Middlesex County and Waltham City property record for 12 Clematis Ave, Waltham, MA 02453
| Property Type | General Industrial |
|---|---|
| Details | 3 bd · 4 ba · 12,152 sqft · built 1985 |
| Lot Size | 0.333 acres (14,488 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $44,584 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 25449 |
| Primary APN | 25449 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 4 Baths |
| Half Baths | 4 Half Baths |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 12,152 sqft Total Area |
| 1st Floor Area | 1,496 sqft |
| Basement Area | 5,248 sqft |
| Finished Basement | 5,248 sqft |
| Unfinished Basement | 5,248 sqft |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Colonial |
| Exterior Material | Brick |
| Construction Type | Steel Frame |
| Roof Type | Flat |
| Roof Material | Tar & Gravel |
| Lot Area | 14,488 sqft (0.333 acres) |
| Garage Type | Attached |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Account Number | 25449 |
|---|---|
| Street Address | 12 CLEMATIS AVE |
| City | WALTHAM |
| State | MA |
| Zip | 02453-7011 |
| Property Category | Industrial |
| Property Type | Industrial > General Industrial |
| Legal Block | 5 |
| Legal Lot Number | 6 |
| Jurisdiction | WALTHAM MA |
| Township / Civil Division | WALTHAM |
| Census Block Group | 4 |
| Census Block | 4000 |
| Census Tract | 369100 |
12 Clematis Ave, an industrial property, is owned by a company.
Source: Middlesex County and Waltham City records, as of October 20, 2026
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 21 CARROLL ST, WATERTOWN, MA 02472-3329 |
| Owner Type | Company |
| Vesting | Company |
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 |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 12 Clematis Ave was $44,584, up 12.4% from the year before.
Source: Middlesex County and Waltham City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Waltham City |
| Unified School District | Waltham School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $44,584.00 (+12.38%) | $2,010,100 (+6.6%) Land $463,200 Building $1,546,900 |
| 2025 | $39,673.00 (+12.56%) | $1,885,600 (+10.79%) Land $437,000 Building $1,448,600 |
| 2024 | $35,246.00 | $1,701,900 Land $397,500 Building $1,304,400 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 12 Clematis Ave in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 1 (1992) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Dec 1992 · Winter Coastal Storm |
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 12 Clematis Ave 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 | WALTHAM WATER DEPARTMENT serves 65,218 people · EPA ID MA3308000 |
|---|---|
| Water Source | Purchased surface water from MWRA |
| Last State Inspection | Jun 2024 |
| Lead | 2 ppb (2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 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 348 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
| Xfinity Cable | 2,000 / 2,000 |
| Astound Broadband Cable | 1,500 / 50 |
May also be available: T-Mobile.
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