12 Mason Ter, Brookline, MA 02446 Property Records

Norfolk County and Brookline Town property record for 12 Mason Ter, Brookline, MA 02446

Property Summary

Property Type	Single Family Home
Details	7 bd · 5.5 ba · 5,900 sqft · built 1900
Lot Size	0.435 acres (18,970 sqft)
Owner	Trust Name on File
Last Sale	$1,295,000 (Oct 2000)
Tax Bill	$48,020 (2026)
Deeds & Mortgages	Feb 2017 Mortgage Mar 2019 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`3379024`

Property Details

APN / Parcel Number

Primary APN	`3379024`
Alternative APN	`BROO B:088 L:0016 S:0037`

Interior

Bedrooms	7 Beds
Full Baths	5.5 Baths
Half Baths	1 Half Bath
Total Rooms	18 Rooms
Stories	3 Stories
Building Area	5,900 sqft Living Area
Gross Area	9,724 sqft
Basement Area	2,436 sqft
Unfinished Basement	588 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1900
Effective Year Built	Effective 1987
Architectural Style	Other
Exterior Material	Wood Siding
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	18,970 sqft (0.435 acres)

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Hot Water
Heating Fuel	Gas

Location & Zoning

Account Number	3379024
Street Address	12 MASON TER
City	BROOKLINE
State	MA
Zip	02446-2604
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	SC7
Legal Subdivision	BROOKLINE
Legal Block	88
Legal Lot Number	16
Jurisdiction	BROOKLINE MA
Township / Civil Division	BROOKLINE
Census Block Group	2
Census Block	2003
Census Tract	400402

Owner

12 Mason Ter is owner-occupied and held in a trust since September 2020.

Source: Norfolk County and Brookline Town records, as of October 20, 2026

Owner of Record	Trust Name on File
Mailing Address	12 MASON TER, BROOKLINE, MA 02446-2604
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Trust

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
Feb 1, 2017	Deed of Trust, Mortgage BROOKLINE BANK
Mar 25, 2019	Deed of Trust, Mortgage · ARM ALLY BANK
Aug 7, 2020	Deed of Trust, Mortgage · ARM THIRD FEDERAL SAVING & LOAN ASSOC
Oct 22, 2020	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 24, 2000 · Amount on File
Deed Sale	Oct 24, 2000 · Amount on File
Prior Sale	May 28, 1991 · Amount on File
Last Transfer Date	Sep 25, 2020
Transfer Doc	38505-457
Record Updated	Oct 29, 2026

February 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BROOKLINE MA
Property Address	12 MASON TER, BROOKLINE, MA 02446-2604
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	34889-556
Date	Feb 1, 2017
Book Page	34889/556
Instrument	10306

Lender

Name	BROOKLINE BANK

Agreement

Amount	Amount on Record

March 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BROOKLINE MA
Property Address	12 MASON TER, BROOKLINE, MA 02446-2604
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	36682-445
Date	Mar 25, 2019
Book Page	36682/445
Instrument	21015

Lender

Name	ALLY BANK
Type	Bank

Agreement

Type	ARM
Amount	Amount on Record
Term	361 Months
Due	Apr 1, 2049

Interest

Rate Type	Adjustable Rate
Type Change Date	Apr 1, 2026

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BROOKLINE MA
Property Address	12 MASON TER, BROOKLINE, MA 02446-2604
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	38186-386
Date	Aug 7, 2020
Book Page	38186/386
Instrument	79271

Lender

Name	THIRD FEDERAL SAVING & LOAN ASSOC

Agreement

Type	ARM
Amount	Amount on Record
Term	361 Months
Due	Sep 1, 2050

Interest

Rate Type	Adjustable Rate
Rate	2.64%
Type Change Date	Jan 9, 2025

October 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BROOKLINE MA
Recording Date	Oct 22, 2020
Property Address	12 MASON TER, BROOKLINE, MA 02446-2604
Document Number	38505-457
Book / Page	038505 / 000457
Instrument Date	Sep 25, 2020
Instrument	114996
Transaction Type	Transfer
Record Updated	Nov 10, 2020
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	12 MASON TER BROOKLINE MA 024462604, BROOKLINE, MA 02446-2604

Tax Assessment & Valuation

The 2026 property tax bill for 12 Mason Ter was $48,020, up 3% from the year before.

Source: Norfolk County and Brookline Town assessment roll, as of April 14, 2026

Property Jurisdictions

Type	Name
State	Massachusetts
County	Norfolk County
County Subdivision	Brookline Town
Unified School District	Brookline School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$48,020.00 (+2.97%)	$4,689,500 (-0.75%) Land $1,635,100 Building $3,054,400	$3,825,080 (-)
2025	$46,636.00 (+4.91%)	$4,725,000 (+3.85%) Land $1,618,900 Building $3,106,100	$3,825,080 (+3.58%)
2024	$44,452.00 (+4.92%)	$4,549,800 (+7.07%) Land $1,560,600 Building $2,989,200	$3,692,745
2023	$42,366.00	$4,249,300 Land $1,361,200 Building $2,888,100

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

Flood

FEMA maps place 12 Mason Ter in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective May 26, 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

The area around 12 Mason Ter 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	BROOKLINE WATER AND SEWER DIVISION serves 63,191 people · EPA ID MA3046000
Water Source	Purchased surface water from MWRA
Last State Inspection	Apr 2026
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 720 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	1,500 / 50
Verizon Fiber · Fixed Wireless in parts of the area	980 / 880
T-Mobile Fixed Wireless	100 / 20

May also be available: AT&T, Starry.

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