How much do condos cost at 150 Williams St?

In the past 12 months, 6 condos sold at 150 Williams St (150 Williams St, Chelsea) for a typical $262,500, or $356 per square foot. Sales ranged from $262,500 to $325,000.

How fast do condos sell at 150 Williams St?

Units that sold in the past 12 months took a typical 30 days to get an accepted offer, and 100% sold for their first asking price or more. In Chelsea overall, it took 30 days.

How many condos are for sale at 150 Williams St right now?

4 units are for sale, asking from $262,500 to $325,000.

When was 150 Williams St built, and how many units does it have?

150 Williams St was built in 2026 and has 20 units, with homes up to the 1st floor, according to its listings.

Building report · Chelsea

150 Williams St

Chelsea, MA 02150

6 condos sold at 150 Williams St in the past 12 months, for a typical $263K, or $356 a square foot. That's 18% less per square foot than the typical condo in Chelsea. Right now, 4 are for sale.

2026 built
20 units
1 floors with homes
#128 in Greater Boston by condo sales

Unit 7, for sale at $325,000. Listed by Roy Avellaneda, ERA Metropolitan Homes. MLS #73561766.

$263K: typical sale price, past 12 months
$356: per square foot
30 days: typical time to an accepted offer
100%: sold for asking or more
4: for sale now
–: typical monthly condo fee

150 Williams St sells for 18% less per square foot than Chelsea

Condo sales in the past 12 months: this building against all 89 condo sales in Chelsea.

Chelsea 150 Williams St

Price per sq ft ($)433356 −18%
Days to an accepted offer3030 +0%

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

Show the numbers

	150 Williams St	Chelsea
Typical price per sq ft	$356	$433
Typical days to an accepted offer	30	30
Sold for asking or more	100%	28%

For sale now4 units, 20.0% of the building

$325,000
Unit 7, floor 1
1 bed · 1 bath · 846 sq ft
$384/sq ft · 90 days listed
Active · Condo · MLS #73561766
150 Williams #7, Chelsea, MA
Listed by Roy Avellaneda, ERA Metropolitan Homes
$325,000
Unit 20, floor 1
1 bed · 1 bath · 721 sq ft
$451/sq ft · 91 days listed
Active · Condo · MLS #73561562
150 Williams #20, Chelsea, MA
Listed by Roy Avellaneda, ERA Metropolitan Homes
$262,500
Unit 1, floor 1
1 bed · 1 bath · 669 sq ft
$392/sq ft · 222 days listed
Active · Condo · MLS #73494331
150 Williams #1, Chelsea, MA
Listed by Roy Avellaneda, ERA Metropolitan Homes
Virtual tour
$262,500
Unit 14, floor 1
1 bed · 1 bath · 671 sq ft
$391/sq ft · 4 days listed
Active · Condo · MLS #73599082
150 Williams #14, Chelsea, MA
Listed by Roy Avellaneda, ERA Metropolitan Homes

What soldPast 12 months, newest first

Closed	Unit	Size	Price	$/sq ft	vs. first ask
Nov 6	Unit 6MLS #73599907 · ERA Metropolitan Homes	1 bed, 671 sq ft	$262,500	$391	+0.0%
Nov 2	Unit 2MLS #73598356 · ERA Metropolitan Homes	1 bed, 854 sq ft	$262,500	$307	+0.0%
Nov 2	Unit 12MLS #73598385 · ERA Metropolitan Homes	1 bed, 838 sq ft	$262,500	$313	+0.0%
Oct 30	Unit 10MLS #73597286 · ERA Metropolitan Homes	1 bed, 799 sq ft	$262,500	$329	+0.0%
Oct 30	Unit 13MLS #73597285 · ERA Metropolitan Homes	1 bed, 846 sq ft	$325,000	$384	+0.0%
Oct 30	Unit 9MLS #73597284 · ERA Metropolitan Homes	1 bed, 846 sq ft	$325,000	$384	+0.0%

Where it isWith nearby buildings we track

Questions people ask

How much do condos cost at 150 Williams St?: In the past 12 months, 6 condos sold at 150 Williams St (150 Williams St, Chelsea) for a typical $262,500, or $356 per square foot. Sales ranged from $262,500 to $325,000.
How fast do condos sell at 150 Williams St?: Units that sold in the past 12 months took a typical 30 days to get an accepted offer, and 100% sold for their first asking price or more. In Chelsea overall, it took 30 days.
How many condos are for sale at 150 Williams St right now?: 4 units are for sale, asking from $262,500 to $325,000.
When was 150 Williams St built, and how many units does it have?: 150 Williams St was built in 2026 and has 20 units, with homes up to the 1st floor, according to its listings.

About these numbers

Every figure on this page comes from verified market data for 150 Williams St, Chelsea, 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: “150 Williams St building report,” Boston Real Estate Observer, https://bostonrealestateobserver.com/buildings/chelsea/150-williams-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.