Montgomery County property record for 4 Treworthy Rd, Gaithersburg, MD 20878
| Property Type | Single Family Home |
|---|---|
| Details | 3.5 ba · 3,534 sqft · built 1973 |
| Lot Size | 0.235 acres (10,235 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $236,000 (Aug 1997) |
| Tax Bill | $9,311 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 09-01521677 |
| Primary APN | 09-01521677 |
|---|---|
| Alternative APN |
|
| Full Baths | 3.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 3,534 sqft Living Area |
| Gross Area | 3,754 sqft |
| 1st Floor Area | 1,577 sqft |
| Basement Area | 600 sqft |
| Finished Basement | 600 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1973 |
|---|---|
| Effective Year Built | Effective 1973 |
| Architectural Style | Bi-Level |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Roof Material | Composition Shingle |
| Lot Area | 10,235 sqft (0.235 acres) |
| Garage Type | Attached |
| Garage Area | 220 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | HVAC |
| Sewer | Municipal |
| Account Number | 01521677 |
|---|---|
| Street Address | 4 TREWORTHY RD |
| City | GAITHERSBURG |
| State | MD |
| Zip | 20878-2614 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R90 |
| Legal Description | WESTLEIGH |
| Legal Subdivision | WESTLEIGH |
| Legal Block | A |
| Legal Lot Number | 2 |
| Jurisdiction | MONTGOMERY MD |
| Township / Civil Division | 9 |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 700828 |
4 Treworthy Rd is owned and occupied by two individuals who acquired it in August 2012.
Source: Montgomery County records, as of August 17, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4 TREWORTHY RD, GAITHERSBURG, MD 20878-2614 |
| 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 | 2 Names on Deed |
|---|---|
| Last Sale | Aug 27, 1997 · Amount on File |
| Deed Sale | Aug 27, 1997 · Amount on File |
| Deed Document Number | 199799478 |
| Deed Book / Page | 15114 / 183 |
| Last Transfer Date | Aug 6, 2012 |
| Transfer Doc | 0451290396 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 4 Treworthy Rd was $9,311, up 5.8% from the year before.
Source: Montgomery County assessment roll, as of August 17, 2026
| Type | Name |
|---|---|
| State | Maryland |
| County | Montgomery County |
| Municipality | Gaithersburg City |
| Unified School District | Montgomery County Public Schools (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $717,900 (+5.08%) Land $292,200 Building $425,700 | $717,900 (-) Land $292,200 Building $425,700 | |
| 2025 | $9,311.00 (+5.76%) | $683,167 | $717,900 Land $292,200 Building $425,700 |
| 2024 | $8,804.00 | ||
| 2023 | $613,700 Land $292,200 Building $321,500 | $613,700 Land $292,200 Building $321,500 | |
| 2022 | $7,205.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4 Treworthy Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective April 12, 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 | 3 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 4 Treworthy Rd 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 98% of the US · lower than 96% of Maryland |
|---|---|
| Wildfire Likelihood | Under 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 | WASHINGTON SUBURBAN SANITARY COMMISSION serves 1,900,000 people · EPA ID MD0150005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | May 2025 |
| Lead | Under 1 ppb (2018–2020) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None 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 354 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 / 250 |
| T-Mobile Fixed Wireless | 100 / 20 |
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