34 Tremont St #12, Chelsea — property record card

Condo NL MDL-05 built in 1900 in Chelsea, assessed at $9,630,900 for fiscal year 2026; last sold for $435,000 on July 28, 2025.

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

Parcel

Location	34 Tremont St #12, Chelsea MA 02150
Map and parcel ID	11-90 11-90M
Use	Condo NL MDL-05 (use code 1021)
County	Suffolk

Valuation — fiscal year 2026

Building	$9,623,100
Land	$0
Other	$7,800
Total assessed	$9,630,900

Building

Year built	1900
Style	Condominium
Living area	1,137 ft²
Rooms	5
Units	21

Last recorded sale

Price	$435,000
Date	July 28, 2025
Deed	Registry of Deeds book 71685, page 173

21 assessor accounts on this parcel

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

Address	Account	Use	Assessed	Last sale
16 Beacon St #4	11-90D	Condo NL MDL-05	$414,600	$115,000 September 7, 2001
16 Beacon St #5	11-90E	Condo NL MDL-05	$555,200	$256,000 October 10, 2003
16 Beacon St #10	11-90K	Condo NL MDL-05	$524,000	$549,000 September 6, 2024
16 Beacon St #11	11-90L	Condo NL MDL-05	$442,400	$409,000 July 27, 2022
16 Beacon St #14	11-90P	Condo NL MDL-05	$525,900	$115,000 August 3, 1998
16 Beacon St #15	11-90R	Condo NL MDL-05	$444,400	$204,000 September 17, 2013
16 Beacon St #19	11-90V	Condo NL MDL-05	$537,700	$315,000 July 31, 2015
16 Beacon St #20	11-90W	Condo NL MDL-05	$408,900	$435,000 July 28, 2025
16-22 Beacon St	11-90	Other, Open Space	$0
18 Beacon St #3	11-90C	Condo NL MDL-05	$499,100	nominal ($1) February 1, 2023
20 Beacon St #2	11-90B	Condo NL MDL-05	$371,400	$280,000 March 20, 2018
20 Beacon St #9	11-90J	Condo NL MDL-05	$375,400	$190,000 September 30, 2015
20 Beacon St #13	11-90N	Condo NL MDL-05	$379,500	$350,000 October 30, 2024
20 Beacon St #18	11-90U	Condo NL MDL-05	$409,700	$65,000 November 19, 1998
22 Beacon St #1	11-90A	Condo NL MDL-05	$400,900	$349,000 June 29, 2021
22 Beacon St #8	11-90H	Condo NL MDL-05	$507,700	$430,000 September 3, 2021
22 Beacon St #17	11-90T	Condo NL MDL-05	$412,400	$206,000 October 30, 2015
34 Tremont St #6	11-90F	Condo NL MDL-05	$579,400	$485,000 August 18, 2021
34 Tremont St #7	11-90G	Condo NL MDL-05	$615,100	$525,000 April 16, 2021
34 Tremont St #12	11-90M	Condo NL MDL-05	$661,800	$600,000 May 12, 2023
34 Tremont St #16	11-90S	Condo NL MDL-05	$565,400	$599,000 December 16, 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): 0 active tier-classified 21E sites and 2 sites with an Activity and Use Limitation. All MassDEP sites in Chelsea.

What this means

Assessed 602% above the median condo nl mdl-05 in Chelsea ($1,371,500, 256 parcels).
The last sale price is 95% 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: Chelsea 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 34 Tremont St #12

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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