Property Record Card Massachusetts

9 Key St, Millis — property record card

Residential Condominium built in 1984 in Millis, assessed at $18,866,800 for fiscal year 2026; last transferred February 4, 2026 for a nominal sum.

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

Parcel

Location9 Key St, Millis MA 02054
Map and parcel ID16_067 16_067_I
UseResidential Condominium (use code 1020)
CountyNorfolk

Valuation — fiscal year 2026

Building$18,607,500
Land$0
Other$259,300
Total assessed$18,866,800

Building

Year built1984
StyleCondominium
Living area1,284 ft²
Units51

Last recorded sale

Pricenominal ($1)
DateFebruary 4, 2026

51 assessor accounts on this parcel

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

AddressAccountUseAssessedLast sale
1 Key St16_067_AResidential Condominium$359,700$95,000
June 10, 1985
2 Key St16_067_BResidential Condominium$349,300$103,500
March 31, 1997
3 Key St16_067_CResidential Condominium$357,400$390,000
April 29, 2024
4 Key St16_067_DResidential Condominium$387,500$275,000
April 23, 2019
5 Key St16_067_EResidential Condominium$362,500$350,000
December 29, 2022
6 Key St16_067_FResidential Condominium$347,700$252,000
April 28, 2019
7 Key St16_067_GResidential Condominium$349,300$221,000
October 19, 2007
8 Key St16_067_HResidential Condominium$406,200$400,000
October 11, 2023
9 Key St16_067_IResidential Condominium$439,900$277,000
May 24, 2018
10 Key St16_067_JResidential Condominium$386,900$375,000
March 23, 2022
11 Key St16_067_KResidential Condominium$376,100$224,500
February 21, 2003
12 Key St16_067_LResidential Condominium$336,100nominal ($1)
December 16, 2011
13 Key St16_067_MResidential Condominium$366,500$242,500
February 10, 2006
14 Key St16_067_NResidential Condominium$398,200$423,500
April 3, 2024
15 Key St16_067_OResidential Condominium$383,400$236,000
December 29, 2005
16 Key St16_067_PResidential Condominium$387,500$455,000
May 30, 2025
17 Key St16_067_QResidential Condominium$379,200nominal ($1)
October 18, 2023
18 Key St16_067_RResidential Condominium$405,100$401,000
May 23, 2022
19 Key St16_067_SResidential Condominium$365,200$360,000
June 29, 2022
20 Key St16_067_TResidential Condominium$403,500$371,000
November 4, 2024
21 Key St16_067_UResidential Condominium$386,400nominal ($1)
August 3, 2017
22 Key St16_067_VResidential Condominium$340,500$222,000
August 14, 2009
23 Key St16_067_WResidential Condominium$361,900nominal ($10)
September 9, 2015
24 Key St16_067_XResidential Condominium$375,200nominal ($1)
September 17, 2021
25 Key St16_067_YResidential Condominium$375,200$92,000
August 18, 1995
26 Key St16_067_ZResidential Condominium$358,800$239,900
February 16, 2005
27 Key St16_067_AAResidential Condominium$352,200$215,000
July 8, 2002
28 Key St16_067_BBResidential Condominium$355,200$352,000
October 30, 2023
29 Key St16_067_CCResidential Condominium$367,000nominal ($100)
October 21, 2022
30 Key St16_067_DDResidential Condominium$351,400$115,000
April 11, 1989
31 Key St16_067_EEResidential Condominium$348,500$212,500
June 29, 2007
32 Key St16_067_FFResidential Condominium$357,300nominal ($10)
June 17, 2021
33 Key St16_067_GGResidential Condominium$344,600$195,000
April 3, 2002
34 Key St16_067_HHResidential Condominium$375,200$102,500
May 30, 1990
35 Key St16_067_IIResidential Condominium$424,900nominal ($1)
March 19, 2019
36 Key St16_067_JJResidential Condominium$340,500$136,000
November 16, 2000
37 Key St16_067_KKResidential Condominium$357,400$370,000
November 21, 2024
38 Key St16_067_LLResidential Condominium$365,700$310,000
March 18, 2021
39 Key St16_067_MMResidential Condominium$386,900$320,000
September 9, 2021
40 Key St16_067_NNResidential Condominium$375,200nominal ($1)
February 4, 2026
41 Key St16_067_OOResidential Condominium$340,400nominal ($1)
August 3, 2023
42 Key St16_067_PPResidential Condominium$340,500nominal ($1)
October 21, 2025
43 Key St16_067_QQResidential Condominium$375,200$125,000
October 30, 1986
44 Key St16_067_RRResidential Condominium$424,400$325,000
December 15, 2021
45 Key St16_067_SSResidential Condominium$354,000$285,000
September 16, 2020
46 Key St16_067_TTResidential Condominium$333,800nominal ($100)
January 25, 2017
47 Key St16_067_UUResidential Condominium$361,800$410,000
July 22, 2025
48 Key St16_067_VVResidential Condominium$367,900$215,000
November 27, 2002
49 Key St16_067_WWResidential Condominium$375,100$186,000
May 25, 2012
50 Key St16_067_XXResidential Condominium$375,200nominal ($10)
May 1, 2013
51 Key St16_067_YYResidential Condominium$371,300$234,000
November 25, 2003

What MassDEP has recorded

No tier-classified 21E site and no Activity and Use Limitation is mapped on this parcel.

What this means

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

Data: Millis 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 9 Key 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.

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