Offered at $1,295,000Active

beds: 3
baths: 3
sq ft: 1,341
Built: 1905

621 East Fourth Street

About this home

Rare opportunity to own on a premier Southie block! This home perfectly bridges quiet residential comfort with immediate urban access. Enjoy being steps away from East Broadway's dynamic dining and shopping scene, while living just five blocks from the sprawling South Boston waterfront. From coastal runs on William J. Day Boulevard to beach days at M Street and Carson, the ideal coastal city lifestyle awaits.

Listing last checked: October 14, 2026 at 2:08 PM EDTListing updated: October 12, 2026 at 10:02 AM EDT

Listed by Paul Gannon · Law Offices of Paul J. Gannon · MLS #73586635

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Details at a glance

Interior5 property facts

Rooms: 7
Heating: Hot Water
Cooling: Window Unit(s)
Basement: Yes · Full, Finished
Fireplaces: 1

Building4 property facts

Style: Single Family Residence
Year built: 1905
Foundation: Granite
Roof: Slate

Land & utilities6 property facts

Lot size: 0.03 acres
Water: Public
Sewer: Public Sewer
Waterfront: Y
Pool: Not reported
Zoning: R101

Financial2 property facts

Annual taxes: $4,161
Assessment year: 2027

Location

Estimated monthly cost

Explore costs at the $1,295,000 asking price. Adjust the assumptions to your situation.

Known monthly costs$6,895 / monthAdjust

Down payment (%)Interest rate (%)Loan termMonthly property tax ($)Monthly insurance ($)Monthly HOA ($)

Principal & interest: $6,548
Property tax: $347
Insurance: Not entered
HOA: Not entered

Listing annual taxes: $4,161. Initial monthly tax is one twelfth of that amount. HOA amount was not supplied.

Partial estimate: add insurance, monthly HOA to include those costs. Blank amounts are unknown.

The initial 6.5% rate is illustrative, not a current rate or lender quote. Excludes utilities, maintenance, closing costs and mortgage insurance, which may apply with a down payment below 20%. Taxes and insurance can change.

More property insights

Automated value estimate $1,317,790

Estimated range $1,118,976–$1,516,604.

Automated estimates are not appraisals or guarantees of market value.

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Photo-based condition insights

Overall presentation: above average

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About 621 East Fourth Street

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Yes. We can discuss condition, comparable sales, offer strategy and the questions worth asking before you decide whether to proceed.

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Bean Group · eXp Realty

The property listing data and information, or the Images, set forth herein were provided to MLS Property Information Network, Inc. from third party sources, including sellers, lessors, landlords and public records, and were compiled by MLS Property Information Network, Inc. The property listing data and information, and the Images, are for the personal, non commercial use of consumers having a good faith interest in purchasing, leasing or renting listed properties of the type displayed to them and may not be used for any purpose other than to identify prospective properties which such consumers may have a good faith interest in purchasing, leasing or renting. MLS Property Information Network, Inc. and its subscribers disclaim any and all representations and warranties as to the accuracy of the property listing data and information, or as to the accuracy of any of the Images, set forth herein.

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