Middlesex County and Cambridge City property record for 509 Franklin St, Cambridge, MA 02139
| Property Type | Triplex |
|---|---|
| Details | 6 bd · 6 ba · 3,929 sqft · built 1855 |
| Lot Size | 0.091 acres (4,001 sqft) |
| Owner | Owner Name on Record |
| Last Sale | $1,300,000 (Jun 2010) |
| Tax Bill | $17,374 (2024) |
| Deeds & Mortgages | May 2020 Refinance |
| Flood Zone | Zone X (minimal risk) |
| APN | 120-37 |
| Primary APN | 120-37 |
|---|---|
| Alternative APN |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 6 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 14 Rooms |
| Units | 3 Units |
| Stories | 3 Stories |
| Building Area | 3,929 sqft Living Area |
| Gross Area | 5,438 sqft |
| 1st Floor Area | 1,479 sqft |
| Basement Area | 1,443 sqft |
| Unfinished Basement | 1,443 sqft |
| Central Vacuum | Central Vacuum |
| Year Built | Built 1855 |
|---|---|
| Architectural Style | Other |
| Exterior Material | Wood Siding |
| Construction Type | Brick |
| Roof Type | Flat |
| Roof Material | Tar & Gravel |
| Lot Area | 4,001 sqft (0.091 acres) |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air |
| Heating Fuel | Gas |
| Account Number | 120-37 |
|---|---|
| Street Address | 509 FRANKLIN ST |
| City | CAMBRIDGE |
| State | MA |
| Zip | 02139-3159 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Triplex |
| Local Zoning Code | C-1 |
| Legal Description | LOT:37 DIST:49 CITY/MUNI/TWP:CAMBRIDGE |
| Legal Subdivision | PLAN 4391 |
| Legal Lot Number | 37 |
| Jurisdiction | CAMBRIDGE MA |
| Township / Civil Division | CAMBRIDGE |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 359400 |
Source: Middlesex County and Cambridge City records, as of April 26, 2024
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Owner Name on Record |
|---|---|
| Mailing Address | 392 UNION AVE, FRAMINGHAM, MA 01702-5854 |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 30, 2010 · Amount on Record |
| Deed Sale | Jun 30, 2010 · Amount on Record |
| Prior Sale | Jun 30, 2010 · Amount on Record |
| Deed Document Number | 54924-87 |
| Last Transfer Date | Jun 29, 2012 |
| Transfer Doc | 59419-75 |
| Record Updated | Jun 7, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CAMBRIDGE MA |
| Property Address | 509 FRANKLIN ST, CAMBRIDGE, MA 02139-3159 |
| Transaction Type | Mortgage |
| Record Updated | Mar 4, 2021 |
| Name | Verified Name |
|---|
| Document Number | 74724-113 |
|---|---|
| Date | May 21, 2020 |
| Book Page | 74724/113 |
| Instrument | 77520 |
| Name | TD BANK NA |
|---|---|
| Type | Bank |
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount Recorded |
Source: Middlesex County and Cambridge City assessment roll, as of January 1, 2024
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Cambridge City |
| Unified School District | Cambridge School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2024 | $17,374.00 (+7.55%) | $2,934,800 (+6.46%) Land $962,100 Building $1,972,700 |
| 2023 | $16,154.00 | $2,756,600 Land $980,000 Building $1,776,600 |
Assessed value is set for property tax purposes and is not a market price estimate.
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.
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 536 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Starry Fixed Wireless | 500 / 200 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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