How much do condos cost at 21 Beacon St?

In the past 12 months, 8 condos sold at 21 Beacon St (21 Beacon St, Boston) for a typical $536,500, or $1,110 per square foot. Sales ranged from $450,000 to $619,000.

How fast do condos sell at 21 Beacon St?

Units that sold in the past 12 months took a typical 70 days to get an accepted offer, and 0% sold for their first asking price or more. In Beacon Hill overall, it took 29 days.

What are the condo fees at 21 Beacon St?

The typical monthly condo fee at 21 Beacon St is $618, about $1.23 per square foot a month, based on the fees filed with its listings.

How many condos are for sale at 21 Beacon St right now?

4 units are for sale, asking from $409,900 to $675,000.

What does it cost to rent at 21 Beacon St?

21 units rented in the past 12 months, for a typical $3,000 a month. Studio: $2,500; 1 bedroom: $3,000.

When was 21 Beacon St built, and how many units does it have?

21 Beacon St was built in 1899 and has 163 units, with homes up to the 11th floor, according to its listings.

Building report · Beacon Hill, Boston

21 Beacon St

Boston, MA 02108

8 condos sold at 21 Beacon St in the past 12 months, for a typical $537K, or $1,110 a square foot. That's 14% less per square foot than the typical condo in Beacon Hill. Right now, 4 are for sale and 2 are for rent.

1899 built
163 units
11 floors with homes
#58 in Greater Boston by condo sales

Unit 3N, for sale at $675,000. Listed by The Morgan Franklin Group, Coldwell Banker Realty - Boston. MLS #73577046.

$537K: typical sale price, past 12 months
$1,110: per square foot
70 days: typical time to an accepted offer
0%: sold for asking or more
4: for sale now
$618: typical monthly condo fee

21 Beacon St sells for 14% less per square foot than Beacon Hill

Condo sales in the past 12 months: this building against all 136 condo sales in Beacon Hill.

Beacon Hill 21 Beacon St

Price per sq ft ($)1,2961,110 −14%
Days to an accepted offer2970 +141%

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

Show the numbers

	21 Beacon St	Beacon Hill
Typical price per sq ft	$1,110	$1,296
Typical days to an accepted offer	70	29
Sold for asking or more	0%	27%

For sale now4 units, 2.5% of the building

$675,000
Unit 3N, floor 3
1 bed · 1 bath · 565 sq ft
$1,195/sq ft · 55 days listed · $585/mo fee
Active · Condo · MLS #73577046
21 Beacon St #3N, Boston, MA
Listed by The Morgan Franklin Group, Coldwell Banker Realty - Boston
$599,000
Unit 4T, floor 4
1 bed · 1 bath · 591 sq ft
$1,014/sq ft · 12 days listed · $810/mo fee
Active · Condo · MLS #73596359
21 Beacon St #4T, Boston, MA
Listed by Jennifer Gelfand, Coldwell Banker Realty - Boston
Virtual tour
$525,000
Unit 6B, floor 6
1 bed · 1 bath · 438 sq ft
$1,199/sq ft · 41 days listed · $537/mo fee
Active · Condo · MLS #73583625
21 Beacon Street #6B, Boston, MA
Listed by Anthony Bruno, Gibson Sotheby's International Realty
Virtual tour
$409,900Cut $10K
Unit 3K, floor 3
Studio · 1 bath · 262 sq ft
$1,565/sq ft · 194 days listed · $275/mo fee
Active · Condo · MLS #73509451
21 Beacon St #3K, Boston, MA
Listed by Enrique Arias, Team Zingales Realty, LLC

For rent now2 units

$5,000/mo
Unit 3H, floor 3
2 bed · 2 bath · 929 sq ft
81 days listed
For rent · Condo rental · MLS #73566371
21 Beacon St #3H, Boston, MA
Listed by The Morgan Franklin Group, Coldwell Banker Realty - Boston
$2,500/mo
Unit 9L, floor 9
1 bed · 1 bath · 325 sq ft
5 days listed
For rent · Condo rental · MLS #73598846
21 Beacon St #9L, Boston, MA
Listed by South End Realty Rental Team, South End Realty Group

Price per square foot at 21 Beacon St, quarter by quarter

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

$ per sq ft 1,157 (2026 Q3)

Beacon Hill typical, past 12 months: $1,296. Source: Verified market data; analysis by the Observer Markets Desk.

Show the numbers

Quarter	Typical $/sq ft	Sales
2025 Q4	$1,227	2
2026 Q1	$1,357	2
2026 Q3	$1,157	5

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	$450K (1)	$2,500 (4)	–
1 bedroom	$540K (7)	$3,000 (17)	6.7%

What soldPast 12 months, newest first

Closed	Unit	Size	Price	$/sq ft	vs. first ask
Sep 22	Unit 4GMLS #73525411 · Splice Realty	1 bed, 535 sq ft	$533,000	$996	−16.6%
Sep 14	Unit 11LMLS #73501842 · William Raveis R.E. & Home Services	1 bed, 325 sq ft	$507,500	$1,562	−11.7%
Sep 3	Unit 8GMLS #73533760 · Coldwell Banker Realty - Brookline	1 bed, 535 sq ft	$619,000	$1,157	−8.3%
Aug 14	Unit 2JMLS #73534387 · William Raveis R.E. & Home Services	1 bed, 588 sq ft	$565,000	$961	−2.6%
Jul 20	Unit 7MMLS #73512294 · Gibson Sotheby's International Realty	1 bed, 409 sq ft	$525,000	$1,284	−1.9%
Mar 31	Unit 5IMLS #73478381 · Coldwell Banker Realty - Boston	1 bed, 574 sq ft	$583,000	$1,016	−2.7%
Feb 12	Unit 6KMLS #73446196 · Forbes Real Estate	Studio, 265 sq ft	$450,000	$1,698	−4.3%
Dec 23	Unit 4SMLS #73377731 · Gibson Sotheby's International Realty	1 bed, 508 sq ft	$540,000	$1,063	−9.8%

Where it isWith nearby buildings we track

Questions people ask

How much do condos cost at 21 Beacon St?: In the past 12 months, 8 condos sold at 21 Beacon St (21 Beacon St, Boston) for a typical $536,500, or $1,110 per square foot. Sales ranged from $450,000 to $619,000.
How fast do condos sell at 21 Beacon St?: Units that sold in the past 12 months took a typical 70 days to get an accepted offer, and 0% sold for their first asking price or more. In Beacon Hill overall, it took 29 days.
What are the condo fees at 21 Beacon St?: The typical monthly condo fee at 21 Beacon St is $618, about $1.23 per square foot a month, based on the fees filed with its listings.
How many condos are for sale at 21 Beacon St right now?: 4 units are for sale, asking from $409,900 to $675,000.
What does it cost to rent at 21 Beacon St?: 21 units rented in the past 12 months, for a typical $3,000 a month. Studio: $2,500; 1 bedroom: $3,000.
When was 21 Beacon St built, and how many units does it have?: 21 Beacon St was built in 1899 and has 163 units, with homes up to the 11th floor, according to its listings.

About these numbers

Every figure on this page comes from verified market data for 21 Beacon 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: “21 Beacon St building report,” Boston Real Estate Observer, https://bostonrealestateobserver.com/buildings/boston/21-beacon-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.