Worcester County and Westborough Town property record for 4400 Computer Dr, Westborough, MA 01581
| Property Type | R&D Facility, Laboratory |
|---|---|
| Details | 4 ba · 677,238 sqft · built 1977 |
| Lot Size | 92.8 acres (4,042,804 sqft) |
| Owner | Company Name on File |
| Last Sale | $65,000,000 (Dec 2021) |
| Tax Bill | $712,450 (2026) |
| Deeds & Mortgages | Dec 2021 Sale Jun 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | WBOR M:0035 B:000159 L:0 |
| Primary APN | WBOR M:0035 B:000159 L:0 |
|---|
| Full Baths | 4 Baths |
|---|---|
| Half Baths | 8 Half Baths |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 677,238 sqft Total Area |
| Basement Area | 76,842 sqft |
| Finished Basement | 54,442 sqft |
| Unfinished Basement | 22,400 sqft |
| Year Built | Built 1977 |
|---|---|
| Effective Year Built | Effective 1977 |
| Exterior Material | Brick |
| Construction Type | Steel Frame |
| Roof Type | Flat |
| Roof Material | Tar & Gravel |
| Lot Area | 4,042,804 sqft (92.8 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Street Address | 4400 COMPUTER DR |
|---|---|
| City | WESTBOROUGH |
| State | MA |
| Zip | 01581-1722 |
| Property Category | Industrial |
| Property Type | Industrial > R&D Facility, Laboratory |
| Local Zoning Code | IB |
| Legal Block | 159 |
| Jurisdiction | WESTBOROUGH MA |
| Township / Civil Division | WESTBOROUGH |
| Census Block Group | 1 |
| Census Block | 1012 |
| Census Tract | 761200 |
4400 Computer Dr, an industrial property, is owned by a company that bought it in December 2021.
Source: Worcester County and Westborough Town records, as of October 20, 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 | Company Name on File |
|---|---|
| Mailing Address | PO BOX 80416, SEATTLE, WA 98108-0416 |
| Owner Type | Company |
| Vesting | Company |
| Date | Document |
|---|---|
| Dec 23, 2021 | Quit Claim Deed, Transfer |
| Jun 1, 2020 | Deed of Trust, Mortgage CARRUTH PARTNERS LLC |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 23, 2021 · Amount on File |
| Deed Sale | Dec 23, 2021 · Amount on File |
| Prior Sale | Sep 21, 1994 · Amount on File |
| Deed Document Number | 2021179938 |
| Deed Book / Page | 66820 / 380 |
| Prior Transfer Date | Dec 2, 2021 |
| Prior Transfer Doc | 066820-380 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | WESTBOROUGH MA |
| Recording Date | Dec 23, 2021 |
| Property Address | 4400 COMPUTER DR, WESTBOROUGH, MA 01581-1722 |
| Document Number | 066820-380 |
| Book / Page | 66820 / 380 |
| Instrument Date | Dec 2, 2021 |
| Instrument | 179938 |
| Transaction Type | Transfer |
| Record Updated | Jan 7, 2022 |
| Amount | Amount on Record |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | PO BOX 80416, SEATTLE, WA 98108-0416 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | WESTBOROUGH MA |
| Property Address | 4400 COMPUTER DR, WESTBOROUGH, MA 01581-1722 |
| Document Number | 63038-183 |
| Instrument Date | Jun 1, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Sep 8, 2020 |
| Title Company | NOT AVAILABLE |
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 116 FLANDERS RD #2000 WESTBOROUGH MA 015811072, 2000, WESTBOROUGH, MA 01581-1072 |
| Document Number | 63038-183 |
|---|---|
| Date | Aug 17, 2020 |
| Book Page | 063038/000183 |
| Instrument | 91895 |
| Name | CARRUTH PARTNERS LLC |
|---|
| Amount | Amount on Record |
|---|
The 2026 property tax bill for 4400 Computer Dr was $712,450, up 4.9% from the year before.
Source: Worcester County and Westborough Town assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Worcester County |
| County Subdivision | Westborough Town |
| Unified School District | Westborough School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $712,450.00 (+4.9%) | $44,723,800 (+7.27%) Land $17,787,100 Building $26,936,700 |
| 2025 | $679,176.00 (-10.16%) | $41,692,800 (-9.49%) Land $15,968,100 Building $25,724,700 |
| 2024 | $755,951.00 (-0.74%) | $46,066,500 (+1.86%) Land $15,968,100 Building $30,098,400 |
| 2023 | $761,599.00 | $45,225,600 Land $15,670,100 Building $29,555,500 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4400 Computer Dr in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective November 30, 2025 · 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.
Wildfire risk around 4400 Computer Dr is low, with a 0.01% annual chance of wildfire.
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 | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | WESTBOROUGH WATER DEPARTMENT serves 21,567 people · EPA ID MA2328000 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Mar 2025 |
| Lead | 2 ppb (2024–2026) action level 15 ppb |
| Water Quality | Treatment failure resolved · Nov 2025 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 3 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 18 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber | 2,300 / 2,300 |
| Spectrum Cable | 1,000 / 35 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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