Suffolk County and Boston City property record for 9 Knox St, Boston, MA 02116
| Property Type | Duplex |
|---|---|
| Details | 5 bd · 3.5 ba · 3,174 sqft · built 1850 |
| Lot Size | 0.017 acres (750 sqft) |
| Owner | Individual Name on File |
| Last Sale | $466,850 (Jul 1997) |
| Tax Bill | $25,522 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | CBOS W:05 P:00742 S:000 |
| Primary APN | CBOS W:05 P:00742 S:000 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 13 Rooms |
| Units | 2 Units |
| Stories | 3 Stories |
| Building Area | 3,174 sqft Living Area |
| Gross Area | 3,442 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1850 |
|---|---|
| Effective Year Built | Effective 2012 |
| Architectural Style | Other |
| Exterior Material | Brick |
| Construction Type | Masonry / Concrete Block |
| Roof Type | Mansard |
| Roof Material | Slate |
| Lot Area | 750 sqft (0.017 acres) |
| Heating System | Hot Water |
|---|
| Street Address | 9 KNOX ST |
|---|---|
| City | BOSTON |
| State | MA |
| Zip | 02116-5503 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R2 |
| Jurisdiction | BOSTON MA |
| Township / Civil Division | BOSTON |
| Census Block Group | 1 |
| Census Block | 1007 |
| Census Tract | 70302 |
9 Knox St, a duplex, is owned and occupied by an individual who bought it in July 1997.
Source: Suffolk County and Boston City records, as of April 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 9 KNOX ST, BOSTON, MA 02116-5503 |
| 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 |
|---|---|
| Last Sale | Jul 10, 1997 · Amount on File |
| Deed Sale | Jul 10, 1997 · Amount on File |
| Deed Book / Page | 21551 / 212 |
| Record Updated | Jun 8, 2026 |
The 2025 property tax bill for 9 Knox St was $25,522, up 14.3% from the year before.
Source: Suffolk County and Boston City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Suffolk County |
| Municipality | Boston City |
| Unified School District | Boston School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $25,522.00 (+14.25%) | $2,204,000 (+7.54%) Land $587,500 Building $1,616,500 |
| 2024 | $22,338.00 (+1.49%) | $2,049,400 (-) Land $459,600 Building $1,589,800 |
| 2023 | $22,011.00 | $2,049,400 Land $459,600 Building $1,589,800 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 9 Knox St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective January 21, 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 10 (0% premium discount) |
| Nearby Flood Policies | 6 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 9 Knox 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 | BOSTON WATER AND SEWER COMMISSION (MWRA) serves 675,647 people · EPA ID MA3035000 |
|---|---|
| Water Source | Purchased surface water from MWRA |
| Last State Inspection | Mar 2026 |
| Lead | 6 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Lead service line replacement currently in violation since Nov 2020 |
| 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 733 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 |
| Netafy Fixed Wireless | 1,000 / 1,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 980 / 880 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, Starry.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures