Middlesex County and Acton Town property record for 436 Old Stone Brook, Acton, MA 01718
| Property Type | Condominium |
|---|---|
| Details | 3 bd · 2.5 ba · 1,620 sqft · built 1972 |
| Lot Size | 10.9 acres (476,874 sqft) |
| Owner | Individual Name on File |
| Last Sale | $286,000 (Jul 2010) |
| Tax Bill | $7,580 (2025) |
| Deeds & Mortgages | Oct 2021 Refinance |
| Flood Zone | Zone X (minimal risk) |
| APN | ACTO M:00B4 B:0143 L:0436 |
| Primary APN | ACTO M:00B4 B:0143 L:0436 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 1,620 sqft Living Area |
| Gross Area | 2,430 sqft |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1972 |
| Architectural Style | Other |
| Exterior Material | Wood Siding |
| Roof Type | Shed Roof |
| Roof Material | Asphalt |
| Lot Area | 476,874 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Street Address | 436 OLD STONE BRK |
|---|---|
| City | ACTON |
| State | MA |
| Zip | 01718-1016 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Local Zoning Code | RA |
| Legal Subdivision | NAGOG WOODS |
| Legal Block | 143 |
| Legal Lot Number | 436 |
| Jurisdiction | ACTON MA |
| Township / Civil Division | ACTON |
| Census Block Group | 1 |
| Census Block | 1008 |
| Census Tract | 363106 |
436 Old Stone Brook, a condominium, is owned and occupied by an individual who bought it in July 2010.
Source: Middlesex County and Acton Town records, as of July 20, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 436 OLD STONE BRK, ACTON, MA 01718-1016 |
| 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 6, 2010 · Amount on File |
| Deed Sale | Jul 6, 2010 · Amount on File |
| Prior Sale | Mar 23, 2007 · Amount on File |
| Deed Document Number | 2010110825 |
| Deed Book / Page | 54949 / 315 |
| Transfer Doc | 0000015043 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ACTON MA |
| Property Address | 436 OLD STONE BRK, ACTON, MA 01718-1016 |
| Transaction Type | Mortgage |
| Record Updated | Nov 12, 2021 |
| Name | Verified Name |
|---|
| Document Number | 78986-187 |
|---|---|
| Date | Oct 25, 2021 |
| Book Page | 78986/187 |
| Instrument | 233390 |
| Name | HOME POINT FINANCIAL CORPORATION |
|---|---|
| Type | Government Agency |
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount on Record |
| Term | 121 Months |
| Due | Nov 1, 2031 |
The 2025 property tax bill for 436 Old Stone Brook was $7,580, up 1% from the year before.
Source: Middlesex County and Acton Town assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| County Subdivision | Acton Town |
| Unified School District | Acton-Boxborough Regional School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $7,580.00 (+9.97%) | $442,000 (+6.89%) Building $442,000 | $509,200 (+1.67%) |
| 2024 | $6,893.00 (+10.27%) | $413,500 (+16.15%) Building $413,500 | $500,840 |
| 2023 | $6,251.00 | $356,000 Building $356,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 436 Old Stone Brook in Zone X, an area of minimal flood risk.
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 | 1 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 436 Old Stone Brook 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 | ACTON WATER SUPPLY DISTRICT serves 21,285 people · EPA ID MA2002000 |
|---|---|
| Water Source | Groundwater influenced by surface water |
| Last State Inspection | Oct 2024 |
| Lead | 4 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 22 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 80 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber | 2,300 / 2,300 |
| Xfinity Cable | 2,000 / 2,000 |
May also be available: T-Mobile.
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