Observer
Building report · Central Square, Cambridge

300 Franklin St

Cambridge, MA 02139

5 condos sold at 300 Franklin St in the past 12 months, for a typical $911K, or $1,223 a square foot. That's 19% more per square foot than the typical condo in Central Square.

  • 2025 built
  • 6 units
  • 3 floors with homes
  • #145 in Greater Boston by condo sales
$911K
typical sale price, past 12 months
$1,223
per square foot
57 days
typical time to an accepted offer
80%
sold for asking or more
0
for sale now
$301
typical monthly condo fee

300 Franklin St sells for 19% more per square foot than Central Square

Condo sales in the past 12 months: this building against all 15 condo sales in Central Square.

Central Square 300 Franklin St

  • Price per sq ft ($)1,0281,223 +19%
  • Days to an accepted offer3057 +90%
Source: Verified market data; analysis by the Observer Markets Desk.
Show the numbers
300 Franklin StCentral Square
Typical price per sq ft$1,223$1,028
Typical days to an accepted offer5730
Sold for asking or more80%47%

What soldPast 12 months, newest first

ClosedUnitSizePrice$/sq ftvs. first ask
Apr 29Unit 1MLS #73432793 · 360 Realty LLC3 bed, 1,783 sq ft$1,649,000$925+0.0%
Apr 15Unit 5MLS #73417175 · 360 Realty LLC4 bed, 1,702 sq ft$2,100,000$1,234+0.2%
Feb 4Unit 2MLS #73414629 · 360 Realty LLC1 bed, 453 sq ft$625,000$1,380+4.2%
Nov 19Unit 4MLS #73414717 · 360 Realty LLC2 bed, 690 sq ft$838,800$1,216−0.1%
Nov 10Unit 3MLS #73414636 · 360 Realty LLC2 bed, 745 sq ft$910,800$1,223+0.1%

Where it isWith nearby buildings we track

Questions people ask

How much do condos cost at 300 Franklin St?
In the past 12 months, 5 condos sold at 300 Franklin St (300 Franklin St, Cambridge) for a typical $910,800, or $1,223 per square foot. Sales ranged from $625,000 to $2,100,000.
How fast do condos sell at 300 Franklin St?
Units that sold in the past 12 months took a typical 57 days to get an accepted offer, and 80% sold for their first asking price or more. In Central Square overall, it took 30 days.
What are the condo fees at 300 Franklin St?
The typical monthly condo fee at 300 Franklin St is $301, about $0.29 per square foot a month, based on the fees filed with its listings.
How many condos are for sale at 300 Franklin St right now?
None right now.
When was 300 Franklin St built, and how many units does it have?
300 Franklin St was built in 2025 and has 6 units, with homes up to the 3rd floor, according to its listings.

About these numbers

Every figure on this page comes from verified market data for 300 Franklin St, Cambridge, 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: “300 Franklin St building report,” Boston Real Estate Observer, https://bostonrealestateobserver.com/buildings/cambridge/300-franklin-st/ (data as of November 8, 2026).