50 Alder St, Waltham — property record card

Residential Condominium built in 1860 in Waltham, assessed at $4,517,000 for fiscal year 2026; last sold for $700,000 on April 10, 2025.

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

Parcel

Location	50 Alder St
Map and parcel ID	R069 035 0010 042 R069 035 0010 050
Use	Residential Condominium (use code 102)
County	Middlesex

Valuation — fiscal year 2026

Building	$4,517,000
Land	$0
Total assessed	$4,517,000

Building

Year built	1860
Style	CONDO-TNHS
Living area	1,111 ft²
Rooms	5
Stories	2
Units	8

Last recorded sale

Price	$700,000
Date	April 10, 2025
Deed	Registry of Deeds book 83954, page 146

8 assessor accounts on this parcel

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

Address	Account	Use	Assessed	Last sale
42 Alder St	R069 035 0010 042	Residential Condominium	$583,300	nominal ($10) May 13, 2022
44 Alder St	R069 035 0010 044	Residential Condominium	$537,400	nominal ($100) October 13, 2023
46 Alder St	R069 035 0010 046	Residential Condominium	$585,000	$515,000 November 1, 2018
48 Alder St	R069 035 0010 048	Residential Condominium	$539,400	$170,450 August 3, 1999
50 Alder St	R069 035 0010 050	Residential Condominium	$604,900	$700,000 April 10, 2025
52 Alder St	R069 035 0010 052	Residential Condominium	$536,900	$183,000 January 6, 2000
54 Alder St	R069 035 0010 054	Residential Condominium	$545,700	nominal ($1) May 22, 2002
56 Alder St	R069 035 0010 056	Residential Condominium	$584,400	$120,000 June 18, 1998

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 1 site with an Activity and Use Limitation. All MassDEP sites in Waltham.

What this means

Assessed 165% above the median residential condominium in Waltham ($1,705,450, 642 parcels).
The last sale price is 85% 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: Waltham 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 50 Alder St

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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