300 Commonwealth Ave, Boston, MA 02115 Property Records

Suffolk County and Boston City property record for 300 Commonwealth Ave, Boston, MA 02115

Property Summary

Property Type	Single Family Home
Details	4 bd · 5 ba · 7,430 sqft · built 1890
Lot Size	0.071 acres (3,112 sqft)
Owner	2 Individual Names on File
Last Sale	$1,170,916 (Jun 1995)
Tax Bill	$92,130 (2025)
Deeds & Mortgages	Sep 2023 Refinance Aug 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`CBOS W:05 P:03072 S:000`

Property Details

APN / Parcel Number

Primary APN	`CBOS W:05 P:03072 S:000`

Interior

Bedrooms	4 Beds
Full Baths	5 Baths
Half Baths	2 Half Baths
Total Rooms	14 Rooms
Stories	4 Stories
Building Area	7,430 sqft Living Area
Gross Area	7,929 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1890
Effective Year Built	Effective 2017
Architectural Style	Other
Exterior Material	Brick
Roof Type	Mansard
Roof Material	Slate
Lot Area	3,112 sqft (0.071 acres)
Parking Spaces	3 Parking Spaces

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Forced Air with A/C

Location & Zoning

Street Address	300 COMMONWEALTH AVE
City	BOSTON
State	MA
Zip	02115-2401
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Jurisdiction	BOSTON MA
Township / Civil Division	BOSTON
Census Block Group	3
Census Block	3001
Census Tract	10701

Historic Designation

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

Historic District	Within the Back Bay Historic District listed 1973 · 1,445 contributing resources · NRIS 73001948

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

Owner

300 Commonwealth Ave is owned and occupied by two individuals who bought it in June 1995.

Source: Suffolk County and Boston City records, as of July 20, 2026

Owner of Record	2 Individual Names on File
Mailing Address	300 COMMONWEALTH AVE, BOSTON, MA 02115-2401
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Et Al (and Others)

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Sep 8, 2023	Deed of Trust, Mortgage · Stand-Alone Refinance JPMORGAN CHASE BANK NA
Aug 20, 2020	Deed of Trust, Mortgage W BLUMENTHAL T THOMAS

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 30, 1995 · Amount on File
Deed Sale	Jun 30, 1995 · Amount on File
Prior Sale	Jul 22, 1987 · Amount on File
Deed Book / Page	19857 / 118
Record Updated	Sep 20, 2026

September 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOSTON MA
Property Address	300 COMMONWEALTH AVE, BOSTON, MA 02115-2401
Transaction Type	Mortgage
Record Updated	Sep 22, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	069413-308
Date	Sep 8, 2023
Book Page	69413/308
Instrument	57122

Lender

Name	JPMORGAN CHASE BANK NA
Type	Bank

Agreement

Type	Stand-Alone Refinance
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2053

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOSTON MA
Property Address	300 COMMONWEALTH AVE, BOSTON, MA 02115-2401
Document Number	53284-166
Instrument Date	Aug 20, 2020
Transaction Type	Mortgage
Record Updated	Oct 1, 2020
Title Company	NOT AVAILABLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Trust
Address	300 COMMONWEALTH AVE BOSTON MA 021152401, BOSTON, MA 02115-2401

Mortgage

Document Number	53284-166
Date	Aug 20, 2020
Book Page	053284/000166
Instrument	75520

Lender

Name	W BLUMENTHAL T THOMAS

Agreement

Amount	Amount on Record

Tax Assessment & Valuation

The 2025 property tax bill for 300 Commonwealth Ave was $92,130, down 2.3% from the year before.

Source: Suffolk County and Boston City assessment roll, as of April 14, 2026

Property Jurisdictions

Type	Name
State	Massachusetts
County	Suffolk County
Municipality	Boston City
Unified School District	Boston School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$92,130.00 (-2.31%)	$7,956,000 (-8.05%) Land $2,615,400 Building $5,340,600	$8,583,250 (+11.24%)
2024	$94,311.00 (+1.49%)	$8,652,400 (-) Land $2,426,800 Building $6,225,600	$7,715,900
2023	$92,927.00	$8,652,400 Land $2,426,800 Building $6,225,600

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

Flood

FEMA maps place 300 Commonwealth Ave in Zone X, an area of minimal flood risk, though there have been 3 flood claims nearby since 1978.

Source: FEMA National Flood Hazard Layer, effective January 21, 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
Community Rating System	Class 10 (0% premium discount)
Nearby Flood Policies	2 in force
Nearby Flood Claims	3 (1978)
Most Recent Claim	Jul 1978 · rainfall accumulation

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

The area around 300 Commonwealth Ave has no burnable land within ember reach, so its wildfire risk is not rated.

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	BOSTON WATER AND SEWER COMMISSION (MWRA) serves 675,647 people · EPA ID MA3035000
Water Source	Purchased surface water from MWRA
Last State Inspection	Mar 2026
Lead	6 ppb (2026) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	Lead service line replacement currently in violation since Nov 2020
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 684 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
Verizon Fiber · Fixed Wireless in parts of the area	980 / 880
Starry Fixed Wireless · Fiber in parts of the area	800 / 100
T-Mobile Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Astound Broadband, Netafy.

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