Observer
Building report · Seaport District, Boston

346 Congress St

Boston, MA 02210

6 condos sold at 346 Congress St in the past 12 months, for a typical $652K, or $941 a square foot. That's 45% less per square foot than the typical condo in the Seaport District. Right now, 4 are for sale and 2 are for rent.

  • 1899 built
  • 92 units
  • 7 floors with homes
  • #108 in Greater Boston by condo sales
346 Congress St, Unit PH1: listing photo
Unit PH1, for sale at $3,100,000. Listed by Kyle Kaagan Team, Gibson Sotheby's International Realty. MLS #73584577.
$652K
typical sale price, past 12 months
$941
per square foot
48 days
typical time to an accepted offer
17%
sold for asking or more
4
for sale now
$1,018
typical monthly condo fee

346 Congress St sells for 45% less per square foot than the Seaport District

Condo sales in the past 12 months: this building against all 72 condo sales in Seaport District.

Seaport District 346 Congress St

  • Price per sq ft ($)1,697941 −45%
  • Days to an accepted offer3848 +25%
Source: Verified market data; analysis by the Observer Markets Desk.
Show the numbers
346 Congress StSeaport District
Typical price per sq ft$941$1,697
Typical days to an accepted offer4838
Sold for asking or more17%38%

For sale now4 units, 4.3% of the building

  • Unit PH1: listing photo

    $3,100,000

    Unit PH1, floor 7

    2 bed · 2.5 bath · 1,942 sq ft

    $1,596/sq ft · 40 days listed · $3,015/mo fee

    Active · Condo · MLS #73584577
    346 Congress St #PH1, Boston, MA
    Listed by Kyle Kaagan Team, Gibson Sotheby's International Realty

  • Unit PH 701: listing photo

    $2,700,000

    Unit PH 701, floor 7

    2 bed · 2 bath · 1,438 sq ft

    $1,878/sq ft · 55 days listed · $2,379/mo fee

    Active · Condo · MLS #73577100
    346 Congress St. #PH 701, Boston, MA
    Listed by The Barka Group, Compass

  • Unit 604: listing photo

    $1,430,000

    Unit 604, floor 6

    2 bed · 2.5 bath · 1,316 sq ft

    $1,087/sq ft · 60 days listed · $1,638/mo fee

    Active · Condo · MLS #73575355
    346 Congress #604, Boston, MA
    Listed by Elizabeth Damon, Donnelly + Co.

  • Unit 608: listing photo

    $829,000

    Unit 608, floor 6

    1 bed · 1 bath · 809 sq ft

    $1,025/sq ft · 80 days listed · $1,119/mo fee

    Active · Condo · MLS #73566813
    346 Congress Street #608, Boston, MA
    Listed by Jeffrey Goldman, Serhant

    Virtual tour

Under agreement1 unit

  • Unit 312: listing photo

    $670,000Cut $29K

    Unit 312, floor 3

    1 bed · 1 bath · 700 sq ft

    $957/sq ft · 80 days listed · $672/mo fee

    Under agreement · Condo · MLS #73582191
    346 Congress #312, Boston, MA
    Listed by Rachel Galante, Campion & Company Fine Homes Real Estate

For rent now2 units

  • Unit 604: listing photo

    $5,700/mo

    Unit 604, floor 6

    2 bed · 2.5 bath · 1,319 sq ft

    3 days listed

    For rent · Condo rental · MLS #73599809
    346 Congress #604, Boston, MA
    Listed by Elizabeth Damon, Donnelly + Co.

  • Unit 209: listing photo

    $5,250/mo

    Unit 209, floor 2

    2 bed · 2 bath · 1,033 sq ft

    80 days listed

    For rent · Condo rental · MLS #73566761
    346 Congress #209, Boston, MA
    Listed by Tom Fitzpatrick, Flow Realty, Inc.

Price per square foot at 346 Congress St, quarter by quarter

Typical sale price per square foot, every sale in our data since 2025 Q4.

  • $ per sq ft 878 (2026 Q3)
Seaport District typical, past 12 months: $1,697. Source: Verified market data; analysis by the Observer Markets Desk.
Show the numbers
QuarterTypical $/sq ftSales
2025 Q4$9722
2026 Q2$9862
2026 Q3$8782

Buy or rent here?

Typical sale price and monthly rent by size, past 12 months. “Rent as % of price” is a year's rent divided by the price: the higher it is, the more renting here costs compared with buying.

SizeSale priceMonthly rentRent as % of price
Studio$644K (3)$3,150 (2)5.9%
1 bedroom$605K (1)$4,138 (6)–
2 bedrooms$1.1M (2)––

What soldPast 12 months, newest first

ClosedUnitSizePrice$/sq ftvs. first ask
Sep 21Unit 518MLS #73554675 · Regatta Realty2 bed, 1,149 sq ft$1,096,000$954−7.9%
Jul 10Unit 514MLS #73499073 · Windrift Real Estate, LLC1 bed, 754 sq ft$605,000$802−3.2%
Jun 8Unit 412MLS #73476267 · CompassStudio, 717 sq ft$640,000$893−7.9%
Jun 4Unit 305MLS #73485347 · Windrift Real Estate, LLC2 bed, 1,019 sq ft$1,099,000$1,079+0.0%
Jan 9Unit 508MLS #73454567 · William Raveis R.E. & Home ServicesStudio, 681 sq ft$660,000$969−5.6%
Dec 17Unit 204MLS #73427784 · The Charles RealtyStudio, 694 sq ft$644,000$928−0.8%

Where it isWith nearby buildings we track

Questions people ask

How much do condos cost at 346 Congress St?
In the past 12 months, 6 condos sold at 346 Congress St (346 Congress St, Boston) for a typical $652,000, or $941 per square foot. Sales ranged from $605,000 to $1,099,000.
How fast do condos sell at 346 Congress St?
Units that sold in the past 12 months took a typical 48 days to get an accepted offer, and 17% sold for their first asking price or more. In the Seaport District overall, it took 38 days.
What are the condo fees at 346 Congress St?
The typical monthly condo fee at 346 Congress St is $1,018, about $1.05 per square foot a month, based on the fees filed with its listings.
How many condos are for sale at 346 Congress St right now?
4 units are for sale, asking from $829,000 to $3,100,000.
What does it cost to rent at 346 Congress St?
8 units rented in the past 12 months, for a typical $3,538 a month. Studio: $3,150; 1 bedroom: $4,138.
When was 346 Congress St built, and how many units does it have?
346 Congress St was built in 1899 and has 92 units, with homes up to the 7th floor, according to its listings.

About these numbers

Every figure on this page comes from verified market data for 346 Congress St, Boston, refreshed November 8, 2026, and updates every morning. “Typical” means the median. Price per square foot uses the living area filed with each listing. Condo fees are monthly. Sales history in our data starts in late 2025.

Cite as: “346 Congress St building report,” Boston Real Estate Observer, https://bostonrealestateobserver.com/buildings/boston/346-congress-st/ (data as of November 8, 2026).