127 - Preview 5 100 Old Harbor St # 3, Boston MA 02127 - Preview 6 100 Old Harbor St # 3, Boston MA 02127 - Preview 7 100 Old Harbor St # 3, Boston MA 02127 - Preview 8 100 Old Harbor St # 3, Boston MA 02127 - Preview 9 100 Old Harbor St # 3, Boston MA 02127 - Preview 10 100 Old Harbor St # 3, Boston MA 02127 - Preview 11 100 Old Harbor St # 3, Boston MA 02127 - Preview 12 100 Old Harbor St # 3, Boston MA 02127 - Preview 13 100 Old Harbor St # 3, Boston MA 02127 - Preview 14

100 Old Harbor St # 3, Boston MA 02127

Boston, MA 02127
$550,000
Est. $3,561/month
1
Beds
1
Baths
569
Sq Ft
$967
Price/Sq Ft
0.01
Acres
1873
Year Built
Condominium
Type
22
Days on Market
Pending Listed May 26, 2026 • MLS# 73524001 Copied! • Updated Jun 18, 2026

About this home

CHECK OUT THE VIEW from your private roof deck! This adorable 1BR penthouse unit with granite counters and stainless steel appliances is located in the heart of Southie. Soaring cathedral ceilings and a custom walk in closet with washer and dryer in unit. Close to many shops and restaurants as well as the beach and ocean! Close to 11 bus with access to financial district and seaport. Showings begin immediately!

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A free agent CMA factors in condition, upgrades, and the street — the things comps alone can't see.

Recently Sold Nearby

Property History

Market Insights

Property Timeline

📋
Status: Active under contract
Jun 15, 2026
Active → Active Under Contract
⏳
Pending Sale
Jun 13, 2026
Offer accepted, sale pending
•
Back On Market
Jun 11, 2026
Active
📋
Status: Active under contract
May 30, 2026
Active → Active Under Contract
🏠
Listed for Sale
May 26, 2026
$550,000
Original listing
Agent: Kimberly O'Neil Mara Office: Century 21 North East

Tax History

Year Taxes Assessment
2025 $5,541 $478,500

Financial Details

Annual Property Tax
$5,541
Tax Year 2025
HOA Fee
$118
Monthly
Assessed Value
$478,500

Facts & Features

Home Facts

Type Residential
Style Condominium
Year Built 1873
Living Area 569 sq ft
Lot Size 0.01 acres
Bedrooms 1
Full Baths 1
Total Rooms 4

Interior

Heating Forced Air, Natural Gas
Cooling Window Unit(s)
Flooring Hardwood
Appliances Range, Oven, Dishwasher, Disposal, Refrigerator, Washer
Fireplace None
Basement N
Laundry Flooring - Hardwood, Main Level, Third Floor, In Unit
Features None

Exterior

Construction None
Architecture None
Roof None
Features Deck, Deck - Roof
Pool None
Spa None
Fencing None
Patio/Porch Deck, Deck - Roof
Features On Street
Electric 100 Amp Service
Water Public
Sewer Public Sewer
Gas None
Other For Gas Range
Annual Tax $5,541
Assessed Value $478,500

HOA & Community

HOA Fee $118 Monthly
Fee Includes Water, Insurance, Maintenance Structure
Amenities None
Optional Fee Includes None
Pets Yes
Seller Disclosures None
Possession None
Accepted Financing None
Structure Type ["2\/3 Family"]
Unit/Building 3
Sq Ft Source Public Record
Documents None
County Suffolk
Total market time (incl. prior listings) 23 days

Property Overview

Property Type
Condominium
Listing Type
For Sale
Year Built
1873
Bedrooms
1
Full Bathrooms
1
Living Area
569 sq ft
Total Rooms
4
Stories
1
Entry Level
3
Main Level Bedrooms
1

Room Details

Other Floor

Bedroom5
Bedroom4
Bedroom3
Dining Room
Bathroom2
Bedroom2
Bathroom3
Office
Family Room
Master Bathroom
No

Main,Third Floor

Bathroom1
Bathroom - Full, Flooring - Stone/Ceramic Tile
Kitchen
Flooring - Hardwood, Countertops - Stone/Granite/Solid, Exterior Access, Stainless Steel Appliances
Living Room
Flooring - Hardwood
Master Bedroom
Walk-In Closet(s), Flooring - Hardwood

Interior Features

Flooring: Hardwood
Appliances: Range, Oven, Dishwasher, Disposal, Refrigerator, Washer
Interior Features:
Windows:
Basement: N
Laundry: Flooring - Hardwood, Main Level, Third Floor, In Unit
Security:

