Middlesex County and Cambridge City property record for 550 Green St, Cambridge, MA 02139
| Property Type | Triplex |
|---|---|
| Details | 4 bd · 4.5 ba · 3,315 sqft · built 1873 |
| Lot Size | 0.068 acres (2,969 sqft) |
| Owner | Individual Name on File |
| Last Sale | $50,000 (Sep 1977) |
| Tax Bill | $12,213 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 120-25 |
| Primary APN | 120-25 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Units | 3 Units |
| Stories | 3 Stories |
| Building Area | 3,315 sqft Living Area |
| Gross Area | 5,324 sqft |
| 1st Floor Area | 1,350 sqft |
| Basement Area | 1,350 sqft |
| Unfinished Basement | 1,350 sqft |
| Year Built | Built 1873 |
|---|---|
| Effective Year Built | Effective 1873 |
| Architectural Style | Triplex |
| Exterior Material | Wood Siding |
| Construction Type | Brick |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 2,969 sqft (0.068 acres) |
| Garage Type | Basement |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Hot Water |
| Heating Fuel | Gas |
| Street Address | 550 GREEN ST |
|---|---|
| City | CAMBRIDGE |
| State | MA |
| Zip | 02139-3120 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Triplex |
| Local Zoning Code | C-1 |
| Legal Lot Number | 25 |
| Jurisdiction | CAMBRIDGE MA |
| Township / Civil Division | CAMBRIDGE |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 359400 |
550 Green St, a triplex, is owned and occupied by an individual who bought it in September 1977.
Source: Middlesex County and Cambridge City records, as of April 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 550 GREEN ST, CAMBRIDGE, MA 02139-3120 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 19, 1977 · Amount on File |
| Deed Sale | Sep 19, 1977 · Amount on File |
| Record Updated | Jun 8, 2026 |
The 2025 property tax bill for 550 Green St was $12,213, up 6.9% from the year before.
Source: Middlesex County and Cambridge City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Cambridge City |
| Unified School District | Cambridge School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $12,213.00 (+6.85%) | $1,923,300 (-0.39%) Land $839,800 Building $1,083,500 |
| 2024 | $11,430.00 (+5.79%) | $1,930,800 (+4.72%) Land $887,200 Building $1,043,600 |
| 2023 | $10,804.00 | $1,843,700 Land $903,700 Building $940,000 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 550 Green 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 9 (5% premium discount) |
| Nearby Flood Policies | 3 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 550 Green 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 | CAMBRIDGE WATER DEPARTMENT serves 118,214 people · EPA ID MA3049000 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jun 2023 |
| Lead | 8 ppb (2021–2023) 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 1,046 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 |
| Verizon Fixed Wireless · Fiber in parts of the area | 1,000 / 75 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, Netafy, Starry.
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