Recently Viewed Properties

No photo available

See This Home
Save This Listing
Close

$550,000 Just Listed

  • For Sale
  • Active
  • Condo
  • 1 Bed
  • 1 Full Bath
  • 569 Sq. Ft.
  • 0.01 Acres
  • Updated 1 hour ago

Next open house:

Open House: 9:00 AM - 10:00 AM

Saturday 5/30 9:00 AM - 10:00 AM

100 Old Harbor St #3,Boston, MA 02127

100 Old Harbor St #3BostonMA02127

Get directions

No photo available

OPEN HOUSE SATURDAY MAY 30th 9-10am. 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!

Full Property Details for 100 Old Harbor St #3

General

  • Price: $550,000
  • HOA FEE: $118/month
  • Taxes: $5,541 (2025)
  • Status: Active
  • Type: Condo
  • MLS ID: 73524001
  • Updated: Today (5/26/2026)
  • Added to Site: Today

Rooms

Bathrooms

  • Total Bathrooms: 1
  • Full Bathrooms: 1
  • Bathroom 1: Main, Third

Bedrooms

  • Total Bedrooms: 1
  • Primary Bedroom: Main, Third

Other Rooms

  • Living Room: Main, Third
  • Kitchen: Main, Third

Parking

  • Parking Features: On Street

Location

  • County: Suffolk

Structural Information

  • Basement: Yes
  • Stories/Levels: 1
  • Square Feet: 569
  • Year Built: 1873

Lot Features

  • Lot Size (Acres): 0.01

Financial Considerations

  • Association Fee: $118
  • Tax Amount: $5,541
  • Tax Year: 2025

Disclosures and Reports

  • Property ID: W:07 P:01395 S:006, 4871501

Listed by Century 21 North East, Kimberly O'Neil Mara

Quickly Find Out More

* Indicates a required field

Yes, I would like more information. Please use and/or share my information with a Coldwell Banker ® affiliated agent to contact me about my real estate needs. By clicking Send Message, I request to be contacted by phone or text message and consent to being contacted by automated means. I understand that my consent to receive calls or texts is not a condition of purchasing any property, goods, or services. Alternatively, I understand that I can access real estate services by email or I can contact the agent myself.

If an Coldwell Banker affiliated agent is not available in the area where I need assistance, I agree to be contacted by a real estate agent affiliated with another brand owned or licensed by Anywhere Real Estate (BHGRE®, CENTURY 21®, Corcoran®, ERA®, or Sotheby’s International Realty®). I acknowledge that I have read and agree to the Terms of Use and Privacy Notice.

We Value Your Privacy

Listing agent

— 100 Old Harbor St #3 —

  • Kimberly O'Neil Mara

    Century 21 North East

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 100 Old Harbor St #3

School District:Boston School District
NameGradesDistance
Perkins Elementary School
50 Burke Street, Boston, MA 02127
K-50.2 mi
Joseph P. Tynan Elementary School
650 E Fourth Street, Boston, MA 02127
PK-50.5 mi
James F. Condon School
200 D Street, Boston, MA 02127
PK-80.5 mi
McCormack Middle School
315 Mt Vernon Street, Boston, MA 02125
6-81 mi
Quincy Upper School
152 Arlington Street, Boston, MA 02116
6-121.6 mi
Dearborn Middle School
36 Winthrop St, Boston, MA 02119
6-121.8 mi
Excel High School
95 G. Street, Boston, MA 02127
9-120.2 mi
Boston Adult Academy
20 Church St, Boston, MA 02116
9-121.6 mi
Snowden Int'L High School
150 Newbury Street, Boston, MA 02116
9-122 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 100 Old Harbor St #3 Get Price Alerts and Save Property

Date
Details
Price
Change
Source
5/26/2026
Listed
$550,000
122.67%
MLS
9/15/2011
Sold
$247,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 100 Old Harbor St #3

Year
Property Taxes
Change
Tax Assessment
Change
2025
$5,541
6%
$478,500
—
2024
$5,233
4%
$480,100
2%
2023
$5,051
3%
$470,300
4%
2022
$4,920
4%
$452,200
2%
2021
$4,730
8%
$443,300
7%
2020
$4,360
7%
$412,900
7%
2019
$4,068
6%
$386,000
5%
2018
$3,851
6%
$367,500
7%
2017
$3,639
2%
$343,600
6%
2016
$3,565
1%
$324,100
11%
2015
$3,545
8%
$292,700
12%
2014
$3,287
—
$261,300
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 100 Old Harbor St #3

$
Down Payment
%
$
%

$
$
$

*These costs are estimates, and the interest rates assume exceptional credit standing.

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Listed by Century 21 North East, Kimberly O'Neil Mara

Similar Properties near 100 Old Harbor St #3

This is a carousel with tiles that activate property listing cards. Use the previous and next buttons to navigate.

35 Story St, Boston, MA 02127 - Photo 1
$545,000

35 Story St  #2  Boston, MA 02127

  • Condo
  • Active
  • Updated 12 days ago
  • 1
    Bed
  • 1
    Total Bath
  • 595
    Sq. Ft.
135 I St, Boston, MA 02127 - Photo 1 Price Reduced
-$26,000 (-4.52%)
$549,000
Open House

135 I St  #1  Boston, MA 02127

  • Condo
  • Active
  • Updated 4 hours ago
  • 1
    Bed
  • 1
    Total Bath
  • 790
    Sq. Ft.
Listed by The Quirk Group (617) 266-4430
350 W Fourth St, Boston, MA 02127 - Photo 1
$509,000

350 W Fourth St  #103  Boston, MA 02127

  • Condo
  • Active
  • Updated 12 days ago
  • 1
    Bed
  • 1
    Total Bath
  • 541
    Sq. Ft.
523 E 2nd St, Boston, MA 02127 - Photo 1
$515,000

523 E 2nd St  #5  Boston, MA 02127

  • Condo
  • Active
  • 1
    Bed
  • 1
    Total Bath
  • 442
    Sq. Ft.
Listed by Tracy Shea (617) 697-4570 and Sophie Shea (617) 877-6112

Just Listed near 100 Old Harbor St #3

This is a carousel with tiles that activate property listing cards. Use the previous and next buttons to navigate.

220 Spencer Ave, Chelsea, MA 02150 - Photo 1 Just Listed
$499,000

220 Spencer Ave  #304  Chelsea, MA 02150

  • Condo
  • Active
  • Updated 1 hour ago
  • 1
    Bed
  • 1
    Total Bath
  • 1,146
    Sq. Ft.
86 Tudor St, Chelsea, MA 02150 - Photo 1 Just Listed
$413,500
Open House

86 Tudor St  #1  Chelsea, MA 02150

  • Condo
  • Active
  • Updated 6 hours ago
  • 2
    Beds
  • 1
    Total Bath
  • 1,358
    Sq. Ft.
135 Bellingham St, Chelsea, MA 02150 - Photo 1 Just Listed
$729,000
Open House

135 Bellingham St  Chelsea, MA 02150

  • Single Family
  • Active
  • Updated 1 hour ago
  • 3
    Beds
  • 4
    Total Baths
  • 2,110
    Sq. Ft.
9 Everett Ave, Chelsea, MA 02150 - Photo 1 Just Listed
$2,400

9 Everett Ave  Chelsea, MA 02150

  • Commercial Lease
  • Active

Price Reduced near 100 Old Harbor St #3

This is a carousel with tiles that activate property listing cards. Use the previous and next buttons to navigate.

87 Parker St, Chelsea, MA 02150 - Photo 1 Price Reduced
-$24,100 (-4.39%)
$524,900

87 Parker St  #402  Chelsea, MA 02150

  • Condo
  • Active
  • Updated 3 days ago
  • 2
    Beds
  • 2
    Total Baths
  • 812
    Sq. Ft.
35 Chestnut St, Chelsea, MA 02150 - Photo 1 Price Reduced
-$5,100 (-1.12%)
$449,900

35 Chestnut St  #2  Chelsea, MA 02150

  • Condo
  • Active
  • Updated 2 days ago
  • 2
    Beds
  • 2
    Total Baths
  • 954
    Sq. Ft.
87 Parker St, Chelsea, MA 02150 - Photo 1 Price Reduced
-$24,100 (-4.39%)
$524,900

87 Parker St  #403  Chelsea, MA 02150

  • Condo
  • Active
  • Updated 3 days ago
  • 2
    Beds
  • 2
    Total Baths
  • 807
    Sq. Ft.
343 Harvard St, Cambridge, MA 02139 - Photo 1 Price Reduced
-$25,000 (-1.06%)
$2,325,000
Open House

343 Harvard St  Cambridge, MA 02139

  • Multi-Family
  • Active
  • Updated 2 days ago
  • 5
    Units
  • 7
    Total Beds
  • 0.08
    Acres
Listed by Brian Gagnon (617) 733-3983

Recent Sales near 100 Old Harbor St #3

This is a carousel with tiles that activate property listing cards. Use the previous and next buttons to navigate.

296 E 8th St, Boston, MA 02127 - Photo 1 Sold
$512,000

296 E 8th St  #3  Boston, MA 02127

  • Condo
  • Closed
  • 2
    Beds
  • 1
    Total Bath
  • 594
    Sq. Ft.
266 Bowen St, Boston, MA 02127 - Photo 1 Sold
$599,900

266 Bowen St  #1  Boston, MA 02127

  • Condo
  • Closed
  • 1
    Bed
  • 2
    Total Baths
  • 787
    Sq. Ft.
217 West 9th, Boston, MA 02127 - Photo 1 Sold
$542,000

217 West 9th  #2  Boston, MA 02127

  • Condo
  • Closed
  • Updated 3 days ago
  • 2
    Beds
  • 1
    Total Bath
  • 598
    Sq. Ft.
504 E 8th St, Boston, MA 02127 - Photo 1 Sold
$555,550

504 E 8th St  #2  Boston, MA 02127

  • Condo
  • Closed
  • 1
    Bed
  • 1
    Total Bath
  • 510
    Sq. Ft.

100 Old Harbor St #3, Boston, MA 02127 (MLS# 73524001) is a Condo property with 1 bedroom and 1 full bathroom. 100 Old Harbor St #3 is currently listed for $550,000 and was received on May 26, 2026. Want to learn more about 100 Old Harbor St #3? Do you have questions about finding other Condo real estate for sale in South Boston? You can browse all South Boston real estate or contact a Coldwell Banker agent to request more information.

Tour this property