How much do condos cost at 42 8th St?

In the past 12 months, 13 condos sold at 42 8th St (42 8th St, Boston) for a typical $540,000, or $798 per square foot. Sales ranged from $425,000 to $949,000.

How fast do condos sell at 42 8th St?

Units that sold in the past 12 months took a typical 37 days to get an accepted offer, and 23% sold for their first asking price or more. In Charlestown's Navy Yard overall, it took 17 days.

What are the condo fees at 42 8th St?

The typical monthly condo fee at 42 8th St is $762, about $1.00 per square foot a month, based on the fees filed with its listings.

How many condos are for sale at 42 8th St right now?

3 units are for sale, asking from $679,000 to $925,000.

What does it cost to rent at 42 8th St?

15 units rented in the past 12 months, for a typical $3,250 a month. Studio: $2,668; 1 bedroom: $3,325; 2 bedrooms: $4,300.

When was 42 8th St built, and how many units does it have?

42 8th St was built in 1899 and has 367 units, with homes up to the 5th floor, according to its listings.

Building report · Charlestown's Navy Yard, Boston

42 8th St

Boston, MA 02129

13 condos sold at 42 8th St in the past 12 months, for a typical $540K, or $798 a square foot. Right now, 3 are for sale and 1 is for rent.

1899 built
367 units
5 floors with homes
#23 in Greater Boston by condo sales

Unit 2508, for sale at $925,000. Listed by Sarah Fillmann, Coldwell Banker Realty - Boston. MLS #73578395.

$540K: typical sale price, past 12 months
$798: per square foot
37 days: typical time to an accepted offer
23%: sold for asking or more
3: for sale now
$762: typical monthly condo fee

42 8th St sells close to the Charlestown's Navy Yard norm

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

Charlestown's Navy Yard 42 8th St

Price per sq ft ($)777798 +3%
Days to an accepted offer1737 +118%

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

Show the numbers

	42 8th St	Charlestown's Navy Yard
Typical price per sq ft	$798	$777
Typical days to an accepted offer	37	17
Sold for asking or more	23%	27%

For sale now3 units, 0.8% of the building

$925,000
Unit 2508, floor 5
2 bed · 2 bath · 1,089 sq ft
$849/sq ft · 54 days listed · $974/mo fee
Active · Condo · MLS #73578395
42 8th St #2508, Boston, MA
Listed by Sarah Fillmann, Coldwell Banker Realty - Boston
$779,000
Unit 1104, floor 1
2 bed · 2 bath · 937 sq ft
$831/sq ft · 40 days listed · $884/mo fee
Active · Condo · MLS #73585013
42 8th St #1104, Boston, MA
Listed by Myles Couyoumjian, Coldwell Banker Realty - Boston
$679,000Cut $40K
Unit 5314, floor 3
2 bed · 2 bath · 932 sq ft
$729/sq ft · 145 days listed · $899/mo fee
Active · Condo · MLS #73537417
42 Eighth Street #5314, Boston, MA
Listed by Frank Celeste, Gibson Sotheby's International Realty

Under agreement2 units

$699,000
Unit 3315, floor 3
2 bed · 1.5 bath · 938 sq ft
$745/sq ft · 58 days listed · $841/mo fee
Under agreement · Condo · MLS #73576234
42 Eighth #3315, Boston, MA
Listed by Marie Richards, Coldwell Banker Realty - Milton
$574,000
Unit 1519, floor 5
1 bed · 1 bath · 650 sq ft
$883/sq ft · 33 days listed · $920/mo fee
Under agreement · Condo · MLS #73587892
42 8th Street #1519, Boston, MA
Listed by Paul Whaley/Charlie Ring Team, Coldwell Banker Realty - Boston

For rent now2 units

$4,995/mo
Unit 5-519, floor 5
3 bed · 2 bath · 1,205 sq ft
37 days listed
For rent · Condo rental · MLS #73586353
42 8th St #5-519, Boston, MA
Listed by Daniel Oleary, Compass
$3,550/mo
Unit 4414, floor 4
1 bed · 1 bath · 701 sq ft
133 days listed
Rental, under agreement · Condo rental · MLS #73542916
42 8th st #4414, Boston, MA
Listed by Stephen Barker, Cameron Real Estate Group

Price per square foot at 42 8th St, quarter by quarter

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

$ per sq ft 783 (2026 Q3)

Charlestown's Navy Yard typical, past 12 months: $777. Source: Verified market data; analysis by the Observer Markets Desk.

