12 Keswick St 4, Boston — property record card

Residential Condominium built in 1900 in Boston, assessed at $3,409,200 for fiscal year 2023; last sold for $850,000 on May 16, 2022.

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	12 Keswick St 4, Boston MA 02215
Map and parcel ID	2100089000 2100089008
Use	Residential Condominium (use code 102)
County	Suffolk

Valuation — fiscal year 2023

Building	$3,409,200
Land	$0
Total assessed	$3,409,200

Building

Year built	1900
Style	Row Middle
Living area	1,329 ft²
Rooms	5
Stories	2

Last recorded sale

Price	$850,000
Date	May 16, 2022
Deed	Registry of Deeds book 67647, page 332

5 assessor accounts on this parcel

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

Address	Account	Use	Assessed	Last sale
12 Keswick St	2100089000	Other, Open Space	$0	nominal ($0) March 13, 1989
12 Keswick St 1	2100089002	Residential Condominium	$708,100	$850,000 May 16, 2022
12 Keswick St 2	2100089004	Residential Condominium	$726,600	$749,000 June 17, 2020
12 Keswick St 3	2100089006	Residential Condominium	$829,700	$810,000 November 25, 2020
12 Keswick St 4	2100089008	Residential Condominium	$1,144,800	$1,220,000 March 31, 2021

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): 2 active tier-classified 21E sites and 5 sites with an Activity and Use Limitation. All MassDEP sites in Boston.

What this means

Assessed 77% 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 12 Keswick St 4

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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