Middlesex County and Waltham City property record for 21 Gilbert St, Waltham, MA 02453
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 1.5 ba · 1,574 sqft · built 1989 |
| Lot Size | 0.115 acres (5,001 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $7,432 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 194015 |
| Primary APN | 194015 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Stories | 2 Stories |
| Building Area | 1,574 sqft Living Area |
| Gross Area | 2,871 sqft |
| 1st Floor Area | 2,821 sqft |
| Basement Area | 672 sqft |
| Unfinished Basement | 672 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1989 |
|---|---|
| Effective Year Built | Effective 1989 |
| Architectural Style | Colonial |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 5,001 sqft (0.115 acres) |
| Deck Area | Deck Area |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Oil |
| Account Number | 194015 |
|---|---|
| Street Address | 21 GILBERT ST |
| City | WALTHAM |
| State | MA |
| Zip | 02453-6807 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Block | 14 |
| Legal Lot Number | 3A |
| Jurisdiction | WALTHAM MA |
| Township / Civil Division | WALTHAM |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 368800 |
Source: Middlesex County and Waltham City assessment roll, 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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 21 GILBERT ST, WALTHAM, MA 02453-6807 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Et Al (and Others) |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Record Updated | Sep 20, 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 | Assessed Market Value |
|---|---|---|---|
| 2025 | $7,432.00 (+2.36%) | $756,800 (+0.48%) Land $378,000 Building $378,800 | $775,200 (+11.17%) |
| 2024 | $7,261.00 (+8.42%) | $753,200 (+16.07%) Land $378,000 Building $375,200 | $697,300 |
| 2023 | $6,697.00 | $648,900 Land $343,000 Building $305,900 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 |
| Nearby Flood Claims | 5 (1978–2008) |
| Most Recent Claim | Dec 2008 · Severe Winter Storm 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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 534 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 |
| Radiate Holdings Cable | 1,500 / 50 |
May also be available: AT&T, T-Mobile USA.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures