Berkshire County and Williamstown Town property record for 643 Main St, Williamstown, MA 01267
| Property Type | Duplex |
|---|---|
| Details | 2 bd · 2.5 ba · 1,680 sqft · built 1860 |
| Lot Size | 0.21 acres (9,148 sqft) |
| Owner | Company Name on Record |
| Last Sale | $270,000 (Jan 2022) |
| Tax Bill | $3,850 (2025) |
| Deeds & Mortgages | Jan 2022 Sale & Mortgage |
| APN | M_61114_941288 |
| Primary APN | M_61114_941288 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 1,680 sqft Living Area |
| Gross Area | 3,076 sqft |
| 1st Floor Area | 960 sqft |
| Basement Area | 960 sqft |
| Unfinished Basement | 960 sqft |
| Year Built | Built 1860 |
|---|---|
| Effective Year Built | Effective 1979 |
| Architectural Style | Conventional |
| Exterior Material | Wood Siding |
| Construction Type | Stone |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 9,148 sqft (0.21 acres) |
| Heating System | Steam |
|---|---|
| Heating Fuel | Oil |
| Account Number | M_61114_941288 |
|---|---|
| Street Address | 643 MAIN ST |
| City | WILLIAMSTOWN |
| State | MA |
| Zip | 01267-2643 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | GR |
| Legal Block | 22 |
| Jurisdiction | WILLIAMSTOWN MA |
| Township / Civil Division | WILLIAMSTOWN |
| Census Block Group | 2 |
| Census Block | 2000 |
| Census Tract | 920102 |
Source: Berkshire County and Williamstown Town records, as of April 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 893 N HOOSAC RD, WILLIAMSTOWN, MA 01267-2300 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jan 14, 2022 · Amount on Record |
| Deed Sale | Jan 14, 2022 · Amount on Record |
| Prior Sale | Jul 9, 1996 · Amount on Record |
| Deed Book / Page | 1778 / 899 |
| Record Updated | Jun 8, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | WILLIAMSTOWN MA |
| Recording Date | Jan 14, 2022 |
| Property Address | 643 MAIN ST, WILLIAMSTOWN, MA 01267-2643 |
| Document Number | 001778-899 |
| Book / Page | 1778 / 899 |
| Instrument Date | Jan 14, 2022 |
| Instrument | 321 |
| Transaction Type | Transfer |
| Record Updated | Nov 11, 2025 |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 893 N HOOSAC RD, WILLIAMSTOWN, MA 01267-2300 |
| Document Number | 0000000322 |
|---|---|
| Date | Jan 14, 2022 |
| Instrument | 322 |
| Name | GREYLOCK FCU |
|---|---|
| Type | Credit Union |
| Type | Stand-Alone First Mortgage |
|---|---|
| Amount | Amount Recorded |
Source: Berkshire County and Williamstown Town assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Berkshire County |
| County Subdivision | Williamstown Town |
| Unified School District | Mount Greylock School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $3,850.00 (-2.58%) | $279,000 (+14.16%) Land $80,300 Building $198,700 |
| 2023 | $3,952.00 | $244,400 Land $68,400 Building $176,000 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Not on file |
|---|---|
| Nearby Flood Policies | 5 in force |
| Nearby Flood Claims | 3 (2005) |
| Most Recent Claim | Oct 2005 · Severe Storms And Flooding |
| Claims by Event |
|
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 | WILLIAMSTOWN WATER DEPT serves 7,326 people · EPA ID MA1341000 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | May 2024 |
| Lead | Under 1 ppb (2019–2021) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 2 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 112 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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