20 Cooper St, Waltham, MA 02453 Property Records

Middlesex County and Waltham City property record for 20 Cooper St, Waltham, MA 02453

Property Summary

Property Type	Apartments (5+ Units)
Details	20 bd · 30 ba · 165,986 sqft · built 2019
Lot Size	4.32 acres (188,179 sqft)
Owner	Company Name on Record
Last Sale	$139,000,000 (Dec 2020)
Tax Bill	$1,199,473 (2026)
Deeds & Mortgages	May 2021 Refinance Dec 2020 Sale
Flood Zone	Zone X (minimal risk)
APN	`36419`

Property Details

APN / Parcel Number

Primary APN	`36419`
Alternative APN	`WALT M:060 B:029 L:0002`

Interior

Bedrooms	20 Beds
Full Baths	30 Baths
Half Baths	20 Half Baths
Total Rooms	80 Rooms
Units	577 Units
Stories	5 Stories
Building Area	165,986 sqft Living Area
Gross Area	216,280 sqft
Basement Area	33,734 sqft
Unfinished Basement	33,734 sqft

Exterior

Year Built	Built 2019
Effective Year Built	Effective 2019
Exterior Material	Brick
Construction Type	Frame
Roof Type	Flat
Roof Material	Other
Lot Area	188,179 sqft (4.32 acres)
Garage Type	Attached

Utilities, Heating & Cooling

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

Location & Zoning

Account Number	36419
Street Address	20 COOPER ST
City	WALTHAM
State	MA
Zip	02453-5489
Property Category	Residential
Property Type	Residential > Multi-Unit > Apartments (5+ Units)
Legal Subdivision	WALTHAM
Legal Block	29
Legal Lot Number	2
Jurisdiction	WALTHAM MA
Township / Civil Division	WALTHAM
Census Block Group	1
Census Block	1000
Census Tract	368500

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Individually Listed	Waltham Gas Light Company listed 1989 · 1 contributing resources · NRIS 89001506

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

Owner

Source: Middlesex County and Waltham 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	PO BOX 4900, SCOTTSDALE, AZ 85261-4900
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
May 27, 2021	Deed of Trust, Mortgage · Stand-Alone Refinance THRIVENT FINANCIAL BANK
Dec 1, 2020	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 1, 2020 · Amount on Record
Deed Sale	Dec 1, 2020 · Amount on Record
Prior Sale	Jan 28, 2016 · Amount on Record
Deed Document Number	2020227132
Deed Book / Page	76313 / 112
Record Updated	Oct 29, 2026

May 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WALTHAM MA
Property Address	20 COOPER ST, WALTHAM, MA 02453-5489
Transaction Type	Mortgage
Record Updated	Jan 26, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	077877-210
Date	May 27, 2021
Book Page	77877/210
Instrument	120642

Lender

Name	THRIVENT FINANCIAL BANK
Type	Bank

Agreement

Type	Stand-Alone Refinance
Amount	Amount Recorded
Term	121 Months
Due	Jun 1, 2031

December 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	WALTHAM MA
Recording Date	Dec 1, 2020
Property Address	20 COOPER ST, WALTHAM, MA 02453-5489
Document Number	76313-112
Book / Page	076313 / 000112
Instrument Date	Dec 1, 2020
Instrument	227132
Transaction Type	Transfer
Record Updated	Dec 22, 2020
Title Company	NOT AVAILABLE

Transaction

Amount	Amount Recorded
Tax	$633,840.00
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	125 HIGH ST #27THFL BOSTON MA 021102704, 27THFL, BOSTON, MA 02110-2704

Tax Assessment & Valuation

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026	$1,199,473.00 (+5.09%)	$999,999,999 (+760.38%) Land $30,888,000 Building $85,340,000
2025	$1,141,359.00 (+17.27%)	$116,228,000 (+15.12%) Land $30,888,000 Building $85,340,000
2024	$973,241.00 (+5.77%)	$100,958,600 (+13.24%) Land $28,116,000 Building $72,842,600
2023	$920,105.00	$89,157,500 Land $25,476,000 Building $63,681,500

Assessed value is set for property tax purposes and is not a market price estimate.

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
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
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	WALTHAM WATER DEPARTMENT serves 65,218 people · EPA ID MA3308000
Water Source	Purchased surface water from MWRA
Last State Inspection	Jun 2024
Lead	2 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	1 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 591 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Verizon Fiber · Fixed Wireless in parts of the area	2,300 / 2,300
Xfinity Cable · Fiber in parts of the area	2,000 / 2,000
Astound Broadband Cable	1,500 / 50

May also be available: AT&T, T-Mobile.

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