166 Main St, Watertown, MA 02472 Property Records

Middlesex County and Watertown City property record for 166 Main St, Watertown, MA 02472

Property Summary

Property Type	Mixed Use Commercial Office / Residential
Details	20 bd · 3.5 ba · 29,424 sqft · built 2022
Lot Size	0.376 acres (16,396 sqft)
Owner	Company Name on Record
Last Sale	$1,550,000 (Jun 2020)
Tax Bill	$124,082 (2026)
Deeds & Mortgages	Apr 2022 Refinance Jun 2020 Sale
Flood Zone	Zone X (minimal risk)
APN	`102010-12`

Property Details

APN / Parcel Number

Primary APN	`102010-12`
Alternative APNs	`WATE M:0205 B:0034 L:0000` `4398`

Interior

Bedrooms	20 Beds
Full Baths	3.5 Baths
Half Baths	5 Half Baths
Total Rooms	97 Rooms
Units	27 Units
Stories	5 Stories
Building Area	29,424 sqft Total Area
Gross Area	38,974 sqft
Basement Area	900 sqft
Unfinished Basement	900 sqft

Exterior

Year Built	Built 2022
Effective Year Built	Effective 2022
Exterior Material	Brick
Construction Type	Steel Frame
Roof Type	Flat
Roof Material	Other
Lot Area	16,396 sqft (0.376 acres)

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Forced Air with A/C
Heating Fuel	Gas

Location & Zoning

Account Number	4398
Street Address	166 MAIN ST
City	WATERTOWN
State	MA
Zip	02472-4430
Property Category	Commercial
Property Type	Commercial > Office > Mixed Use Commercial Office / Residential
Local Zoning Code	CB
Legal Block	34
Jurisdiction	WATERTOWN MA
Township / Civil Division	WATERTOWN TOWN
Census Block Group	3
Census Block	3005
Census Tract	370103

Owner

Source: Middlesex County and Watertown City records, as of October 20, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Company Name on Record
Mailing Address	275 WASHINGTON ST, 110, NEWTON, MA 02458-1685
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
Apr 29, 2022	Deed of Trust, Mortgage · Stand-Alone Refinance BROOKLINE BANK
Jun 5, 2020	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jun 5, 2020 · Amount on Record
Deed Sale	Jun 5, 2020 · Amount on Record
Deed Document Number	20201843468
Prior Transfer Date	May 28, 2020
Prior Transfer Doc	0001843468
Record Updated	Oct 29, 2026

April 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WATERTOWN MA
Property Address	166 MAIN ST, WATERTOWN, MA 02472
Transaction Type	Mortgage
Record Updated	May 16, 2024

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0001912780
Date	Apr 29, 2022
Instrument	1912780

Lender

Name	BROOKLINE BANK

Agreement

Type	Stand-Alone Refinance
Amount	Amount Recorded

June 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	WATERTOWN MA
Recording Date	Jun 5, 2020
Property Address	166 MAIN ST, WATERTOWN, MA 02472
Document Number	0001843468
Instrument Date	May 28, 2020
Instrument	1843468
Transaction Type	Transfer
Record Updated	Jun 23, 2020
Title Company	NOT AVAILABLE

Transaction

Amount	Amount Recorded
Tax	$7,068.00
Amount Accuracy	Confirmed
Additional	Quitclaim Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	41 SEYON ST WALTHAM MA 024538346, WALTHAM, MA 02453-8346

Tax Assessment & Valuation

Source: Middlesex County and Watertown City assessment roll, as of April 14, 2026

Property Jurisdictions

Type	Name
State	Massachusetts
County	Middlesex County
Municipality	Watertown City
Unified School District	Watertown School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$124,082.00	$10,170,624 (+6.67%) Land $2,970,240 Building $7,200,384	$1,854,658
2025		$9,534,300 (+46.04%) Land $3,094,000 Building $6,440,300
2024		$6,528,400 (+110.77%) Land $3,094,000 Building $3,434,400
2023	$42,063.00	$3,097,400 Land $3,094,000 Building $3,400

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	1 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	WATERTOWN DEPARTMENT OF PUBLIC WORKS serves 35,985 people · EPA ID MA3314000
Water Source	Purchased surface water from MWRA
Last State Inspection	Oct 2025
Lead	1 ppb (2025) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 610 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable · Fiber in parts of the area	2,000 / 2,000
Astound Broadband Cable · Fiber in parts of the area	1,500 / 50
Verizon Fiber · Fixed Wireless in parts of the area	980 / 880
AT&T Fixed Wireless	100 / 20

May also be available: T-Mobile.

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