How much do condos cost at 45 1st Ave?

In the past 12 months, 5 condos sold at 45 1st Ave (45 1st Ave, Boston) for a typical $475,000, or $709 per square foot. Sales ranged from $328,512 to $800,000.

How fast do condos sell at 45 1st Ave?

Units that sold in the past 12 months took a typical 14 days to get an accepted offer, and 40% sold for their first asking price or more. In Charlestown's Navy Yard overall, it took 17 days.

What are the condo fees at 45 1st Ave?

The typical monthly condo fee at 45 1st Ave is $504, about $0.73 per square foot a month, based on the fees filed with its listings.

How many condos are for sale at 45 1st Ave right now?

1 unit is for sale, asking from $629,000 to $629,000.

What does it cost to rent at 45 1st Ave?

3 units rented in the past 12 months, for a typical $5,295 a month. 2 bedrooms: $5,295.

When was 45 1st Ave built, and how many units does it have?

45 1st Ave was built in 2015 and has 54 units, with homes up to the 4th floor, according to its listings.

Building report · Charlestown's Navy Yard, Boston

45 1st Ave

Boston, MA 02129

5 condos sold at 45 1st Ave in the past 12 months, for a typical $475K, or $709 a square foot. That's 9% less per square foot than the typical condo in Charlestown's Navy Yard. Right now, 1 is for sale.

2015 built
54 units
4 floors with homes
#178 in Greater Boston by condo sales

Unit 101, for sale at $629,000. Listed by Rachel Chang, Century 21 Cityside. MLS #73574987.

$475K: typical sale price, past 12 months
$709: per square foot
14 days: typical time to an accepted offer
40%: sold for asking or more
1: for sale now
$504: typical monthly condo fee

45 1st Ave sells for 9% less per square foot than Charlestown's Navy Yard

Condo sales in the past 12 months: this building against all 26 condo sales in Charlestown's Navy Yard.

Charlestown's Navy Yard 45 1st Ave

Price per sq ft ($)777709 −9%
Days to an accepted offer1714 −18%

Source: Verified market data; analysis by the Observer Markets Desk.

Show the numbers

	45 1st Ave	Charlestown's Navy Yard
Typical price per sq ft	$709	$777
Typical days to an accepted offer	14	17
Sold for asking or more	40%	27%

For sale now1 unit, 1.9% of the building

$629,000Cut $30K
Unit 101, floor 1
2 bed · 1 bath · 862 sq ft
$730/sq ft · 60 days listed · $750/mo fee
Active · Condo · MLS #73574987
45 1st Ave #101, Boston, MA
Listed by Rachel Chang, Century 21 Cityside

For rent now1 unit

$2,000/mo
Unit 111, floor 1
Studio · 1 bath · 500 sq ft
17 days listed
Rental, under agreement · Condo rental · MLS #73594620
45 1st ave #111, Boston, MA
Listed by Damian KokEnnen, SkyBridge Realty, LLC

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.

Size	Sale price	Monthly rent	Rent as % of price
Studio	–	$2,000 (1)	–
1 bedroom	$331K (3)	–	–
2 bedrooms	$768K (2)	$5,295 (2)	8.3%

What soldPast 12 months, newest first

Closed	Unit	Size	Price	$/sq ft	vs. first ask
Oct 27	Unit 313MLS #73551126 · Maloney Properties LLC	1 bed, 500 sq ft	$330,669	$661	+0.0%
Jul 29	Unit 110MLS #73509701 · Compass	2 bed, 1,036 sq ft	$735,000	$709	−7.5%
Jun 30	Unit 408MLS #73510578 · Gibson Sotheby's International Realty	2 bed, 1,036 sq ft	$800,000	$772	−3.0%
Jun 1	Unit 105MLS #73505589 · Compass	1 bed, 500 sq ft	$475,000	$950	−2.9%
Apr 30	Unit 406MLS #73488706 · Coldwell Banker Realty - Boston	1 bed, 500 sq ft	$328,512	$657	+0.0%

Where it isWith nearby buildings we track

Questions people ask

How much do condos cost at 45 1st Ave?: In the past 12 months, 5 condos sold at 45 1st Ave (45 1st Ave, Boston) for a typical $475,000, or $709 per square foot. Sales ranged from $328,512 to $800,000.
How fast do condos sell at 45 1st Ave?: Units that sold in the past 12 months took a typical 14 days to get an accepted offer, and 40% sold for their first asking price or more. In Charlestown's Navy Yard overall, it took 17 days.
What are the condo fees at 45 1st Ave?: The typical monthly condo fee at 45 1st Ave is $504, about $0.73 per square foot a month, based on the fees filed with its listings.
How many condos are for sale at 45 1st Ave right now?: 1 unit is for sale, asking from $629,000 to $629,000.
What does it cost to rent at 45 1st Ave?: 3 units rented in the past 12 months, for a typical $5,295 a month. 2 bedrooms: $5,295.
When was 45 1st Ave built, and how many units does it have?: 45 1st Ave was built in 2015 and has 54 units, with homes up to the 4th floor, according to its listings.

About these numbers

Every figure on this page comes from verified market data for 45 1st Ave, 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: “45 1st Ave building report,” Boston Real Estate Observer, https://bostonrealestateobserver.com/buildings/boston/45-first-ave/ (data as of November 8, 2026).

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.

Figures refresh every morning. This page was last updated November 8, 2026.