Middlesex County and Lexington Town property record for 25 Mason St, Lexington, MA 02421
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2.5 ba · 1,275 sqft · built 1970 |
| Lot Size | 0.356 acres (15,500 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $465,000 (Oct 2003) |
| Tax Bill | $16,975 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | LEXI M:0014 L:000148 |
| Primary APN | LEXI M:0014 L:000148 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,275 sqft Living Area |
| Gross Area | 4,592 sqft |
| 1st Floor Area | 1,275 sqft |
| Basement Area | 1,275 sqft |
| Unfinished Basement | 625 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1970 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Contemporary |
| Exterior Material | Wood Siding |
| Roof Type | Shed Roof |
| Roof Material | Other |
| Lot Area | 15,500 sqft (0.356 acres) |
| Deck Area | Deck Area |
| Cooling System | HVAC |
|---|---|
| Heating System | Hot Water |
| Heating Fuel | Oil |
| Street Address | 25 MASON ST |
|---|---|
| City | LEXINGTON |
| State | MA |
| Zip | 02421-6327 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RS |
| Legal Lot Number | 148 |
| Jurisdiction | LEXINGTON MA |
| Township / Civil Division | LEXINGTON |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 358100 |
25 Mason St is owned and occupied by two individuals who bought it in October 2003.
Source: Middlesex County and Lexington 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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 25 MASON ST, LEXINGTON, MA 02421-6327 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 28, 2003 · Amount on File |
| Deed Sale | Oct 28, 2003 · Amount on File |
| Prior Sale | Oct 28, 2003 · Amount on File |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 25 Mason St was $16,975, up 3.9% from the year before.
Source: Middlesex County and Lexington Town assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| County Subdivision | Lexington Town |
| Unified School District | Lexington School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $16,975.00 (+3.89%) | $1,379,000 (+3.22%) Land $767,000 Building $612,000 | $1,314,051 |
| 2025 | $16,339.00 (+6.19%) | $1,336,000 (+6.37%) Land $730,000 Building $606,000 | |
| 2024 | $15,386.00 (+4.74%) | $1,256,000 (+11.15%) Land $695,000 Building $561,000 | |
| 2023 | $14,690.00 | $1,130,000 Land $632,000 Building $498,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 25 Mason St in Zone X, an area of minimal flood risk, though there have been 5 flood claims nearby since 1979.
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 |
| Nearby Flood Claims | 5 (1979–2010) |
| Claims Outside the SFHA | 4 of 5 |
| Most Recent Claim | Mar 2010 · Severe Storms And Flooding |
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 25 Mason St is low, with less than 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 96% of the US · lower than 92% of Massachusetts |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 | LEXINGTON WATER DEPT. (MWRA) serves 34,074 people · EPA ID MA3155000 |
|---|---|
| Water Source | Purchased surface water from MWRA |
| Last State Inspection | Sep 2023 |
| Lead | 2 ppb (2025) 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 216 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 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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