Middlesex County and Watertown City property record for 21 Hall Ave, Watertown, MA 02472 · Last verified April 2026
| Property Type | Residential > Multi-Unit > Duplex |
|---|---|
| Bedrooms | 5 Beds |
| Bathrooms | 3.5 Baths |
| Year Built | Built 1920 |
| Square Footage | 3,162 sqft Living Area |
| Lot Size | 4,500 sqft (0.103 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $284,000 (1998) |
| Tax Bill | $12,690.00 (2025) |
| Primary APN | 18400-31 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Partial Baths | 1 Partial Baths |
| Total Rooms | 12 Rooms |
| Units | 2 Units |
| Building Area | 3,162 sqft Living Area |
| Gross Area | 5,328 sqft Gross Area |
| Basement Area | 1,088 sqft Basement |
| Unfinished Basement | 1,088 sqft Unfinished |
| Stories | 3 Stories |
| Fireplace | Fireplace |
| Fireplaces | 1 Fireplaces |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 1920 |
| Architectural Style | Other Style |
| Exterior Material | Aluminum/Vinyl Exterior |
| Construction Type | Frame Construction |
| Roof Construction | Gambrel Roof Construction |
| Roof Material | Asphalt Roof |
| Lot Area | 4,500 sqft (0.103 acres) |
| Heating System | Hot Water Heating |
|---|---|
| Heating Fuel | Gas Heating Fuel |
| Account Number | 6117 |
|---|---|
| Street Address | 21 HALL AVE |
| City | WATERTOWN |
| State | MA |
| Zip | 02472-1226 |
| Property Usage | Residential Property Usage |
| Type | Residential > Multi-Unit > Duplex |
| Legal Subdivision | PLAN 467A |
| Legal Block | 18 |
| Legal Lot Number | 266 |
| Jurisdiction | WATERTOWN MA |
| Minor Civil Division | WATERTOWN TOWN |
| Census Blockgroup | 4 |
| Census Block | 4005 |
| Census Tract | 370202 |
Source: Middlesex County and Watertown City records · APN 18400-31
Assessment roll updated April 14, 2026 · Last verified April 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 21 HALL AVE, WATERTOWN, MA 02472-1226 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Feb 10, 1998 · Amount on Record |
| Deed Sale | Feb 10, 1998 · Amount on Record |
| Record Refreshed | Jun 08, 2026 |
Source: Middlesex County and Watertown City records · Assessment roll updated April 14, 2026 · Last verified April 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Watertown City |
| Unified School District | Watertown School District (PK - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $12,690.00 (+7.76%) | $1,086,500 (+7.95%) Land $514,900 Building $571,600 |
| 2024 | $11,776.00 (-11.41%) | $1,006,500 (+2.82%) Land $501,000 Building $505,500 |
| 2023 | $13,293.00 | $978,900 Land $479,300 Building $499,600 |
Source: FEMA National Flood Hazard Layer, Middlesex County (25017C), updated September 10, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
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