Middlesex County and Somerville City property record for 23 William St, Somerville, MA 02144
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,918 sqft · built 1890 |
| Lot Size | 0.055 acres (2,400 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $13,730 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 16-D-22 |
| Primary APN | 16-D-22 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 3 Stories |
| Building Area | 1,918 sqft Living Area |
| Gross Area | 3,460 sqft |
| Year Built | Built 1890 |
|---|---|
| Effective Year Built | Effective 1890 |
| Architectural Style | Conventional |
| Exterior Material | Aluminum/Vinyl |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 2,400 sqft (0.055 acres) |
| Parking Spaces | 1 Parking Space |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Gas |
| Account Number | 13404205 |
|---|---|
| Street Address | 23 WILLIAM ST |
| City | SOMERVILLE |
| State | MA |
| Zip | 02144-1933 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | NR |
| Legal Block | D |
| Legal Lot Number | 22 |
| Jurisdiction | SOMERVILLE MA |
| Township / Civil Division | SOMERVILLE |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 350500 |
23 William St is owned and occupied by an individual.
Source: Middlesex County and Somerville City records, as of September 28, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 23 WILLIAM ST, SOMERVILLE, MA 02144-1933 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 23 William St was $13,730, up 6.2% from the year before.
Source: Middlesex County and Somerville City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Somerville City |
| Unified School District | Somerville School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $13,730.00 (+6.19%) | $1,258,500 (+2.39%) Land $730,900 Building $527,600 | $1,692,805 (-20.68%) |
| 2024 | $12,930.00 (+5.59%) | $1,229,100 (+3.78%) Land $730,900 Building $498,200 | $2,134,080 |
| 2023 | $12,246.00 | $1,184,300 Land $730,900 Building $453,400 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 23 William 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 |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 4 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.
The area around 23 William 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.
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 |
| 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.
Source: FCC Broadband Data Collection, based on 1,241 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Netafy Fixed Wireless | 564 / 125 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Starry, Verizon.
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