Middlesex County and Waltham City property record for 9 4th Ave, Waltham, MA 02451
| Property Type | R&D Facility, Laboratory |
|---|---|
| Details | 1.5 ba · 25,740 sqft · built 1962 |
| Lot Size | 2.45 acres (106,935 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $152,862 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 111300 |
| Primary APN | 111300 |
|---|---|
| Alternative APN |
|
| Full Baths | 1.5 Baths |
|---|---|
| Half Baths | 3 Half Baths |
| Stories | 1 Story |
| Building Area | 25,740 sqft Total Area |
| Gross Area | 25,956 sqft |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1962 |
| Exterior Material | Brick |
| Construction Type | Steel Frame |
| Foundation Type | Slab (Mat/Raft) |
| Roof Type | Flat |
| Roof Material | Tar & Gravel |
| Lot Area | 106,935 sqft (2.45 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Account Number | 111300 |
|---|---|
| Street Address | 9 4TH AVE |
| City | WALTHAM |
| State | MA |
| Zip | 02451-7506 |
| Property Category | Industrial |
| Property Type | Industrial > R&D Facility, Laboratory |
| Legal Block | 8 |
| Legal Lot Number | 2 |
| Jurisdiction | WALTHAM MA |
| Township / Civil Division | WALTHAM |
| Census Block Group | 3 |
| Census Block | 3013 |
| Census Tract | 368200 |
Source: Middlesex County and Waltham City records, as of October 20, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 1 GATEWAY CTR, 500, NEWTON, MA 02458-2878 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
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 | $152,862.00 (+7.99%) | $6,891,900 (+2.44%) Land $3,736,600 Building $3,155,300 |
| 2025 | $141,553.00 (+12.58%) | $6,727,800 (+10.81%) Land $3,610,400 Building $3,117,400 |
| 2024 | $125,739.00 | $6,071,400 Land $3,277,100 Building $2,794,300 |
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 |
| Nearby Flood Policies | 2 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 | Low lower than 80% of the US · above 57% of Massachusetts |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 19 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, T-Mobile, Verizon.
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