18 Monument Sq 3, Boston — property record card

Residential Condominium built in 1855 in Boston, assessed at $3,608,200 for fiscal year 2023; last sold for $1,200,000 on November 22, 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	18 Monument Sq 3, Boston MA 02129
Map and parcel ID	0203036000 0203036006
Use	Residential Condominium (use code 102)
County	Suffolk

Valuation — fiscal year 2023

Building	$3,608,200
Land	$0
Total assessed	$3,608,200

Building

Year built	1855
Style	Row Middle
Living area	2,210 ft²
Rooms	6
Stories	2

Last recorded sale

Price	$1,200,000
Date	November 22, 2021
Deed	Registry of Deeds book 66718, page 29

4 assessor accounts on this parcel

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

Address	Account	Use	Assessed	Last sale
18 Monument Sq	0203036000	Other, Open Space	$0	nominal ($0) January 1, 1987
18 Monument Sq 1	0203036002	Residential Condominium	$1,035,400	$1,200,000 November 22, 2021
18 Monument Sq 2	0203036004	Residential Condominium	$711,300	$158,110 July 23, 1997
18 Monument Sq 3	0203036006	Residential Condominium	$1,861,500	nominal ($1) June 23, 2003

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): 1 active tier-classified 21E site and 1 site with an Activity and Use Limitation. All MassDEP sites in Boston.

What this means

Assessed 87% 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 18 Monument Sq 3

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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