403 River St, Waltham, MA 02453 Property Records

Middlesex County and Waltham City property record for 403 River St, Waltham, MA 02453

Property Summary

Property Type	Boarding House, Apartment Hotel
Details	20 bd · 9 ba · 5,985 sqft · built 1900
Lot Size	0.244 acres (10,642 sqft)
Owner	Company Name on Record
Last Sale	$2,100,000 (Apr 2021)
Tax Bill	$24,461 (2025)
Deeds & Mortgages	Dec 2023 Transfer Apr 2021 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`96942`

Property Details

APN / Parcel Number

Primary APN	`96942`
Alternative APN	`WALT M:060 B:031 L:0003`

Interior

Bedrooms	20 Beds
Full Baths	9 Baths
Total Rooms	30 Rooms
Units	24 Units
Stories	3 Stories
Building Area	5,985 sqft Living Area
Gross Area	8,507 sqft
Basement Area	1,980 sqft
Unfinished Basement	1,980 sqft

Exterior

Year Built	Built 1900
Effective Year Built	Effective 1900
Architectural Style	Other
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Roof Type	Mansard
Roof Material	Asphalt
Lot Area	10,642 sqft (0.244 acres)

Utilities, Heating & Cooling

Heating System	Steam
Heating Fuel	Oil

Location & Zoning

Account Number	96942
Street Address	403 RIVER ST
City	WALTHAM
State	MA
Zip	02453-5449
Property Category	Commercial
Property Type	Commercial > Retail > Boarding House, Apartment Hotel
Legal Block	31
Legal Lot Number	3
Jurisdiction	WALTHAM MA
Township / Civil Division	WALTHAM
Census Block Group	5
Census Block	5011
Census Tract	368800

Historic Designation

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

Individually Listed	Gilbrae Inn listed 1989 · 1 contributing resources · NRIS 89001550

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 April 14, 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	1408 BEACON ST, BROOKLINE, MA 02446-2089
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
Dec 1, 2023	Quit Claim Deed, Transfer Quitclaim
Apr 1, 2021	Quit Claim Deed, Transfer · Commercial Mortgage METRO CU

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Apr 1, 2021 · Amount on Record
Deed Sale	Apr 1, 2021 · Amount on Record
Prior Sale	Apr 3, 2000 · Amount on Record
Deed Document Number	202173688
Deed Book / Page	77403 / 518
Last Transfer Date	Nov 27, 2023
Transfer Doc	082269-225
Record Updated	Oct 29, 2026

December 2023: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	WALTHAM MA
Recording Date	Dec 1, 2023
Property Address	403 RIVER ST, WALTHAM, MA 02453-5449
Document Number	082269-225
Book / Page	82269 / 225
Instrument Date	Nov 27, 2023
Instrument	137541
Transaction Type	Transfer
Record Updated	Dec 15, 2023

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Quitclaim Intrafamily Transfer Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	56 GRAYMORE RD, WALTHAM, MA 02451-2202

April 2021: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	WALTHAM MA
Recording Date	Apr 1, 2021
Property Address	403 RIVER ST, WALTHAM, MA 02453-5449
Document Number	77403-518
Book / Page	77403 / 518
Instrument Date	Apr 1, 2021
Instrument	73688
Transaction Type	Transfer
Record Updated	May 12, 2021

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	375 HARVARD ST, BROOKLINE, MA 02446-2998

Mortgage

Document Number	73690
Date	Apr 1, 2021
Instrument	73690

Lender

Name	METRO CU
Type	Credit Union

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded

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
2025	$24,461.00 (+2.47%)	$2,490,900 (+0.59%) Land $392,600 Building $2,098,300
2024	$23,872.00 (+13.37%)	$2,476,400 (+21.37%) Land $390,100 Building $2,086,300
2023	$21,056.00	$2,040,300 Land $373,900 Building $1,666,400

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

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

Values are read at the parcel center point; 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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