Construction & Materials

Year Built: 1873
Structure Type: 2/3 Family
Exterior Materials:
Roof:
Foundation:
Stories: 1

Heating, Cooling & Utilities

Heating: Forced Air, Natural Gas
Heating Zones: 1
Cooling: Window Unit(s)
Cooling Zones: 1
Hot Water:
Water Source: Public
Sewer: Public Sewer
Energy Features:

Exterior & Lot

Exterior Features: Deck, Deck - Roof
Patio & Porch: Deck, Deck - Roof
Fencing:
Other Structures:
Lot Features:
Road Surface:

Parking & Garage

Parking Features: On Street
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
E

Elementary Schools

10 schools
St. Peter Academy School
0.4 mi
Grades PK-08
F
Tynan Elementary School
0.5 mi | #816 of 824 | Score: 24.8
Dropped 94 spots from last year
-33.5 below state avg
227 students Very Diverse
Diverse Student Body
Grades PK-06
F
Condon K-8 School
0.5 mi | #345 of 352 | Score: 24.6
Improved 13 spots from last year
-33.6 below state avg
518 students Diverse
Diverse Student Body
Grades PK-08
F
Clap Elementary School
0.8 mi | #808 of 824 | Score: 26.3
Dropped 23 spots from last year
-31.9 below state avg
140 students Diverse
Diverse Student Body
Grades PK-06
Saint John Paul II Academy - Columbia
0.9 mi
Grades PK-08
B
Excel Academy Charter School
0.9 mi | #155 of 346 | Score: 54.9
Improved 160 spots from last year
-3.3 below state avg
1,379 students Moderate
High Graduation Rate Rising School
Grades 05-12
B
Boston Collegiate Charter School
1.0 mi | #167 of 346 | Score: 53.7
Improved 31 spots from last year
-4.5 below state avg
708 students Diverse
Rising School College Ready Curriculum Diverse Student Body
Grades 05-12
D
Dever Elementary School
1.0 mi | #752 of 824 | Score: 32.4
Improved 56 spots from last year
-25.9 below state avg
445 students Diverse
Rising School
Grades K-06
C-
Everett Elementary School
1.4 mi | #728 of 824 | Score: 33.7
Dropped 53 spots from last year
-24.5 below state avg
288 students Diverse
Diverse Student Body
Grades PK-06
F
Blackstone Elementary School
1.4 mi | #809 of 824 | Score: 26.3
Improved 12 spots from last year
-31.9 below state avg
582 students Moderate
Grades PK-06
M

Middle Schools

10 schools
Middle School Academy
0.2 mi
A
Uncommon Schools - Roxbury Preparatory Dorchester Campus Middle School
1.9 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
F
Higginson/Lewis K-8 School
2.2 mi | #349 of 352 | Score: 23.6
Improved 3 spots from last year
-34.6 below state avg
213 students Diverse
Grades 03-08
Dearborn Middle School
2.4 mi
Mother Caroline Academy
2.5 mi
Grades 05-08
Epiphany School
2.8 mi
Grades 05-08
Nativity Prep School
2.9 mi
Grades 05-08
C
Ohrenberger School
7.1 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
UP Academy
0.2 mi
McCormack Middle
1.0 mi
H

High Schools

10 schools
C
Ruth Batson Academy
1.0 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
Cathedral High School
1.3 mi
9 sports • 430 athletes
Grades 07-12
C
Quincy Upper School
1.4 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
B
Dearborn STEM Academy
1.8 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
A+
Boston Latin Academy
2.2 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
A-
O'Bryant School of Math & Science
2.2 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
Newman School
2.3 mi
Grades 07-12
A+
Boston Latin School
2.8 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
Meridian Academy
3.1 mi
Grades 06-09
D
Charlestown High School
3.4 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
Learn about these ratings
School data provided by BMN Schools

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Loan Amount
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Monthly Payment Breakdown

Principal & Interest $0
Property Tax $462
Homeowners Insurance $200
HOA Fee $118/mo
PMI (if <20% down) $0

Loan Summary

Total of 360 payments $0
Total principal paid $0
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Payment Over Time

Interest
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Year 1
95% Interest
Year 15
50/50
Year 30
95% Principal
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Location

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Neighborhood

100 Old Harbor St # 3, Boston MA 02127

Boston, MA 02127

Listing Information

Listing Agent Kimberly O'Neil Mara
Listing Office Century 21 North East
Office Phone 800-844-7653
Agent MLS ID B8000844
Office MLS ID AN8462
Listing Data Updated Jun 18, 2026 4:34 PM EDT
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.

Contact Us

BMN Boston Real Estate
BMN Boston Real Estate
Douglas Elliman
(617) 800 - 9008 contact@bmnboston.com
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