1 Blackstone St #1, Cambridge — property record card

Residential Condominium built in 1916 in Cambridge, assessed at $3,363,100 for fiscal year 2026; last sold for $1,310,000 on October 25, 2024.

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

Parcel

Location	1 Blackstone St #1, Cambridge MA 02139
Map and parcel ID	129-48 129-48-1
Use	Residential Condominium (use code 102)
County	Middlesex

Valuation — fiscal year 2026

Building	$3,363,100
Land	$0
Total assessed	$3,363,100

Building

Year built	1916
Style	FLAT
Living area	1,189 ft²
Rooms	10
Stories	2
Units	4

Last recorded sale

Price	$1,310,000
Date	October 25, 2024
Deed	Registry of Deeds book 83392, page 0481

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
1 Blackstone St	129-48	CONDO-BLDG	$0	nominal ($1) December 1, 2014
1 Blackstone St #1	129-48-1	Residential Condominium	$1,336,300	nominal ($0) April 20, 2017
1 Blackstone St #2	129-48-2	Residential Condominium	$999,600	$1,310,000 October 25, 2024
1 Blackstone St #3	129-48-3	Residential Condominium	$1,027,200	$1,245,000 August 12, 2024

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): 7 active tier-classified 21E sites and 4 sites with an Activity and Use Limitation. All MassDEP sites in Cambridge.

What this means

Assessed 15% above the median residential condominium in Cambridge ($2,924,050, 2,506 parcels).
The last sale price is 61% below the current assessment. Massachusetts assessments aim at full market value as of January 1 of the year before the fiscal year.
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: Cambridge assessor file for fiscal year 2026, 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 1 Blackstone St #1

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)

Order the report