173 Walnut St, Somerville, MA 02145 Property Records

Middlesex County and Somerville City property record for 173 Walnut St, Somerville, MA 02145

Property Summary

Property Type	Condominium
Details	4 bd · 2.5 ba · 2,023 sqft · built 2015
Lot Size	0.191 acres (8,305 sqft)
Owner	2 Trust Names on File
Last Sale	$1,099,000 (Apr 2025)
Tax Bill	$9,903 (2026)
Deeds & Mortgages	Apr 2025 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`20171570`

Property Details

APN / Parcel Number

Primary APN	`20171570`
Alternative APN	`SOME M:78 B:A L:12 U:7`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	2 Stories
Building Area	2,023 sqft Living Area
Gross Area	3,678 sqft
Basement Area	968 sqft
Unfinished Basement	968 sqft

Exterior

Year Built	Built 2015
Effective Year Built	Effective 2015
Architectural Style	Condo/Apartment
Lot Area	8,305 sqft (0.191 acres)
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

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

Location & Zoning

Account Number	20171570
Street Address	173 WALNUT ST
City	SOMERVILLE
State	MA
Zip	02145-2945
Property Category	Residential
Property Type	Residential > Condominium / Townhouse > Condominium
Local Zoning Code	UR
Legal Block	A
Legal Lot Number	12
Jurisdiction	SOMERVILLE MA
Township / Civil Division	SOMERVILLE
Census Block Group	3
Census Block	3003
Census Tract	350201

Owner

173 Walnut St, a condominium, is held in a trust since April 2025.

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

Owner of Record	2 Trust Names on File
Mailing Address	173 WALNUT ST, 7-175, SOMERVILLE, MA 02145-2945
Owner Type	Company
Vesting	Trust, Revocable 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

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 17, 2025 · Amount on File
Deed Sale	Apr 17, 2025 · Amount on File
Deed Book / Page	83979 / 388
Prior Transfer Date	Apr 16, 2025
Prior Transfer Doc	083979-388
Record Updated	Oct 29, 2026

April 2025: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SOMERVILLE MA
Recording Date	Apr 17, 2025
Property Address	173 WALNUT ST, SOMERVILLE, MA 02145-2945
Document Number	083979-388
Book / Page	83979 / 388
Instrument Date	Apr 16, 2025
Instrument	40185
Transaction Type	Transfer
Record Updated	Mar 13, 2026

Transaction

Amount	Amount on Record
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	173 WALNUT ST # 7-175, 7-175, SOMERVILLE, MA 02145-2945

Mortgage

Document Number	0000040186
Date	Apr 17, 2025
Instrument	40186

Lender

Name	CITIZENS BANK
Type	Bank

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate
Rate	5.88%
Type Change Date	May 1, 2035
Max Rate At Change	2.75%
Index	Other

Tax Assessment & Valuation

The 2026 property tax bill for 173 Walnut St was $9,903, down 0.4% from the year before.

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$9,903.00 (-0.39%)	$901,900 (-1.03%) Building $901,900	$1,057,998 (+2.01%)
2025	$9,942.00 (+7.99%)	$911,300 (+4.14%) Building $911,300	$1,037,115 (+0.75%)
2024	$9,206.00 (+3.3%)	$875,100 (+1.53%) Building $875,100	$1,029,420
2023	$8,912.00	$861,900 Building $861,900

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

Flood

FEMA maps place 173 Walnut St in Zone X, an area of minimal flood risk.

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

The area around 173 Walnut St 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	SOMERVILLE WATER DEPT. (MWRA) serves 81,045 people · EPA ID MA3274000
Water Source	Purchased surface water from MWRA
Last State Inspection	Oct 2025
Lead	4 ppb (2025) 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 2019
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 1,104 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
Netafy Fixed Wireless	641 / 143
AT&T Fixed Wireless	100 / 20

May also be available: Starry, T-Mobile, Verizon.

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