Penthouse Living in Dorchester's Polish Triangle — 29 Mount Vernon St, Unit 3

By Charles King | Charles King Group, Hingham, MA | Published May 14, 2026

Dorchester's Polish Triangle has been quietly earning its reputation as one of Boston's most compelling condo addresses, and 29 Mount Vernon St, Unit 3 is a clear illustration of why. This top-floor penthouse — listed at $779,000 — offers 1,267 square feet of well-finished living space, two bedrooms, two full baths, two fireplaces, and something genuinely rare in this price range: two deeded side-by-side parking spaces and private outdoor space at multiple levels, including an expansive roof deck with city skyline and harbor views.

The building dates to 1880, the unit sits on the third and top floor, and the price per square foot comes in at $614.84 — a meaningful data point when you compare it to what similar finishes command in adjacent South Boston or the Seaport. Monthly condo fees are $255, covering water, sewer, master insurance, exterior maintenance, landscaping, and snow removal. No special assessments. Pets welcome.

Open house is scheduled for Saturday, May 16, 2026, 12:30–1:30 PM.

What Does $779,000 Get You in Dorchester Right Now?

The honest answer: quite a lot. At $614.84 per square foot with two parking spaces included, this unit benchmarks well against comparable two-bedroom condos in South Boston, where per-square-foot pricing routinely runs $700–$900+ and deeded parking adds significant cost or simply isn't available. The Polish Triangle sits minutes from Andrew Square and South Bay, with Red Line access, multiple bus routes, and I-93 within easy reach — the commute math works in every direction.

The 6-unit building has four owner-occupied units, which signals a stable, owner-focused community. That detail matters for financing (conventional and FHA eligibility often hinges on owner-occupancy ratios) and for the day-to-day character of the building.

A Closer Look at the Layout and Features

Open-Concept Living Area with Mantled Fireplace

The main living and dining space runs open-concept with high ceilings and hardwood floors throughout. A mantled fireplace anchors the room — functionally and visually. A long counter-bar with seating for five connects the living area to the kitchen, making the space work equally well for quiet evenings and larger gatherings.

Kitchen — Gas Range, Wine Fridge, Ample Prep Space

The kitchen is equipped with a gas range, wine refrigerator, dishwasher, disposal, full-size refrigerator and freezer, and dedicated prep space. In-unit washer and dryer are also included. The appliance package is complete — nothing to add at move-in.

Primary Suite with Two Fireplaces and En-Suite Bath

The king-sized primary bedroom includes a second fireplace, two large closets, and a private en-suite bath. Two fireplaces in a 1,267-square-foot condo is not a detail you encounter often; it gives both the main living space and the primary suite a warmth and character that new construction at this price point rarely offers.

Second Bedroom with Designer Details

The second bedroom features designer finishes and a large closet. The room has been used as a home office — the photos show a well-configured dual-desk setup — and the space is flexible enough to serve in multiple configurations.

Private Back Deck and Roof Deck — City Skyline and Harbor Views

Two levels of outdoor space: a private back deck off the unit and an expansive roof deck accessed via the building's exterior stair. The roof deck delivers sunset views of the city skyline and harbor. In Boston's condo market, outdoor space of this quality — private, usable, with genuine views — is a meaningful differentiator.

Two Deeded Side-by-Side Parking Spaces

Two off-street, deeded, side-by-side spaces. This is the feature that consistently stops buyers in their tracks when they're comparing Dorchester to South Boston or the Seaport — where parking, when available, often adds $50,000–$75,000 to the purchase price or comes as a rental that transfers with nothing.

Storage and Building Amenities

The unit includes private storage. The building exterior is wood, the roof is rubber, and the building is fully complete with six units. Laundry is in-unit. All utilities are city/town water and sewer.

Location: Andrew Square, South Bay, and the Red Line

29 Mount Vernon St sits in Dorchester's Polish Triangle, the residential pocket bounded roughly by Dorchester Ave, Boston Street, and Mt. Vernon Street. From here:

• Andrew Square (Red Line, Silver Line connections): approximately 0.5 miles
• South Bay shopping and dining: approximately 0.6 miles
• I-93 on-ramp: direct access via Morrissey Boulevard or the Southeast Expressway
• South Boston Broadway corridor: approximately 1.2 miles
• Downtown Boston: 15–20 minutes by Red Line

The neighborhood has walk/jog trails, medical facilities, public schools, a T-station, and university access listed among its amenities — a useful snapshot of the surrounding infrastructure.

Open House — Saturday, May 16, 2026

Date: Saturday, May 16, 2026 Time: 12:30 PM – 1:30 PM

Format: In-Person

Address: 29 Mount Vernon St, Unit 3, Boston, MA 02125

Directions: Boston Street to Mount Vernon Street.

To schedule a private showing before or after the open house, contact the Charles King Group directly: 📞 617-549-8542 | ✉ [email protected] | 🌐 charleskingre.com

Frequently Asked Questions — 29 Mount Vernon St, Unit 3, Dorchester

What is the list price for 29 Mount Vernon St, Unit 3?

The list price is $779,000. At 1,267 square feet, the price per square foot is $614.84. The unit is a two-bedroom, two-bathroom penthouse condo listed by the Charles King Group through Real Broker MA, LLC (MLS #73518483, listed May 13, 2026).

What is included in the $255 monthly condo fee?

The $255 monthly condo fee covers water, sewer, master insurance, exterior maintenance, landscaping, and snow removal. There are no current special assessments. The fee is on the lower end for a Boston condo with this level of building coverage.

Does the unit come with parking?

Yes. The unit includes two deeded side-by-side off-street parking spaces. Deeded parking for two vehicles is included in the $779,000 list price with no additional cost.

How does this Dorchester condo compare in price to South Boston?

Comparable two-bedroom condos in South Boston have been selling at median prices above $800,000, with price per square foot frequently in the $750–$900 range. At $614.84 per square foot with two deeded parking spaces included, 29 Mount Vernon St benchmarks meaningfully below comparable finished product in the adjacent South Boston market.

What is the annual property tax on this unit?

The 2026 property tax is $6,035.34, reflecting the residential exemption. The assessed value is $842,400.

Is there outdoor space at 29 Mount Vernon St, Unit 3?

Yes. The unit has two levels of private outdoor space: a private back deck off the unit and an expansive roof deck with city skyline and harbor views. Both are private to the unit.

How close is this unit to the Red Line?

Andrew Square station (Red Line) is approximately 0.5 miles from 29 Mount Vernon St. The station also connects to Silver Line service. Additionally, the unit has easy access to multiple bus routes and I-93.

Listing data sourced from MLSPIN. Condo sale, listed May 13, 2026. MLS #73518483. Published by the Charles King Group, Hingham, MA.

Charles King Group is a top-producing real estate team serving the South Shore (Hingham, Cohasset, Scituate, Norwell, Hanover, and surrounding towns), Boston, Cape Cod, Metro West, Northern Middlesex & the Merrimack Valley, and Bristol County. Brokered by Real Broker MA, LLC. Ranked in the top 1.5% of agents nationwide by Real Trends.