Show the numbers

Quarter	Typical $/sq ft	Sales
2025 Q4	$809	5
2026 Q1	$805	4
2026 Q2	$820	3
2026 Q3	$783	3

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	–	$2,668 (4)	–
1 bedroom	$526K (9)	$3,325 (8)	7.6%
2 bedrooms	$775K (4)	$4,300 (3)	6.7%

What soldPast 12 months, newest first

Closed	Unit	Size	Price	$/sq ft	vs. first ask
Nov 2	Unit 1305MLS #73556300 · J. Barrett & Company	1 bed, 687 sq ft	$510,000	$742	−1.9%
Sep 25	Unit 2511MLS #73519634 · Century 21 Elite Realty	2 bed, 1,013 sq ft	$775,000	$765	−8.7%
Aug 10	Unit 5525MLS #73505795 · Keller Williams Realty Boston Northwest	2 bed, 971 sq ft	$775,000	$798	−3.1%
Jul 9	Unit 2308MLS #73514958 · Compass	1 bed, 690 sq ft	$540,000	$783	−3.4%
May 8	Unit 2306MLS #73488447 · Douglas Elliman Real Estate	1 bed, 713 sq ft	$525,500	$737	−2.5%
Apr 30	Unit 5521MLS #73487528 · Griffin Realty Group	1 bed, 579 sq ft	$475,000	$820	+0.0%
Apr 23	Unit 2514MLS #73491826 · Coldwell Banker Realty - Boston	2 bed, 1,007 sq ft	$949,000	$942	+0.0%
Mar 30	Unit 1315MLS #73466551 · Coldwell Banker Realty - Boston	2 bed, 945 sq ft	$760,000	$804	−3.7%
Mar 3	Unit 4209MLS #73447142 · Coldwell Banker Realty - Boston	1 bed, 793 sq ft	$639,000	$806	+0.0%
Feb 25	Unit 5316MLS #73437829 · Compass	1 bed, 633 sq ft	$532,500	$841	−5.8%

Show all 13 sales

Closed	Unit	Size	Price	$/sq ft	vs. first ask
Jan 6	Unit 1201MLS #73441775 · Coldwell Banker Realty - Boston	1 bed, 703 sq ft	$525,000	$747	−4.4%
Dec 22	Unit 3306MLS #73426726 · Coldwell Banker Realty - Milton	1 bed, 457 sq ft	$425,000	$930	−4.5%
Nov 13	Unit 1307MLS #73409146 · Coldwell Banker Realty - Boston	1 bed, 919 sq ft	$560,000	$609	−9.5%

Where it isWith nearby buildings we track

Questions people ask

How much do condos cost at 42 8th St?: In the past 12 months, 13 condos sold at 42 8th St (42 8th St, Boston) for a typical $540,000, or $798 per square foot. Sales ranged from $425,000 to $949,000.
How fast do condos sell at 42 8th St?: Units that sold in the past 12 months took a typical 37 days to get an accepted offer, and 23% sold for their first asking price or more. In Charlestown's Navy Yard overall, it took 17 days.
What are the condo fees at 42 8th St?: The typical monthly condo fee at 42 8th St is $762, about $1.00 per square foot a month, based on the fees filed with its listings.
How many condos are for sale at 42 8th St right now?: 3 units are for sale, asking from $679,000 to $925,000.
What does it cost to rent at 42 8th St?: 15 units rented in the past 12 months, for a typical $3,250 a month. Studio: $2,668; 1 bedroom: $3,325; 2 bedrooms: $4,300.
When was 42 8th St built, and how many units does it have?: 42 8th St was built in 1899 and has 367 units, with homes up to the 5th floor, according to its listings.

About these numbers

Every figure on this page comes from verified market data for 42 8th 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: “42 8th St building report,” Boston Real Estate Observer, https://bostonrealestateobserver.com/buildings/boston/42-eighth-st/ (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.