343 Commonwealth Av 40, Boston — property record card

Residential Condominium built in 1880 in Boston, assessed at $7,214,300 for fiscal year 2023; last sold for $660,000 on October 29, 2021.

Rebuilt from the Boston assessor file as published by MassGIS — not the official card. For the official card, with owner, photo and sketch, ask the Boston assessor’s office.

Parcel

Location	343 Commonwealth Av 40, Boston MA 02115
Map and parcel ID	0503589000 0503589014
Use	Residential Condominium (use code 102)
County	Suffolk

Valuation — fiscal year 2023

Building	$7,214,300
Land	$0
Total assessed	$7,214,300

Building

Year built	1880
Style	Row Middle
Living area	1,827 ft²
Rooms	5
Stories	1

Last recorded sale

Price	$660,000
Date	October 29, 2021
Deed	Registry of Deeds book 66576, page 254

10 assessor accounts on this parcel

Condominium units or several buildings share one parcel; each has its own assessment.

Address	Account	Use	Assessed	Last sale
343 Commonwealth Av	0503589000	Other, Open Space	$0	nominal ($0) January 1, 1987
343 Commonwealth Av 10A	0503589004	Residential Condominium	$701,800	$1,162,000 July 31, 2012
343 Commonwealth Av 10B	0503589005	Residential Condominium	$1,406,900	$1,162,000 July 31, 2012
343 Commonwealth Av 21	0503589006	Residential Condominium	$689,100	$582,500 July 17, 2015
343 Commonwealth Av 22	0503589008	Residential Condominium	$663,200	$660,000 October 29, 2021
343 Commonwealth Av 31	0503589010	Residential Condominium	$777,000	$279,000 December 4, 1998
343 Commonwealth Av 32	0503589012	Residential Condominium	$652,500	$480,000 September 6, 2012
343 Commonwealth Av 40	0503589014	Residential Condominium	$1,765,500	nominal ($9) August 21, 2017
343 Commonwealth Av A	0503589002	Residential Condominium	$487,300	$335,000 April 27, 2012
343 Commonwealth Av Garage	0503589016	CONDO PARKING (RES)	$71,000	$50,000 July 31, 2012

What MassDEP has recorded

No tier-classified 21E site and no Activity and Use Limitation is mapped on this parcel.

Within about 500 m (a third of a mile): 0 active tier-classified 21E sites and 6 sites with an Activity and Use Limitation. All MassDEP sites in Boston.

What this means

Assessed 274% above the median residential condominium in Boston ($1,926,500, 10,170 parcels).
Built before 1978: the Massachusetts Lead Law applies when a child under six lives there; ask for any lead inspection or letter of compliance.

Point at the centre of the assessor parcel — not a survey.

Data: Boston assessor file for fiscal year 2023, via MassGIS, retrieved October 30, 2026; MassDEP sites retrieved the same day. Sources and freshness. No owner names are published.

First page of a sample Massachusetts Property Report

The report for 343 Commonwealth Av 40

This page shows the assessor record and the MassDEP sites on the parcel. The report adds what lies around it: FEMA flood zone, wetlands, Zone II and other water supply protection areas, priority habitat, sewer or septic service, protected open space, and every 21E site within half a mile.

$19card · PDF within 24 h · you pay after receiving itSee the sample (PDF)

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