Property Record Card Massachusetts

500 Union St, Westborough — property record card

Residential Condominium built in 2007 in Westborough, assessed at $21,280,400 for fiscal year 2026; last sold for $517,125 on June 13, 2025.

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

Parcel

Location500 Union St, Westborough MA 01581
Map and parcel ID21-232-0 21-232-5410
UseResidential Condominium (use code 102)
CountyWorcester

Valuation — fiscal year 2026

Building$21,280,400
Land$0
Total assessed$21,280,400

Building

Year built2007
StyleCONDO-GRDN
Living area1,532 ft²
Rooms4
Stories1

Last recorded sale

Price$517,125
DateJune 13, 2025
DeedRegistry of Deeds book 72116, page 329

45 assessor accounts on this parcel

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

AddressAccountUseAssessedLast sale
500 Union St21-232-5206Residential Condominium$504,400$357,000
July 9, 2015
500 Union St21-232-5212Residential Condominium$499,800$240,000
April 29, 2009
500 Union St21-232-5303Residential Condominium$489,900$252,100
April 15, 2009
500 Union St21-232-5304Residential Condominium$499,800$535,000
October 25, 2024
500 Union St21-232-5305Residential Condominium$499,000nominal ($100)
June 5, 2025
500 Union St21-232-5306Residential Condominium$507,800$401,000
June 10, 2019
500 Union St21-232-5201Residential Condominium$497,800nominal ($100)
February 28, 2018
500 Union St21-232-5202Residential Condominium$501,900$440,000
January 8, 2021
500 Union St21-232-5203Residential Condominium$492,100$517,125
June 13, 2025
500 Union St21-232-5204Residential Condominium$502,000$458,000
August 27, 2021
500 Union St21-232-5205Residential Condominium$499,000$335,000
December 12, 2014
500 Union St21-232-5210Residential Condominium$506,400$353,000
December 2, 2015
500 Union St21-232-5211Residential Condominium$499,000$265,000
January 20, 2009
500 Union St21-232-5214Residential Condominium$493,200$401,000
April 2, 2019
500 Union St21-232-5216Residential Condominium$493,500$500,000
July 21, 2023
500 Union St21-232-5301Residential Condominium$495,600$352,000
July 21, 2015
500 Union St21-232-5302Residential Condominium$499,600$288,850
February 10, 2009
500 Union St21-232-5307Residential Condominium$380,600nominal ($100)
February 8, 2023
500 Union St21-232-5308Residential Condominium$388,600$275,000
December 3, 2018
500 Union St21-232-5309Residential Condominium$380,600$199,900
February 20, 2009
500 Union St21-232-5310Residential Condominium$507,200$400,000
May 4, 2018
500 Union St21-232-5416Residential Condominium$496,800$525,000
May 28, 2025
500 Union St21-232-5402Residential Condominium$500,300$285,000
September 11, 2009
500 Union St21-232-5403Residential Condominium$491,000$265,000
January 20, 2009
500 Union St21-232-5415Residential Condominium$502,400$305,000
December 30, 2009
500 Union St21-232-5312Residential Condominium$499,800$408,000
July 31, 2019
500 Union St21-232-5314Residential Condominium$489,900$500,000
April 30, 2024
500 Union St21-232-5315Residential Condominium$501,700nominal ($100)
March 30, 2016
500 Union St21-232-5316Residential Condominium$493,500$275,000
December 18, 2009
500 Union St21-232-5401Residential Condominium$495,600nominal ($100)
November 8, 2010
500 Union St21-232-5404Residential Condominium$499,800$560,000
May 22, 2025
500 Union St21-232-5407Residential Condominium$385,900$428,000
September 13, 2024
500 Union St21-232-5408Residential Condominium$392,600$425,000
April 30, 2024
500 Union St21-232-5409Residential Condominium$385,900$206,700
January 30, 2009
500 Union St21-232-5410Residential Condominium$508,200$285,140
February 27, 2009
500 Union St21-232-5411Residential Condominium$500,200nominal ($100)
August 10, 2018
500 Union St21-232-5412Residential Condominium$499,800$300,000
December 18, 2012
500 Union St21-232-5414Residential Condominium$491,000$505,000
February 28, 2025
500 Union St21-232-0Other, Open Space$0nominal ($0)
January 5, 2009
500 Union St21-232-5209Residential Condominium$499,600$279,900
June 15, 2009
500 Union St21-232-5311Residential Condominium$499,000nominal ($100)
January 15, 2020
500 Union St21-232-5406Residential Condominium$505,400$312,700
February 4, 2009
500 Union St21-232-5215Residential Condominium$501,700nominal ($100)
July 29, 2021
500 Union St21-232-5405Residential Condominium$500,200$275,000
March 30, 2009
500 Union St21-232-5207Residential Condominium$502,300$372,000
January 23, 2018

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 6 sites with an Activity and Use Limitation. All MassDEP sites in Westborough.

What this means

Point at the centre of the assessor parcel — not a survey.

Data: Westborough 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 500 Union 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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