$2,350,000

321 Commonwealth Ave Unit 40 Boston, MA 02115

Back Bay Neighborhood

Estimated payment $15,700/month

3 Beds
2 Baths
1,425 Sq Ft
$1,649 Price per Sq Ft

Highlights

  • Medical Services
  • 3-minute walk to Hynes Convention Center Station
  • Deck
  • Beethoven Elementary School Rated A-
  • Brownstone
  • Property is near public transit and schools

About This Home

On the sunny side of Commonwealth in a luxury building the bright and airy living/entertaining areas flow beautifully in an effortless open layout! Lofty ceilings contribute to the wonderful sense of space in a triple wide building. The home has expansive windows to take in the breathtaking Back Bay views. Wonderful layout grounded by stained hardwood floors. Framed in statuary marble the wood burning fireplace creates for focal point for gathering and living room space flowing into dining area with amazing natural light from the skylight above. The kitchen is beautifully outfitted with custom cabinetry, Dornbracht fixtures and Sub-zero appliances. Spacious Master Bedroom with walk-in closet and exquisite spa-like master bathroom with skylight, glass shower and Victoria & Albert soaking Tub. Upstairs you can find a private roof deck with fire pit hard plumed with natural gas and grill, perfect for entertaining. One parking spot included and an additional spot available for purchase.

Listing Agent

The Mazer Group

Compass Listed on: 09/08/2026

Compass

Co-Listing Agent

Allison Mazer

Compass

Co-Listing Agent

Tara Rostamnezhad

Compass

Property Details

Home Type

  • Condominium

Est. Annual Taxes

  • $17,524

Year Built

  • Built in 1880

HOA Fees

  • $1,273 Monthly HOA Fees

Home Design

  • Brownstone
  • Entry on the 3rd floor
  • Slate Roof

Interior Spaces

  • 1,425 Sq Ft Home
  • 1-Story Property
  • 1 Fireplace
  • Intercom

Kitchen

  • Oven
  • Range
  • Microwave
  • Freezer
  • Dishwasher
  • Disposal

Bedrooms and Bathrooms

  • 3 Bedrooms
  • 2 Full Bathrooms

Laundry

  • Laundry in unit
  • Dryer
  • Washer

Parking

  • 1 Car Parking Space
  • Deeded Parking

Utilities

  • Forced Air Heating and Cooling System
  • Hot Water Heating System

Additional Features

  • Deck
  • Property is near public transit and schools

Listing and Financial Details

  • Assessor Parcel Number W:05 P:03580 S:012,3348885

Community Details

Overview

  • Association fees include heat, electricity, gas, water, sewer
  • 7 Units

Amenities

  • Medical Services
  • Shops
  • Coin Laundry

Recreation

  • Park
  • Jogging Path
  • Bike Trail

Pet Policy

  • Pets Allowed

Property Details

Home Type

Condominium

Est. Annual Taxes

$17,524

Year Built

Built in 1880

Lot Details

1,307 Sq Ft Lot

HOA Fees

$1,273 per month

Listing Details

  • Property Type: Residential
  • Property Sub Type: Condominium
  • Structure Type: Brownstone
  • Year Built: 1880
  • Entry Level: 3
  • Year Built Details: Actual
  • MLSPIN_BEACHFRONT_FLAG: No
  • Special Features: None
  • Stories: 1

Interior Features

  • Entry Location: Unit Placement(Upper,Front)
  • Fireplace YN: Yes
  • Fireplaces: 1
  • Appliances: Range, Oven, Dishwasher, Disposal, Microwave, Refrigerator, Freezer, Washer, Dryer
  • Total Bedrooms: 3
  • Basement YN: No
  • Full Bathrooms: 2
  • Total Bathrooms: 2
  • Master Bathroom Features: Yes
  • Laundry Features: In Unit
  • Basement: N
  • Above Grade Finished Sq Ft: 1425
  • Living Area: 1425
  • Spa YN: No
  • Stories Total: 1
  • MAIN LO: AN2383

Exterior Features

  • Exterior Features: Deck - Roof
  • Home Warranty YN: No
  • Patio And Porch Features: Deck - Roof
  • Roof: Slate
  • Waterfront YN: No
  • Waterview Flag: No

Garage/Parking

  • Garage YN: No
  • Open Parking Spaces: 1
  • Parking Features: Deeded
  • Total Parking Spaces: 1

Utilities

  • Sewer: Public Sewer
  • Cooling: Central Air
  • Heating: Forced Air
  • Cooling Y N: Yes
  • Heating YN: Yes
  • Security Features: Intercom
  • Water Source: Public

Condo/Co-op/Association

  • Association Amenities: Hot Water
  • Association Fee: 1272.5
  • Association Fee Frequency: Monthly
  • Community Features: Public Transportation, Shopping, Park, Walk/Jog Trails, Medical Facility, Laundromat, Bike Path, Highway Access, House of Worship, Private School, Public School, T-Station, University
  • Senior Community YN: No
  • MANAGEMENT: Professional - Off Site

Fee Information

  • Association Fee Includes: Heat, Electricity, Gas, Water, Sewer

Lot Info

  • Parcel Number: W:05 P:03580 S:012,3348885
  • Zoning: CD
  • Farm Land Area Units: Square Feet
  • Lot Size Acres: 0.03
  • Lot Size Sq Ft: 1175
  • Lot Size Units: Acres
  • OUTDOOR SPACE AVAILABLE: Yes - Private

Rental Info

  • Pets Allowed: Yes

Tax Info

  • Tax Year: 2026
  • Tax Annual Amount: 17523.88

Multi Family

  • Number Of Units Total: 7
  • Basement Included Sq Ft: No

Map

Range of Values:

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Value Increase
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Home Values in the Area

Source: Public Records

Average Home Value in this Area





Source: Public Records

Tax History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $18,630 $1,608,800 $0 $1,608,800
2024 $17,536 $1,608,800 $0 $1,608,800
2023 $16,455 $1,532,100 $0 $1,532,100
2022 $16,343 $1,502,100 $0 $1,502,100
2021 $16,027 $1,502,100 $0 $1,502,100
2020 $14,941 $1,414,900 $0 $1,414,900
2019 $15,200 $1,442,100 $0 $1,442,100
2018 $14,841 $1,416,100 $0 $1,416,100
2017 $14,417 $1,361,400 $0 $1,361,400
2016 $13,995 $1,272,300 $0 $1,272,300
2015 $13,934 $1,150,600 $0 $1,150,600
2014 $12,902 $1,025,600 $0 $1,025,600
Source: Public Records

Property History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Event Price List to Sale Price per Sq Ft
09/08/2026 09/08/26 For Sale $2,350,000 -- $1,649 / Sq Ft
Source: MLS Property Information Network (MLS PIN)

Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Type Sale Price Title Company
Quit Claim Deed $1,375,000 --
Quit Claim Deed $1,270,000 --
Deed $1,130,000 --
Deed $1,025,000 --
Deed $1,040,000 --
Deed $696,000 --
Deed $538,800 --
Deed $449,900 --
Deed $213,560 --
Deed $150,000 --
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Loan Amount Loan Type
Open $889,000 Adjustable Rate Mortgage/ARM
Closed $1,100,000 Adjustable Rate Mortgage/ARM
Closed $720,000 Adjustable Rate Mortgage/ARM
Previous Owner $832,000 No Value Available
Source: Public Records

Source: MLS Property Information Network (MLS PIN)

MLS Number: 73572851

MLS Property Information Network (MLS PIN)

APN: CBOS-000000-000005-003580-000012

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