Middlesex County and Watertown City property record for 550 Main St, Watertown, MA 02472
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,768 sqft · built 1948 |
| Lot Size | 0.139 acres (6,046 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $181,000 (Aug 1987) |
| Tax Bill | $10,124 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 38120-20 |
| Primary APN | 38120-20 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,768 sqft Living Area |
| Gross Area | 2,861 sqft |
| Basement Area | 901 sqft |
| Unfinished Basement | 901 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1948 |
|---|---|
| Effective Year Built | Effective 1948 |
| Architectural Style | Colonial |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Type | Gambrel |
| Roof Material | Asphalt |
| Lot Area | 6,046 sqft (0.139 acres) |
| Parking Spaces | 1 Parking Space |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Gas |
| Account Number | 8883 |
|---|---|
| Street Address | 550 MAIN ST |
| City | WATERTOWN |
| State | MA |
| Zip | 02472-2224 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | S-6 |
| Legal Subdivision | 18 HOUSE |
| Legal Block | 1A |
| Jurisdiction | WATERTOWN MA |
| Township / Civil Division | WATERTOWN TOWN |
| Census Block Group | 2 |
| Census Block | 2008 |
| Census Tract | 370104 |
550 Main St is owned and occupied by two individuals who bought it in August 1987.
Source: Middlesex County and Watertown City records, as of October 20, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 550 MAIN ST, WATERTOWN, MA 02472-2224 |
| 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 | 2 Names on Deed |
|---|---|
| Last Sale | Aug 27, 1987 · Amount on File |
| Deed Sale | Aug 27, 1987 · Amount on File |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 550 Main St was $10,124, up 6.4% from the year before.
Source: Middlesex County and Watertown City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Watertown City |
| Unified School District | Watertown School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $10,124.00 (+6.37%) | $829,800 (+1.83%) Land $464,300 Building $365,500 | $1,063,403 (+35.19%) |
| 2025 | $9,518.00 (+7.39%) | $814,900 (+7.58%) Land $464,300 Building $350,600 | $786,600 (-9.76%) |
| 2024 | $8,863.00 (-9.57%) | $757,500 (+4.96%) Land $451,500 Building $306,000 | $871,720 |
| 2023 | $9,801.00 | $721,700 Land $444,200 Building $277,500 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 550 Main 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 | 59 units insured incl. 56 condo units |
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 550 Main 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 | WATERTOWN DEPARTMENT OF PUBLIC WORKS serves 35,985 people · EPA ID MA3314000 |
|---|---|
| Water Source | Purchased surface water from MWRA |
| Last State Inspection | Oct 2025 |
| Lead | 1 ppb (2025) action level 15 ppb |
| 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.
Source: FCC Broadband Data Collection, based on 926 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Astound Broadband Cable | 1,500 / 50 |
| Verizon Fiber · Fixed Wireless in parts of the area | 980 / 880 |
May also be available: AT&T, T-Mobile.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures