Middlesex County and Somerville City property record for 21 Warner St, Somerville, MA 02144
| Property Type | Duplex |
|---|---|
| Details | 6 bd · 2 ba · 3,331 sqft · built 1900 |
| Lot Size | 0.109 acres (4,757 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $15,098 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 19-A-20 |
| Primary APN | 19-A-20 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 13 Rooms |
| Units | 2 Units |
| Stories | 3 Stories |
| Building Area | 3,331 sqft Living Area |
| Gross Area | 5,140 sqft |
| Basement Area | 1,152 sqft |
| Unfinished Basement | 1,152 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1900 |
| Architectural Style | Duplex Single |
| Exterior Material | Aluminum/Vinyl |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 4,757 sqft (0.109 acres) |
| Parking Spaces | 3 Parking Spaces |
| Deck Area | Deck Area |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Account Number | 4182165 |
|---|---|
| Street Address | 21 WARNER ST |
| City | SOMERVILLE |
| State | MA |
| Zip | 02144-1320 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | RA |
| Legal Block | A |
| Legal Lot Number | 20 |
| Jurisdiction | SOMERVILLE MA |
| Township / Civil Division | SOMERVILLE |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 350400 |
21 Warner St, a duplex, is owned and occupied by an individual.
Source: Middlesex County and Somerville City records, as of October 20, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 21 WARNER ST, SOMERVILLE, MA 02144-1320 |
| 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 2026 property tax bill for 21 Warner St was $15,098, up 5.5% 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 |
|---|---|---|---|
| 2026 | $15,098.00 (+5.46%) | $1,375,000 (+4.78%) Land $798,700 Building $576,300 | $1,376,657 |
| 2025 | $14,317.00 (+4.49%) | $1,312,300 (+0.75%) Land $760,600 Building $551,700 | |
| 2024 | $13,702.00 (+4.74%) | $1,302,500 (+2.95%) Land $760,600 Building $541,900 | |
| 2023 | $13,082.00 | $1,265,200 Land $760,600 Building $504,600 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 21 Warner St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 10, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 21 Warner St is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 98.7% of Massachusetts |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 714 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Netafy Fixed Wireless | 564 / 125 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, Starry, Verizon.
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